Bruno Wolff III <[EMAIL PROTECTED]> writes:
> On Wed, Aug 20, 2003 at 13:44:59 -0500,
> Ron Johnson <[EMAIL PROTECTED]> wrote:
>> The GROUP BY does implicit sorting, so an ORDER BY on the exact same
>> column(s) as the GROUP BY is redundant.
> That is an implementation detail, not a promise. With hashed aggregates
> in 7.4, you might find this isn't true.
s/might/will/
regards, tom lane
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
