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Jakob Huber
postgres-lambda-diff
Commits
b14a4651
Commit
b14a4651
authored
25 years ago
by
Thomas G. Lockhart
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Remove xref's to reference pages since they are not available in
the Programmer's Guide.
parent
389af07c
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doc/src/sgml/xfunc.sgml
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doc/src/sgml/xfunc.sgml
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b14a4651
...
@@ -363,8 +363,8 @@ WARN::function declared to return type EMP does not retrieve (EMP.*)
...
@@ -363,8 +363,8 @@ WARN::function declared to return type EMP does not retrieve (EMP.*)
the dynamic loader loads the function's object code into memory,
the dynamic loader loads the function's object code into memory,
and links the function with the running
and links the function with the running
<productname>Postgres</productname> executable. The SQL syntax
<productname>Postgres</productname> executable. The SQL syntax
for
the <xref linkend="sql-createfunction-title"
for
<command>CREATE FUNCTION</command>
endterm="sql-createfunction-title"> command
links the SQL function
links the SQL function
to the C source function in one of two ways. If the SQL function
to the C source function in one of two ways. If the SQL function
has the same name as the C source function the first form of the
has the same name as the C source function the first form of the
statement is used. The string argument in the AS clause is the
statement is used. The string argument in the AS clause is the
...
@@ -377,10 +377,14 @@ WARN::function declared to return type EMP does not retrieve (EMP.*)
...
@@ -377,10 +377,14 @@ WARN::function declared to return type EMP does not retrieve (EMP.*)
for. This link symbol is just the function name in the C source
for. This link symbol is just the function name in the C source
code.
code.
<note>
<para>
After it is used for the first time, a dynamically loaded, user
After it is used for the first time, a dynamically loaded, user
function is retained in memory, and future calls to the function
function is retained in memory, and future calls to the function
only incur the small overhead of a symbol table lookup.
only incur the small overhead of a symbol table lookup.
</para>
</para>
</note>
</para>
<para>
<para>
The string which specifies the object file (the string in the AS
The string which specifies the object file (the string in the AS
...
@@ -979,9 +983,8 @@ memmove(destination->data, buffer, 40);
...
@@ -979,9 +983,8 @@ memmove(destination->data, buffer, 40);
<para>
<para>
As of <productname>Postgres</productname> v6.6, the alternative
As of <productname>Postgres</productname> v6.6, the alternative
form of the AS clause for the SQL <command>CREATE
form of the AS clause for the SQL
FUNCTION</command> command described in <xref
<command>CREATE FUNCTION</command> command
linkend="sql-createfunction-title" endterm="sql-createfunction-title">
decouples the SQL function name from the function name in the C
decouples the SQL function name from the function name in the C
source code. This is now the preferred technique to accomplish
source code. This is now the preferred technique to accomplish
function overloading.
function overloading.
...
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