diff --git a/contrib/adminpack/adminpack--1.0.sql b/contrib/adminpack/adminpack--1.0.sql
index 0502a4c01f3fd6de6ca0ba6daea6f7e14e5d44f1..090702231c0cf8ee336be621c41ef2a0778d846f 100644
--- a/contrib/adminpack/adminpack--1.0.sql
+++ b/contrib/adminpack/adminpack--1.0.sql
@@ -6,27 +6,27 @@
 
 /* generic file access functions */
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_file_write(text, text, bool)
+CREATE FUNCTION pg_catalog.pg_file_write(text, text, bool)
 RETURNS bigint
 AS 'MODULE_PATHNAME', 'pg_file_write'
 LANGUAGE C VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_file_rename(text, text, text)
+CREATE FUNCTION pg_catalog.pg_file_rename(text, text, text)
 RETURNS bool
 AS 'MODULE_PATHNAME', 'pg_file_rename'
 LANGUAGE C VOLATILE;
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_file_rename(text, text)
+CREATE FUNCTION pg_catalog.pg_file_rename(text, text)
 RETURNS bool
 AS 'SELECT pg_catalog.pg_file_rename($1, $2, NULL::pg_catalog.text);'
 LANGUAGE SQL VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_file_unlink(text)
+CREATE FUNCTION pg_catalog.pg_file_unlink(text)
 RETURNS bool
 AS 'MODULE_PATHNAME', 'pg_file_unlink'
 LANGUAGE C VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_logdir_ls()
+CREATE FUNCTION pg_catalog.pg_logdir_ls()
 RETURNS setof record
 AS 'MODULE_PATHNAME', 'pg_logdir_ls'
 LANGUAGE C VOLATILE STRICT;
@@ -34,17 +34,17 @@ LANGUAGE C VOLATILE STRICT;
 
 /* Renaming of existing backend functions for pgAdmin compatibility */
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_file_read(text, bigint, bigint)
+CREATE FUNCTION pg_catalog.pg_file_read(text, bigint, bigint)
 RETURNS text
 AS 'pg_read_file'
 LANGUAGE INTERNAL VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_file_length(text)
+CREATE FUNCTION pg_catalog.pg_file_length(text)
 RETURNS bigint
 AS 'SELECT size FROM pg_catalog.pg_stat_file($1)'
 LANGUAGE SQL VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION pg_catalog.pg_logfile_rotate()
+CREATE FUNCTION pg_catalog.pg_logfile_rotate()
 RETURNS int4
 AS 'pg_rotate_logfile'
 LANGUAGE INTERNAL VOLATILE STRICT;
diff --git a/contrib/btree_gin/btree_gin--1.0.sql b/contrib/btree_gin/btree_gin--1.0.sql
index 08bbff721fbe38c9bafdfd314947bbdcd4c8fa05..07f93640f3382d3fba84cbf51390f6342ecff563 100644
--- a/contrib/btree_gin/btree_gin--1.0.sql
+++ b/contrib/btree_gin/btree_gin--1.0.sql
@@ -1,21 +1,21 @@
 /* contrib/btree_gin/btree_gin--1.0.sql */
 
-CREATE OR REPLACE FUNCTION gin_btree_consistent(internal, int2, anyelement, int4, internal, internal)
+CREATE FUNCTION gin_btree_consistent(internal, int2, anyelement, int4, internal, internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_int2(int2, internal)
+CREATE FUNCTION gin_extract_value_int2(int2, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_int2(int2, int2, int2, internal)
+CREATE FUNCTION gin_compare_prefix_int2(int2, int2, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_int2(int2, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_int2(int2, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -35,17 +35,17 @@ AS
     FUNCTION        5       gin_compare_prefix_int2(int2,int2,int2, internal),
 STORAGE         int2;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_int4(int4, internal)
+CREATE FUNCTION gin_extract_value_int4(int4, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_int4(int4, int4, int2, internal)
+CREATE FUNCTION gin_compare_prefix_int4(int4, int4, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_int4(int4, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_int4(int4, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -65,17 +65,17 @@ AS
     FUNCTION        5       gin_compare_prefix_int4(int4,int4,int2, internal),
 STORAGE         int4;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_int8(int8, internal)
+CREATE FUNCTION gin_extract_value_int8(int8, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_int8(int8, int8, int2, internal)
+CREATE FUNCTION gin_compare_prefix_int8(int8, int8, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_int8(int8, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_int8(int8, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -95,17 +95,17 @@ AS
     FUNCTION        5       gin_compare_prefix_int8(int8,int8,int2, internal),
 STORAGE         int8;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_float4(float4, internal)
+CREATE FUNCTION gin_extract_value_float4(float4, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_float4(float4, float4, int2, internal)
+CREATE FUNCTION gin_compare_prefix_float4(float4, float4, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_float4(float4, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_float4(float4, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -125,17 +125,17 @@ AS
     FUNCTION        5       gin_compare_prefix_float4(float4,float4,int2, internal),
 STORAGE         float4;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_float8(float8, internal)
+CREATE FUNCTION gin_extract_value_float8(float8, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_float8(float8, float8, int2, internal)
+CREATE FUNCTION gin_compare_prefix_float8(float8, float8, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_float8(float8, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_float8(float8, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -155,17 +155,17 @@ AS
     FUNCTION        5       gin_compare_prefix_float8(float8,float8,int2, internal),
 STORAGE         float8;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_money(money, internal)
+CREATE FUNCTION gin_extract_value_money(money, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_money(money, money, int2, internal)
+CREATE FUNCTION gin_compare_prefix_money(money, money, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_money(money, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_money(money, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -185,17 +185,17 @@ AS
     FUNCTION        5       gin_compare_prefix_money(money,money,int2, internal),
 STORAGE         money;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_oid(oid, internal)
+CREATE FUNCTION gin_extract_value_oid(oid, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_oid(oid, oid, int2, internal)
+CREATE FUNCTION gin_compare_prefix_oid(oid, oid, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_oid(oid, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_oid(oid, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -215,17 +215,17 @@ AS
     FUNCTION        5       gin_compare_prefix_oid(oid,oid,int2, internal),
 STORAGE         oid;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_timestamp(timestamp, internal)
+CREATE FUNCTION gin_extract_value_timestamp(timestamp, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_timestamp(timestamp, timestamp, int2, internal)
+CREATE FUNCTION gin_compare_prefix_timestamp(timestamp, timestamp, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_timestamp(timestamp, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_timestamp(timestamp, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -245,17 +245,17 @@ AS
     FUNCTION        5       gin_compare_prefix_timestamp(timestamp,timestamp,int2, internal),
 STORAGE         timestamp;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_timestamptz(timestamptz, internal)
+CREATE FUNCTION gin_extract_value_timestamptz(timestamptz, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_timestamptz(timestamptz, timestamptz, int2, internal)
+CREATE FUNCTION gin_compare_prefix_timestamptz(timestamptz, timestamptz, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_timestamptz(timestamptz, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_timestamptz(timestamptz, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -275,17 +275,17 @@ AS
     FUNCTION        5       gin_compare_prefix_timestamptz(timestamptz,timestamptz,int2, internal),
 STORAGE         timestamptz;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_time(time, internal)
+CREATE FUNCTION gin_extract_value_time(time, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_time(time, time, int2, internal)
+CREATE FUNCTION gin_compare_prefix_time(time, time, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_time(time, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_time(time, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -305,17 +305,17 @@ AS
     FUNCTION        5       gin_compare_prefix_time(time,time,int2, internal),
 STORAGE         time;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_timetz(timetz, internal)
+CREATE FUNCTION gin_extract_value_timetz(timetz, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_timetz(timetz, timetz, int2, internal)
+CREATE FUNCTION gin_compare_prefix_timetz(timetz, timetz, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_timetz(timetz, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_timetz(timetz, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -335,17 +335,17 @@ AS
     FUNCTION        5       gin_compare_prefix_timetz(timetz,timetz,int2, internal),
 STORAGE         timetz;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_date(date, internal)
+CREATE FUNCTION gin_extract_value_date(date, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_date(date, date, int2, internal)
+CREATE FUNCTION gin_compare_prefix_date(date, date, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_date(date, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_date(date, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -365,17 +365,17 @@ AS
     FUNCTION        5       gin_compare_prefix_date(date,date,int2, internal),
 STORAGE         date;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_interval(interval, internal)
+CREATE FUNCTION gin_extract_value_interval(interval, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_interval(interval, interval, int2, internal)
+CREATE FUNCTION gin_compare_prefix_interval(interval, interval, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_interval(interval, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_interval(interval, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -395,17 +395,17 @@ AS
     FUNCTION        5       gin_compare_prefix_interval(interval,interval,int2, internal),
 STORAGE         interval;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_macaddr(macaddr, internal)
+CREATE FUNCTION gin_extract_value_macaddr(macaddr, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_macaddr(macaddr, macaddr, int2, internal)
+CREATE FUNCTION gin_compare_prefix_macaddr(macaddr, macaddr, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_macaddr(macaddr, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_macaddr(macaddr, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -425,17 +425,17 @@ AS
     FUNCTION        5       gin_compare_prefix_macaddr(macaddr,macaddr,int2, internal),
 STORAGE         macaddr;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_inet(inet, internal)
+CREATE FUNCTION gin_extract_value_inet(inet, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_inet(inet, inet, int2, internal)
+CREATE FUNCTION gin_compare_prefix_inet(inet, inet, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_inet(inet, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_inet(inet, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -455,17 +455,17 @@ AS
     FUNCTION        5       gin_compare_prefix_inet(inet,inet,int2, internal),
 STORAGE         inet;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_cidr(cidr, internal)
+CREATE FUNCTION gin_extract_value_cidr(cidr, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_cidr(cidr, cidr, int2, internal)
+CREATE FUNCTION gin_compare_prefix_cidr(cidr, cidr, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_cidr(cidr, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_cidr(cidr, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -485,17 +485,17 @@ AS
     FUNCTION        5       gin_compare_prefix_cidr(cidr,cidr,int2, internal),
 STORAGE         cidr;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_text(text, internal)
+CREATE FUNCTION gin_extract_value_text(text, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_text(text, text, int2, internal)
+CREATE FUNCTION gin_compare_prefix_text(text, text, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_text(text, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_text(text, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -530,17 +530,17 @@ AS
     FUNCTION        5       gin_compare_prefix_text(text,text,int2, internal),
 STORAGE         varchar;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_char("char", internal)
+CREATE FUNCTION gin_extract_value_char("char", internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_char("char", "char", int2, internal)
+CREATE FUNCTION gin_compare_prefix_char("char", "char", int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_char("char", internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_char("char", internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -560,17 +560,17 @@ AS
     FUNCTION        5       gin_compare_prefix_char("char","char",int2, internal),
 STORAGE         "char";
 
-CREATE OR REPLACE FUNCTION gin_extract_value_bytea(bytea, internal)
+CREATE FUNCTION gin_extract_value_bytea(bytea, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_bytea(bytea, bytea, int2, internal)
+CREATE FUNCTION gin_compare_prefix_bytea(bytea, bytea, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_bytea(bytea, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_bytea(bytea, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -590,17 +590,17 @@ AS
     FUNCTION        5       gin_compare_prefix_bytea(bytea,bytea,int2, internal),
 STORAGE         bytea;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_bit(bit, internal)
+CREATE FUNCTION gin_extract_value_bit(bit, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_bit(bit, bit, int2, internal)
+CREATE FUNCTION gin_compare_prefix_bit(bit, bit, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_bit(bit, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_bit(bit, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -620,17 +620,17 @@ AS
     FUNCTION        5       gin_compare_prefix_bit(bit,bit,int2, internal),
 STORAGE         bit;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_varbit(varbit, internal)
+CREATE FUNCTION gin_extract_value_varbit(varbit, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_varbit(varbit, varbit, int2, internal)
+CREATE FUNCTION gin_compare_prefix_varbit(varbit, varbit, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_varbit(varbit, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_varbit(varbit, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -650,22 +650,22 @@ AS
     FUNCTION        5       gin_compare_prefix_varbit(varbit,varbit,int2, internal),
 STORAGE         varbit;
 
-CREATE OR REPLACE FUNCTION gin_extract_value_numeric(numeric, internal)
+CREATE FUNCTION gin_extract_value_numeric(numeric, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_compare_prefix_numeric(numeric, numeric, int2, internal)
+CREATE FUNCTION gin_compare_prefix_numeric(numeric, numeric, int2, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_numeric(numeric, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_query_numeric(numeric, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION gin_numeric_cmp(numeric, numeric)
+CREATE FUNCTION gin_numeric_cmp(numeric, numeric)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
diff --git a/contrib/btree_gist/btree_gist--1.0.sql b/contrib/btree_gist/btree_gist--1.0.sql
index ab6c8c3936e0d8e613fa1692d5c4a67694154965..f1866f25ed5a957a6f8be74bb9b474a81cb2dd98 100644
--- a/contrib/btree_gist/btree_gist--1.0.sql
+++ b/contrib/btree_gist/btree_gist--1.0.sql
@@ -1,11 +1,11 @@
 /* contrib/btree_gist/btree_gist--1.0.sql */
 
-CREATE OR REPLACE FUNCTION gbtreekey4_in(cstring)
+CREATE FUNCTION gbtreekey4_in(cstring)
 RETURNS gbtreekey4
 AS 'MODULE_PATHNAME', 'gbtreekey_in'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbtreekey4_out(gbtreekey4)
+CREATE FUNCTION gbtreekey4_out(gbtreekey4)
 RETURNS cstring
 AS 'MODULE_PATHNAME', 'gbtreekey_out'
 LANGUAGE C IMMUTABLE STRICT;
@@ -16,12 +16,12 @@ CREATE TYPE gbtreekey4 (
 	OUTPUT = gbtreekey4_out
 );
 
-CREATE OR REPLACE FUNCTION gbtreekey8_in(cstring)
+CREATE FUNCTION gbtreekey8_in(cstring)
 RETURNS gbtreekey8
 AS 'MODULE_PATHNAME', 'gbtreekey_in'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbtreekey8_out(gbtreekey8)
+CREATE FUNCTION gbtreekey8_out(gbtreekey8)
 RETURNS cstring
 AS 'MODULE_PATHNAME', 'gbtreekey_out'
 LANGUAGE C IMMUTABLE STRICT;
@@ -32,12 +32,12 @@ CREATE TYPE gbtreekey8 (
 	OUTPUT = gbtreekey8_out
 );
 
-CREATE OR REPLACE FUNCTION gbtreekey16_in(cstring)
+CREATE FUNCTION gbtreekey16_in(cstring)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME', 'gbtreekey_in'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbtreekey16_out(gbtreekey16)
+CREATE FUNCTION gbtreekey16_out(gbtreekey16)
 RETURNS cstring
 AS 'MODULE_PATHNAME', 'gbtreekey_out'
 LANGUAGE C IMMUTABLE STRICT;
@@ -48,12 +48,12 @@ CREATE TYPE gbtreekey16 (
 	OUTPUT = gbtreekey16_out
 );
 
-CREATE OR REPLACE FUNCTION gbtreekey32_in(cstring)
+CREATE FUNCTION gbtreekey32_in(cstring)
 RETURNS gbtreekey32
 AS 'MODULE_PATHNAME', 'gbtreekey_in'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbtreekey32_out(gbtreekey32)
+CREATE FUNCTION gbtreekey32_out(gbtreekey32)
 RETURNS cstring
 AS 'MODULE_PATHNAME', 'gbtreekey_out'
 LANGUAGE C IMMUTABLE STRICT;
@@ -64,12 +64,12 @@ CREATE TYPE gbtreekey32 (
 	OUTPUT = gbtreekey32_out
 );
 
-CREATE OR REPLACE FUNCTION gbtreekey_var_in(cstring)
+CREATE FUNCTION gbtreekey_var_in(cstring)
 RETURNS gbtreekey_var
 AS 'MODULE_PATHNAME', 'gbtreekey_in'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbtreekey_var_out(gbtreekey_var)
+CREATE FUNCTION gbtreekey_var_out(gbtreekey_var)
 RETURNS cstring
 AS 'MODULE_PATHNAME', 'gbtreekey_out'
 LANGUAGE C IMMUTABLE STRICT;
@@ -91,42 +91,42 @@ CREATE TYPE gbtreekey_var (
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_oid_consistent(internal,oid,int2,oid,internal)
+CREATE FUNCTION gbt_oid_consistent(internal,oid,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_oid_compress(internal)
+CREATE FUNCTION gbt_oid_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_decompress(internal)
+CREATE FUNCTION gbt_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_var_decompress(internal)
+CREATE FUNCTION gbt_var_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_oid_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_oid_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_oid_picksplit(internal, internal)
+CREATE FUNCTION gbt_oid_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_oid_union(bytea, internal)
+CREATE FUNCTION gbt_oid_union(bytea, internal)
 RETURNS gbtreekey8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_oid_same(internal, internal, internal)
+CREATE FUNCTION gbt_oid_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -159,32 +159,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_int2_consistent(internal,int2,int2,oid,internal)
+CREATE FUNCTION gbt_int2_consistent(internal,int2,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int2_compress(internal)
+CREATE FUNCTION gbt_int2_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int2_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_int2_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int2_picksplit(internal, internal)
+CREATE FUNCTION gbt_int2_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int2_union(bytea, internal)
+CREATE FUNCTION gbt_int2_union(bytea, internal)
 RETURNS gbtreekey4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int2_same(internal, internal, internal)
+CREATE FUNCTION gbt_int2_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -216,32 +216,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_int4_consistent(internal,int4,int2,oid,internal)
+CREATE FUNCTION gbt_int4_consistent(internal,int4,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int4_compress(internal)
+CREATE FUNCTION gbt_int4_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int4_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_int4_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int4_picksplit(internal, internal)
+CREATE FUNCTION gbt_int4_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int4_union(bytea, internal)
+CREATE FUNCTION gbt_int4_union(bytea, internal)
 RETURNS gbtreekey8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int4_same(internal, internal, internal)
+CREATE FUNCTION gbt_int4_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -273,32 +273,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_int8_consistent(internal,int8,int2,oid,internal)
+CREATE FUNCTION gbt_int8_consistent(internal,int8,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int8_compress(internal)
+CREATE FUNCTION gbt_int8_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int8_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_int8_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int8_picksplit(internal, internal)
+CREATE FUNCTION gbt_int8_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int8_union(bytea, internal)
+CREATE FUNCTION gbt_int8_union(bytea, internal)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_int8_same(internal, internal, internal)
+CREATE FUNCTION gbt_int8_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -331,32 +331,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_float4_consistent(internal,float4,int2,oid,internal)
+CREATE FUNCTION gbt_float4_consistent(internal,float4,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float4_compress(internal)
+CREATE FUNCTION gbt_float4_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float4_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_float4_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float4_picksplit(internal, internal)
+CREATE FUNCTION gbt_float4_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float4_union(bytea, internal)
+CREATE FUNCTION gbt_float4_union(bytea, internal)
 RETURNS gbtreekey8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float4_same(internal, internal, internal)
+CREATE FUNCTION gbt_float4_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -391,32 +391,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_float8_consistent(internal,float8,int2,oid,internal)
+CREATE FUNCTION gbt_float8_consistent(internal,float8,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float8_compress(internal)
+CREATE FUNCTION gbt_float8_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float8_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_float8_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float8_picksplit(internal, internal)
+CREATE FUNCTION gbt_float8_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float8_union(bytea, internal)
+CREATE FUNCTION gbt_float8_union(bytea, internal)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_float8_same(internal, internal, internal)
+CREATE FUNCTION gbt_float8_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -449,42 +449,42 @@ AS
 --
 --
 
-CREATE OR REPLACE FUNCTION gbt_ts_consistent(internal,timestamp,int2,oid,internal)
+CREATE FUNCTION gbt_ts_consistent(internal,timestamp,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_tstz_consistent(internal,timestamptz,int2,oid,internal)
+CREATE FUNCTION gbt_tstz_consistent(internal,timestamptz,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_ts_compress(internal)
+CREATE FUNCTION gbt_ts_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_tstz_compress(internal)
+CREATE FUNCTION gbt_tstz_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_ts_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_ts_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_ts_picksplit(internal, internal)
+CREATE FUNCTION gbt_ts_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_ts_union(bytea, internal)
+CREATE FUNCTION gbt_ts_union(bytea, internal)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_ts_same(internal, internal, internal)
+CREATE FUNCTION gbt_ts_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -537,42 +537,42 @@ AS
 --
 --
 
-CREATE OR REPLACE FUNCTION gbt_time_consistent(internal,time,int2,oid,internal)
+CREATE FUNCTION gbt_time_consistent(internal,time,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_timetz_consistent(internal,timetz,int2,oid,internal)
+CREATE FUNCTION gbt_timetz_consistent(internal,timetz,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_time_compress(internal)
+CREATE FUNCTION gbt_time_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_timetz_compress(internal)
+CREATE FUNCTION gbt_timetz_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_time_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_time_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_time_picksplit(internal, internal)
+CREATE FUNCTION gbt_time_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_time_union(bytea, internal)
+CREATE FUNCTION gbt_time_union(bytea, internal)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_time_same(internal, internal, internal)
+CREATE FUNCTION gbt_time_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -623,32 +623,32 @@ AS
 --
 --
 
-CREATE OR REPLACE FUNCTION gbt_date_consistent(internal,date,int2,oid,internal)
+CREATE FUNCTION gbt_date_consistent(internal,date,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_date_compress(internal)
+CREATE FUNCTION gbt_date_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_date_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_date_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_date_picksplit(internal, internal)
+CREATE FUNCTION gbt_date_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_date_union(bytea, internal)
+CREATE FUNCTION gbt_date_union(bytea, internal)
 RETURNS gbtreekey8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_date_same(internal, internal, internal)
+CREATE FUNCTION gbt_date_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -681,37 +681,37 @@ AS
 --
 --
 
-CREATE OR REPLACE FUNCTION gbt_intv_consistent(internal,interval,int2,oid,internal)
+CREATE FUNCTION gbt_intv_consistent(internal,interval,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_intv_compress(internal)
+CREATE FUNCTION gbt_intv_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_intv_decompress(internal)
+CREATE FUNCTION gbt_intv_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_intv_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_intv_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_intv_picksplit(internal, internal)
+CREATE FUNCTION gbt_intv_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_intv_union(bytea, internal)
+CREATE FUNCTION gbt_intv_union(bytea, internal)
 RETURNS gbtreekey32
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_intv_same(internal, internal, internal)
+CREATE FUNCTION gbt_intv_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -743,32 +743,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_cash_consistent(internal,money,int2,oid,internal)
+CREATE FUNCTION gbt_cash_consistent(internal,money,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_cash_compress(internal)
+CREATE FUNCTION gbt_cash_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_cash_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_cash_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_cash_picksplit(internal, internal)
+CREATE FUNCTION gbt_cash_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_cash_union(bytea, internal)
+CREATE FUNCTION gbt_cash_union(bytea, internal)
 RETURNS gbtreekey8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_cash_same(internal, internal, internal)
+CREATE FUNCTION gbt_cash_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -800,32 +800,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_macad_consistent(internal,macaddr,int2,oid,internal)
+CREATE FUNCTION gbt_macad_consistent(internal,macaddr,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_macad_compress(internal)
+CREATE FUNCTION gbt_macad_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_macad_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_macad_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_macad_picksplit(internal, internal)
+CREATE FUNCTION gbt_macad_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_macad_union(bytea, internal)
+CREATE FUNCTION gbt_macad_union(bytea, internal)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_macad_same(internal, internal, internal)
+CREATE FUNCTION gbt_macad_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -859,42 +859,42 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_text_consistent(internal,text,int2,oid,internal)
+CREATE FUNCTION gbt_text_consistent(internal,text,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bpchar_consistent(internal,bpchar,int2,oid,internal)
+CREATE FUNCTION gbt_bpchar_consistent(internal,bpchar,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_text_compress(internal)
+CREATE FUNCTION gbt_text_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bpchar_compress(internal)
+CREATE FUNCTION gbt_bpchar_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_text_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_text_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_text_picksplit(internal, internal)
+CREATE FUNCTION gbt_text_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_text_union(bytea, internal)
+CREATE FUNCTION gbt_text_union(bytea, internal)
 RETURNS gbtreekey_var
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_text_same(internal, internal, internal)
+CREATE FUNCTION gbt_text_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -947,32 +947,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_bytea_consistent(internal,bytea,int2,oid,internal)
+CREATE FUNCTION gbt_bytea_consistent(internal,bytea,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bytea_compress(internal)
+CREATE FUNCTION gbt_bytea_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bytea_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_bytea_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bytea_picksplit(internal, internal)
+CREATE FUNCTION gbt_bytea_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bytea_union(bytea, internal)
+CREATE FUNCTION gbt_bytea_union(bytea, internal)
 RETURNS gbtreekey_var
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bytea_same(internal, internal, internal)
+CREATE FUNCTION gbt_bytea_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -1005,32 +1005,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_numeric_consistent(internal,numeric,int2,oid,internal)
+CREATE FUNCTION gbt_numeric_consistent(internal,numeric,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_numeric_compress(internal)
+CREATE FUNCTION gbt_numeric_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_numeric_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_numeric_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_numeric_picksplit(internal, internal)
+CREATE FUNCTION gbt_numeric_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_numeric_union(bytea, internal)
+CREATE FUNCTION gbt_numeric_union(bytea, internal)
 RETURNS gbtreekey_var
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_numeric_same(internal, internal, internal)
+CREATE FUNCTION gbt_numeric_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -1061,32 +1061,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_bit_consistent(internal,bit,int2,oid,internal)
+CREATE FUNCTION gbt_bit_consistent(internal,bit,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bit_compress(internal)
+CREATE FUNCTION gbt_bit_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bit_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_bit_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bit_picksplit(internal, internal)
+CREATE FUNCTION gbt_bit_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bit_union(bytea, internal)
+CREATE FUNCTION gbt_bit_union(bytea, internal)
 RETURNS gbtreekey_var
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_bit_same(internal, internal, internal)
+CREATE FUNCTION gbt_bit_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -1140,32 +1140,32 @@ AS
 --
 --
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gbt_inet_consistent(internal,inet,int2,oid,internal)
+CREATE FUNCTION gbt_inet_consistent(internal,inet,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_inet_compress(internal)
+CREATE FUNCTION gbt_inet_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_inet_penalty(internal,internal,internal)
+CREATE FUNCTION gbt_inet_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_inet_picksplit(internal, internal)
+CREATE FUNCTION gbt_inet_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_inet_union(bytea, internal)
+CREATE FUNCTION gbt_inet_union(bytea, internal)
 RETURNS gbtreekey16
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gbt_inet_same(internal, internal, internal)
+CREATE FUNCTION gbt_inet_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/chkpass/chkpass--1.0.sql b/contrib/chkpass/chkpass--1.0.sql
index aad74683f713641d9f15c1f804e2ed25abae90fb..755fee3bc3fc81a35181a2a9fc3bc4f10499b357 100644
--- a/contrib/chkpass/chkpass--1.0.sql
+++ b/contrib/chkpass/chkpass--1.0.sql
@@ -4,12 +4,12 @@
 --	Input and output functions and the type itself:
 --
 
-CREATE OR REPLACE FUNCTION chkpass_in(cstring)
+CREATE FUNCTION chkpass_in(cstring)
 	RETURNS chkpass
 	AS 'MODULE_PATHNAME'
 	LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION chkpass_out(chkpass)
+CREATE FUNCTION chkpass_out(chkpass)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE C STRICT;
@@ -20,7 +20,7 @@ CREATE TYPE chkpass (
 	output = chkpass_out
 );
 
-CREATE OR REPLACE FUNCTION raw(chkpass)
+CREATE FUNCTION raw(chkpass)
 	RETURNS text
 	AS 'MODULE_PATHNAME', 'chkpass_rout'
 	LANGUAGE C STRICT;
@@ -29,12 +29,12 @@ CREATE OR REPLACE FUNCTION raw(chkpass)
 --	The various boolean tests:
 --
 
-CREATE OR REPLACE FUNCTION eq(chkpass, text)
+CREATE FUNCTION eq(chkpass, text)
 	RETURNS bool
 	AS 'MODULE_PATHNAME', 'chkpass_eq'
 	LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ne(chkpass, text)
+CREATE FUNCTION ne(chkpass, text)
 	RETURNS bool
 	AS 'MODULE_PATHNAME', 'chkpass_ne'
 	LANGUAGE C STRICT;
diff --git a/contrib/citext/citext--1.0.sql b/contrib/citext/citext--1.0.sql
index 13cff8134a45911b529962e0f804b0bcde25718e..2760f7e08d9071357a6e0d45184435e5491ee130 100644
--- a/contrib/citext/citext--1.0.sql
+++ b/contrib/citext/citext--1.0.sql
@@ -16,22 +16,22 @@ CREATE TYPE citext;
 --
 --  Input and output functions.
 --
-CREATE OR REPLACE FUNCTION citextin(cstring)
+CREATE FUNCTION citextin(cstring)
 RETURNS citext
 AS 'textin'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citextout(citext)
+CREATE FUNCTION citextout(citext)
 RETURNS cstring
 AS 'textout'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citextrecv(internal)
+CREATE FUNCTION citextrecv(internal)
 RETURNS citext
 AS 'textrecv'
 LANGUAGE internal STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citextsend(citext)
+CREATE FUNCTION citextsend(citext)
 RETURNS bytea
 AS 'textsend'
 LANGUAGE internal STABLE STRICT;
@@ -58,17 +58,17 @@ CREATE TYPE citext (
 -- automatically kick in.
 --
 
-CREATE OR REPLACE FUNCTION citext(bpchar)
+CREATE FUNCTION citext(bpchar)
 RETURNS citext
 AS 'rtrim1'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext(boolean)
+CREATE FUNCTION citext(boolean)
 RETURNS citext
 AS 'booltext'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext(inet)
+CREATE FUNCTION citext(inet)
 RETURNS citext
 AS 'network_show'
 LANGUAGE internal IMMUTABLE STRICT;
@@ -90,32 +90,32 @@ CREATE CAST (inet AS citext)    WITH FUNCTION citext(inet)    AS ASSIGNMENT;
 -- Operator Functions.
 --
 
-CREATE OR REPLACE FUNCTION citext_eq( citext, citext )
+CREATE FUNCTION citext_eq( citext, citext )
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext_ne( citext, citext )
+CREATE FUNCTION citext_ne( citext, citext )
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext_lt( citext, citext )
+CREATE FUNCTION citext_lt( citext, citext )
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext_le( citext, citext )
+CREATE FUNCTION citext_le( citext, citext )
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext_gt( citext, citext )
+CREATE FUNCTION citext_gt( citext, citext )
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext_ge( citext, citext )
+CREATE FUNCTION citext_ge( citext, citext )
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -190,12 +190,12 @@ CREATE OPERATOR > (
 -- Support functions for indexing.
 --
 
-CREATE OR REPLACE FUNCTION citext_cmp(citext, citext)
+CREATE FUNCTION citext_cmp(citext, citext)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION citext_hash(citext)
+CREATE FUNCTION citext_hash(citext)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -226,12 +226,12 @@ DEFAULT FOR TYPE citext USING hash AS
 -- Aggregates.
 --
 
-CREATE OR REPLACE FUNCTION citext_smaller(citext, citext)
+CREATE FUNCTION citext_smaller(citext, citext)
 RETURNS citext
 AS 'MODULE_PATHNAME'
 LANGUAGE 'C' IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION citext_larger(citext, citext)
+CREATE FUNCTION citext_larger(citext, citext)
 RETURNS citext
 AS 'MODULE_PATHNAME'
 LANGUAGE 'C' IMMUTABLE STRICT;
@@ -252,19 +252,19 @@ CREATE AGGREGATE max(citext)  (
 -- CITEXT pattern matching.
 --
 
-CREATE OR REPLACE FUNCTION texticlike(citext, citext)
+CREATE FUNCTION texticlike(citext, citext)
 RETURNS bool AS 'texticlike'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION texticnlike(citext, citext)
+CREATE FUNCTION texticnlike(citext, citext)
 RETURNS bool AS 'texticnlike'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION texticregexeq(citext, citext)
+CREATE FUNCTION texticregexeq(citext, citext)
 RETURNS bool AS 'texticregexeq'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION texticregexne(citext, citext)
+CREATE FUNCTION texticregexne(citext, citext)
 RETURNS bool AS 'texticregexne'
 LANGUAGE internal IMMUTABLE STRICT;
 
@@ -344,19 +344,19 @@ CREATE OPERATOR !~~* (
 -- Matching citext to text.
 --
 
-CREATE OR REPLACE FUNCTION texticlike(citext, text)
+CREATE FUNCTION texticlike(citext, text)
 RETURNS bool AS 'texticlike'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION texticnlike(citext, text)
+CREATE FUNCTION texticnlike(citext, text)
 RETURNS bool AS 'texticnlike'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION texticregexeq(citext, text)
+CREATE FUNCTION texticregexeq(citext, text)
 RETURNS bool AS 'texticregexeq'
 LANGUAGE internal IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION texticregexne(citext, text)
+CREATE FUNCTION texticregexne(citext, text)
 RETURNS bool AS 'texticregexne'
 LANGUAGE internal IMMUTABLE STRICT;
 
@@ -437,50 +437,50 @@ CREATE OPERATOR !~~* (
 -- XXX TODO Ideally these would be implemented in C.
 --
 
-CREATE OR REPLACE FUNCTION regexp_matches( citext, citext ) RETURNS TEXT[] AS $$
+CREATE FUNCTION regexp_matches( citext, citext ) RETURNS TEXT[] AS $$
     SELECT pg_catalog.regexp_matches( $1::pg_catalog.text, $2::pg_catalog.text, 'i' );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_matches( citext, citext, text ) RETURNS TEXT[] AS $$
+CREATE FUNCTION regexp_matches( citext, citext, text ) RETURNS TEXT[] AS $$
     SELECT pg_catalog.regexp_matches( $1::pg_catalog.text, $2::pg_catalog.text, CASE WHEN pg_catalog.strpos($3, 'c') = 0 THEN  $3 || 'i' ELSE $3 END );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_replace( citext, citext, text ) returns TEXT AS $$
+CREATE FUNCTION regexp_replace( citext, citext, text ) returns TEXT AS $$
     SELECT pg_catalog.regexp_replace( $1::pg_catalog.text, $2::pg_catalog.text, $3, 'i');
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_replace( citext, citext, text, text ) returns TEXT AS $$
+CREATE FUNCTION regexp_replace( citext, citext, text, text ) returns TEXT AS $$
     SELECT pg_catalog.regexp_replace( $1::pg_catalog.text, $2::pg_catalog.text, $3, CASE WHEN pg_catalog.strpos($4, 'c') = 0 THEN  $4 || 'i' ELSE $4 END);
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_split_to_array( citext, citext ) RETURNS TEXT[] AS $$
+CREATE FUNCTION regexp_split_to_array( citext, citext ) RETURNS TEXT[] AS $$
     SELECT pg_catalog.regexp_split_to_array( $1::pg_catalog.text, $2::pg_catalog.text, 'i' );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_split_to_array( citext, citext, text ) RETURNS TEXT[] AS $$
+CREATE FUNCTION regexp_split_to_array( citext, citext, text ) RETURNS TEXT[] AS $$
     SELECT pg_catalog.regexp_split_to_array( $1::pg_catalog.text, $2::pg_catalog.text, CASE WHEN pg_catalog.strpos($3, 'c') = 0 THEN  $3 || 'i' ELSE $3 END );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_split_to_table( citext, citext ) RETURNS SETOF TEXT AS $$
+CREATE FUNCTION regexp_split_to_table( citext, citext ) RETURNS SETOF TEXT AS $$
     SELECT pg_catalog.regexp_split_to_table( $1::pg_catalog.text, $2::pg_catalog.text, 'i' );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION regexp_split_to_table( citext, citext, text ) RETURNS SETOF TEXT AS $$
+CREATE FUNCTION regexp_split_to_table( citext, citext, text ) RETURNS SETOF TEXT AS $$
     SELECT pg_catalog.regexp_split_to_table( $1::pg_catalog.text, $2::pg_catalog.text, CASE WHEN pg_catalog.strpos($3, 'c') = 0 THEN  $3 || 'i' ELSE $3 END );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION strpos( citext, citext ) RETURNS INT AS $$
+CREATE FUNCTION strpos( citext, citext ) RETURNS INT AS $$
     SELECT pg_catalog.strpos( pg_catalog.lower( $1::pg_catalog.text ), pg_catalog.lower( $2::pg_catalog.text ) );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION replace( citext, citext, citext ) RETURNS TEXT AS $$
+CREATE FUNCTION replace( citext, citext, citext ) RETURNS TEXT AS $$
     SELECT pg_catalog.regexp_replace( $1::pg_catalog.text, pg_catalog.regexp_replace($2::pg_catalog.text, '([^a-zA-Z_0-9])', E'\\\\\\1', 'g'), $3::pg_catalog.text, 'gi' );
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION split_part( citext, citext, int ) RETURNS TEXT AS $$
+CREATE FUNCTION split_part( citext, citext, int ) RETURNS TEXT AS $$
     SELECT (pg_catalog.regexp_split_to_array( $1::pg_catalog.text, pg_catalog.regexp_replace($2::pg_catalog.text, '([^a-zA-Z_0-9])', E'\\\\\\1', 'g'), 'i'))[$3];
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION translate( citext, citext, text ) RETURNS TEXT AS $$
+CREATE FUNCTION translate( citext, citext, text ) RETURNS TEXT AS $$
     SELECT pg_catalog.translate( pg_catalog.translate( $1::pg_catalog.text, pg_catalog.lower($2::pg_catalog.text), $3), pg_catalog.upper($2::pg_catalog.text), $3);
 $$ LANGUAGE SQL IMMUTABLE STRICT;
diff --git a/contrib/cube/cube--1.0.sql b/contrib/cube/cube--1.0.sql
index 18d69a548823a1c495310f89671be33a7f4be3c4..ee9febe005315bf13e93a9ef216a7411fc13a445 100644
--- a/contrib/cube/cube--1.0.sql
+++ b/contrib/cube/cube--1.0.sql
@@ -2,20 +2,20 @@
 
 -- Create the user-defined type for N-dimensional boxes
 
-CREATE OR REPLACE FUNCTION cube_in(cstring)
+CREATE FUNCTION cube_in(cstring)
 RETURNS cube
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube(float8[], float8[]) RETURNS cube
+CREATE FUNCTION cube(float8[], float8[]) RETURNS cube
 AS 'MODULE_PATHNAME', 'cube_a_f8_f8'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube(float8[]) RETURNS cube
+CREATE FUNCTION cube(float8[]) RETURNS cube
 AS 'MODULE_PATHNAME', 'cube_a_f8'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube_out(cube)
+CREATE FUNCTION cube_out(cube)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -35,70 +35,70 @@ COMMENT ON TYPE cube IS 'multi-dimensional cube ''(FLOAT-1, FLOAT-2, ..., FLOAT-
 
 -- Comparison methods
 
-CREATE OR REPLACE FUNCTION cube_eq(cube, cube)
+CREATE FUNCTION cube_eq(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_eq(cube, cube) IS 'same as';
 
-CREATE OR REPLACE FUNCTION cube_ne(cube, cube)
+CREATE FUNCTION cube_ne(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_ne(cube, cube) IS 'different';
 
-CREATE OR REPLACE FUNCTION cube_lt(cube, cube)
+CREATE FUNCTION cube_lt(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_lt(cube, cube) IS 'lower than';
 
-CREATE OR REPLACE FUNCTION cube_gt(cube, cube)
+CREATE FUNCTION cube_gt(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_gt(cube, cube) IS 'greater than';
 
-CREATE OR REPLACE FUNCTION cube_le(cube, cube)
+CREATE FUNCTION cube_le(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_le(cube, cube) IS 'lower than or equal to';
 
-CREATE OR REPLACE FUNCTION cube_ge(cube, cube)
+CREATE FUNCTION cube_ge(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_ge(cube, cube) IS 'greater than or equal to';
 
-CREATE OR REPLACE FUNCTION cube_cmp(cube, cube)
+CREATE FUNCTION cube_cmp(cube, cube)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_cmp(cube, cube) IS 'btree comparison function';
 
-CREATE OR REPLACE FUNCTION cube_contains(cube, cube)
+CREATE FUNCTION cube_contains(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_contains(cube, cube) IS 'contains';
 
-CREATE OR REPLACE FUNCTION cube_contained(cube, cube)
+CREATE FUNCTION cube_contained(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 COMMENT ON FUNCTION cube_contained(cube, cube) IS 'contained in';
 
-CREATE OR REPLACE FUNCTION cube_overlap(cube, cube)
+CREATE FUNCTION cube_overlap(cube, cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -107,17 +107,17 @@ COMMENT ON FUNCTION cube_overlap(cube, cube) IS 'overlaps';
 
 -- support routines for indexing
 
-CREATE OR REPLACE FUNCTION cube_union(cube, cube)
+CREATE FUNCTION cube_union(cube, cube)
 RETURNS cube
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube_inter(cube, cube)
+CREATE FUNCTION cube_inter(cube, cube)
 RETURNS cube
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube_size(cube)
+CREATE FUNCTION cube_size(cube)
 RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -125,61 +125,61 @@ LANGUAGE C IMMUTABLE STRICT;
 
 -- Misc N-dimensional functions
 
-CREATE OR REPLACE FUNCTION cube_subset(cube, int4[])
+CREATE FUNCTION cube_subset(cube, int4[])
 RETURNS cube
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 -- proximity routines
 
-CREATE OR REPLACE FUNCTION cube_distance(cube, cube)
+CREATE FUNCTION cube_distance(cube, cube)
 RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 -- Extracting elements functions
 
-CREATE OR REPLACE FUNCTION cube_dim(cube)
+CREATE FUNCTION cube_dim(cube)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube_ll_coord(cube, int4)
+CREATE FUNCTION cube_ll_coord(cube, int4)
 RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube_ur_coord(cube, int4)
+CREATE FUNCTION cube_ur_coord(cube, int4)
 RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube(float8) RETURNS cube
+CREATE FUNCTION cube(float8) RETURNS cube
 AS 'MODULE_PATHNAME', 'cube_f8'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube(float8, float8) RETURNS cube
+CREATE FUNCTION cube(float8, float8) RETURNS cube
 AS 'MODULE_PATHNAME', 'cube_f8_f8'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube(cube, float8) RETURNS cube
+CREATE FUNCTION cube(cube, float8) RETURNS cube
 AS 'MODULE_PATHNAME', 'cube_c_f8'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION cube(cube, float8, float8) RETURNS cube
+CREATE FUNCTION cube(cube, float8, float8) RETURNS cube
 AS 'MODULE_PATHNAME', 'cube_c_f8_f8'
 LANGUAGE C IMMUTABLE STRICT;
 
 -- Test if cube is also a point
 
-CREATE OR REPLACE FUNCTION cube_is_point(cube)
+CREATE FUNCTION cube_is_point(cube)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
 -- Increasing the size of a cube by a radius in at least n dimensions
 
-CREATE OR REPLACE FUNCTION cube_enlarge(cube, float8, int4)
+CREATE FUNCTION cube_enlarge(cube, float8, int4)
 RETURNS cube
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -258,37 +258,37 @@ CREATE OPERATOR ~ (
 
 
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION g_cube_consistent(internal,cube,int,oid,internal)
+CREATE FUNCTION g_cube_consistent(internal,cube,int,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_cube_compress(internal)
+CREATE FUNCTION g_cube_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_cube_decompress(internal)
+CREATE FUNCTION g_cube_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_cube_penalty(internal,internal,internal)
+CREATE FUNCTION g_cube_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_cube_picksplit(internal, internal)
+CREATE FUNCTION g_cube_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_cube_union(internal, internal)
+CREATE FUNCTION g_cube_union(internal, internal)
 RETURNS cube
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_cube_same(cube, cube, internal)
+CREATE FUNCTION g_cube_same(cube, cube, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/dblink/dblink--1.0.sql b/contrib/dblink/dblink--1.0.sql
index e9137828f139fe2ef0e75de9daaa4a934ea92a41..4ac551446198b020c9567fa04e9f1cdb744f0ab7 100644
--- a/contrib/dblink/dblink--1.0.sql
+++ b/contrib/dblink/dblink--1.0.sql
@@ -2,12 +2,12 @@
 
 -- dblink_connect now restricts non-superusers to password
 -- authenticated connections
-CREATE OR REPLACE FUNCTION dblink_connect (text)
+CREATE FUNCTION dblink_connect (text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_connect'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_connect (text, text)
+CREATE FUNCTION dblink_connect (text, text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_connect'
 LANGUAGE C STRICT;
@@ -15,12 +15,12 @@ LANGUAGE C STRICT;
 -- dblink_connect_u allows non-superusers to use
 -- non-password authenticated connections, but initially
 -- privileges are revoked from public
-CREATE OR REPLACE FUNCTION dblink_connect_u (text)
+CREATE FUNCTION dblink_connect_u (text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_connect'
 LANGUAGE C STRICT SECURITY DEFINER;
 
-CREATE OR REPLACE FUNCTION dblink_connect_u (text, text)
+CREATE FUNCTION dblink_connect_u (text, text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_connect'
 LANGUAGE C STRICT SECURITY DEFINER;
@@ -28,179 +28,179 @@ LANGUAGE C STRICT SECURITY DEFINER;
 REVOKE ALL ON FUNCTION dblink_connect_u (text) FROM public;
 REVOKE ALL ON FUNCTION dblink_connect_u (text, text) FROM public;
 
-CREATE OR REPLACE FUNCTION dblink_disconnect ()
+CREATE FUNCTION dblink_disconnect ()
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_disconnect'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_disconnect (text)
+CREATE FUNCTION dblink_disconnect (text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_disconnect'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_open (text, text)
+CREATE FUNCTION dblink_open (text, text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_open'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_open (text, text, boolean)
+CREATE FUNCTION dblink_open (text, text, boolean)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_open'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_open (text, text, text)
+CREATE FUNCTION dblink_open (text, text, text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_open'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_open (text, text, text, boolean)
+CREATE FUNCTION dblink_open (text, text, text, boolean)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_open'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_fetch (text, int)
+CREATE FUNCTION dblink_fetch (text, int)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_fetch'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_fetch (text, int, boolean)
+CREATE FUNCTION dblink_fetch (text, int, boolean)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_fetch'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_fetch (text, text, int)
+CREATE FUNCTION dblink_fetch (text, text, int)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_fetch'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_fetch (text, text, int, boolean)
+CREATE FUNCTION dblink_fetch (text, text, int, boolean)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_fetch'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_close (text)
+CREATE FUNCTION dblink_close (text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_close'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_close (text, boolean)
+CREATE FUNCTION dblink_close (text, boolean)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_close'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_close (text, text)
+CREATE FUNCTION dblink_close (text, text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_close'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_close (text, text, boolean)
+CREATE FUNCTION dblink_close (text, text, boolean)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_close'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink (text, text)
+CREATE FUNCTION dblink (text, text)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_record'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink (text, text, boolean)
+CREATE FUNCTION dblink (text, text, boolean)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_record'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink (text)
+CREATE FUNCTION dblink (text)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_record'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink (text, boolean)
+CREATE FUNCTION dblink (text, boolean)
 RETURNS setof record
 AS 'MODULE_PATHNAME','dblink_record'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_exec (text, text)
+CREATE FUNCTION dblink_exec (text, text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_exec'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_exec (text, text, boolean)
+CREATE FUNCTION dblink_exec (text, text, boolean)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_exec'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_exec (text)
+CREATE FUNCTION dblink_exec (text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_exec'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_exec (text,boolean)
+CREATE FUNCTION dblink_exec (text,boolean)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_exec'
 LANGUAGE C STRICT;
 
 CREATE TYPE dblink_pkey_results AS (position int, colname text);
 
-CREATE OR REPLACE FUNCTION dblink_get_pkey (text)
+CREATE FUNCTION dblink_get_pkey (text)
 RETURNS setof dblink_pkey_results
 AS 'MODULE_PATHNAME','dblink_get_pkey'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_build_sql_insert (text, int2vector, int, _text, _text)
+CREATE FUNCTION dblink_build_sql_insert (text, int2vector, int, _text, _text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_build_sql_insert'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_build_sql_delete (text, int2vector, int, _text)
+CREATE FUNCTION dblink_build_sql_delete (text, int2vector, int, _text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_build_sql_delete'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_build_sql_update (text, int2vector, int, _text, _text)
+CREATE FUNCTION dblink_build_sql_update (text, int2vector, int, _text, _text)
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_build_sql_update'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_current_query ()
+CREATE FUNCTION dblink_current_query ()
 RETURNS text
 AS 'MODULE_PATHNAME','dblink_current_query'
 LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION dblink_send_query(text, text)
+CREATE FUNCTION dblink_send_query(text, text)
 RETURNS int4
 AS 'MODULE_PATHNAME', 'dblink_send_query'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_is_busy(text)
+CREATE FUNCTION dblink_is_busy(text)
 RETURNS int4
 AS 'MODULE_PATHNAME', 'dblink_is_busy'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_get_result(text)
+CREATE FUNCTION dblink_get_result(text)
 RETURNS SETOF record
 AS 'MODULE_PATHNAME', 'dblink_get_result'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_get_result(text, bool)
+CREATE FUNCTION dblink_get_result(text, bool)
 RETURNS SETOF record
 AS 'MODULE_PATHNAME', 'dblink_get_result'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_get_connections()
+CREATE FUNCTION dblink_get_connections()
 RETURNS text[]
 AS 'MODULE_PATHNAME', 'dblink_get_connections'
 LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION dblink_cancel_query(text)
+CREATE FUNCTION dblink_cancel_query(text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'dblink_cancel_query'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_error_message(text)
+CREATE FUNCTION dblink_error_message(text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'dblink_error_message'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_get_notify(
+CREATE FUNCTION dblink_get_notify(
     OUT notify_name TEXT,
     OUT be_pid INT4,
     OUT extra TEXT
@@ -209,7 +209,7 @@ RETURNS setof record
 AS 'MODULE_PATHNAME', 'dblink_get_notify'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dblink_get_notify(
+CREATE FUNCTION dblink_get_notify(
     conname TEXT,
     OUT notify_name TEXT,
     OUT be_pid INT4,
diff --git a/contrib/dict_int/dict_int--1.0.sql b/contrib/dict_int/dict_int--1.0.sql
index a0e2b9af64215a5563d6e697d61534e6eb659040..585a56552d66186245ff9daa5167923734c6d897 100644
--- a/contrib/dict_int/dict_int--1.0.sql
+++ b/contrib/dict_int/dict_int--1.0.sql
@@ -1,11 +1,11 @@
 /* contrib/dict_int/dict_int--1.0.sql */
 
-CREATE OR REPLACE FUNCTION dintdict_init(internal)
+CREATE FUNCTION dintdict_init(internal)
         RETURNS internal
         AS 'MODULE_PATHNAME'
         LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dintdict_lexize(internal, internal, internal, internal)
+CREATE FUNCTION dintdict_lexize(internal, internal, internal, internal)
         RETURNS internal
         AS 'MODULE_PATHNAME'
         LANGUAGE C STRICT;
diff --git a/contrib/dict_xsyn/dict_xsyn--1.0.sql b/contrib/dict_xsyn/dict_xsyn--1.0.sql
index 0b6a21730fdc627fa0664cb67a4343a0d6b35069..30eaff4db5a92ab8ebec7eecf06b47d3fae806c3 100644
--- a/contrib/dict_xsyn/dict_xsyn--1.0.sql
+++ b/contrib/dict_xsyn/dict_xsyn--1.0.sql
@@ -1,11 +1,11 @@
 /* contrib/dict_xsyn/dict_xsyn--1.0.sql */
 
-CREATE OR REPLACE FUNCTION dxsyn_init(internal)
+CREATE FUNCTION dxsyn_init(internal)
         RETURNS internal
         AS 'MODULE_PATHNAME'
         LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION dxsyn_lexize(internal, internal, internal, internal)
+CREATE FUNCTION dxsyn_lexize(internal, internal, internal, internal)
         RETURNS internal
         AS 'MODULE_PATHNAME'
         LANGUAGE C STRICT;
diff --git a/contrib/earthdistance/earthdistance--1.0.sql b/contrib/earthdistance/earthdistance--1.0.sql
index 0a2af648de2c592aee1633360c29f66655eafcfd..71e4025f6f8a96b92edccef40c1953020d9a9cc3 100644
--- a/contrib/earthdistance/earthdistance--1.0.sql
+++ b/contrib/earthdistance/earthdistance--1.0.sql
@@ -4,7 +4,7 @@
 -- place you need to change things for the cube base distance functions
 -- in order to use different units (or a better value for the Earth's radius).
 
-CREATE OR REPLACE FUNCTION earth() RETURNS float8
+CREATE FUNCTION earth() RETURNS float8
 LANGUAGE SQL IMMUTABLE
 AS 'SELECT ''6378168''::float8';
 
@@ -13,7 +13,7 @@ AS 'SELECT ''6378168''::float8';
 -- uncomment the one below. Note that doing this will break the regression
 -- tests.
 --
--- CREATE OR REPLACE FUNCTION earth() RETURNS float8
+-- CREATE FUNCTION earth() RETURNS float8
 -- LANGUAGE SQL IMMUTABLE
 -- AS 'SELECT 180/pi()';
 
@@ -30,43 +30,43 @@ CREATE DOMAIN earth AS cube
   CONSTRAINT on_surface check(abs(cube_distance(value, '(0)'::cube) /
   earth() - 1) < '10e-7'::float8);
 
-CREATE OR REPLACE FUNCTION sec_to_gc(float8)
+CREATE FUNCTION sec_to_gc(float8)
 RETURNS float8
 LANGUAGE SQL
 IMMUTABLE STRICT
 AS 'SELECT CASE WHEN $1 < 0 THEN 0::float8 WHEN $1/(2*earth()) > 1 THEN pi()*earth() ELSE 2*earth()*asin($1/(2*earth())) END';
 
-CREATE OR REPLACE FUNCTION gc_to_sec(float8)
+CREATE FUNCTION gc_to_sec(float8)
 RETURNS float8
 LANGUAGE SQL
 IMMUTABLE STRICT
 AS 'SELECT CASE WHEN $1 < 0 THEN 0::float8 WHEN $1/earth() > pi() THEN 2*earth() ELSE 2*earth()*sin($1/(2*earth())) END';
 
-CREATE OR REPLACE FUNCTION ll_to_earth(float8, float8)
+CREATE FUNCTION ll_to_earth(float8, float8)
 RETURNS earth
 LANGUAGE SQL
 IMMUTABLE STRICT
 AS 'SELECT cube(cube(cube(earth()*cos(radians($1))*cos(radians($2))),earth()*cos(radians($1))*sin(radians($2))),earth()*sin(radians($1)))::earth';
 
-CREATE OR REPLACE FUNCTION latitude(earth)
+CREATE FUNCTION latitude(earth)
 RETURNS float8
 LANGUAGE SQL
 IMMUTABLE STRICT
 AS 'SELECT CASE WHEN cube_ll_coord($1, 3)/earth() < -1 THEN -90::float8 WHEN cube_ll_coord($1, 3)/earth() > 1 THEN 90::float8 ELSE degrees(asin(cube_ll_coord($1, 3)/earth())) END';
 
-CREATE OR REPLACE FUNCTION longitude(earth)
+CREATE FUNCTION longitude(earth)
 RETURNS float8
 LANGUAGE SQL
 IMMUTABLE STRICT
 AS 'SELECT degrees(atan2(cube_ll_coord($1, 2), cube_ll_coord($1, 1)))';
 
-CREATE OR REPLACE FUNCTION earth_distance(earth, earth)
+CREATE FUNCTION earth_distance(earth, earth)
 RETURNS float8
 LANGUAGE SQL
 IMMUTABLE STRICT
 AS 'SELECT sec_to_gc(cube_distance($1, $2))';
 
-CREATE OR REPLACE FUNCTION earth_box(earth, float8)
+CREATE FUNCTION earth_box(earth, float8)
 RETURNS cube
 LANGUAGE SQL
 IMMUTABLE STRICT
@@ -74,7 +74,7 @@ AS 'SELECT cube_enlarge($1, gc_to_sec($2), 3)';
 
 --------------- geo_distance
 
-CREATE OR REPLACE FUNCTION geo_distance (point, point)
+CREATE FUNCTION geo_distance (point, point)
 RETURNS float8
 LANGUAGE C IMMUTABLE STRICT AS 'MODULE_PATHNAME';
 
diff --git a/contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql b/contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql
index 1d27f5c3ddd7da3fb83e9826e283a2b2d9b73a1c..d9b8987adf562ff436331f4e7e19253e2fdf64a8 100644
--- a/contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql
+++ b/contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql
@@ -1,41 +1,41 @@
 /* contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql */
 
-CREATE OR REPLACE FUNCTION levenshtein (text,text) RETURNS int
+CREATE FUNCTION levenshtein (text,text) RETURNS int
 AS 'MODULE_PATHNAME','levenshtein'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION levenshtein (text,text,int,int,int) RETURNS int
+CREATE FUNCTION levenshtein (text,text,int,int,int) RETURNS int
 AS 'MODULE_PATHNAME','levenshtein_with_costs'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION levenshtein_less_equal (text,text,int) RETURNS int
+CREATE FUNCTION levenshtein_less_equal (text,text,int) RETURNS int
 AS 'MODULE_PATHNAME','levenshtein_less_equal'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION levenshtein_less_equal (text,text,int,int,int,int) RETURNS int
+CREATE FUNCTION levenshtein_less_equal (text,text,int,int,int,int) RETURNS int
 AS 'MODULE_PATHNAME','levenshtein_less_equal_with_costs'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION metaphone (text,int) RETURNS text
+CREATE FUNCTION metaphone (text,int) RETURNS text
 AS 'MODULE_PATHNAME','metaphone'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION soundex(text) RETURNS text
+CREATE FUNCTION soundex(text) RETURNS text
 AS 'MODULE_PATHNAME', 'soundex'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION text_soundex(text) RETURNS text
+CREATE FUNCTION text_soundex(text) RETURNS text
 AS 'MODULE_PATHNAME', 'soundex'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION difference(text,text) RETURNS int
+CREATE FUNCTION difference(text,text) RETURNS int
 AS 'MODULE_PATHNAME', 'difference'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION dmetaphone (text) RETURNS text
+CREATE FUNCTION dmetaphone (text) RETURNS text
 AS 'MODULE_PATHNAME', 'dmetaphone'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION dmetaphone_alt (text) RETURNS text
+CREATE FUNCTION dmetaphone_alt (text) RETURNS text
 AS 'MODULE_PATHNAME', 'dmetaphone_alt'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/hstore/hstore--1.0.sql b/contrib/hstore/hstore--1.0.sql
index d77b14286bdce8af49bdad9620e00c5c4ce827fe..247a2773f5ad8da91901dfccb16d9eac53076c21 100644
--- a/contrib/hstore/hstore--1.0.sql
+++ b/contrib/hstore/hstore--1.0.sql
@@ -2,22 +2,22 @@
 
 CREATE TYPE hstore;
 
-CREATE OR REPLACE FUNCTION hstore_in(cstring)
+CREATE FUNCTION hstore_in(cstring)
 RETURNS hstore
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_out(hstore)
+CREATE FUNCTION hstore_out(hstore)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_recv(internal)
+CREATE FUNCTION hstore_recv(internal)
 RETURNS hstore
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_send(hstore)
+CREATE FUNCTION hstore_send(hstore)
 RETURNS bytea
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -31,12 +31,12 @@ CREATE TYPE hstore (
         STORAGE = extended
 );
 
-CREATE OR REPLACE FUNCTION hstore_version_diag(hstore)
+CREATE FUNCTION hstore_version_diag(hstore)
 RETURNS integer
 AS 'MODULE_PATHNAME','hstore_version_diag'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION fetchval(hstore,text)
+CREATE FUNCTION fetchval(hstore,text)
 RETURNS text
 AS 'MODULE_PATHNAME','hstore_fetchval'
 LANGUAGE C STRICT IMMUTABLE;
@@ -47,7 +47,7 @@ CREATE OPERATOR -> (
 	PROCEDURE = fetchval
 );
 
-CREATE OR REPLACE FUNCTION slice_array(hstore,text[])
+CREATE FUNCTION slice_array(hstore,text[])
 RETURNS text[]
 AS 'MODULE_PATHNAME','hstore_slice_to_array'
 LANGUAGE C STRICT IMMUTABLE;
@@ -58,17 +58,17 @@ CREATE OPERATOR -> (
 	PROCEDURE = slice_array
 );
 
-CREATE OR REPLACE FUNCTION slice(hstore,text[])
+CREATE FUNCTION slice(hstore,text[])
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_slice_to_hstore'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION isexists(hstore,text)
+CREATE FUNCTION isexists(hstore,text)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_exists'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION exist(hstore,text)
+CREATE FUNCTION exist(hstore,text)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_exists'
 LANGUAGE C STRICT IMMUTABLE;
@@ -81,7 +81,7 @@ CREATE OPERATOR ? (
 	JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION exists_any(hstore,text[])
+CREATE FUNCTION exists_any(hstore,text[])
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_exists_any'
 LANGUAGE C STRICT IMMUTABLE;
@@ -94,7 +94,7 @@ CREATE OPERATOR ?| (
 	JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION exists_all(hstore,text[])
+CREATE FUNCTION exists_all(hstore,text[])
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_exists_all'
 LANGUAGE C STRICT IMMUTABLE;
@@ -107,27 +107,27 @@ CREATE OPERATOR ?& (
 	JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION isdefined(hstore,text)
+CREATE FUNCTION isdefined(hstore,text)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_defined'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION defined(hstore,text)
+CREATE FUNCTION defined(hstore,text)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_defined'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION delete(hstore,text)
+CREATE FUNCTION delete(hstore,text)
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_delete'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION delete(hstore,text[])
+CREATE FUNCTION delete(hstore,text[])
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_delete_array'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION delete(hstore,hstore)
+CREATE FUNCTION delete(hstore,hstore)
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_delete_hstore'
 LANGUAGE C STRICT IMMUTABLE;
@@ -150,7 +150,7 @@ CREATE OPERATOR - (
 	PROCEDURE = delete
 );
 
-CREATE OR REPLACE FUNCTION hs_concat(hstore,hstore)
+CREATE FUNCTION hs_concat(hstore,hstore)
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_concat'
 LANGUAGE C STRICT IMMUTABLE;
@@ -161,12 +161,12 @@ CREATE OPERATOR || (
 	PROCEDURE = hs_concat
 );
 
-CREATE OR REPLACE FUNCTION hs_contains(hstore,hstore)
+CREATE FUNCTION hs_contains(hstore,hstore)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_contains'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hs_contained(hstore,hstore)
+CREATE FUNCTION hs_contained(hstore,hstore)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_contained'
 LANGUAGE C STRICT IMMUTABLE;
@@ -208,12 +208,12 @@ CREATE OPERATOR ~ (
 	JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION tconvert(text,text)
+CREATE FUNCTION tconvert(text,text)
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_from_text'
 LANGUAGE C IMMUTABLE; -- not STRICT; needs to allow (key,NULL)
 
-CREATE OR REPLACE FUNCTION hstore(text,text)
+CREATE FUNCTION hstore(text,text)
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_from_text'
 LANGUAGE C IMMUTABLE; -- not STRICT; needs to allow (key,NULL)
@@ -224,7 +224,7 @@ CREATE OPERATOR => (
 	PROCEDURE = hstore
 );
 
-CREATE OR REPLACE FUNCTION hstore(text[],text[])
+CREATE FUNCTION hstore(text[],text[])
 RETURNS hstore
 AS 'MODULE_PATHNAME', 'hstore_from_arrays'
 LANGUAGE C IMMUTABLE; -- not STRICT; allows (keys,null)
@@ -237,12 +237,12 @@ LANGUAGE C IMMUTABLE STRICT;
 CREATE CAST (text[] AS hstore)
   WITH FUNCTION hstore(text[]);
 
-CREATE OR REPLACE FUNCTION hstore(record)
+CREATE FUNCTION hstore(record)
 RETURNS hstore
 AS 'MODULE_PATHNAME', 'hstore_from_record'
 LANGUAGE C IMMUTABLE; -- not STRICT; allows (null::recordtype)
 
-CREATE OR REPLACE FUNCTION hstore_to_array(hstore)
+CREATE FUNCTION hstore_to_array(hstore)
 RETURNS text[]
 AS 'MODULE_PATHNAME','hstore_to_array'
 LANGUAGE C STRICT IMMUTABLE;
@@ -252,7 +252,7 @@ CREATE OPERATOR %% (
        PROCEDURE = hstore_to_array
 );
 
-CREATE OR REPLACE FUNCTION hstore_to_matrix(hstore)
+CREATE FUNCTION hstore_to_matrix(hstore)
 RETURNS text[]
 AS 'MODULE_PATHNAME','hstore_to_matrix'
 LANGUAGE C STRICT IMMUTABLE;
@@ -262,34 +262,34 @@ CREATE OPERATOR %# (
        PROCEDURE = hstore_to_matrix
 );
 
-CREATE OR REPLACE FUNCTION akeys(hstore)
+CREATE FUNCTION akeys(hstore)
 RETURNS text[]
 AS 'MODULE_PATHNAME','hstore_akeys'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION avals(hstore)
+CREATE FUNCTION avals(hstore)
 RETURNS text[]
 AS 'MODULE_PATHNAME','hstore_avals'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION skeys(hstore)
+CREATE FUNCTION skeys(hstore)
 RETURNS setof text
 AS 'MODULE_PATHNAME','hstore_skeys'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION svals(hstore)
+CREATE FUNCTION svals(hstore)
 RETURNS setof text
 AS 'MODULE_PATHNAME','hstore_svals'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION each(IN hs hstore,
+CREATE FUNCTION each(IN hs hstore,
     OUT key text,
     OUT value text)
 RETURNS SETOF record
 AS 'MODULE_PATHNAME','hstore_each'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION populate_record(anyelement,hstore)
+CREATE FUNCTION populate_record(anyelement,hstore)
 RETURNS anyelement
 AS 'MODULE_PATHNAME', 'hstore_populate_record'
 LANGUAGE C IMMUTABLE; -- not STRICT; allows (null::rectype,hstore)
@@ -302,37 +302,37 @@ CREATE OPERATOR #= (
 
 -- btree support
 
-CREATE OR REPLACE FUNCTION hstore_eq(hstore,hstore)
+CREATE FUNCTION hstore_eq(hstore,hstore)
 RETURNS boolean
 AS 'MODULE_PATHNAME','hstore_eq'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_ne(hstore,hstore)
+CREATE FUNCTION hstore_ne(hstore,hstore)
 RETURNS boolean
 AS 'MODULE_PATHNAME','hstore_ne'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_gt(hstore,hstore)
+CREATE FUNCTION hstore_gt(hstore,hstore)
 RETURNS boolean
 AS 'MODULE_PATHNAME','hstore_gt'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_ge(hstore,hstore)
+CREATE FUNCTION hstore_ge(hstore,hstore)
 RETURNS boolean
 AS 'MODULE_PATHNAME','hstore_ge'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_lt(hstore,hstore)
+CREATE FUNCTION hstore_lt(hstore,hstore)
 RETURNS boolean
 AS 'MODULE_PATHNAME','hstore_lt'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_le(hstore,hstore)
+CREATE FUNCTION hstore_le(hstore,hstore)
 RETURNS boolean
 AS 'MODULE_PATHNAME','hstore_le'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION hstore_cmp(hstore,hstore)
+CREATE FUNCTION hstore_cmp(hstore,hstore)
 RETURNS integer
 AS 'MODULE_PATHNAME','hstore_cmp'
 LANGUAGE C STRICT IMMUTABLE;
@@ -411,7 +411,7 @@ AS
 
 -- hash support
 
-CREATE OR REPLACE FUNCTION hstore_hash(hstore)
+CREATE FUNCTION hstore_hash(hstore)
 RETURNS integer
 AS 'MODULE_PATHNAME','hstore_hash'
 LANGUAGE C STRICT IMMUTABLE;
@@ -426,12 +426,12 @@ AS
 
 CREATE TYPE ghstore;
 
-CREATE OR REPLACE FUNCTION ghstore_in(cstring)
+CREATE FUNCTION ghstore_in(cstring)
 RETURNS ghstore
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ghstore_out(ghstore)
+CREATE FUNCTION ghstore_out(ghstore)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -442,37 +442,37 @@ CREATE TYPE ghstore (
         OUTPUT = ghstore_out
 );
 
-CREATE OR REPLACE FUNCTION ghstore_compress(internal)
+CREATE FUNCTION ghstore_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ghstore_decompress(internal)
+CREATE FUNCTION ghstore_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ghstore_penalty(internal,internal,internal)
+CREATE FUNCTION ghstore_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ghstore_picksplit(internal, internal)
+CREATE FUNCTION ghstore_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ghstore_union(internal, internal)
+CREATE FUNCTION ghstore_union(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ghstore_same(internal, internal, internal)
+CREATE FUNCTION ghstore_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ghstore_consistent(internal,internal,int,oid,internal)
+CREATE FUNCTION ghstore_consistent(internal,internal,int,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -498,17 +498,17 @@ AS
 
 -- GIN support
 
-CREATE OR REPLACE FUNCTION gin_extract_hstore(internal, internal)
+CREATE FUNCTION gin_extract_hstore(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gin_extract_hstore_query(internal, internal, int2, internal, internal)
+CREATE FUNCTION gin_extract_hstore_query(internal, internal, int2, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gin_consistent_hstore(internal, int2, internal, int4, internal, internal)
+CREATE FUNCTION gin_consistent_hstore(internal, int2, internal, int4, internal, internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/intagg/int_aggregate--1.0.sql b/contrib/intagg/int_aggregate--1.0.sql
index 3df72c18cf176273d2bec955407bc114268c3cf0..ce78d17b77b9c830118dd13253d1c9ae934b60d6 100644
--- a/contrib/intagg/int_aggregate--1.0.sql
+++ b/contrib/intagg/int_aggregate--1.0.sql
@@ -2,14 +2,14 @@
 
 -- Internal function for the aggregate
 -- Is called for each item in an aggregation
-CREATE OR REPLACE FUNCTION int_agg_state (internal, int4)
+CREATE FUNCTION int_agg_state (internal, int4)
 RETURNS internal
 AS 'array_agg_transfn'
 LANGUAGE INTERNAL;
 
 -- Internal function for the aggregate
 -- Is called at the end of the aggregation, and returns an array.
-CREATE OR REPLACE FUNCTION int_agg_final_array (internal)
+CREATE FUNCTION int_agg_final_array (internal)
 RETURNS int4[]
 AS 'array_agg_finalfn'
 LANGUAGE INTERNAL;
@@ -26,7 +26,7 @@ CREATE AGGREGATE int_array_aggregate (
 -- The enumeration function
 -- returns each element in a one dimensional integer array
 -- as a row.
-CREATE OR REPLACE FUNCTION int_array_enum(int4[])
+CREATE FUNCTION int_array_enum(int4[])
 RETURNS setof integer
 AS 'array_unnest'
 LANGUAGE INTERNAL IMMUTABLE STRICT;
diff --git a/contrib/intarray/intarray--1.0.sql b/contrib/intarray/intarray--1.0.sql
index 5f86ee607f11725e9e69b774064f48fefbcb9546..3b77c516cbc12a60d5250d91095793d9029536ed 100644
--- a/contrib/intarray/intarray--1.0.sql
+++ b/contrib/intarray/intarray--1.0.sql
@@ -5,12 +5,12 @@
 --
 
 -- Query type
-CREATE OR REPLACE FUNCTION bqarr_in(cstring)
+CREATE FUNCTION bqarr_in(cstring)
 RETURNS query_int
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION bqarr_out(query_int)
+CREATE FUNCTION bqarr_out(query_int)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -22,20 +22,20 @@ CREATE TYPE query_int (
 );
 
 --only for debug
-CREATE OR REPLACE FUNCTION querytree(query_int)
+CREATE FUNCTION querytree(query_int)
 RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 
-CREATE OR REPLACE FUNCTION boolop(_int4, query_int)
+CREATE FUNCTION boolop(_int4, query_int)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 COMMENT ON FUNCTION boolop(_int4, query_int) IS 'boolean operation with array';
 
-CREATE OR REPLACE FUNCTION rboolop(query_int, _int4)
+CREATE FUNCTION rboolop(query_int, _int4)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -67,35 +67,35 @@ CREATE OPERATOR ~~ (
 
 -- Comparison methods
 
-CREATE OR REPLACE FUNCTION _int_contains(_int4, _int4)
+CREATE FUNCTION _int_contains(_int4, _int4)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 COMMENT ON FUNCTION _int_contains(_int4, _int4) IS 'contains';
 
-CREATE OR REPLACE FUNCTION _int_contained(_int4, _int4)
+CREATE FUNCTION _int_contained(_int4, _int4)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 COMMENT ON FUNCTION _int_contained(_int4, _int4) IS 'contained in';
 
-CREATE OR REPLACE FUNCTION _int_overlap(_int4, _int4)
+CREATE FUNCTION _int_overlap(_int4, _int4)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 COMMENT ON FUNCTION _int_overlap(_int4, _int4) IS 'overlaps';
 
-CREATE OR REPLACE FUNCTION _int_same(_int4, _int4)
+CREATE FUNCTION _int_same(_int4, _int4)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 COMMENT ON FUNCTION _int_same(_int4, _int4) IS 'same as';
 
-CREATE OR REPLACE FUNCTION _int_different(_int4, _int4)
+CREATE FUNCTION _int_different(_int4, _int4)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -104,12 +104,12 @@ COMMENT ON FUNCTION _int_different(_int4, _int4) IS 'different';
 
 -- support routines for indexing
 
-CREATE OR REPLACE FUNCTION _int_union(_int4, _int4)
+CREATE FUNCTION _int_union(_int4, _int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _int_inter(_int4, _int4)
+CREATE FUNCTION _int_inter(_int4, _int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -187,12 +187,12 @@ CREATE OPERATOR ~ (
 );
 
 --------------
-CREATE OR REPLACE FUNCTION intset(int4)
+CREATE FUNCTION intset(int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION icount(_int4)
+CREATE FUNCTION icount(_int4)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -202,32 +202,32 @@ CREATE OPERATOR # (
 	PROCEDURE = icount
 );
 
-CREATE OR REPLACE FUNCTION sort(_int4, text)
+CREATE FUNCTION sort(_int4, text)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION sort(_int4)
+CREATE FUNCTION sort(_int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION sort_asc(_int4)
+CREATE FUNCTION sort_asc(_int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION sort_desc(_int4)
+CREATE FUNCTION sort_desc(_int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION uniq(_int4)
+CREATE FUNCTION uniq(_int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION idx(_int4, int4)
+CREATE FUNCTION idx(_int4, int4)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -238,17 +238,17 @@ CREATE OPERATOR # (
 	PROCEDURE = idx
 );
 
-CREATE OR REPLACE FUNCTION subarray(_int4, int4, int4)
+CREATE FUNCTION subarray(_int4, int4, int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION subarray(_int4, int4)
+CREATE FUNCTION subarray(_int4, int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION intarray_push_elem(_int4, int4)
+CREATE FUNCTION intarray_push_elem(_int4, int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -259,7 +259,7 @@ CREATE OPERATOR + (
 	PROCEDURE = intarray_push_elem
 );
 
-CREATE OR REPLACE FUNCTION intarray_push_array(_int4, _int4)
+CREATE FUNCTION intarray_push_array(_int4, _int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -271,7 +271,7 @@ CREATE OPERATOR + (
 	PROCEDURE = intarray_push_array
 );
 
-CREATE OR REPLACE FUNCTION intarray_del_elem(_int4, int4)
+CREATE FUNCTION intarray_del_elem(_int4, int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -282,7 +282,7 @@ CREATE OPERATOR - (
 	PROCEDURE = intarray_del_elem
 );
 
-CREATE OR REPLACE FUNCTION intset_union_elem(_int4, int4)
+CREATE FUNCTION intset_union_elem(_int4, int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -300,7 +300,7 @@ CREATE OPERATOR | (
 	PROCEDURE = _int_union
 );
 
-CREATE OR REPLACE FUNCTION intset_subtract(_int4, _int4)
+CREATE FUNCTION intset_subtract(_int4, _int4)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -320,37 +320,37 @@ CREATE OPERATOR & (
 --------------
 
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION g_int_consistent(internal,_int4,int,oid,internal)
+CREATE FUNCTION g_int_consistent(internal,_int4,int,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_int_compress(internal)
+CREATE FUNCTION g_int_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_int_decompress(internal)
+CREATE FUNCTION g_int_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_int_penalty(internal,internal,internal)
+CREATE FUNCTION g_int_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_int_picksplit(internal, internal)
+CREATE FUNCTION g_int_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_int_union(internal, internal)
+CREATE FUNCTION g_int_union(internal, internal)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_int_same(_int4, _int4, internal)
+CREATE FUNCTION g_int_same(_int4, _int4, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -381,12 +381,12 @@ DEFAULT FOR TYPE _int4 USING gist AS
 ---------------------------------------------
 -- define the GiST support methods
 
-CREATE OR REPLACE FUNCTION _intbig_in(cstring)
+CREATE FUNCTION _intbig_in(cstring)
 RETURNS intbig_gkey
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _intbig_out(intbig_gkey)
+CREATE FUNCTION _intbig_out(intbig_gkey)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -397,37 +397,37 @@ CREATE TYPE intbig_gkey (
         OUTPUT = _intbig_out
 );
 
-CREATE OR REPLACE FUNCTION g_intbig_consistent(internal,internal,int,oid,internal)
+CREATE FUNCTION g_intbig_consistent(internal,internal,int,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_intbig_compress(internal)
+CREATE FUNCTION g_intbig_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_intbig_decompress(internal)
+CREATE FUNCTION g_intbig_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_intbig_penalty(internal,internal,internal)
+CREATE FUNCTION g_intbig_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_intbig_picksplit(internal, internal)
+CREATE FUNCTION g_intbig_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_intbig_union(internal, internal)
+CREATE FUNCTION g_intbig_union(internal, internal)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION g_intbig_same(internal, internal, internal)
+CREATE FUNCTION g_intbig_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -455,12 +455,12 @@ AS
 
 --GIN
 
-CREATE OR REPLACE FUNCTION ginint4_queryextract(internal, internal, int2, internal, internal, internal, internal)
+CREATE FUNCTION ginint4_queryextract(internal, internal, int2, internal, internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ginint4_consistent(internal, int2, internal, int4, internal, internal, internal, internal)
+CREATE FUNCTION ginint4_consistent(internal, int2, internal, int4, internal, internal, internal, internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/isn/isn--1.0.sql b/contrib/isn/isn--1.0.sql
index a6499f267a5dde0ea920a27f44219a69c95fdb2c..336ad1db3ce101d014867a912c12b230f95986bd 100644
--- a/contrib/isn/isn--1.0.sql
+++ b/contrib/isn/isn--1.0.sql
@@ -12,12 +12,12 @@
 --	Input and output functions and data types:
 --
 ---------------------------------------------------
-CREATE OR REPLACE FUNCTION ean13_in(cstring)
+CREATE FUNCTION ean13_in(cstring)
 	RETURNS ean13
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION ean13_out(ean13)
+CREATE FUNCTION ean13_out(ean13)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -30,12 +30,12 @@ CREATE TYPE ean13 (
 COMMENT ON TYPE ean13
 	IS 'International European Article Number (EAN13)';
 
-CREATE OR REPLACE FUNCTION isbn13_in(cstring)
+CREATE FUNCTION isbn13_in(cstring)
 	RETURNS isbn13
 	AS 'MODULE_PATHNAME', 'isbn_in'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION ean13_out(isbn13)
+CREATE FUNCTION ean13_out(isbn13)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -48,12 +48,12 @@ CREATE TYPE isbn13 (
 COMMENT ON TYPE isbn13
 	IS 'International Standard Book Number 13 (ISBN13)';
 
-CREATE OR REPLACE FUNCTION ismn13_in(cstring)
+CREATE FUNCTION ismn13_in(cstring)
 	RETURNS ismn13
 	AS 'MODULE_PATHNAME', 'ismn_in'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION ean13_out(ismn13)
+CREATE FUNCTION ean13_out(ismn13)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -66,12 +66,12 @@ CREATE TYPE ismn13 (
 COMMENT ON TYPE ismn13
 	IS 'International Standard Music Number 13 (ISMN13)';
 
-CREATE OR REPLACE FUNCTION issn13_in(cstring)
+CREATE FUNCTION issn13_in(cstring)
 	RETURNS issn13
 	AS 'MODULE_PATHNAME', 'issn_in'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION ean13_out(issn13)
+CREATE FUNCTION ean13_out(issn13)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -86,12 +86,12 @@ COMMENT ON TYPE issn13
 
 -- Short format:
 
-CREATE OR REPLACE FUNCTION isbn_in(cstring)
+CREATE FUNCTION isbn_in(cstring)
 	RETURNS isbn
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isn_out(isbn)
+CREATE FUNCTION isn_out(isbn)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -104,12 +104,12 @@ CREATE TYPE isbn (
 COMMENT ON TYPE isbn
 	IS 'International Standard Book Number (ISBN)';
 
-CREATE OR REPLACE FUNCTION ismn_in(cstring)
+CREATE FUNCTION ismn_in(cstring)
 	RETURNS ismn
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isn_out(ismn)
+CREATE FUNCTION isn_out(ismn)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -122,12 +122,12 @@ CREATE TYPE ismn (
 COMMENT ON TYPE ismn
 	IS 'International Standard Music Number (ISMN)';
 
-CREATE OR REPLACE FUNCTION issn_in(cstring)
+CREATE FUNCTION issn_in(cstring)
 	RETURNS issn
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isn_out(issn)
+CREATE FUNCTION isn_out(issn)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -140,12 +140,12 @@ CREATE TYPE issn (
 COMMENT ON TYPE issn
 	IS 'International Standard Serial Number (ISSN)';
 
-CREATE OR REPLACE FUNCTION upc_in(cstring)
+CREATE FUNCTION upc_in(cstring)
 	RETURNS upc
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isn_out(upc)
+CREATE FUNCTION isn_out(upc)
 	RETURNS cstring
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -163,249 +163,249 @@ COMMENT ON TYPE upc
 --
 ---------------------------------------------------
 -- EAN13:
-CREATE OR REPLACE FUNCTION isnlt(ean13, ean13)
+CREATE FUNCTION isnlt(ean13, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, ean13)
+CREATE FUNCTION isnle(ean13, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, ean13)
+CREATE FUNCTION isneq(ean13, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, ean13)
+CREATE FUNCTION isnge(ean13, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, ean13)
+CREATE FUNCTION isngt(ean13, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, ean13)
+CREATE FUNCTION isnne(ean13, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, isbn13)
+CREATE FUNCTION isnlt(ean13, isbn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, isbn13)
+CREATE FUNCTION isnle(ean13, isbn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, isbn13)
+CREATE FUNCTION isneq(ean13, isbn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, isbn13)
+CREATE FUNCTION isnge(ean13, isbn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, isbn13)
+CREATE FUNCTION isngt(ean13, isbn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, isbn13)
+CREATE FUNCTION isnne(ean13, isbn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, ismn13)
+CREATE FUNCTION isnlt(ean13, ismn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, ismn13)
+CREATE FUNCTION isnle(ean13, ismn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, ismn13)
+CREATE FUNCTION isneq(ean13, ismn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, ismn13)
+CREATE FUNCTION isnge(ean13, ismn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, ismn13)
+CREATE FUNCTION isngt(ean13, ismn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, ismn13)
+CREATE FUNCTION isnne(ean13, ismn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, issn13)
+CREATE FUNCTION isnlt(ean13, issn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, issn13)
+CREATE FUNCTION isnle(ean13, issn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, issn13)
+CREATE FUNCTION isneq(ean13, issn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, issn13)
+CREATE FUNCTION isnge(ean13, issn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, issn13)
+CREATE FUNCTION isngt(ean13, issn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, issn13)
+CREATE FUNCTION isnne(ean13, issn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, isbn)
+CREATE FUNCTION isnlt(ean13, isbn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, isbn)
+CREATE FUNCTION isnle(ean13, isbn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, isbn)
+CREATE FUNCTION isneq(ean13, isbn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, isbn)
+CREATE FUNCTION isnge(ean13, isbn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, isbn)
+CREATE FUNCTION isngt(ean13, isbn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, isbn)
+CREATE FUNCTION isnne(ean13, isbn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, ismn)
+CREATE FUNCTION isnlt(ean13, ismn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, ismn)
+CREATE FUNCTION isnle(ean13, ismn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, ismn)
+CREATE FUNCTION isneq(ean13, ismn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, ismn)
+CREATE FUNCTION isnge(ean13, ismn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, ismn)
+CREATE FUNCTION isngt(ean13, ismn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, ismn)
+CREATE FUNCTION isnne(ean13, ismn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, issn)
+CREATE FUNCTION isnlt(ean13, issn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, issn)
+CREATE FUNCTION isnle(ean13, issn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, issn)
+CREATE FUNCTION isneq(ean13, issn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, issn)
+CREATE FUNCTION isnge(ean13, issn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, issn)
+CREATE FUNCTION isngt(ean13, issn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, issn)
+CREATE FUNCTION isnne(ean13, issn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ean13, upc)
+CREATE FUNCTION isnlt(ean13, upc)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ean13, upc)
+CREATE FUNCTION isnle(ean13, upc)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ean13, upc)
+CREATE FUNCTION isneq(ean13, upc)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ean13, upc)
+CREATE FUNCTION isnge(ean13, upc)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ean13, upc)
+CREATE FUNCTION isngt(ean13, upc)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ean13, upc)
+CREATE FUNCTION isnne(ean13, upc)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -413,94 +413,94 @@ CREATE OR REPLACE FUNCTION isnne(ean13, upc)
 
 ---------------------------------------------------
 -- ISBN13:
-CREATE OR REPLACE FUNCTION isnlt(isbn13, isbn13)
+CREATE FUNCTION isnlt(isbn13, isbn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(isbn13, isbn13)
+CREATE FUNCTION isnle(isbn13, isbn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(isbn13, isbn13)
+CREATE FUNCTION isneq(isbn13, isbn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(isbn13, isbn13)
+CREATE FUNCTION isnge(isbn13, isbn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(isbn13, isbn13)
+CREATE FUNCTION isngt(isbn13, isbn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(isbn13, isbn13)
+CREATE FUNCTION isnne(isbn13, isbn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(isbn13, isbn)
+CREATE FUNCTION isnlt(isbn13, isbn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(isbn13, isbn)
+CREATE FUNCTION isnle(isbn13, isbn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(isbn13, isbn)
+CREATE FUNCTION isneq(isbn13, isbn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(isbn13, isbn)
+CREATE FUNCTION isnge(isbn13, isbn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(isbn13, isbn)
+CREATE FUNCTION isngt(isbn13, isbn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(isbn13, isbn)
+CREATE FUNCTION isnne(isbn13, isbn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(isbn13, ean13)
+CREATE FUNCTION isnlt(isbn13, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(isbn13, ean13)
+CREATE FUNCTION isnle(isbn13, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(isbn13, ean13)
+CREATE FUNCTION isneq(isbn13, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(isbn13, ean13)
+CREATE FUNCTION isnge(isbn13, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(isbn13, ean13)
+CREATE FUNCTION isngt(isbn13, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(isbn13, ean13)
+CREATE FUNCTION isnne(isbn13, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -508,94 +508,94 @@ CREATE OR REPLACE FUNCTION isnne(isbn13, ean13)
 
 ---------------------------------------------------
 -- ISBN:
-CREATE OR REPLACE FUNCTION isnlt(isbn, isbn)
+CREATE FUNCTION isnlt(isbn, isbn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(isbn, isbn)
+CREATE FUNCTION isnle(isbn, isbn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(isbn, isbn)
+CREATE FUNCTION isneq(isbn, isbn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(isbn, isbn)
+CREATE FUNCTION isnge(isbn, isbn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(isbn, isbn)
+CREATE FUNCTION isngt(isbn, isbn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(isbn, isbn)
+CREATE FUNCTION isnne(isbn, isbn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(isbn, isbn13)
+CREATE FUNCTION isnlt(isbn, isbn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(isbn, isbn13)
+CREATE FUNCTION isnle(isbn, isbn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(isbn, isbn13)
+CREATE FUNCTION isneq(isbn, isbn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(isbn, isbn13)
+CREATE FUNCTION isnge(isbn, isbn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(isbn, isbn13)
+CREATE FUNCTION isngt(isbn, isbn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(isbn, isbn13)
+CREATE FUNCTION isnne(isbn, isbn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(isbn, ean13)
+CREATE FUNCTION isnlt(isbn, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(isbn, ean13)
+CREATE FUNCTION isnle(isbn, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(isbn, ean13)
+CREATE FUNCTION isneq(isbn, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(isbn, ean13)
+CREATE FUNCTION isnge(isbn, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(isbn, ean13)
+CREATE FUNCTION isngt(isbn, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(isbn, ean13)
+CREATE FUNCTION isnne(isbn, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -603,94 +603,94 @@ CREATE OR REPLACE FUNCTION isnne(isbn, ean13)
 
 ---------------------------------------------------
 -- ISMN13:
-CREATE OR REPLACE FUNCTION isnlt(ismn13, ismn13)
+CREATE FUNCTION isnlt(ismn13, ismn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ismn13, ismn13)
+CREATE FUNCTION isnle(ismn13, ismn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ismn13, ismn13)
+CREATE FUNCTION isneq(ismn13, ismn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ismn13, ismn13)
+CREATE FUNCTION isnge(ismn13, ismn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ismn13, ismn13)
+CREATE FUNCTION isngt(ismn13, ismn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ismn13, ismn13)
+CREATE FUNCTION isnne(ismn13, ismn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ismn13, ismn)
+CREATE FUNCTION isnlt(ismn13, ismn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ismn13, ismn)
+CREATE FUNCTION isnle(ismn13, ismn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ismn13, ismn)
+CREATE FUNCTION isneq(ismn13, ismn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ismn13, ismn)
+CREATE FUNCTION isnge(ismn13, ismn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ismn13, ismn)
+CREATE FUNCTION isngt(ismn13, ismn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ismn13, ismn)
+CREATE FUNCTION isnne(ismn13, ismn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ismn13, ean13)
+CREATE FUNCTION isnlt(ismn13, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ismn13, ean13)
+CREATE FUNCTION isnle(ismn13, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ismn13, ean13)
+CREATE FUNCTION isneq(ismn13, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ismn13, ean13)
+CREATE FUNCTION isnge(ismn13, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ismn13, ean13)
+CREATE FUNCTION isngt(ismn13, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ismn13, ean13)
+CREATE FUNCTION isnne(ismn13, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -698,94 +698,94 @@ CREATE OR REPLACE FUNCTION isnne(ismn13, ean13)
 
 ---------------------------------------------------
 -- ISMN:
-CREATE OR REPLACE FUNCTION isnlt(ismn, ismn)
+CREATE FUNCTION isnlt(ismn, ismn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ismn, ismn)
+CREATE FUNCTION isnle(ismn, ismn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ismn, ismn)
+CREATE FUNCTION isneq(ismn, ismn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ismn, ismn)
+CREATE FUNCTION isnge(ismn, ismn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ismn, ismn)
+CREATE FUNCTION isngt(ismn, ismn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ismn, ismn)
+CREATE FUNCTION isnne(ismn, ismn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ismn, ismn13)
+CREATE FUNCTION isnlt(ismn, ismn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ismn, ismn13)
+CREATE FUNCTION isnle(ismn, ismn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ismn, ismn13)
+CREATE FUNCTION isneq(ismn, ismn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ismn, ismn13)
+CREATE FUNCTION isnge(ismn, ismn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ismn, ismn13)
+CREATE FUNCTION isngt(ismn, ismn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ismn, ismn13)
+CREATE FUNCTION isnne(ismn, ismn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(ismn, ean13)
+CREATE FUNCTION isnlt(ismn, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(ismn, ean13)
+CREATE FUNCTION isnle(ismn, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(ismn, ean13)
+CREATE FUNCTION isneq(ismn, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(ismn, ean13)
+CREATE FUNCTION isnge(ismn, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(ismn, ean13)
+CREATE FUNCTION isngt(ismn, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(ismn, ean13)
+CREATE FUNCTION isnne(ismn, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -793,94 +793,94 @@ CREATE OR REPLACE FUNCTION isnne(ismn, ean13)
 
 ---------------------------------------------------
 -- ISSN13:
-CREATE OR REPLACE FUNCTION isnlt(issn13, issn13)
+CREATE FUNCTION isnlt(issn13, issn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(issn13, issn13)
+CREATE FUNCTION isnle(issn13, issn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(issn13, issn13)
+CREATE FUNCTION isneq(issn13, issn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(issn13, issn13)
+CREATE FUNCTION isnge(issn13, issn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(issn13, issn13)
+CREATE FUNCTION isngt(issn13, issn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(issn13, issn13)
+CREATE FUNCTION isnne(issn13, issn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(issn13, issn)
+CREATE FUNCTION isnlt(issn13, issn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(issn13, issn)
+CREATE FUNCTION isnle(issn13, issn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(issn13, issn)
+CREATE FUNCTION isneq(issn13, issn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(issn13, issn)
+CREATE FUNCTION isnge(issn13, issn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(issn13, issn)
+CREATE FUNCTION isngt(issn13, issn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(issn13, issn)
+CREATE FUNCTION isnne(issn13, issn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(issn13, ean13)
+CREATE FUNCTION isnlt(issn13, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(issn13, ean13)
+CREATE FUNCTION isnle(issn13, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(issn13, ean13)
+CREATE FUNCTION isneq(issn13, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(issn13, ean13)
+CREATE FUNCTION isnge(issn13, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(issn13, ean13)
+CREATE FUNCTION isngt(issn13, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(issn13, ean13)
+CREATE FUNCTION isnne(issn13, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -888,94 +888,94 @@ CREATE OR REPLACE FUNCTION isnne(issn13, ean13)
 
 ---------------------------------------------------
 -- ISSN:
-CREATE OR REPLACE FUNCTION isnlt(issn, issn)
+CREATE FUNCTION isnlt(issn, issn)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(issn, issn)
+CREATE FUNCTION isnle(issn, issn)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(issn, issn)
+CREATE FUNCTION isneq(issn, issn)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(issn, issn)
+CREATE FUNCTION isnge(issn, issn)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(issn, issn)
+CREATE FUNCTION isngt(issn, issn)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(issn, issn)
+CREATE FUNCTION isnne(issn, issn)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(issn, issn13)
+CREATE FUNCTION isnlt(issn, issn13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(issn, issn13)
+CREATE FUNCTION isnle(issn, issn13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(issn, issn13)
+CREATE FUNCTION isneq(issn, issn13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(issn, issn13)
+CREATE FUNCTION isnge(issn, issn13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(issn, issn13)
+CREATE FUNCTION isngt(issn, issn13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(issn, issn13)
+CREATE FUNCTION isnne(issn, issn13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(issn, ean13)
+CREATE FUNCTION isnlt(issn, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(issn, ean13)
+CREATE FUNCTION isnle(issn, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(issn, ean13)
+CREATE FUNCTION isneq(issn, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(issn, ean13)
+CREATE FUNCTION isnge(issn, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(issn, ean13)
+CREATE FUNCTION isngt(issn, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(issn, ean13)
+CREATE FUNCTION isnne(issn, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -983,63 +983,63 @@ CREATE OR REPLACE FUNCTION isnne(issn, ean13)
 
 ---------------------------------------------------
 -- UPC:
-CREATE OR REPLACE FUNCTION isnlt(upc, upc)
+CREATE FUNCTION isnlt(upc, upc)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(upc, upc)
+CREATE FUNCTION isnle(upc, upc)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(upc, upc)
+CREATE FUNCTION isneq(upc, upc)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(upc, upc)
+CREATE FUNCTION isnge(upc, upc)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(upc, upc)
+CREATE FUNCTION isngt(upc, upc)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(upc, upc)
+CREATE FUNCTION isnne(upc, upc)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION isnlt(upc, ean13)
+CREATE FUNCTION isnlt(upc, ean13)
 	RETURNS boolean
 	AS 'int8lt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnle(upc, ean13)
+CREATE FUNCTION isnle(upc, ean13)
 	RETURNS boolean
 	AS 'int8le'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isneq(upc, ean13)
+CREATE FUNCTION isneq(upc, ean13)
 	RETURNS boolean
 	AS 'int8eq'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnge(upc, ean13)
+CREATE FUNCTION isnge(upc, ean13)
 	RETURNS boolean
 	AS 'int8ge'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isngt(upc, ean13)
+CREATE FUNCTION isngt(upc, ean13)
 	RETURNS boolean
 	AS 'int8gt'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isnne(upc, ean13)
+CREATE FUNCTION isnne(upc, ean13)
 	RETURNS boolean
 	AS 'int8ne'
 	LANGUAGE 'internal'
@@ -2522,7 +2522,7 @@ CREATE OPERATOR FAMILY isn_ops USING hash;
 --
 ---------------------------------------------------
 -- EAN13:
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, ean13)
+CREATE FUNCTION btean13cmp(ean13, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2537,7 +2537,7 @@ CREATE OPERATOR CLASS ean13_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btean13cmp(ean13, ean13);
 
-CREATE OR REPLACE FUNCTION hashean13(ean13)
+CREATE FUNCTION hashean13(ean13)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal' IMMUTABLE STRICT;
@@ -2548,37 +2548,37 @@ CREATE OPERATOR CLASS ean13_ops DEFAULT
 	FUNCTION 1  hashean13(ean13);
 
 -- EAN13 vs other types:
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, isbn13)
+CREATE FUNCTION btean13cmp(ean13, isbn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, ismn13)
+CREATE FUNCTION btean13cmp(ean13, ismn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, issn13)
+CREATE FUNCTION btean13cmp(ean13, issn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, isbn)
+CREATE FUNCTION btean13cmp(ean13, isbn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, ismn)
+CREATE FUNCTION btean13cmp(ean13, ismn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, issn)
+CREATE FUNCTION btean13cmp(ean13, issn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btean13cmp(ean13, upc)
+CREATE FUNCTION btean13cmp(ean13, upc)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2639,7 +2639,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- ISBN13:
-CREATE OR REPLACE FUNCTION btisbn13cmp(isbn13, isbn13)
+CREATE FUNCTION btisbn13cmp(isbn13, isbn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2654,7 +2654,7 @@ CREATE OPERATOR CLASS isbn13_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btisbn13cmp(isbn13, isbn13);
 
-CREATE OR REPLACE FUNCTION hashisbn13(isbn13)
+CREATE FUNCTION hashisbn13(isbn13)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -2666,12 +2666,12 @@ CREATE OPERATOR CLASS isbn13_ops DEFAULT
 	FUNCTION 1  hashisbn13(isbn13);
 
 -- ISBN13 vs other types:
-CREATE OR REPLACE FUNCTION btisbn13cmp(isbn13, ean13)
+CREATE FUNCTION btisbn13cmp(isbn13, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btisbn13cmp(isbn13, isbn)
+CREATE FUNCTION btisbn13cmp(isbn13, isbn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2697,7 +2697,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- ISBN:
-CREATE OR REPLACE FUNCTION btisbncmp(isbn, isbn)
+CREATE FUNCTION btisbncmp(isbn, isbn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2712,7 +2712,7 @@ CREATE OPERATOR CLASS isbn_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btisbncmp(isbn, isbn);
 
-CREATE OR REPLACE FUNCTION hashisbn(isbn)
+CREATE FUNCTION hashisbn(isbn)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -2724,12 +2724,12 @@ CREATE OPERATOR CLASS isbn_ops DEFAULT
 	FUNCTION 1  hashisbn(isbn);
 
 -- ISBN vs other types:
-CREATE OR REPLACE FUNCTION btisbncmp(isbn, ean13)
+CREATE FUNCTION btisbncmp(isbn, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btisbncmp(isbn, isbn13)
+CREATE FUNCTION btisbncmp(isbn, isbn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2755,7 +2755,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- ISMN13:
-CREATE OR REPLACE FUNCTION btismn13cmp(ismn13, ismn13)
+CREATE FUNCTION btismn13cmp(ismn13, ismn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2770,7 +2770,7 @@ CREATE OPERATOR CLASS ismn13_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btismn13cmp(ismn13, ismn13);
 
-CREATE OR REPLACE FUNCTION hashismn13(ismn13)
+CREATE FUNCTION hashismn13(ismn13)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -2782,12 +2782,12 @@ CREATE OPERATOR CLASS ismn13_ops DEFAULT
 	FUNCTION 1  hashismn13(ismn13);
 
 -- ISMN13 vs other types:
-CREATE OR REPLACE FUNCTION btismn13cmp(ismn13, ean13)
+CREATE FUNCTION btismn13cmp(ismn13, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btismn13cmp(ismn13, ismn)
+CREATE FUNCTION btismn13cmp(ismn13, ismn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2813,7 +2813,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- ISMN:
-CREATE OR REPLACE FUNCTION btismncmp(ismn, ismn)
+CREATE FUNCTION btismncmp(ismn, ismn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2828,7 +2828,7 @@ CREATE OPERATOR CLASS ismn_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btismncmp(ismn, ismn);
 
-CREATE OR REPLACE FUNCTION hashismn(ismn)
+CREATE FUNCTION hashismn(ismn)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -2840,12 +2840,12 @@ CREATE OPERATOR CLASS ismn_ops DEFAULT
 	FUNCTION 1  hashismn(ismn);
 
 -- ISMN vs other types:
-CREATE OR REPLACE FUNCTION btismncmp(ismn, ean13)
+CREATE FUNCTION btismncmp(ismn, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btismncmp(ismn, ismn13)
+CREATE FUNCTION btismncmp(ismn, ismn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2871,7 +2871,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- ISSN13:
-CREATE OR REPLACE FUNCTION btissn13cmp(issn13, issn13)
+CREATE FUNCTION btissn13cmp(issn13, issn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2886,7 +2886,7 @@ CREATE OPERATOR CLASS issn13_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btissn13cmp(issn13, issn13);
 
-CREATE OR REPLACE FUNCTION hashissn13(issn13)
+CREATE FUNCTION hashissn13(issn13)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -2898,12 +2898,12 @@ CREATE OPERATOR CLASS issn13_ops DEFAULT
 	FUNCTION 1  hashissn13(issn13);
 
 -- ISSN13 vs other types:
-CREATE OR REPLACE FUNCTION btissn13cmp(issn13, ean13)
+CREATE FUNCTION btissn13cmp(issn13, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btissn13cmp(issn13, issn)
+CREATE FUNCTION btissn13cmp(issn13, issn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2929,7 +2929,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- ISSN:
-CREATE OR REPLACE FUNCTION btissncmp(issn, issn)
+CREATE FUNCTION btissncmp(issn, issn)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2944,7 +2944,7 @@ CREATE OPERATOR CLASS issn_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btissncmp(issn, issn);
 
-CREATE OR REPLACE FUNCTION hashissn(issn)
+CREATE FUNCTION hashissn(issn)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -2956,12 +2956,12 @@ CREATE OPERATOR CLASS issn_ops DEFAULT
 	FUNCTION 1  hashissn(issn);
 
 -- ISSN vs other types:
-CREATE OR REPLACE FUNCTION btissncmp(issn, ean13)
+CREATE FUNCTION btissncmp(issn, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION btissncmp(issn, issn13)
+CREATE FUNCTION btissncmp(issn, issn13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -2987,7 +2987,7 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 
 ---------------------------------------------------
 -- UPC:
-CREATE OR REPLACE FUNCTION btupccmp(upc, upc)
+CREATE FUNCTION btupccmp(upc, upc)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -3002,7 +3002,7 @@ CREATE OPERATOR CLASS upc_ops DEFAULT
 	OPERATOR 5  >,
 	FUNCTION 1  btupccmp(upc, upc);
 
-CREATE OR REPLACE FUNCTION hashupc(upc)
+CREATE FUNCTION hashupc(upc)
 	RETURNS int4
 	AS 'hashint8'
 	LANGUAGE 'internal'
@@ -3014,7 +3014,7 @@ CREATE OPERATOR CLASS upc_ops DEFAULT
 	FUNCTION 1  hashupc(upc);
 
 -- UPC vs other types:
-CREATE OR REPLACE FUNCTION btupccmp(upc, ean13)
+CREATE FUNCTION btupccmp(upc, ean13)
 	RETURNS int4
 	AS 'btint8cmp'
 	LANGUAGE 'internal'
@@ -3035,31 +3035,31 @@ ALTER OPERATOR FAMILY isn_ops USING hash ADD
 -- Type casts:
 --
 ---------------------------------------------------
-CREATE OR REPLACE FUNCTION isbn13(ean13)
+CREATE FUNCTION isbn13(ean13)
 RETURNS isbn13
 AS 'MODULE_PATHNAME', 'isbn_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION ismn13(ean13)
+CREATE FUNCTION ismn13(ean13)
 RETURNS ismn13
 AS 'MODULE_PATHNAME', 'ismn_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION issn13(ean13)
+CREATE FUNCTION issn13(ean13)
 RETURNS issn13
 AS 'MODULE_PATHNAME', 'issn_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION isbn(ean13)
+CREATE FUNCTION isbn(ean13)
 RETURNS isbn
 AS 'MODULE_PATHNAME', 'isbn_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION ismn(ean13)
+CREATE FUNCTION ismn(ean13)
 RETURNS ismn
 AS 'MODULE_PATHNAME', 'ismn_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION issn(ean13)
+CREATE FUNCTION issn(ean13)
 RETURNS issn
 AS 'MODULE_PATHNAME', 'issn_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION upc(ean13)
+CREATE FUNCTION upc(ean13)
 RETURNS upc
 AS 'MODULE_PATHNAME', 'upc_cast_from_ean13'
 LANGUAGE 'C' IMMUTABLE STRICT;
@@ -3091,83 +3091,83 @@ CREATE CAST (issn13 AS issn) WITHOUT FUNCTION AS ASSIGNMENT;
 --
 -- Validation stuff for lose types:
 --
-CREATE OR REPLACE FUNCTION make_valid(ean13)
+CREATE FUNCTION make_valid(ean13)
 	RETURNS ean13
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(isbn13)
+CREATE FUNCTION make_valid(isbn13)
 	RETURNS isbn13
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(ismn13)
+CREATE FUNCTION make_valid(ismn13)
 	RETURNS ismn13
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(issn13)
+CREATE FUNCTION make_valid(issn13)
 	RETURNS issn13
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(isbn)
+CREATE FUNCTION make_valid(isbn)
 	RETURNS isbn
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(ismn)
+CREATE FUNCTION make_valid(ismn)
 	RETURNS ismn
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(issn)
+CREATE FUNCTION make_valid(issn)
 	RETURNS issn
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION make_valid(upc)
+CREATE FUNCTION make_valid(upc)
 	RETURNS upc
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION is_valid(ean13)
+CREATE FUNCTION is_valid(ean13)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(isbn13)
+CREATE FUNCTION is_valid(isbn13)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(ismn13)
+CREATE FUNCTION is_valid(ismn13)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(issn13)
+CREATE FUNCTION is_valid(issn13)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(isbn)
+CREATE FUNCTION is_valid(isbn)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(ismn)
+CREATE FUNCTION is_valid(ismn)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(issn)
+CREATE FUNCTION is_valid(issn)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
 	IMMUTABLE STRICT;
-CREATE OR REPLACE FUNCTION is_valid(upc)
+CREATE FUNCTION is_valid(upc)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME'
 	LANGUAGE 'C'
@@ -3177,7 +3177,7 @@ CREATE OR REPLACE FUNCTION is_valid(upc)
 -- isn_weak(boolean) - Sets the weak input mode.
 -- This function is intended for testing use only!
 --
-CREATE OR REPLACE FUNCTION isn_weak(boolean)
+CREATE FUNCTION isn_weak(boolean)
 	RETURNS boolean
 	AS 'MODULE_PATHNAME', 'accept_weak_input'
 	LANGUAGE 'C'
@@ -3186,7 +3186,7 @@ CREATE OR REPLACE FUNCTION isn_weak(boolean)
 --
 -- isn_weak() - Gets the weak input mode status
 --
-CREATE OR REPLACE FUNCTION isn_weak()
+CREATE FUNCTION isn_weak()
 	RETURNS boolean
 	AS 'MODULE_PATHNAME', 'weak_input_status'
 	LANGUAGE 'C'
diff --git a/contrib/lo/lo--1.0.sql b/contrib/lo/lo--1.0.sql
index 6ecb370a2276c0a2d926f85c904e971ace4c37aa..4b9a7dee32e41f1c89b0dc94f145ddbe3288f2cf 100644
--- a/contrib/lo/lo--1.0.sql
+++ b/contrib/lo/lo--1.0.sql
@@ -12,11 +12,11 @@ CREATE DOMAIN lo AS pg_catalog.oid;
 -- The other functions that formerly existed are not needed because
 -- the implicit casts between a domain and its underlying type handle them.
 --
-CREATE OR REPLACE FUNCTION lo_oid(lo) RETURNS pg_catalog.oid AS
+CREATE FUNCTION lo_oid(lo) RETURNS pg_catalog.oid AS
 'SELECT $1::pg_catalog.oid' LANGUAGE SQL STRICT IMMUTABLE;
 
 -- This is used in triggers
-CREATE OR REPLACE FUNCTION lo_manage()
+CREATE FUNCTION lo_manage()
 RETURNS pg_catalog.trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
diff --git a/contrib/ltree/ltree--1.0.sql b/contrib/ltree/ltree--1.0.sql
index d9b5ead53acc67d2654ae7c84b8443d0b34cc0d5..32969538a023c62b3c087bdc07d6cbdf6243f15a 100644
--- a/contrib/ltree/ltree--1.0.sql
+++ b/contrib/ltree/ltree--1.0.sql
@@ -1,11 +1,11 @@
 /* contrib/ltree/ltree--1.0.sql */
 
-CREATE OR REPLACE FUNCTION ltree_in(cstring)
+CREATE FUNCTION ltree_in(cstring)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_out(ltree)
+CREATE FUNCTION ltree_out(ltree)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
@@ -19,37 +19,37 @@ CREATE TYPE ltree (
 
 
 --Compare function for ltree
-CREATE OR REPLACE FUNCTION ltree_cmp(ltree,ltree)
+CREATE FUNCTION ltree_cmp(ltree,ltree)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_lt(ltree,ltree)
+CREATE FUNCTION ltree_lt(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_le(ltree,ltree)
+CREATE FUNCTION ltree_le(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_eq(ltree,ltree)
+CREATE FUNCTION ltree_eq(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_ge(ltree,ltree)
+CREATE FUNCTION ltree_ge(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_gt(ltree,ltree)
+CREATE FUNCTION ltree_gt(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_ne(ltree,ltree)
+CREATE FUNCTION ltree_ne(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -119,112 +119,112 @@ CREATE OPERATOR <> (
 
 --util functions
 
-CREATE OR REPLACE FUNCTION subltree(ltree,int4,int4)
+CREATE FUNCTION subltree(ltree,int4,int4)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION subpath(ltree,int4,int4)
+CREATE FUNCTION subpath(ltree,int4,int4)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION subpath(ltree,int4)
+CREATE FUNCTION subpath(ltree,int4)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION index(ltree,ltree)
+CREATE FUNCTION index(ltree,ltree)
 RETURNS int4
 AS 'MODULE_PATHNAME', 'ltree_index'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION index(ltree,ltree,int4)
+CREATE FUNCTION index(ltree,ltree,int4)
 RETURNS int4
 AS 'MODULE_PATHNAME', 'ltree_index'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION nlevel(ltree)
+CREATE FUNCTION nlevel(ltree)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree2text(ltree)
+CREATE FUNCTION ltree2text(ltree)
 RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION text2ltree(text)
+CREATE FUNCTION text2ltree(text)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(_ltree)
+CREATE FUNCTION lca(_ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME','_lca'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree,ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree,ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree,ltree,ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree,ltree,ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree,ltree,ltree,ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree,ltree,ltree,ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree,ltree,ltree,ltree,ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree,ltree,ltree,ltree,ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lca(ltree,ltree,ltree,ltree,ltree,ltree,ltree,ltree)
+CREATE FUNCTION lca(ltree,ltree,ltree,ltree,ltree,ltree,ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_isparent(ltree,ltree)
+CREATE FUNCTION ltree_isparent(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_risparent(ltree,ltree)
+CREATE FUNCTION ltree_risparent(ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_addltree(ltree,ltree)
+CREATE FUNCTION ltree_addltree(ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_addtext(ltree,text)
+CREATE FUNCTION ltree_addtext(ltree,text)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltree_textadd(text,ltree)
+CREATE FUNCTION ltree_textadd(text,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltreeparentsel(internal, oid, internal, integer)
+CREATE FUNCTION ltreeparentsel(internal, oid, internal, integer)
 RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -297,12 +297,12 @@ CREATE OPERATOR CLASS ltree_ops
 
 
 --lquery type
-CREATE OR REPLACE FUNCTION lquery_in(cstring)
+CREATE FUNCTION lquery_in(cstring)
 RETURNS lquery
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION lquery_out(lquery)
+CREATE FUNCTION lquery_out(lquery)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
@@ -314,12 +314,12 @@ CREATE TYPE lquery (
 	STORAGE = extended
 );
 
-CREATE OR REPLACE FUNCTION ltq_regex(ltree,lquery)
+CREATE FUNCTION ltq_regex(ltree,lquery)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltq_rregex(lquery,ltree)
+CREATE FUNCTION ltq_rregex(lquery,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -361,12 +361,12 @@ CREATE OPERATOR ^~ (
 	JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION lt_q_regex(ltree,_lquery)
+CREATE FUNCTION lt_q_regex(ltree,_lquery)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION lt_q_rregex(_lquery,ltree)
+CREATE FUNCTION lt_q_rregex(_lquery,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -408,12 +408,12 @@ CREATE OPERATOR ^? (
 	JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION ltxtq_in(cstring)
+CREATE FUNCTION ltxtq_in(cstring)
 RETURNS ltxtquery
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ltxtq_out(ltxtquery)
+CREATE FUNCTION ltxtq_out(ltxtquery)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
@@ -427,12 +427,12 @@ CREATE TYPE ltxtquery (
 
 -- operations WITH ltxtquery
 
-CREATE OR REPLACE FUNCTION ltxtq_exec(ltree, ltxtquery)
+CREATE FUNCTION ltxtq_exec(ltree, ltxtquery)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION ltxtq_rexec(ltxtquery, ltree)
+CREATE FUNCTION ltxtq_rexec(ltxtquery, ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -475,12 +475,12 @@ CREATE OPERATOR ^@ (
 );
 
 --GiST support for ltree
-CREATE OR REPLACE FUNCTION ltree_gist_in(cstring)
+CREATE FUNCTION ltree_gist_in(cstring)
 RETURNS ltree_gist
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_gist_out(ltree_gist)
+CREATE FUNCTION ltree_gist_out(ltree_gist)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
@@ -493,25 +493,25 @@ CREATE TYPE ltree_gist (
 );
 
 
-CREATE OR REPLACE FUNCTION ltree_consistent(internal,internal,int2,oid,internal)
+CREATE FUNCTION ltree_consistent(internal,internal,int2,oid,internal)
 RETURNS bool as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_compress(internal)
+CREATE FUNCTION ltree_compress(internal)
 RETURNS internal as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_decompress(internal)
+CREATE FUNCTION ltree_decompress(internal)
 RETURNS internal as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_penalty(internal,internal,internal)
+CREATE FUNCTION ltree_penalty(internal,internal,internal)
 RETURNS internal as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_picksplit(internal, internal)
+CREATE FUNCTION ltree_picksplit(internal, internal)
 RETURNS internal as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_union(internal, internal)
+CREATE FUNCTION ltree_union(internal, internal)
 RETURNS int4 as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION ltree_same(internal, internal, internal)
+CREATE FUNCTION ltree_same(internal, internal, internal)
 RETURNS internal as 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT;
 
 CREATE OPERATOR CLASS gist_ltree_ops
@@ -541,52 +541,52 @@ CREATE OPERATOR CLASS gist_ltree_ops
 
 -- arrays of ltree
 
-CREATE OR REPLACE FUNCTION _ltree_isparent(_ltree,ltree)
+CREATE FUNCTION _ltree_isparent(_ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltree_r_isparent(ltree,_ltree)
+CREATE FUNCTION _ltree_r_isparent(ltree,_ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltree_risparent(_ltree,ltree)
+CREATE FUNCTION _ltree_risparent(_ltree,ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltree_r_risparent(ltree,_ltree)
+CREATE FUNCTION _ltree_r_risparent(ltree,_ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltq_regex(_ltree,lquery)
+CREATE FUNCTION _ltq_regex(_ltree,lquery)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltq_rregex(lquery,_ltree)
+CREATE FUNCTION _ltq_rregex(lquery,_ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _lt_q_regex(_ltree,_lquery)
+CREATE FUNCTION _lt_q_regex(_ltree,_lquery)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _lt_q_rregex(_lquery,_ltree)
+CREATE FUNCTION _lt_q_rregex(_lquery,_ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltxtq_exec(_ltree, ltxtquery)
+CREATE FUNCTION _ltxtq_exec(_ltree, ltxtquery)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION _ltxtq_rexec(ltxtquery, _ltree)
+CREATE FUNCTION _ltxtq_rexec(ltxtquery, _ltree)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -774,7 +774,7 @@ CREATE OPERATOR ^@ (
 );
 
 --extractors
-CREATE OR REPLACE FUNCTION _ltree_extract_isparent(_ltree,ltree)
+CREATE FUNCTION _ltree_extract_isparent(_ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -785,7 +785,7 @@ CREATE OPERATOR ?@> (
 	PROCEDURE = _ltree_extract_isparent
 );
 
-CREATE OR REPLACE FUNCTION _ltree_extract_risparent(_ltree,ltree)
+CREATE FUNCTION _ltree_extract_risparent(_ltree,ltree)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -796,7 +796,7 @@ CREATE OPERATOR ?<@ (
 	PROCEDURE = _ltree_extract_risparent
 );
 
-CREATE OR REPLACE FUNCTION _ltq_extract_regex(_ltree,lquery)
+CREATE FUNCTION _ltq_extract_regex(_ltree,lquery)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -807,7 +807,7 @@ CREATE OPERATOR ?~ (
 	PROCEDURE = _ltq_extract_regex
 );
 
-CREATE OR REPLACE FUNCTION _ltxtq_extract_exec(_ltree,ltxtquery)
+CREATE FUNCTION _ltxtq_extract_exec(_ltree,ltxtquery)
 RETURNS ltree
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -819,32 +819,32 @@ CREATE OPERATOR ?@ (
 );
 
 --GiST support for ltree[]
-CREATE OR REPLACE FUNCTION _ltree_consistent(internal,internal,int2,oid,internal)
+CREATE FUNCTION _ltree_consistent(internal,internal,int2,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION _ltree_compress(internal)
+CREATE FUNCTION _ltree_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION _ltree_penalty(internal,internal,internal)
+CREATE FUNCTION _ltree_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION _ltree_picksplit(internal, internal)
+CREATE FUNCTION _ltree_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION _ltree_union(internal, internal)
+CREATE FUNCTION _ltree_union(internal, internal)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION _ltree_same(internal, internal, internal)
+CREATE FUNCTION _ltree_same(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/pageinspect/pageinspect--1.0.sql b/contrib/pageinspect/pageinspect--1.0.sql
index b6e46063ba295e39956a02d83a2cc310b2f3c5a5..b64eb61774982b388b87980e49a18f1a953c45d2 100644
--- a/contrib/pageinspect/pageinspect--1.0.sql
+++ b/contrib/pageinspect/pageinspect--1.0.sql
@@ -3,12 +3,12 @@
 --
 -- get_raw_page()
 --
-CREATE OR REPLACE FUNCTION get_raw_page(text, int4)
+CREATE FUNCTION get_raw_page(text, int4)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'get_raw_page'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION get_raw_page(text, text, int4)
+CREATE FUNCTION get_raw_page(text, text, int4)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'get_raw_page_fork'
 LANGUAGE C STRICT;
@@ -16,7 +16,7 @@ LANGUAGE C STRICT;
 --
 -- page_header()
 --
-CREATE OR REPLACE FUNCTION page_header(IN page bytea,
+CREATE FUNCTION page_header(IN page bytea,
     OUT lsn text,
     OUT tli smallint,
     OUT flags smallint,
@@ -32,7 +32,7 @@ LANGUAGE C STRICT;
 --
 -- heap_page_items()
 --
-CREATE OR REPLACE FUNCTION heap_page_items(IN page bytea,
+CREATE FUNCTION heap_page_items(IN page bytea,
     OUT lp smallint,
     OUT lp_off smallint,
     OUT lp_flags smallint,
@@ -53,7 +53,7 @@ LANGUAGE C STRICT;
 --
 -- bt_metap()
 --
-CREATE OR REPLACE FUNCTION bt_metap(IN relname text,
+CREATE FUNCTION bt_metap(IN relname text,
     OUT magic int4,
     OUT version int4,
     OUT root int4,
@@ -66,7 +66,7 @@ LANGUAGE C STRICT;
 --
 -- bt_page_stats()
 --
-CREATE OR REPLACE FUNCTION bt_page_stats(IN relname text, IN blkno int4,
+CREATE FUNCTION bt_page_stats(IN relname text, IN blkno int4,
     OUT blkno int4,
     OUT type "char",
     OUT live_items int4,
@@ -84,7 +84,7 @@ LANGUAGE C STRICT;
 --
 -- bt_page_items()
 --
-CREATE OR REPLACE FUNCTION bt_page_items(IN relname text, IN blkno int4,
+CREATE FUNCTION bt_page_items(IN relname text, IN blkno int4,
     OUT itemoffset smallint,
     OUT ctid tid,
     OUT itemlen smallint,
@@ -98,7 +98,7 @@ LANGUAGE C STRICT;
 --
 -- fsm_page_contents()
 --
-CREATE OR REPLACE FUNCTION fsm_page_contents(IN page bytea)
+CREATE FUNCTION fsm_page_contents(IN page bytea)
 RETURNS text
 AS 'MODULE_PATHNAME', 'fsm_page_contents'
 LANGUAGE C STRICT;
diff --git a/contrib/pg_buffercache/pg_buffercache--1.0.sql b/contrib/pg_buffercache/pg_buffercache--1.0.sql
index a49d171e04a0d9364a075812b660192e5f410984..9407d214108c78a92e059e930f27d3322660a600 100644
--- a/contrib/pg_buffercache/pg_buffercache--1.0.sql
+++ b/contrib/pg_buffercache/pg_buffercache--1.0.sql
@@ -1,7 +1,7 @@
 /* contrib/pg_buffercache/pg_buffercache--1.0.sql */
 
 -- Register the function.
-CREATE OR REPLACE FUNCTION pg_buffercache_pages()
+CREATE FUNCTION pg_buffercache_pages()
 RETURNS SETOF RECORD
 AS 'MODULE_PATHNAME', 'pg_buffercache_pages'
 LANGUAGE C;
diff --git a/contrib/pg_freespacemap/pg_freespacemap--1.0.sql b/contrib/pg_freespacemap/pg_freespacemap--1.0.sql
index 19f099ee37604a9e8d01eb78afe01d25564b7eaf..d63420e33a4eca70f66d4b6321bb15da0329bbe4 100644
--- a/contrib/pg_freespacemap/pg_freespacemap--1.0.sql
+++ b/contrib/pg_freespacemap/pg_freespacemap--1.0.sql
@@ -1,13 +1,13 @@
 /* contrib/pg_freespacemap/pg_freespacemap--1.0.sql */
 
 -- Register the C function.
-CREATE OR REPLACE FUNCTION pg_freespace(regclass, bigint)
+CREATE FUNCTION pg_freespace(regclass, bigint)
 RETURNS int2
 AS 'MODULE_PATHNAME', 'pg_freespace'
 LANGUAGE C STRICT;
 
 -- pg_freespace shows the recorded space avail at each block in a relation
-CREATE OR REPLACE FUNCTION
+CREATE FUNCTION
   pg_freespace(rel regclass, blkno OUT bigint, avail OUT int2)
 RETURNS SETOF RECORD
 AS $$
diff --git a/contrib/pg_trgm/pg_trgm--1.0.sql b/contrib/pg_trgm/pg_trgm--1.0.sql
index fc31728dcc187538f3443d1f39d965f6e470b465..79ea509042211a2cd97647efa9cbac0540087157 100644
--- a/contrib/pg_trgm/pg_trgm--1.0.sql
+++ b/contrib/pg_trgm/pg_trgm--1.0.sql
@@ -1,26 +1,26 @@
 /* contrib/pg_trgm/pg_trgm--1.0.sql */
 
-CREATE OR REPLACE FUNCTION set_limit(float4)
+CREATE FUNCTION set_limit(float4)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT VOLATILE;
 
-CREATE OR REPLACE FUNCTION show_limit()
+CREATE FUNCTION show_limit()
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT STABLE;
 
-CREATE OR REPLACE FUNCTION show_trgm(text)
+CREATE FUNCTION show_trgm(text)
 RETURNS _text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION similarity(text,text)
+CREATE FUNCTION similarity(text,text)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION similarity_op(text,text)
+CREATE FUNCTION similarity_op(text,text)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT STABLE;  -- stable because depends on trgm_limit
@@ -34,7 +34,7 @@ CREATE OPERATOR % (
         JOIN = contjoinsel
 );
 
-CREATE OR REPLACE FUNCTION similarity_dist(text,text)
+CREATE FUNCTION similarity_dist(text,text)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -47,12 +47,12 @@ CREATE OPERATOR <-> (
 );
 
 -- gist key
-CREATE OR REPLACE FUNCTION gtrgm_in(cstring)
+CREATE FUNCTION gtrgm_in(cstring)
 RETURNS gtrgm
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_out(gtrgm)
+CREATE FUNCTION gtrgm_out(gtrgm)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
@@ -64,42 +64,42 @@ CREATE TYPE gtrgm (
 );
 
 -- support functions for gist
-CREATE OR REPLACE FUNCTION gtrgm_consistent(internal,text,int,oid,internal)
+CREATE FUNCTION gtrgm_consistent(internal,text,int,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_distance(internal,text,int,oid)
+CREATE FUNCTION gtrgm_distance(internal,text,int,oid)
 RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_compress(internal)
+CREATE FUNCTION gtrgm_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_decompress(internal)
+CREATE FUNCTION gtrgm_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_penalty(internal,internal,internal)
+CREATE FUNCTION gtrgm_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_picksplit(internal, internal)
+CREATE FUNCTION gtrgm_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_union(bytea, internal)
+CREATE FUNCTION gtrgm_union(bytea, internal)
 RETURNS _int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gtrgm_same(gtrgm, gtrgm, internal)
+CREATE FUNCTION gtrgm_same(gtrgm, gtrgm, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
@@ -123,17 +123,17 @@ AS
         STORAGE         gtrgm;
 
 -- support functions for gin
-CREATE OR REPLACE FUNCTION gin_extract_value_trgm(text, internal)
+CREATE FUNCTION gin_extract_value_trgm(text, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gin_extract_query_trgm(text, internal, int2, internal, internal, internal, internal)
+CREATE FUNCTION gin_extract_query_trgm(text, internal, int2, internal, internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gin_trgm_consistent(internal, int2, text, int4, internal, internal, internal, internal)
+CREATE FUNCTION gin_trgm_consistent(internal, int2, text, int4, internal, internal, internal, internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/pgcrypto/pgcrypto--1.0.sql b/contrib/pgcrypto/pgcrypto--1.0.sql
index 29b489fbe5114c24f0ebe9a687f9a30dda7a7549..52be0950ce6391d064d61d404a44084404e461f6 100644
--- a/contrib/pgcrypto/pgcrypto--1.0.sql
+++ b/contrib/pgcrypto/pgcrypto--1.0.sql
@@ -1,61 +1,61 @@
 /* contrib/pgcrypto/pgcrypto--1.0.sql */
 
-CREATE OR REPLACE FUNCTION digest(text, text)
+CREATE FUNCTION digest(text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_digest'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION digest(bytea, text)
+CREATE FUNCTION digest(bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_digest'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION hmac(text, text, text)
+CREATE FUNCTION hmac(text, text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_hmac'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION hmac(bytea, bytea, text)
+CREATE FUNCTION hmac(bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_hmac'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION crypt(text, text)
+CREATE FUNCTION crypt(text, text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pg_crypt'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gen_salt(text)
+CREATE FUNCTION gen_salt(text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pg_gen_salt'
 LANGUAGE C VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION gen_salt(text, int4)
+CREATE FUNCTION gen_salt(text, int4)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pg_gen_salt_rounds'
 LANGUAGE C VOLATILE STRICT;
 
-CREATE OR REPLACE FUNCTION encrypt(bytea, bytea, text)
+CREATE FUNCTION encrypt(bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_encrypt'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION decrypt(bytea, bytea, text)
+CREATE FUNCTION decrypt(bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_decrypt'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION encrypt_iv(bytea, bytea, bytea, text)
+CREATE FUNCTION encrypt_iv(bytea, bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_encrypt_iv'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION decrypt_iv(bytea, bytea, bytea, text)
+CREATE FUNCTION decrypt_iv(bytea, bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_decrypt_iv'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gen_random_bytes(int4)
+CREATE FUNCTION gen_random_bytes(int4)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_random_bytes'
 LANGUAGE 'C' VOLATILE STRICT;
@@ -63,12 +63,12 @@ LANGUAGE 'C' VOLATILE STRICT;
 --
 -- pgp_sym_encrypt(data, key)
 --
-CREATE OR REPLACE FUNCTION pgp_sym_encrypt(text, text)
+CREATE FUNCTION pgp_sym_encrypt(text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_sym_encrypt_text'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_sym_encrypt_bytea(bytea, text)
+CREATE FUNCTION pgp_sym_encrypt_bytea(bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_sym_encrypt_bytea'
 LANGUAGE C STRICT;
@@ -76,12 +76,12 @@ LANGUAGE C STRICT;
 --
 -- pgp_sym_encrypt(data, key, args)
 --
-CREATE OR REPLACE FUNCTION pgp_sym_encrypt(text, text, text)
+CREATE FUNCTION pgp_sym_encrypt(text, text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_sym_encrypt_text'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_sym_encrypt_bytea(bytea, text, text)
+CREATE FUNCTION pgp_sym_encrypt_bytea(bytea, text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_sym_encrypt_bytea'
 LANGUAGE C STRICT;
@@ -89,12 +89,12 @@ LANGUAGE C STRICT;
 --
 -- pgp_sym_decrypt(data, key)
 --
-CREATE OR REPLACE FUNCTION pgp_sym_decrypt(bytea, text)
+CREATE FUNCTION pgp_sym_decrypt(bytea, text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pgp_sym_decrypt_text'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_sym_decrypt_bytea(bytea, text)
+CREATE FUNCTION pgp_sym_decrypt_bytea(bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_sym_decrypt_bytea'
 LANGUAGE C IMMUTABLE STRICT;
@@ -102,12 +102,12 @@ LANGUAGE C IMMUTABLE STRICT;
 --
 -- pgp_sym_decrypt(data, key, args)
 --
-CREATE OR REPLACE FUNCTION pgp_sym_decrypt(bytea, text, text)
+CREATE FUNCTION pgp_sym_decrypt(bytea, text, text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pgp_sym_decrypt_text'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_sym_decrypt_bytea(bytea, text, text)
+CREATE FUNCTION pgp_sym_decrypt_bytea(bytea, text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_sym_decrypt_bytea'
 LANGUAGE C IMMUTABLE STRICT;
@@ -115,12 +115,12 @@ LANGUAGE C IMMUTABLE STRICT;
 --
 -- pgp_pub_encrypt(data, key)
 --
-CREATE OR REPLACE FUNCTION pgp_pub_encrypt(text, bytea)
+CREATE FUNCTION pgp_pub_encrypt(text, bytea)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_encrypt_text'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_pub_encrypt_bytea(bytea, bytea)
+CREATE FUNCTION pgp_pub_encrypt_bytea(bytea, bytea)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_encrypt_bytea'
 LANGUAGE C STRICT;
@@ -128,12 +128,12 @@ LANGUAGE C STRICT;
 --
 -- pgp_pub_encrypt(data, key, args)
 --
-CREATE OR REPLACE FUNCTION pgp_pub_encrypt(text, bytea, text)
+CREATE FUNCTION pgp_pub_encrypt(text, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_encrypt_text'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_pub_encrypt_bytea(bytea, bytea, text)
+CREATE FUNCTION pgp_pub_encrypt_bytea(bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_encrypt_bytea'
 LANGUAGE C STRICT;
@@ -141,12 +141,12 @@ LANGUAGE C STRICT;
 --
 -- pgp_pub_decrypt(data, key)
 --
-CREATE OR REPLACE FUNCTION pgp_pub_decrypt(bytea, bytea)
+CREATE FUNCTION pgp_pub_decrypt(bytea, bytea)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pgp_pub_decrypt_text'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_pub_decrypt_bytea(bytea, bytea)
+CREATE FUNCTION pgp_pub_decrypt_bytea(bytea, bytea)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_decrypt_bytea'
 LANGUAGE C IMMUTABLE STRICT;
@@ -154,12 +154,12 @@ LANGUAGE C IMMUTABLE STRICT;
 --
 -- pgp_pub_decrypt(data, key, psw)
 --
-CREATE OR REPLACE FUNCTION pgp_pub_decrypt(bytea, bytea, text)
+CREATE FUNCTION pgp_pub_decrypt(bytea, bytea, text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pgp_pub_decrypt_text'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_pub_decrypt_bytea(bytea, bytea, text)
+CREATE FUNCTION pgp_pub_decrypt_bytea(bytea, bytea, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_decrypt_bytea'
 LANGUAGE C IMMUTABLE STRICT;
@@ -167,12 +167,12 @@ LANGUAGE C IMMUTABLE STRICT;
 --
 -- pgp_pub_decrypt(data, key, psw, arg)
 --
-CREATE OR REPLACE FUNCTION pgp_pub_decrypt(bytea, bytea, text, text)
+CREATE FUNCTION pgp_pub_decrypt(bytea, bytea, text, text)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pgp_pub_decrypt_text'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION pgp_pub_decrypt_bytea(bytea, bytea, text, text)
+CREATE FUNCTION pgp_pub_decrypt_bytea(bytea, bytea, text, text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pgp_pub_decrypt_bytea'
 LANGUAGE C IMMUTABLE STRICT;
@@ -180,7 +180,7 @@ LANGUAGE C IMMUTABLE STRICT;
 --
 -- PGP key ID
 --
-CREATE OR REPLACE FUNCTION pgp_key_id(bytea)
+CREATE FUNCTION pgp_key_id(bytea)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pgp_key_id_w'
 LANGUAGE C IMMUTABLE STRICT;
@@ -188,12 +188,12 @@ LANGUAGE C IMMUTABLE STRICT;
 --
 -- pgp armor
 --
-CREATE OR REPLACE FUNCTION armor(bytea)
+CREATE FUNCTION armor(bytea)
 RETURNS text
 AS 'MODULE_PATHNAME', 'pg_armor'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION dearmor(text)
+CREATE FUNCTION dearmor(text)
 RETURNS bytea
 AS 'MODULE_PATHNAME', 'pg_dearmor'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/pgrowlocks/pgrowlocks--1.0.sql b/contrib/pgrowlocks/pgrowlocks--1.0.sql
index 8b5fc9a1c822811e89e5b063016b834152ab7c5f..0b60fdcd07f6028fd702ebe6f84f64b2bf6d22fe 100644
--- a/contrib/pgrowlocks/pgrowlocks--1.0.sql
+++ b/contrib/pgrowlocks/pgrowlocks--1.0.sql
@@ -1,6 +1,6 @@
 /* contrib/pgrowlocks/pgrowlocks--1.0.sql */
 
-CREATE OR REPLACE FUNCTION pgrowlocks(IN relname text,
+CREATE FUNCTION pgrowlocks(IN relname text,
     OUT locked_row TID,		-- row TID
     OUT lock_type TEXT,		-- lock type
     OUT locker XID,		-- locking XID
diff --git a/contrib/pgstattuple/pgstattuple--1.0.sql b/contrib/pgstattuple/pgstattuple--1.0.sql
index 84b91dda0ac49f5a5055edce47a319eeda9d828d..83445ec4aee6e9be53310db73cab09a6c321203f 100644
--- a/contrib/pgstattuple/pgstattuple--1.0.sql
+++ b/contrib/pgstattuple/pgstattuple--1.0.sql
@@ -1,6 +1,6 @@
 /* contrib/pgstattuple/pgstattuple--1.0.sql */
 
-CREATE OR REPLACE FUNCTION pgstattuple(IN relname text,
+CREATE FUNCTION pgstattuple(IN relname text,
     OUT table_len BIGINT,		-- physical table length in bytes
     OUT tuple_count BIGINT,		-- number of live tuples
     OUT tuple_len BIGINT,		-- total tuples length in bytes
@@ -13,7 +13,7 @@ CREATE OR REPLACE FUNCTION pgstattuple(IN relname text,
 AS 'MODULE_PATHNAME', 'pgstattuple'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pgstattuple(IN reloid oid,
+CREATE FUNCTION pgstattuple(IN reloid oid,
     OUT table_len BIGINT,		-- physical table length in bytes
     OUT tuple_count BIGINT,		-- number of live tuples
     OUT tuple_len BIGINT,		-- total tuples length in bytes
@@ -26,7 +26,7 @@ CREATE OR REPLACE FUNCTION pgstattuple(IN reloid oid,
 AS 'MODULE_PATHNAME', 'pgstattuplebyid'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pgstatindex(IN relname text,
+CREATE FUNCTION pgstatindex(IN relname text,
     OUT version INT,
     OUT tree_level INT,
     OUT index_size BIGINT,
@@ -40,7 +40,7 @@ CREATE OR REPLACE FUNCTION pgstatindex(IN relname text,
 AS 'MODULE_PATHNAME', 'pgstatindex'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION pg_relpages(IN relname text)
+CREATE FUNCTION pg_relpages(IN relname text)
 RETURNS BIGINT
 AS 'MODULE_PATHNAME', 'pg_relpages'
 LANGUAGE C STRICT;
diff --git a/contrib/seg/seg--1.0.sql b/contrib/seg/seg--1.0.sql
index 02d8ffadb0a03e1531bd11cc57bf9759315d8e3b..563411da6a0e1ff787bbf2023bc18740ed90dda5 100644
--- a/contrib/seg/seg--1.0.sql
+++ b/contrib/seg/seg--1.0.sql
@@ -2,12 +2,12 @@
 
 -- Create the user-defined type for 1-D floating point intervals (seg)
 
-CREATE OR REPLACE FUNCTION seg_in(cstring)
+CREATE FUNCTION seg_in(cstring)
 RETURNS seg
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION seg_out(seg)
+CREATE FUNCTION seg_out(seg)
 RETURNS cstring
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -27,7 +27,7 @@ COMMENT ON TYPE seg IS
 
 -- Left/Right methods
 
-CREATE OR REPLACE FUNCTION seg_over_left(seg, seg)
+CREATE FUNCTION seg_over_left(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -35,7 +35,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_over_left(seg, seg) IS
 'overlaps or is left of';
 
-CREATE OR REPLACE FUNCTION seg_over_right(seg, seg)
+CREATE FUNCTION seg_over_right(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -43,7 +43,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_over_right(seg, seg) IS
 'overlaps or is right of';
 
-CREATE OR REPLACE FUNCTION seg_left(seg, seg)
+CREATE FUNCTION seg_left(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -51,7 +51,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_left(seg, seg) IS
 'is left of';
 
-CREATE OR REPLACE FUNCTION seg_right(seg, seg)
+CREATE FUNCTION seg_right(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -62,7 +62,7 @@ COMMENT ON FUNCTION seg_right(seg, seg) IS
 
 -- Scalar comparison methods
 
-CREATE OR REPLACE FUNCTION seg_lt(seg, seg)
+CREATE FUNCTION seg_lt(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -70,7 +70,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_lt(seg, seg) IS
 'less than';
 
-CREATE OR REPLACE FUNCTION seg_le(seg, seg)
+CREATE FUNCTION seg_le(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -78,7 +78,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_le(seg, seg) IS
 'less than or equal';
 
-CREATE OR REPLACE FUNCTION seg_gt(seg, seg)
+CREATE FUNCTION seg_gt(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -86,7 +86,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_gt(seg, seg) IS
 'greater than';
 
-CREATE OR REPLACE FUNCTION seg_ge(seg, seg)
+CREATE FUNCTION seg_ge(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -94,7 +94,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_ge(seg, seg) IS
 'greater than or equal';
 
-CREATE OR REPLACE FUNCTION seg_contains(seg, seg)
+CREATE FUNCTION seg_contains(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -102,7 +102,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_contains(seg, seg) IS
 'contains';
 
-CREATE OR REPLACE FUNCTION seg_contained(seg, seg)
+CREATE FUNCTION seg_contained(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -110,7 +110,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_contained(seg, seg) IS
 'contained in';
 
-CREATE OR REPLACE FUNCTION seg_overlap(seg, seg)
+CREATE FUNCTION seg_overlap(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -118,7 +118,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_overlap(seg, seg) IS
 'overlaps';
 
-CREATE OR REPLACE FUNCTION seg_same(seg, seg)
+CREATE FUNCTION seg_same(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -126,7 +126,7 @@ LANGUAGE C STRICT IMMUTABLE;
 COMMENT ON FUNCTION seg_same(seg, seg) IS
 'same as';
 
-CREATE OR REPLACE FUNCTION seg_different(seg, seg)
+CREATE FUNCTION seg_different(seg, seg)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -136,41 +136,41 @@ COMMENT ON FUNCTION seg_different(seg, seg) IS
 
 -- support routines for indexing
 
-CREATE OR REPLACE FUNCTION seg_cmp(seg, seg)
+CREATE FUNCTION seg_cmp(seg, seg)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 COMMENT ON FUNCTION seg_cmp(seg, seg) IS 'btree comparison function';
 
-CREATE OR REPLACE FUNCTION seg_union(seg, seg)
+CREATE FUNCTION seg_union(seg, seg)
 RETURNS seg
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION seg_inter(seg, seg)
+CREATE FUNCTION seg_inter(seg, seg)
 RETURNS seg
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION seg_size(seg)
+CREATE FUNCTION seg_size(seg)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 -- miscellaneous
 
-CREATE OR REPLACE FUNCTION seg_center(seg)
+CREATE FUNCTION seg_center(seg)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION seg_upper(seg)
+CREATE FUNCTION seg_upper(seg)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION seg_lower(seg)
+CREATE FUNCTION seg_lower(seg)
 RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
@@ -323,37 +323,37 @@ CREATE OPERATOR ~ (
 
 
 -- define the GiST support methods
-CREATE OR REPLACE FUNCTION gseg_consistent(internal,seg,int,oid,internal)
+CREATE FUNCTION gseg_consistent(internal,seg,int,oid,internal)
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gseg_compress(internal)
+CREATE FUNCTION gseg_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gseg_decompress(internal)
+CREATE FUNCTION gseg_decompress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gseg_penalty(internal,internal,internal)
+CREATE FUNCTION gseg_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gseg_picksplit(internal, internal)
+CREATE FUNCTION gseg_picksplit(internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gseg_union(internal, internal)
+CREATE FUNCTION gseg_union(internal, internal)
 RETURNS seg
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
-CREATE OR REPLACE FUNCTION gseg_same(seg, seg, internal)
+CREATE FUNCTION gseg_same(seg, seg, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
diff --git a/contrib/spi/autoinc--1.0.sql b/contrib/spi/autoinc--1.0.sql
index bf5ecab08b5e50e6353b7988ed1005ed6268a0e3..9c9df9ce0bdce2f760e9e19b619ba6fb7554d3a2 100644
--- a/contrib/spi/autoinc--1.0.sql
+++ b/contrib/spi/autoinc--1.0.sql
@@ -1,6 +1,6 @@
 /* contrib/spi/autoinc--1.0.sql */
 
-CREATE OR REPLACE FUNCTION autoinc()
+CREATE FUNCTION autoinc()
 RETURNS trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
diff --git a/contrib/spi/insert_username--1.0.sql b/contrib/spi/insert_username--1.0.sql
index 3867c57a2cc680a3c9f2d755618460cc1de05fc3..bd854587e0316fc1061479594d80a125f4929046 100644
--- a/contrib/spi/insert_username--1.0.sql
+++ b/contrib/spi/insert_username--1.0.sql
@@ -1,6 +1,6 @@
 /* contrib/spi/insert_username--1.0.sql */
 
-CREATE OR REPLACE FUNCTION insert_username()
+CREATE FUNCTION insert_username()
 RETURNS trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
diff --git a/contrib/spi/moddatetime--1.0.sql b/contrib/spi/moddatetime--1.0.sql
index 00971c9fe1e275a274d37e14e225e0477ccf40f3..97cc63289fe97c2f28e74ed9706a5c8c7a9f0ea5 100644
--- a/contrib/spi/moddatetime--1.0.sql
+++ b/contrib/spi/moddatetime--1.0.sql
@@ -1,6 +1,6 @@
 /* contrib/spi/moddatetime--1.0.sql */
 
-CREATE OR REPLACE FUNCTION moddatetime()
+CREATE FUNCTION moddatetime()
 RETURNS trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
diff --git a/contrib/spi/refint--1.0.sql b/contrib/spi/refint--1.0.sql
index 5a50226c436eddad5ad42e570cbf4dd203dd52f5..9e5d931df5ec8275564be270f72d30f36b54e4ef 100644
--- a/contrib/spi/refint--1.0.sql
+++ b/contrib/spi/refint--1.0.sql
@@ -1,11 +1,11 @@
 /* contrib/spi/refint--1.0.sql */
 
-CREATE OR REPLACE FUNCTION check_primary_key()
+CREATE FUNCTION check_primary_key()
 RETURNS trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION check_foreign_key()
+CREATE FUNCTION check_foreign_key()
 RETURNS trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
diff --git a/contrib/spi/timetravel--1.0.sql b/contrib/spi/timetravel--1.0.sql
index c9f786218f2cd19b1f456ed3b91dad98afe5d012..b68cf2f2475c01430467a1723225f4b2d70d2d37 100644
--- a/contrib/spi/timetravel--1.0.sql
+++ b/contrib/spi/timetravel--1.0.sql
@@ -1,16 +1,16 @@
 /* contrib/spi/timetravel--1.0.sql */
 
-CREATE OR REPLACE FUNCTION timetravel()
+CREATE FUNCTION timetravel()
 RETURNS trigger
 AS 'MODULE_PATHNAME'
 LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION set_timetravel(name, int4)
+CREATE FUNCTION set_timetravel(name, int4)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C RETURNS NULL ON NULL INPUT;
 
-CREATE OR REPLACE FUNCTION get_timetravel(name)
+CREATE FUNCTION get_timetravel(name)
 RETURNS int4
 AS 'MODULE_PATHNAME'
 LANGUAGE C RETURNS NULL ON NULL INPUT;
diff --git a/contrib/sslinfo/sslinfo--1.0.sql b/contrib/sslinfo/sslinfo--1.0.sql
index 37007e59f7ce801193f5ec774dd4ebafbc7c7f0d..ef745a0a2e6c2717f62296a5441a8aee3a225114 100644
--- a/contrib/sslinfo/sslinfo--1.0.sql
+++ b/contrib/sslinfo/sslinfo--1.0.sql
@@ -1,37 +1,37 @@
 /* contrib/sslinfo/sslinfo--1.0.sql */
 
-CREATE OR REPLACE FUNCTION ssl_client_serial() RETURNS numeric
+CREATE FUNCTION ssl_client_serial() RETURNS numeric
 AS 'MODULE_PATHNAME', 'ssl_client_serial'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_is_used() RETURNS boolean
+CREATE FUNCTION ssl_is_used() RETURNS boolean
 AS 'MODULE_PATHNAME', 'ssl_is_used'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_version() RETURNS text
+CREATE FUNCTION ssl_version() RETURNS text
 AS 'MODULE_PATHNAME', 'ssl_version'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_cipher() RETURNS text
+CREATE FUNCTION ssl_cipher() RETURNS text
 AS 'MODULE_PATHNAME', 'ssl_cipher'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_client_cert_present() RETURNS boolean
+CREATE FUNCTION ssl_client_cert_present() RETURNS boolean
 AS 'MODULE_PATHNAME', 'ssl_client_cert_present'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_client_dn_field(text) RETURNS text
+CREATE FUNCTION ssl_client_dn_field(text) RETURNS text
 AS 'MODULE_PATHNAME', 'ssl_client_dn_field'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_issuer_field(text) RETURNS text
+CREATE FUNCTION ssl_issuer_field(text) RETURNS text
 AS 'MODULE_PATHNAME', 'ssl_issuer_field'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_client_dn() RETURNS text
+CREATE FUNCTION ssl_client_dn() RETURNS text
 AS 'MODULE_PATHNAME', 'ssl_client_dn'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION ssl_issuer_dn() RETURNS text
+CREATE FUNCTION ssl_issuer_dn() RETURNS text
 AS 'MODULE_PATHNAME', 'ssl_issuer_dn'
 LANGUAGE C STRICT;
diff --git a/contrib/tablefunc/tablefunc--1.0.sql b/contrib/tablefunc/tablefunc--1.0.sql
index 63dd8c4634cb59b774397b7d093a9b80f767b428..7bf117cb5c0fcd4ab990368ea181142fb3b117ab 100644
--- a/contrib/tablefunc/tablefunc--1.0.sql
+++ b/contrib/tablefunc/tablefunc--1.0.sql
@@ -1,12 +1,12 @@
 /* contrib/tablefunc/tablefunc--1.0.sql */
 
-CREATE OR REPLACE FUNCTION normal_rand(int4, float8, float8)
+CREATE FUNCTION normal_rand(int4, float8, float8)
 RETURNS setof float8
 AS 'MODULE_PATHNAME','normal_rand'
 LANGUAGE C VOLATILE STRICT;
 
 -- the generic crosstab function:
-CREATE OR REPLACE FUNCTION crosstab(text)
+CREATE FUNCTION crosstab(text)
 RETURNS setof record
 AS 'MODULE_PATHNAME','crosstab'
 LANGUAGE C STABLE STRICT;
@@ -36,50 +36,50 @@ CREATE TYPE tablefunc_crosstab_4 AS
 	category_4 TEXT
 );
 
-CREATE OR REPLACE FUNCTION crosstab2(text)
+CREATE FUNCTION crosstab2(text)
 RETURNS setof tablefunc_crosstab_2
 AS 'MODULE_PATHNAME','crosstab'
 LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION crosstab3(text)
+CREATE FUNCTION crosstab3(text)
 RETURNS setof tablefunc_crosstab_3
 AS 'MODULE_PATHNAME','crosstab'
 LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION crosstab4(text)
+CREATE FUNCTION crosstab4(text)
 RETURNS setof tablefunc_crosstab_4
 AS 'MODULE_PATHNAME','crosstab'
 LANGUAGE C STABLE STRICT;
 
 -- obsolete:
-CREATE OR REPLACE FUNCTION crosstab(text,int)
+CREATE FUNCTION crosstab(text,int)
 RETURNS setof record
 AS 'MODULE_PATHNAME','crosstab'
 LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION crosstab(text,text)
+CREATE FUNCTION crosstab(text,text)
 RETURNS setof record
 AS 'MODULE_PATHNAME','crosstab_hash'
 LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION connectby(text,text,text,text,int,text)
+CREATE FUNCTION connectby(text,text,text,text,int,text)
 RETURNS setof record
 AS 'MODULE_PATHNAME','connectby_text'
 LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION connectby(text,text,text,text,int)
+CREATE FUNCTION connectby(text,text,text,text,int)
 RETURNS setof record
 AS 'MODULE_PATHNAME','connectby_text'
 LANGUAGE C STABLE STRICT;
 
 -- These 2 take the name of a field to ORDER BY as 4th arg (for sorting siblings)
 
-CREATE OR REPLACE FUNCTION connectby(text,text,text,text,text,int,text)
+CREATE FUNCTION connectby(text,text,text,text,text,int,text)
 RETURNS setof record
 AS 'MODULE_PATHNAME','connectby_text_serial'
 LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION connectby(text,text,text,text,text,int)
+CREATE FUNCTION connectby(text,text,text,text,text,int)
 RETURNS setof record
 AS 'MODULE_PATHNAME','connectby_text_serial'
 LANGUAGE C STABLE STRICT;
diff --git a/contrib/test_parser/test_parser--1.0.sql b/contrib/test_parser/test_parser--1.0.sql
index fb785a1c4a06817e2055164f21e90d4a6a47f7ab..5b8b04bb05b26fb20651051d785d617283633460 100644
--- a/contrib/test_parser/test_parser--1.0.sql
+++ b/contrib/test_parser/test_parser--1.0.sql
@@ -1,21 +1,21 @@
 /* contrib/test_parser/test_parser--1.0.sql */
 
-CREATE OR REPLACE FUNCTION testprs_start(internal, int4)
+CREATE FUNCTION testprs_start(internal, int4)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION testprs_getlexeme(internal, internal, internal)
+CREATE FUNCTION testprs_getlexeme(internal, internal, internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION testprs_end(internal)
+CREATE FUNCTION testprs_end(internal)
 RETURNS void
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
-CREATE OR REPLACE FUNCTION testprs_lextype(internal)
+CREATE FUNCTION testprs_lextype(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
diff --git a/contrib/tsearch2/tsearch2--1.0.sql b/contrib/tsearch2/tsearch2--1.0.sql
index 40386a4c2a61ecd7c29bed8fb9a9e134a96d7fc2..369507e8f56006f30465925bfdf13b7a7e6699b4 100644
--- a/contrib/tsearch2/tsearch2--1.0.sql
+++ b/contrib/tsearch2/tsearch2--1.0.sql
@@ -435,7 +435,7 @@ create type tsdebug as (
         "tsvector" tsvector
 );
 
-CREATE or replace FUNCTION _get_parser_from_curcfg()
+CREATE FUNCTION _get_parser_from_curcfg()
 RETURNS text as
 $$select prsname::text from pg_catalog.pg_ts_parser p join pg_ts_config c on cfgparser = p.oid where c.oid = show_curcfg();$$
 LANGUAGE SQL RETURNS NULL ON NULL INPUT IMMUTABLE;
@@ -461,25 +461,25 @@ where
         t.tokid = p.tokid
 $$ LANGUAGE SQL RETURNS NULL ON NULL INPUT;
 
-CREATE OR REPLACE FUNCTION numnode(tsquery)
+CREATE FUNCTION numnode(tsquery)
         RETURNS int4
         as 'tsquery_numnode'
         LANGUAGE INTERNAL
         RETURNS NULL ON NULL INPUT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION tsquery_and(tsquery,tsquery)
+CREATE FUNCTION tsquery_and(tsquery,tsquery)
         RETURNS tsquery
         as 'tsquery_and'
         LANGUAGE INTERNAL
         RETURNS NULL ON NULL INPUT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION tsquery_or(tsquery,tsquery)
+CREATE FUNCTION tsquery_or(tsquery,tsquery)
         RETURNS tsquery
         as 'tsquery_or'
         LANGUAGE INTERNAL
         RETURNS NULL ON NULL INPUT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION tsquery_not(tsquery)
+CREATE FUNCTION tsquery_not(tsquery)
         RETURNS tsquery
         as 'tsquery_not'
         LANGUAGE INTERNAL
@@ -487,24 +487,24 @@ CREATE OR REPLACE FUNCTION tsquery_not(tsquery)
 
 --------------rewrite subsystem
 
-CREATE OR REPLACE FUNCTION rewrite(tsquery, text)
+CREATE FUNCTION rewrite(tsquery, text)
         RETURNS tsquery
         as 'tsquery_rewrite_query'
         LANGUAGE INTERNAL
         RETURNS NULL ON NULL INPUT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION rewrite(tsquery, tsquery, tsquery)
+CREATE FUNCTION rewrite(tsquery, tsquery, tsquery)
         RETURNS tsquery
         as 'tsquery_rewrite'
         LANGUAGE INTERNAL
         RETURNS NULL ON NULL INPUT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION rewrite_accum(tsquery,tsquery[])
+CREATE FUNCTION rewrite_accum(tsquery,tsquery[])
         RETURNS tsquery
         AS 'MODULE_PATHNAME', 'tsa_rewrite_accum'
         LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION rewrite_finish(tsquery)
+CREATE FUNCTION rewrite_finish(tsquery)
       RETURNS tsquery
       as 'MODULE_PATHNAME', 'tsa_rewrite_finish'
       LANGUAGE C;
@@ -516,13 +516,13 @@ CREATE AGGREGATE rewrite (
       FINALFUNC = rewrite_finish
 );
 
-CREATE OR REPLACE FUNCTION tsq_mcontains(tsquery, tsquery)
+CREATE FUNCTION tsq_mcontains(tsquery, tsquery)
         RETURNS bool
         as 'tsq_mcontains'
         LANGUAGE INTERNAL
         RETURNS NULL ON NULL INPUT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION tsq_mcontained(tsquery, tsquery)
+CREATE FUNCTION tsq_mcontained(tsquery, tsquery)
         RETURNS bool
         as 'tsq_mcontained'
         LANGUAGE INTERNAL
diff --git a/contrib/unaccent/unaccent--1.0.sql b/contrib/unaccent/unaccent--1.0.sql
index 4dc9c3d9c66efa81e56dfc3456a2fcb4298ac85e..b5909e0b556f38ed9853d62d2d790da99d1746d1 100644
--- a/contrib/unaccent/unaccent--1.0.sql
+++ b/contrib/unaccent/unaccent--1.0.sql
@@ -1,21 +1,21 @@
 /* contrib/unaccent/unaccent--1.0.sql */
 
-CREATE OR REPLACE FUNCTION unaccent(regdictionary, text)
+CREATE FUNCTION unaccent(regdictionary, text)
 	RETURNS text
 	AS 'MODULE_PATHNAME', 'unaccent_dict'
 	LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION unaccent(text)
+CREATE FUNCTION unaccent(text)
 	RETURNS text
 	AS 'MODULE_PATHNAME', 'unaccent_dict'
 	LANGUAGE C STABLE STRICT;
 
-CREATE OR REPLACE FUNCTION unaccent_init(internal)
+CREATE FUNCTION unaccent_init(internal)
 	RETURNS internal
 	AS 'MODULE_PATHNAME', 'unaccent_init'
 	LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION unaccent_lexize(internal,internal,internal,internal)
+CREATE FUNCTION unaccent_lexize(internal,internal,internal,internal)
 	RETURNS internal
 	AS 'MODULE_PATHNAME', 'unaccent_lexize'
 	LANGUAGE C;
diff --git a/contrib/uuid-ossp/uuid-ossp--1.0.sql b/contrib/uuid-ossp/uuid-ossp--1.0.sql
index 34b32de77e0bd22467d5bcb5adb5f69eca3797f8..43ae0b38a0bb186dfea8648dd4944369e1c098bf 100644
--- a/contrib/uuid-ossp/uuid-ossp--1.0.sql
+++ b/contrib/uuid-ossp/uuid-ossp--1.0.sql
@@ -1,51 +1,51 @@
 /* contrib/uuid-ossp/uuid-ossp--1.0.sql */
 
-CREATE OR REPLACE FUNCTION uuid_nil()
+CREATE FUNCTION uuid_nil()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_nil'
 IMMUTABLE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_ns_dns()
+CREATE FUNCTION uuid_ns_dns()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_ns_dns'
 IMMUTABLE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_ns_url()
+CREATE FUNCTION uuid_ns_url()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_ns_url'
 IMMUTABLE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_ns_oid()
+CREATE FUNCTION uuid_ns_oid()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_ns_oid'
 IMMUTABLE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_ns_x500()
+CREATE FUNCTION uuid_ns_x500()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_ns_x500'
 IMMUTABLE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_generate_v1()
+CREATE FUNCTION uuid_generate_v1()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_generate_v1'
 VOLATILE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_generate_v1mc()
+CREATE FUNCTION uuid_generate_v1mc()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_generate_v1mc'
 VOLATILE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_generate_v3(namespace uuid, name text)
+CREATE FUNCTION uuid_generate_v3(namespace uuid, name text)
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_generate_v3'
 IMMUTABLE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_generate_v4()
+CREATE FUNCTION uuid_generate_v4()
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_generate_v4'
 VOLATILE STRICT LANGUAGE C;
 
-CREATE OR REPLACE FUNCTION uuid_generate_v5(namespace uuid, name text)
+CREATE FUNCTION uuid_generate_v5(namespace uuid, name text)
 RETURNS uuid
 AS 'MODULE_PATHNAME', 'uuid_generate_v5'
 IMMUTABLE STRICT LANGUAGE C;
diff --git a/contrib/xml2/xml2--1.0.sql b/contrib/xml2/xml2--1.0.sql
index 100f57291fafe4a472ca56116f8d8970fdc86514..bc27dc89ca5ebbbdfc474740b2987352ae1393af 100644
--- a/contrib/xml2/xml2--1.0.sql
+++ b/contrib/xml2/xml2--1.0.sql
@@ -3,68 +3,68 @@
 --SQL for XML parser
 
 -- deprecated old name for xml_is_well_formed
-CREATE OR REPLACE FUNCTION xml_valid(text) RETURNS bool
+CREATE FUNCTION xml_valid(text) RETURNS bool
 AS 'xml_is_well_formed'
 LANGUAGE INTERNAL STRICT STABLE;
 
-CREATE OR REPLACE FUNCTION xml_encode_special_chars(text) RETURNS text
+CREATE FUNCTION xml_encode_special_chars(text) RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION xpath_string(text,text) RETURNS text
+CREATE FUNCTION xpath_string(text,text) RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION xpath_nodeset(text,text,text,text) RETURNS text
+CREATE FUNCTION xpath_nodeset(text,text,text,text) RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION xpath_number(text,text) RETURNS float4
+CREATE FUNCTION xpath_number(text,text) RETURNS float4
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION xpath_bool(text,text) RETURNS boolean
+CREATE FUNCTION xpath_bool(text,text) RETURNS boolean
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
 -- List function
 
-CREATE OR REPLACE FUNCTION xpath_list(text,text,text) RETURNS text
+CREATE FUNCTION xpath_list(text,text,text) RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION xpath_list(text,text) RETURNS text
+CREATE FUNCTION xpath_list(text,text) RETURNS text
 AS 'SELECT xpath_list($1,$2,'','')'
 LANGUAGE SQL STRICT IMMUTABLE;
 
 -- Wrapper functions for nodeset where no tags needed
 
-CREATE OR REPLACE FUNCTION xpath_nodeset(text,text)
+CREATE FUNCTION xpath_nodeset(text,text)
 RETURNS text
 AS 'SELECT xpath_nodeset($1,$2,'''','''')'
 LANGUAGE SQL STRICT IMMUTABLE;
 
-CREATE OR REPLACE FUNCTION xpath_nodeset(text,text,text)
+CREATE FUNCTION xpath_nodeset(text,text,text)
 RETURNS text
 AS 'SELECT xpath_nodeset($1,$2,'''',$3)'
 LANGUAGE SQL STRICT IMMUTABLE;
 
 -- Table function
 
-CREATE OR REPLACE FUNCTION xpath_table(text,text,text,text,text)
+CREATE FUNCTION xpath_table(text,text,text,text,text)
 RETURNS setof record
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT STABLE;
 
 -- XSLT functions
 
-CREATE OR REPLACE FUNCTION xslt_process(text,text,text)
+CREATE FUNCTION xslt_process(text,text,text)
 RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT VOLATILE;
 
 -- the function checks for the correct argument count
-CREATE OR REPLACE FUNCTION xslt_process(text,text)
+CREATE FUNCTION xslt_process(text,text)
 RETURNS text
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT IMMUTABLE;