Horton

Re: WIP: [[Parallel] Shared] Hash

Thomas Munro <thomas.munro@enterprisedb.com>

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From: Thomas Munro <thomas.munro@enterprisedb.com>
To: Oleg Golovanov <rentech@mail.ru>
Cc: Peter Geoghegan <pg@bowt.ie>, Rafia Sabih <rafia.sabih@enterprisedb.com>, Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>, Haribabu Kommi <kommi.haribabu@gmail.com>, Pg Hackers <pgsql-hackers@postgresql.org>, Robert Haas <robertmhaas@gmail.com>, Andres Freund <andres@anarazel.de>
Date: 2017-06-28T00:58:37Z
Lists: pgsql-hackers

Attachments

On Mon, May 22, 2017 at 6:39 AM, Thomas Munro
<thomas.munro@enterprisedb.com> wrote:
> On Thu, Apr 27, 2017 at 11:03 AM, Thomas Munro
> <thomas.munro@enterprisedb.com> wrote:
>> On Thu, Apr 27, 2017 at 5:13 AM, Oleg Golovanov <rentech@mail.ru> wrote:
>>> Can you actualize your patch set? The error got from
>>> 0010-hj-parallel-v12.patch.
>>
>> I really should get around to setting up a cron job to tell me about
>> that.  Here's a rebased version.
>
> Rebased.

Rebased for the recent re-indent and shm_toc API change; no functional
changes in this version.

(I have a new patch set in the pipeline adding the skew optimisation
and some other things, more on that soon.)

-- 
Thomas Munro
http://www.enterprisedb.com

Commits

  1. Add shared tuplestores.

  2. Remove BufFile's isTemp flag.

  3. Provide DSM segment to ExecXXXInitializeWorker functions.

  4. Optimize joins when the inner relation can be proven unique.

  5. Fix failure to use clamp_row_est() for parallel joins.

  6. Document lack of validation when attaching foreign partitions.

  7. Fix inclusions of c.h from .h files.

  8. Fix inclusions of postgres_fe.h from .h files.

  9. Bring plpgsql into line with header inclusion policy.

  10. Document intentional violations of header inclusion policy.

  11. Shut down Gather's children before shutting down Gather itself.

  12. btree: Support parallel index scans.

  13. Add explicit ORDER BY to a few tests that exercise hash-join code.

  14. Revise hash join code so that we can increase the number of batches

  15. Rewrite hash join to use simple linked lists instead of a