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Re: Improve hash join's handling of tuples with null join keys - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Improve hash join's handling of tuples with null join keys
Date
Msg-id 470075.1756063113@sss.pgh.pa.us
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In response to Re: Improve hash join's handling of tuples with null join keys  (Marc-Olaf Jaschke <moj@dshare.de>)
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Marc-Olaf Jaschke <moj@dshare.de> writes:
> I can confirm that the patch fixes the issue (Bug #19030). The memory usage remains within the expected range of
work_mem.
> This also applies to parallel hash joins.
> The query also runs significantly faster.
> I also tested cases with multiple left joins.
> I have only observed this problem when there are many null values in the join column.

Thanks for testing!

            regards, tom lane

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