Horton

Re: [HACKERS] Runtime Partition Pruning

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: David Rowley <david.rowley@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Amit Langote <amitlangote09@gmail.com>, Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>, Jesper Pedersen <jesper.pedersen@redhat.com>, Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>, Beena Emerson <memissemerson@gmail.com>, amul sul <sulamul@gmail.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, Dilip Kumar <dilipbalaut@gmail.com>
Date: 2018-04-24T17:16:11Z
Lists: pgsql-hackers 
On 2018-04-19 12:04:35 +1200, David Rowley wrote:
> On 19 April 2018 at 03:13, Robert Haas <robertmhaas@gmail.com> wrote:
> > 10% is more than a "slight" improvement, I'd say!  It's certainly got
> > to be worth avoiding the repeated calls to ExecInitExpr, whatever we
> > do about the memory contexts.

Yea, that seems important. Good that that got in.

What I wonder, after skimming this change, is where the relevant
expression context is reset?  That's not really related to this change
but the wider thread, I just noticed it while looking at this.

Greetings,

Andres Freund

Commits

  1. Initialize ExprStates once in run-time partition pruning

  2. Add bms_prev_member function

  3. Support partition pruning at execution time

  4. Document partprune.c a little better

  5. Fix crash in pg_replication_slot_advance

  6. Add parallel-aware hash joins.

  7. Fix typo.

  8. Allow --with-bonjour to work with non-macOS implementations of Bonjour.

  9. Mention need for --no-inc-recursive in rsync command