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Support RETURN QUERY EXECUTE in plpgsql.

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Pavel Stehule
This commit is contained in:
Tom Lane
2008-05-03 00:11:36 +00:00
parent 511b798c46
commit 47391591ba
7 changed files with 185 additions and 62 deletions
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12
doc/src/sgml/plpgsql.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/plpgsql.sgml,v 1.127 2008/04/06 23:43:29 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/plpgsql.sgml,v 1.128 2008/05/03 00:11:36 tgl Exp $ -->
<chapter id="plpgsql">
<title><application>PL/pgSQL</application> - <acronym>SQL</acronym> Procedural Language</title>
@ -1467,6 +1467,7 @@ RETURN <replaceable>expression</replaceable>;
<synopsis>
RETURN NEXT <replaceable>expression</replaceable>;
RETURN QUERY <replaceable>query</replaceable>;
RETURN QUERY EXECUTE <replaceable class="command">command-string</replaceable> <optional> USING <replaceable>expression</replaceable> <optional>, ...</optional> </optional>;
</synopsis>
<para>
@ -1500,6 +1501,14 @@ RETURN QUERY <replaceable>query</replaceable>;
let control reach the end of the function).
</para>
<para>
<command>RETURN QUERY</command> has a variant
<command>RETURN QUERY EXECUTE</command>, which specifies the
query to be executed dynamically. Parameter expressions can
be inserted into the computed query string via <literal>USING</>,
in just the same way as in the <command>EXECUTE</> command.
</para>
<para>
If you declared the function with output parameters, write just
<command>RETURN NEXT</command> with no expression. On each
@ -1544,7 +1553,6 @@ SELECT * FROM getallfoo();
Note that functions using <command>RETURN NEXT</command> or
<command>RETURN QUERY</command> must be called as a table source in
a <literal>FROM</literal> clause.
</para>
<note>