Re: [GENERAL] backend crashing with INTERSECT / ORDER BY

> >
> > So I tried INTERSECT with ORDER BY and it crashes on 6.5 and 6.5.1:
> >
> > [csmaster@kamet release0]$ psql cs1
> > Welcome to the POSTGRESQL interactive sql monitor:
> >   Please read the file COPYRIGHT for copyright terms of POSTGRESQL
> > [PostgreSQL 6.5.1 on i686-pc-linux-gnu, compiled by gcc egcs-2.91.66]
> >
> >    type \? for help on slash commands
> >    type \q to quit
> >    type \g or terminate with semicolon to execute query
> >  You are currently connected to the database: cs1
> >
> > cs1=> SELECT envelope FROM docobj
> > cs1-> WHERE attrid=5
> > cs1-> INTERSECT
> > cs1-> SELECT envelope FROM docobj
> > cs1-> WHERE attrid=6
> > cs1-> ORDER BY attrid DESC
> > cs1-> ;
> > pqReadData() -- backend closed the channel unexpectedly.
> >         This probably means the backend terminated abnormally
> >         before or while processing the request.
> > We have lost the connection to the backend, so further processing is impossible.  Terminating.
> >
>
> Not sure.  I just tried this:
>
> test=> select relname from pg_class intersect select relname from
>     pg_class order by relname;
> ERROR:  get_sortgroupclause_expr: ORDER/GROUP BY expression not found in
>     targetlist
>
> Not sure what this means either.
>

  On 6.5.2 ....

  test=> select relname from pg_class intersect select relname from
        pg_class order by relname;


  works fine...

  --Greg--