From 7d03a83f4d0736ba869fa6f93973f7623a27038a Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Wed, 19 Feb 2014 08:35:23 -0500
Subject: [PATCH] Add a pg_lsn data type, to represent an LSN.
Robert Haas and Michael Paquier
---
doc/src/sgml/datatype.sgml | 32 +++++
src/backend/utils/adt/Makefile | 2 +-
src/backend/utils/adt/pg_lsn.c | 180 +++++++++++++++++++++++++++
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_operator.h | 16 +++
src/include/catalog/pg_proc.h | 17 +++
src/include/catalog/pg_type.h | 5 +
src/include/fmgr.h | 2 +
src/include/postgres.h | 14 +++
src/include/utils/pg_lsn.h | 34 +++++
src/test/regress/expected/pg_lsn.out | 62 +++++++++
src/test/regress/parallel_schedule | 2 +-
src/test/regress/serial_schedule | 1 +
src/test/regress/sql/pg_lsn.sql | 25 ++++
14 files changed, 391 insertions(+), 3 deletions(-)
create mode 100644 src/backend/utils/adt/pg_lsn.c
create mode 100644 src/include/utils/pg_lsn.h
create mode 100644 src/test/regress/expected/pg_lsn.out
create mode 100644 src/test/regress/sql/pg_lsn.sql
diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index 30fd9bb598d..00ccbe1bb5f 100644
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -180,6 +180,12 @@
<entry>geometric path on a plane</entry>
</row>
+ <row>
+ <entry><type>pg_lsn</type></entry>
+ <entry></entry>
+ <entry><productname>PostgreSQL</productname> Log Sequence Number</entry>
+ </row>
+
<row>
<entry><type>point</type></entry>
<entry></entry>
@@ -4504,6 +4510,32 @@ SELECT * FROM pg_attribute
</para>
</sect1>
+ <sect1 id="datatype-pg-lsn">
+ <title><acronym>pg_lsn Type</acronym></title>
+
+ <indexterm zone="datatype-pg-lsn">
+ <primary>pg_lsn</primary>
+ </indexterm>
+
+ <para>
+ The <type>pg_lsn</type> data type can be used to store LSN (Log Sequence
+ Number) data which is a pointer to a location in the XLOG. This type is a
+ representation of XLogRecPtr and an internal system type of
+ <productname>PostgreSQL</productname>.
+ </para>
+
+ <para>
+ Internally, an LSN is a 64-bit integer, representing a byte position in
+ the write-ahead log stream. It is printed as two hexadecimal numbers of
+ up to 8 digits each, separated by a slash; for example,
+ <literal>16/B374D848</>. The <type>pg_lsn</type> type supports the
+ standard comparison operators, like <literal>=</literal> and
+ <literal>></literal>. Two LSNs can be subtracted using the
+ <literal>-</literal> operator; the result is the number of bytes separating
+ those write-ahead log positions.
+ </para>
+ </sect1>
+
<sect1 id="datatype-pseudo">
<title>Pseudo-Types</title>
diff --git a/src/backend/utils/adt/Makefile b/src/backend/utils/adt/Makefile
index 51355754d5a..644687954b2 100644
--- a/src/backend/utils/adt/Makefile
+++ b/src/backend/utils/adt/Makefile
@@ -24,7 +24,7 @@ OBJS = acl.o arrayfuncs.o array_selfuncs.o array_typanalyze.o \
int8.o json.o jsonfuncs.o like.o \
lockfuncs.o mac.o misc.o nabstime.o name.o network.o numeric.o \
numutils.o oid.o oracle_compat.o orderedsetaggs.o \
- pg_lzcompress.o pg_locale.o pgstatfuncs.o \
+ pg_lzcompress.o pg_locale.o pg_lsn.o pgstatfuncs.o \
pseudotypes.o quote.o rangetypes.o rangetypes_gist.o \
rangetypes_selfuncs.o rangetypes_spgist.o rangetypes_typanalyze.o \
regexp.o regproc.o ri_triggers.o rowtypes.o ruleutils.o \
diff --git a/src/backend/utils/adt/pg_lsn.c b/src/backend/utils/adt/pg_lsn.c
new file mode 100644
index 00000000000..39e22931362
--- /dev/null
+++ b/src/backend/utils/adt/pg_lsn.c
@@ -0,0 +1,180 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_lsn.c
+ * Internal PostgreSQL LSN operations
+ *
+ * Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ * src/backend/utils/adt/pg_lsn.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "funcapi.h"
+#include "libpq/pqformat.h"
+#include "utils/builtins.h"
+#include "utils/pg_lsn.h"
+
+#define MAXPG_LSNLEN 17
+#define MAXPG_LSNCOMPONENT 8
+
+/*----------------------------------------------------------
+ * Formatting and conversion routines.
+ *---------------------------------------------------------*/
+
+Datum
+pg_lsn_in(PG_FUNCTION_ARGS)
+{
+ char *str = PG_GETARG_CSTRING(0);
+ int len1, len2;
+ uint32 id, off;
+ XLogRecPtr result;
+
+ /* Sanity check input format. */
+ len1 = strspn(str, "0123456789abcdefABCDEF");
+ if (len1 < 1 || len1 > MAXPG_LSNCOMPONENT || str[len1] != '/')
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for transaction log location: \"%s\"", str)));
+ len2 = strspn(str + len1 + 1, "0123456789abcdefABCDEF");
+ if (len2 < 1 || len2 > MAXPG_LSNCOMPONENT || str[len1 + 1 + len2] != '\0')
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for transaction log location: \"%s\"", str)));
+
+ /* Decode result. */
+ id = (uint32) strtoul(str, NULL, 16);
+ off = (uint32) strtoul(str + len1 + 1, NULL, 16);
+ result = (XLogRecPtr) ((uint64) id << 32) | off;
+
+ PG_RETURN_PG_LSN(result);
+}
+
+Datum
+pg_lsn_out(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ char buf[MAXPG_LSNLEN + 1];
+ char *result;
+ uint32 id, off;
+
+ /* Decode ID and offset */
+ id = (uint32) (lsn >> 32);
+ off = (uint32) lsn;
+
+ snprintf(buf, sizeof buf, "%X/%X", id, off);
+ result = pstrdup(buf);
+ PG_RETURN_CSTRING(result);
+}
+
+Datum
+pg_lsn_recv(PG_FUNCTION_ARGS)
+{
+ StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
+ XLogRecPtr result;
+
+ result = pq_getmsgint64(buf);
+ PG_RETURN_PG_LSN(result);
+}
+
+Datum
+pg_lsn_send(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ StringInfoData buf;
+
+ pq_begintypsend(&buf);
+ pq_sendint64(&buf, lsn);
+ PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
+}
+
+
+/*----------------------------------------------------------
+ * Operators for PostgreSQL LSNs
+ *---------------------------------------------------------*/
+
+Datum
+pg_lsn_eq(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+
+ PG_RETURN_BOOL(lsn1 == lsn2);
+}
+
+Datum
+pg_lsn_ne(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+
+ PG_RETURN_BOOL(lsn1 != lsn2);
+}
+
+Datum
+pg_lsn_lt(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+
+ PG_RETURN_BOOL(lsn1 < lsn2);
+}
+
+Datum
+pg_lsn_gt(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+
+ PG_RETURN_BOOL(lsn1 > lsn2);
+}
+
+Datum
+pg_lsn_le(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+
+ PG_RETURN_BOOL(lsn1 <= lsn2);
+}
+
+Datum
+pg_lsn_ge(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+
+ PG_RETURN_BOOL(lsn1 >= lsn2);
+}
+
+
+/*----------------------------------------------------------
+ * Arithmetic operators on PostgreSQL LSNs.
+ *---------------------------------------------------------*/
+
+Datum
+pg_lsn_mi(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr lsn1 = (XLogRecPtr) PG_GETARG_PG_LSN(0);
+ XLogRecPtr lsn2 = (XLogRecPtr) PG_GETARG_PG_LSN(1);
+ char buf[256];
+ Datum result;
+
+ /* Negative results are not allowed. */
+ if (lsn1 < lsn2)
+ ereport(ERROR,
+ (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+ errmsg("transaction log location out of range")));
+
+ /* Convert to numeric. */
+ snprintf(buf, sizeof buf, UINT64_FORMAT, lsn1 - lsn2);
+ result = DirectFunctionCall3(numeric_in,
+ CStringGetDatum(buf),
+ ObjectIdGetDatum(0),
+ Int32GetDatum(-1));
+
+ return result;
+}
diff --git a/src/include/catalog/catversion.h b/src/include/catalog/catversion.h
index 9263b0df7a0..cd1afc842df 100644
--- a/src/include/catalog/catversion.h
+++ b/src/include/catalog/catversion.h
@@ -53,6 +53,6 @@
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 201402031
+#define CATALOG_VERSION_NO 201402191
#endif
diff --git a/src/include/catalog/pg_operator.h b/src/include/catalog/pg_operator.h
index 6aa48907821..e07d6d9ef97 100644
--- a/src/include/catalog/pg_operator.h
+++ b/src/include/catalog/pg_operator.h
@@ -1592,6 +1592,22 @@ DESCR("less than or equal");
DATA(insert OID = 2977 ( ">=" PGNSP PGUID b f f 2950 2950 16 2976 2974 uuid_ge scalargtsel scalargtjoinsel ));
DESCR("greater than or equal");
+/* pg_lsn operators */
+DATA(insert OID = 3222 ( "=" PGNSP PGUID b f f 3220 3220 16 3222 3223 pg_lsn_eq eqsel eqjoinsel ));
+DESCR("equal");
+DATA(insert OID = 3223 ( "<>" PGNSP PGUID b f f 3220 3220 16 3223 3222 pg_lsn_ne neqsel neqjoinsel ));
+DESCR("not equal");
+DATA(insert OID = 3224 ( "<" PGNSP PGUID b f f 3220 3220 16 3225 3227 pg_lsn_lt scalarltsel scalarltjoinsel ));
+DESCR("less than");
+DATA(insert OID = 3225 ( ">" PGNSP PGUID b f f 3220 3220 16 3224 3226 pg_lsn_gt scalargtsel scalargtjoinsel ));
+DESCR("greater than");
+DATA(insert OID = 3226 ( "<=" PGNSP PGUID b f f 3220 3220 16 3227 3225 pg_lsn_le scalarltsel scalarltjoinsel ));
+DESCR("less than or equal");
+DATA(insert OID = 3227 ( ">=" PGNSP PGUID b f f 3220 3220 16 3226 3224 pg_lsn_ge scalargtsel scalargtjoinsel ));
+DESCR("greater than or equal");
+DATA(insert OID = 3228 ( "-" PGNSP PGUID b f f 3220 3220 1700 0 0 pg_lsn_mi - - ));
+DESCR("minus");
+
/* enum operators */
DATA(insert OID = 3516 ( "=" PGNSP PGUID b t t 3500 3500 16 3516 3517 enum_eq eqsel eqjoinsel ));
DESCR("equal");
diff --git a/src/include/catalog/pg_proc.h b/src/include/catalog/pg_proc.h
index e6713a61065..ac726462e46 100644
--- a/src/include/catalog/pg_proc.h
+++ b/src/include/catalog/pg_proc.h
@@ -4212,6 +4212,23 @@ DESCR("I/O");
DATA(insert OID = 2963 ( uuid_hash PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 23 "2950" _null_ _null_ _null_ _null_ uuid_hash _null_ _null_ _null_ ));
DESCR("hash");
+/* pg_lsn */
+DATA(insert OID = 3229 ( pg_lsn_in PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 3220 "2275" _null_ _null_ _null_ _null_ pg_lsn_in _null_ _null_ _null_ ));
+DESCR("I/O");
+DATA(insert OID = 3230 ( pg_lsn_out PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 2275 "3220" _null_ _null_ _null_ _null_ pg_lsn_out _null_ _null_ _null_ ));
+DESCR("I/O");
+DATA(insert OID = 3231 ( pg_lsn_lt PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_lt _null_ _null_ _null_ ));
+DATA(insert OID = 3232 ( pg_lsn_le PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_le _null_ _null_ _null_ ));
+DATA(insert OID = 3233 ( pg_lsn_eq PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_eq _null_ _null_ _null_ ));
+DATA(insert OID = 3234 ( pg_lsn_ge PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_ge _null_ _null_ _null_ ));
+DATA(insert OID = 3235 ( pg_lsn_gt PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_gt _null_ _null_ _null_ ));
+DATA(insert OID = 3236 ( pg_lsn_ne PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 16 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_ne _null_ _null_ _null_ ));
+DATA(insert OID = 3237 ( pg_lsn_mi PGNSP PGUID 12 1 0 0 0 f f f f t f i 2 0 1700 "3220 3220" _null_ _null_ _null_ _null_ pg_lsn_mi _null_ _null_ _null_ ));
+DATA(insert OID = 3238 ( pg_lsn_recv PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 3220 "2281" _null_ _null_ _null_ _null_ pg_lsn_recv _null_ _null_ _null_ ));
+DESCR("I/O");
+DATA(insert OID = 3239 ( pg_lsn_send PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 17 "3220" _null_ _null_ _null_ _null_ pg_lsn_send _null_ _null_ _null_ ));
+DESCR("I/O");
+
/* enum related procs */
DATA(insert OID = 3504 ( anyenum_in PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 3500 "2275" _null_ _null_ _null_ _null_ anyenum_in _null_ _null_ _null_ ));
DESCR("I/O");
diff --git a/src/include/catalog/pg_type.h b/src/include/catalog/pg_type.h
index 3fc20c6a8dd..db18a23bf6e 100644
--- a/src/include/catalog/pg_type.h
+++ b/src/include/catalog/pg_type.h
@@ -577,6 +577,11 @@ DESCR("UUID datatype");
#define UUIDOID 2950
DATA(insert OID = 2951 ( _uuid PGNSP PGUID -1 f b A f t \054 0 2950 0 array_in array_out array_recv array_send - - array_typanalyze i x f 0 -1 0 0 _null_ _null_ _null_ ));
+/* pg_lsn */
+DATA(insert OID = 3220 ( pg_lsn PGNSP PGUID 8 t b U t t \054 0 0 3221 pg_lsn_in pg_lsn_out pg_lsn_recv pg_lsn_send - - - d p f 0 -1 0 0 _null_ _null_ _null_ ));
+DESCR("PostgreSQL LSN datatype");
+DATA(insert OID = 3221 ( _pg_lsn PGNSP PGUID -1 f b A f t \054 0 3220 0 array_in array_out array_recv array_send - - array_typanalyze d x f 0 -1 0 0 _null_ _null_ _null_ ));
+
/* text search */
DATA(insert OID = 3614 ( tsvector PGNSP PGUID -1 f b U f t \054 0 0 3643 tsvectorin tsvectorout tsvectorrecv tsvectorsend - - ts_typanalyze i x f 0 -1 0 0 _null_ _null_ _null_ ));
DESCR("text representation for text search");
diff --git a/src/include/fmgr.h b/src/include/fmgr.h
index aed81cdc26b..700435b548d 100644
--- a/src/include/fmgr.h
+++ b/src/include/fmgr.h
@@ -230,6 +230,7 @@ extern struct varlena *pg_detoast_datum_packed(struct varlena * datum);
#define PG_GETARG_CHAR(n) DatumGetChar(PG_GETARG_DATUM(n))
#define PG_GETARG_BOOL(n) DatumGetBool(PG_GETARG_DATUM(n))
#define PG_GETARG_OID(n) DatumGetObjectId(PG_GETARG_DATUM(n))
+#define PG_GETARG_PG_LSN(n) DatumGetPgLsn(PG_GETARG_DATUM(n))
#define PG_GETARG_POINTER(n) DatumGetPointer(PG_GETARG_DATUM(n))
#define PG_GETARG_CSTRING(n) DatumGetCString(PG_GETARG_DATUM(n))
#define PG_GETARG_NAME(n) DatumGetName(PG_GETARG_DATUM(n))
@@ -302,6 +303,7 @@ extern struct varlena *pg_detoast_datum_packed(struct varlena * datum);
#define PG_RETURN_CHAR(x) return CharGetDatum(x)
#define PG_RETURN_BOOL(x) return BoolGetDatum(x)
#define PG_RETURN_OID(x) return ObjectIdGetDatum(x)
+#define PG_RETURN_PG_LSN(x) return PgLsnGetDatum(x)
#define PG_RETURN_POINTER(x) return PointerGetDatum(x)
#define PG_RETURN_CSTRING(x) return CStringGetDatum(x)
#define PG_RETURN_NAME(x) return NameGetDatum(x)
diff --git a/src/include/postgres.h b/src/include/postgres.h
index a8a206d988b..e72d5fca2b1 100644
--- a/src/include/postgres.h
+++ b/src/include/postgres.h
@@ -483,6 +483,20 @@ typedef Datum *DatumPtr;
#define ObjectIdGetDatum(X) ((Datum) SET_4_BYTES(X))
+/*
+ * DatumGetPgLsn
+ * Returns PostgreSQL log sequence number of a datum.
+ */
+
+#define DatumGetPgLsn(X) ((XLogRecPtr) GET_8_BYTES(X))
+
+/*
+ * PG_LSNGetDatum
+ * Returns datum representation for a PostgreSQL log sequence number.
+ */
+
+#define PgLsnGetDatum(X) ((Datum) SET_8_BYTES(X))
+
/*
* DatumGetTransactionId
* Returns transaction identifier value of a datum.
diff --git a/src/include/utils/pg_lsn.h b/src/include/utils/pg_lsn.h
new file mode 100644
index 00000000000..dc2193006e5
--- /dev/null
+++ b/src/include/utils/pg_lsn.h
@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_lsn.h
+ * Declarations for operations on log sequence numbers (LSNs) of
+ * PostgreSQL.
+ *
+ *
+ * Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/utils/pg_lsn.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_LSN_H
+#define PG_LSN_H
+
+#include "fmgr.h"
+
+extern Datum pg_lsn_in(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_out(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_recv(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_send(PG_FUNCTION_ARGS);
+
+extern Datum pg_lsn_eq(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_ne(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_lt(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_gt(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_le(PG_FUNCTION_ARGS);
+extern Datum pg_lsn_ge(PG_FUNCTION_ARGS);
+
+extern Datum pg_lsn_mi(PG_FUNCTION_ARGS);
+
+#endif /* PG_LSN_H */
diff --git a/src/test/regress/expected/pg_lsn.out b/src/test/regress/expected/pg_lsn.out
new file mode 100644
index 00000000000..50258f7ef19
--- /dev/null
+++ b/src/test/regress/expected/pg_lsn.out
@@ -0,0 +1,62 @@
+--
+-- PG_LSN
+--
+CREATE TABLE PG_LSN_TBL (f1 pg_lsn);
+-- Largest and smallest input
+INSERT INTO PG_LSN_TBL VALUES ('0/0');
+INSERT INTO PG_LSN_TBL VALUES ('FFFFFFFF/FFFFFFFF');
+-- Incorrect input
+INSERT INTO PG_LSN_TBL VALUES ('G/0');
+ERROR: invalid input syntax for transaction log location: "G/0"
+LINE 1: INSERT INTO PG_LSN_TBL VALUES ('G/0');
+ ^
+INSERT INTO PG_LSN_TBL VALUES ('-1/0');
+ERROR: invalid input syntax for transaction log location: "-1/0"
+LINE 1: INSERT INTO PG_LSN_TBL VALUES ('-1/0');
+ ^
+INSERT INTO PG_LSN_TBL VALUES (' 0/12345678');
+ERROR: invalid input syntax for transaction log location: " 0/12345678"
+LINE 1: INSERT INTO PG_LSN_TBL VALUES (' 0/12345678');
+ ^
+INSERT INTO PG_LSN_TBL VALUES ('ABCD/');
+ERROR: invalid input syntax for transaction log location: "ABCD/"
+LINE 1: INSERT INTO PG_LSN_TBL VALUES ('ABCD/');
+ ^
+INSERT INTO PG_LSN_TBL VALUES ('/ABCD');
+ERROR: invalid input syntax for transaction log location: "/ABCD"
+LINE 1: INSERT INTO PG_LSN_TBL VALUES ('/ABCD');
+ ^
+DROP TABLE PG_LSN_TBL;
+-- Operators
+SELECT '0/16AE7F8' = '0/16AE7F8'::pg_lsn;
+ ?column?
+----------
+ t
+(1 row)
+
+SELECT '0/16AE7F8'::pg_lsn != '0/16AE7F7';
+ ?column?
+----------
+ t
+(1 row)
+
+SELECT '0/16AE7F7' < '0/16AE7F8'::pg_lsn;
+ ?column?
+----------
+ t
+(1 row)
+
+SELECT '0/16AE7F8' > pg_lsn '0/16AE7F7';
+ ?column?
+----------
+ t
+(1 row)
+
+SELECT '0/16AE7F7'::pg_lsn - '0/16AE7F8'::pg_lsn; -- No negative results
+ERROR: transaction log location out of range
+SELECT '0/16AE7F8'::pg_lsn - '0/16AE7F7'::pg_lsn; -- correct
+ ?column?
+----------
+ 1
+(1 row)
+
diff --git a/src/test/regress/parallel_schedule b/src/test/regress/parallel_schedule
index 5758b07fa42..2e3eba83dee 100644
--- a/src/test/regress/parallel_schedule
+++ b/src/test/regress/parallel_schedule
@@ -13,7 +13,7 @@ test: tablespace
# ----------
# The first group of parallel tests
# ----------
-test: boolean char name varchar text int2 int4 int8 oid float4 float8 bit numeric txid uuid enum money rangetypes
+test: boolean char name varchar text int2 int4 int8 oid float4 float8 bit numeric txid uuid enum money rangetypes pg_lsn
# Depends on things setup during char, varchar and text
test: strings
diff --git a/src/test/regress/serial_schedule b/src/test/regress/serial_schedule
index 78348f5f865..4f1dedec2b5 100644
--- a/src/test/regress/serial_schedule
+++ b/src/test/regress/serial_schedule
@@ -19,6 +19,7 @@ test: uuid
test: enum
test: money
test: rangetypes
+test: pg_lsn
test: strings
test: numerology
test: point
diff --git a/src/test/regress/sql/pg_lsn.sql b/src/test/regress/sql/pg_lsn.sql
new file mode 100644
index 00000000000..dddafb32f71
--- /dev/null
+++ b/src/test/regress/sql/pg_lsn.sql
@@ -0,0 +1,25 @@
+--
+-- PG_LSN
+--
+
+CREATE TABLE PG_LSN_TBL (f1 pg_lsn);
+
+-- Largest and smallest input
+INSERT INTO PG_LSN_TBL VALUES ('0/0');
+INSERT INTO PG_LSN_TBL VALUES ('FFFFFFFF/FFFFFFFF');
+
+-- Incorrect input
+INSERT INTO PG_LSN_TBL VALUES ('G/0');
+INSERT INTO PG_LSN_TBL VALUES ('-1/0');
+INSERT INTO PG_LSN_TBL VALUES (' 0/12345678');
+INSERT INTO PG_LSN_TBL VALUES ('ABCD/');
+INSERT INTO PG_LSN_TBL VALUES ('/ABCD');
+DROP TABLE PG_LSN_TBL;
+
+-- Operators
+SELECT '0/16AE7F8' = '0/16AE7F8'::pg_lsn;
+SELECT '0/16AE7F8'::pg_lsn != '0/16AE7F7';
+SELECT '0/16AE7F7' < '0/16AE7F8'::pg_lsn;
+SELECT '0/16AE7F8' > pg_lsn '0/16AE7F7';
+SELECT '0/16AE7F7'::pg_lsn - '0/16AE7F8'::pg_lsn; -- No negative results
+SELECT '0/16AE7F8'::pg_lsn - '0/16AE7F7'::pg_lsn; -- correct
--
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