On Mon, Apr 22, 2013 at 6:41 PM, Andres Freund <and...@2ndquadrant.com>wrote:

> On 2013-04-22 18:35:04 +0530, Jeevan Chalke wrote:
> > Hi,
> >
> > I have observed that following sequence is causing server crash.
> >
> > CREATE MATERIALIZED VIEW temp_class_mv AS
> >   SELECT * FROM pg_class
> >   WITH NO DATA;
> >
> > CREATE OR REPLACE FUNCTION test_refresh_mv()
> > RETURNS int
> > AS $$
> > BEGIN
> >  REFRESH MATERIALIZED VIEW temp_class_mv;
> >  return 1;
> > END; $$ LANGUAGE plpgsql;
> >
> > SELECT test_refresh_mv();
> >
> >
> > I had a quick look over the crash and it is hitting following Assert in
> > spi.c:
> >
> >                 else if (IsA(stmt, RefreshMatViewStmt))
> >                 {
> >                     Assert(strncmp(completionTag,
> >                                    "REFRESH MATERIALIZED VIEW ", 23) ==
> 0);
> >                     _SPI_current->processed = strtoul(completionTag + 23,
> >                                                       NULL, 10);
> >                 }
> >
> > It seems like we are missing expected value for completionTag in
> > ExecRefreshMatView()
>
> Possibly independent from this issue, but where did that 23 come from?
>

23 is also bogus here.
It should be 26 i.e. length of "REFRESH MATERIALIZED VIEW "

BTW, attached is the patch which works well for me, but need details review.

Thanks


> ISTM we're strtoul()ing "EW somenumber" here.
>
> Greetings,
>
> Andres Freund
>
> --
>  Andres Freund                     http://www.2ndQuadrant.com/
>  PostgreSQL Development, 24x7 Support, Training & Services
>



-- 
Jeevan B Chalke
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Attachment: mv_crash.patch
Description: Binary data

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