Horton

Re: Parallel Full Hash Join

Melanie Plageman <melanieplageman@gmail.com>

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From: Melanie Plageman <melanieplageman@gmail.com>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2020-11-04T22:33:58Z
Lists: pgsql-hackers

Attachments

I've attached a patch with the corrections I mentioned upthread.
I've gone ahead and run pgindent, though, I can't say that I'm very
happy with the result.

I'm still not quite happy with the name
BarrierArriveAndDetachExceptLast(). It's so literal. As you said, there
probably isn't a nice name for this concept, since it is a function with
the purpose of terminating parallelism.

Regards,
Melanie (Microsoft)

Commits

  1. Remove overzealous assertion from PHJ.

  2. Remove comment obsoleted by 11c2d6fd.

  3. Parallel Hash Full Join.

  4. Improve the naming of Parallel Hash Join phases.

  5. Update the names of Parallel Hash Join phases.

  6. Add BarrierArriveAndDetachExceptLast().

  7. Mop-up for wait event naming issues.

  8. Push tuple limits through Gather and Gather Merge.