Tom Lane wrote:
> Log message:
>       Finish implementation of hashed aggregation.  Add enable_hashagg GUC
>       parameter to allow it to be forced off for comparison purposes.
>       Add ORDER BY clauses to a bunch of regression test queries that will
>       otherwise produce randomly-ordered output in the new regime.

Tom, do we really want to add a GUC that is used just for comparison of
performance?  I know we have the seqscan on/off, but there are valid
reasons to do that.  Do you think there will be cases where it will
faster to have this hash setting off?

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  Bruce Momjian                        |  http://candle.pha.pa.us
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