| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> |
| Cc: | Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Peter Childs <Blue(dot)Dragon(at)blueyonder(dot)co(dot)uk>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: ADD FOREIGN KEY (was Re: [GENERAL] 7.4Beta) |
| Date: | 2003-09-29 20:43:28 |
| Message-ID: | 6950.1064868208@sss.pgh.pa.us |
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| Lists: | pgsql-general pgsql-hackers |
Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> writes:
> As an update, so far I still am getting better results with NOT EXISTS
> than the left join.
Hm. Don't suppose you were using EXPLAIN ANALYZE so we could see what's
happening? This is clearly a planner failure, although I'm unsure if we
can expect the planner to get the right answer with no pg_statistic entries.
regards, tom lane
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