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Minor fixes.

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This commit is contained in:
Tom Lane 2001-01-22 16:11:17 +00:00
parent 505cdd5873
commit 7e0919136a
1 changed files with 8 additions and 5 deletions
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13
doc/src/sgml/xfunc.sgml
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@ -1,5 +1,5 @@
<!-- <!--
$Header: /cvsroot/pgsql/doc/src/sgml/xfunc.sgml,v 1.29 2001/01/20 20:59:29 petere Exp $ $Header: /cvsroot/pgsql/doc/src/sgml/xfunc.sgml,v 1.30 2001/01/22 16:11:17 tgl Exp $
--> -->
<chapter id="xfunc"> <chapter id="xfunc">
@ -874,12 +874,12 @@ PG_FUNCTION_INFO_V1(funcname);
<function>PG_GETARG_<replaceable>xxx</replaceable>()</function> <function>PG_GETARG_<replaceable>xxx</replaceable>()</function>
macro that corresponds to the argument's datatype, and the result macro that corresponds to the argument's datatype, and the result
is returned using a is returned using a
<function>PG_GETARG_<replaceable>xxx</replaceable>()</function> <function>PG_RETURN_<replaceable>xxx</replaceable>()</function>
macro for the return type. macro for the return type.
</para> </para>
<para> <para>
Here we show the same functions as above, coded in new style: Here we show the same functions as above, coded in version-1 style:
<programlisting> <programlisting>
#include &lt;string.h&gt; #include &lt;string.h&gt;
@ -916,6 +916,7 @@ PG_FUNCTION_INFO_V1(makepoint);
Datum Datum
makepoint(PG_FUNCTION_ARGS) makepoint(PG_FUNCTION_ARGS)
{ {
/* Here, the pass-by-reference nature of Point is not hidden */
Point *pointx = PG_GETARG_POINT_P(0); Point *pointx = PG_GETARG_POINT_P(0);
Point *pointy = PG_GETARG_POINT_P(1); Point *pointy = PG_GETARG_POINT_P(1);
Point *new_point = (Point *) palloc(sizeof(Point)); Point *new_point = (Point *) palloc(sizeof(Point));
@ -969,7 +970,7 @@ concat_text(PG_FUNCTION_ARGS)
<para> <para>
The <command>CREATE FUNCTION</command> commands are the same as The <command>CREATE FUNCTION</command> commands are the same as
for the old-style equivalents. for the version-0 equivalents.
</para> </para>
<para> <para>
@ -994,7 +995,9 @@ concat_text(PG_FUNCTION_ARGS)
test for NULL inputs to a non-strict function, return a NULL test for NULL inputs to a non-strict function, return a NULL
result (from either strict or non-strict functions), return result (from either strict or non-strict functions), return
<quote>set</quote> results, and implement trigger functions and <quote>set</quote> results, and implement trigger functions and
procedural-language call handlers. For more details see procedural-language call handlers. Version-1 code is also more
portable than version-0, because it does not break ANSI C restrictions
on function call protocol. For more details see
<filename>src/backend/utils/fmgr/README</filename> in the source <filename>src/backend/utils/fmgr/README</filename> in the source
distribution. distribution.
</para> </para>