Horton

Re: [HACKERS] Runtime Partition Pruning

Alvaro Herrera <alvherre@alvh.no-ip.org>

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From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: David Rowley <david.rowley@2ndquadrant.com>
Cc: Amit Langote <amitlangote09@gmail.com>, Andres Freund <andres@anarazel.de>, 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>, Robert Haas <robertmhaas@gmail.com>, amul sul <sulamul@gmail.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, Dilip Kumar <dilipbalaut@gmail.com>
Date: 2018-04-07T13:41:12Z
Lists: pgsql-hackers 
David Rowley wrote:
> On 8 April 2018 at 01:18, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> > Amit had it as "indexes" also in his original.  I wanted to avoid using
> > the "indexes" word alone, whose meaning is so overloaded.
> 
> hmm, good point.
> 
> > How about this?
> > "... which are then executed to produce a set of partitions (as indexes
> > of resultRelInfo->part_rels array) that satisfy the constraints in the
> > step".
> 
> Works for me, but with RelOptInfo rather than resultRelInfo.

Oops, sorry about that.  Pushed now, adding one line to
get_matching_partitions also.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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