Re: [PORTS] Port Bug Report: calling notify in pl/pgsql proc causes core dump - Mailing list pgsql-ports

Can someone comment on this?


>
> >
> > Jan, this is yours.
> >
>
> Actually, I made a 'workaround' fix to this problem (after posting this
> bug report). I'll append the patch.  I don't pretend to understand the
> internals of this system, but my guess is that a simple statement like
> 'notify xyz' went through the planner, got an spi_plan, but the 'plan
> list' was empty.  So here's my patch, which may be fixing a symptom, not
> the cause, YMMV:
>
> --- pl_exec.c~  Wed May 26 03:07:39 1999
> +++ pl_exec.c   Fri Jun 25 11:00:53 1999
> @@ -2482,6 +2482,10 @@
>
>         plan = (Plan *) lfirst(spi_plan->ptlist);
>
> +       /* it would seem as though plan can be null... --DAVID */
> +       if (plan == NULL)
> +               return;
> +
>         /* ----------
>          * 2. It must be a RESULT plan --> no scan's required
>          * ----------
>
>
> >
> > >
> > > ============================================================================
> > >                         POSTGRESQL BUG REPORT TEMPLATE
> > > ============================================================================
> > >
> > >
> > > Your name               : David Mansfield
> > > Your email address      : david@cobite.com
> > >
> > > Category                : runtime: back-end
> > > Severity                : serious
> > >
> > > Summary: calling notify in pl/pgsql proc causes core dump
> > >
> > > System Configuration
> > > --------------------
> > >   Operating System   : Linux 2.2.9
> > >
> > >   PostgreSQL version : 6.5
> > >
> > >   Compiler used      : gcc 2.7.2.3
> > >
> > > Hardware:
> > > ---------
> > > RedHat 5.2
> > >
> > > Versions of other tools:
> > > ------------------------
> > > RedHat 5.2 standard
> > >
> > > --------------------------------------------------------------------------
> > >
> > > Problem Description:
> > > --------------------
> > > calling notify in pl/pgsql proc causes core dump
> > >
> > > --------------------------------------------------------------------------
> > >
> > > Test Case:
> > > ----------
> > > createdb bugs
> > > psql bugs
> > > \i /usr/src/postgresql-6.5/src/pl/plpgsql/src/mklang.sql
> > > create  function a_func()
> > >         returns
> > >                 char
> > >         as
> > >                 'begin
> > >                        notify my_listen;
> > >                        return \'a\';
> > >                  end;'
> > >         language
> > >                 'plpgsql'
> > > ;
> > > select a_func();
> > >
> > >
> > > --------------------------------------------------------------------------
> > >
> > > Solution:
> > > ---------
> > >
> > >
> > > --------------------------------------------------------------------------
> > >
> > >
> > >
> >
> >
> >
>
> --
> /==============================\
> | David Mansfield              |
> | david@cobite.com             |
> \==============================/
>
>


--
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