plperl: Package-qualify _TD

Failing to do so causes trigger invocation to fail when they are nested
within a function invocation that changes the current package.

Backpatch to 9.1; previous releases used a different method to obtain
_TD.  Per bug report from Mark Murawski (bug #6511)

Author: Alex Hunsaker

diff --git a/src/pl/plperl/plperl.c b/src/pl/plperl/plperl.c
index fb23ae2d935fb04bc16f78e7af999deaadffd799..7a92f3d8e28374c694ff51b27db0b0203a750e8d 100644 (file)
--- a/src/pl/plperl/plperl.c
+++ b/src/pl/plperl/plperl.c
@@ -2062,7 +2062,7 @@ plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo,
        ENTER;
        SAVETMPS;
 
-       TDsv = get_sv("_TD", 0);
+       TDsv = get_sv("main::_TD", 0);
        if (!TDsv)
                elog(ERROR, "couldn't fetch $_TD");