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The enclose patch clarifies and makes a more useful example for the

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Global Values in PL/Perl section of the documents.

David Fetter
This commit is contained in:
Bruce Momjian 2004-08-18 03:37:56 +00:00
parent 3d20578e93
commit 1f0a19c263
1 changed files with 12 additions and 10 deletions
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22
doc/src/sgml/plperl.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/plperl.sgml,v 2.26 2004/07/21 20:44:52 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/plperl.sgml,v 2.27 2004/08/18 03:37:56 momjian Exp $
-->
<chapter id="plperl">
@ -317,23 +317,25 @@ $$ LANGUAGE plperl;
<sect1 id="plperl-global">
<title>Global Values in PL/Perl</title>
<para>
You can use the %_SHARED to store data between function calls. WHY
IS THIS A HASH, AND NOT A HASH REF?
You can use the %_SHARED to store data between function calls.
</para>
<para>
For example:
<programlisting>
CREATE OR REPLACE FUNCTION set_var(TEXT) RETURNS TEXT AS $$
$_SHARED{first} = 'Hello, PL/Perl!';
return 'ok';
CREATE OR REPLACE FUNCTION set_var(name TEXT, val TEXT) RETURNS TEXT AS $$
if ($_SHARED{$_[0]} = $_[1]) {
return 'ok';
} else {
return "Can't set shared variable $_[0] to $_[1]";
}
$$ LANGUAGE plperl;
CREATE OR REPLACE FUNCTION get_var() RETURNS text AS $$
return $_SHARED{first};
CREATE OR REPLACE FUNCTION get_var(name TEXT) RETURNS text AS $$
return $_SHARED{$_[0]};
$$ LANGUAGE plperl;
SELECT set_var('hello plperl');
SELECT get_var();
SELECT set_var('sample', $q$Hello, PL/Perl! How's tricks?$q$);
SELECT get_var('sample');
</programlisting>
</para>