Re: postmaster core ( finally I have it )

From: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
> "Mendola Gaetano" <mendola(at)bigfoot(dot)com> writes:
> > The process killed made always the same select ( with different
> > id_package ):
>
> > SELECT id_publisher, publisher_name, id_package, package_name
> > FROM v_psl_package_info
> > WHERE id_package = 177;
>
> > (gdb) where
> > #0 0x08171fdd in RelationBuildRuleLock ()
> > #1 0x081722ab in RelationBuildDesc ()
> > #2 0x0817311c in RelationIdGetRelation ()
> > #3 0x08077b95 in relation_open ()
> > #4 0x08077d24 in heap_openrv ()
> > #5 0x080b1015 in addRangeTableEntry ()
> > #6 0x080ab6de in transformTableEntry ()
> > #7 0x080ab942 in transformFromClauseItem ()
> > #8 0x080ab321 in transformFromClause ()
> > #9 0x0809f639 in transformSelectStmt ()
> > #10 0x0809dcc4 in transformStmt ()
> > #11 0x0809da06 in parse_analyze ()
>
> Hmm. RelationBuildRuleLock is concerned with reading the rule
> information for a table; specifically, it's evidently trying to
> read the rules for v_psl_package_info. I suspect some form of
> data corruption in the pg_rewrite row(s) for this table. Do you
> see any misbehavior when you do
>
> select * from pg_rewrite where ev_class = 'v_psl_package_info'::regclass

All seems good.

> In particular, are any of the columns NULL in these rows?

I did:
select *
from pg_rewrite
where ev_class = 'v_psl_package_info'::regclass and
( rulename is null or
ev_class is null or
ev_attr is null or
ev_type is null or
is_instead is null or
ev_qual is null or
ev_action is null );

and I had: No rows.

v_psl_package_info is a view, shall we look in another direction ?

thank you
Gaetano