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Make plperl's $_TD trigger data a global rather than a lexical variable,

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with a fresh local value for each invocation, to avoid unexpected sharing
violations. Per recent -hackers discussion.
This commit is contained in:
Andrew Dunstan 2006-05-29 13:51:23 +00:00
parent b32000eda4
commit 21e343da35
2 changed files with 6 additions and 5 deletions
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7
doc/src/sgml/plperl.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/plperl.sgml,v 2.53 2006/05/26 17:34:16 adunstan Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/plperl.sgml,v 2.54 2006/05/29 13:51:23 adunstan Exp $ -->
<chapter id="plperl">
<title>PL/Perl - Perl Procedural Language</title>
@ -660,8 +660,9 @@ $$ LANGUAGE plperl;
<para>
PL/Perl can be used to write trigger functions. In a trigger function,
the hash reference <varname>$_TD</varname> contains information about the
current trigger event. The fields of the <varname>$_TD</varname> hash
reference are:
current trigger event. <varname>$_TD</> is a global variable,
which gets a separate local value for each invocation of the trigger.
The fields of the <varname>$_TD</varname> hash reference are:
<variablelist>
<varlistentry>

4
src/pl/plperl/plperl.c
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@ -1,7 +1,7 @@
/**********************************************************************
* plperl.c - perl as a procedural language for PostgreSQL
*
* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.109 2006/05/26 17:34:16 adunstan Exp $
* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.110 2006/05/29 13:51:23 adunstan Exp $
*
**********************************************************************/
@ -771,7 +771,7 @@ plperl_create_sub(char *s, bool trusted)
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv("my $_TD=$_[0]; shift;", 0)));
XPUSHs(sv_2mortal(newSVpv("our $_TD; local $_TD=$_[0]; shift;", 0)));
XPUSHs(sv_2mortal(newSVpv(s, 0)));
PUTBACK;