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体验新版 GitCode,发现更多精彩内容 >>
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7e091913
编写于
1月 22, 2001
作者:
T
Tom Lane
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电子邮件补丁
差异文件
Minor fixes.
上级
505cdd58
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
8 addition
and
5 deletion
+8
-5
doc/src/sgml/xfunc.sgml
doc/src/sgml/xfunc.sgml
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未找到文件。
doc/src/sgml/xfunc.sgml
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7e091913
<!--
$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">
...
...
@@ -874,12 +874,12 @@ PG_FUNCTION_INFO_V1(funcname);
<function>PG_GETARG_<replaceable>xxx</replaceable>()</function>
macro that corresponds to the argument's datatype, and the result
is returned using a
<function>PG_
GETARG
_<replaceable>xxx</replaceable>()</function>
<function>PG_
RETURN
_<replaceable>xxx</replaceable>()</function>
macro for the return type.
</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>
#include <string.h>
...
...
@@ -916,6 +916,7 @@ PG_FUNCTION_INFO_V1(makepoint);
Datum
makepoint(PG_FUNCTION_ARGS)
{
/* Here, the pass-by-reference nature of Point is not hidden */
Point *pointx = PG_GETARG_POINT_P(0);
Point *pointy = PG_GETARG_POINT_P(1);
Point *new_point = (Point *) palloc(sizeof(Point));
...
...
@@ -969,7 +970,7 @@ concat_text(PG_FUNCTION_ARGS)
<para>
The <command>CREATE FUNCTION</command> commands are the same as
for the
old-style
equivalents.
for the
version-0
equivalents.
</para>
<para>
...
...
@@ -994,7 +995,9 @@ concat_text(PG_FUNCTION_ARGS)
test for NULL inputs to a non-strict function, return a NULL
result (from either strict or non-strict functions), return
<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
distribution.
</para>
...
...
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