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List:       postgresql-sql
Subject:    Re: [SQL] left join in cursor
From:       Tom Lane <tgl () sss ! pgh ! pa ! us>
Date:       2003-06-10 13:35:23
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Alexey Dashevsky <alex@kpgaz.chernigov.ua> writes:
> DECLARE "c" SCROLL CURSOR FOR select a.*,r.b1 as rb1 from a left join b using
> (cl) order by a.cl;
> FETCH FORWARD 100 in "c"; 
> FETCH FORWARD 100 in "c";
> MOVE -200 in "c";
> [ core dump ]

Some plan node types don't cope very well with being run backwards.

There is a workaround for this in CVS tip, but not in 7.2.* nor (IIRC)
in 7.3.*.

			regards, tom lane

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