Am Thursday, 14. August 2008 schrieb Dmitry Teslenko:
> SELECT SUM(...) FROM table1 WHERE field3 = 'ABC' AND field1 <> 1
> GROUP BY field2
>
> And planner picks up a sequential scan of a table. Why does he?
Presumably because it thinks it is the best plan, and I see no reason to doubt
that outright. You might get better performance with an index on field3.