Grzegorz Jaskiewicz <g...@pointblue.com.pl> writes:
> all I know, is that the same query will work on 8.3 in reasonably acceptable
> time frame.
>
Because I see the exact same plan -- in fact with the exact same cost:
Welcome to psql 8.3.3, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
\h for help with SQL commands
\? for help with psql commands
\g or terminate with semicolon to execute query
\q to quit
postgres=# explain select a.a from a where a not in (select a from b);
QUERY PLAN
-------------------------------------------------------------------------
Seq Scan on a (cost=99035.00..257874197565.00 rows=3000000 width=4)
Filter: (NOT (subplan))
SubPlan
-> Materialize (cost=99035.00..171493.00 rows=5400000 width=4)
-> Seq Scan on b (cost=0.00..75177.00 rows=5400000 width=4)
(5 rows)
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's PostGIS support!
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