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: Amit Langote <amitlangote09@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, 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: 2018-04-07T05:01:04Z
Lists: pgsql-hackers 
On 2018-04-07 16:58:01 +1200, David Rowley wrote:
> On 7 April 2018 at 16:31, Andres Freund <andres@anarazel.de> wrote:
> > I've not followed this thread/feature at all, but I don't find the
> > comments atop partprune.c even remotely sufficient. Unless there's an
> > README hidden or such hidden somewhere?
> 
> There's not a README file. The comments for partprune.c, do you want
> this to explain more about how partition pruning works or how this
> patch uses the existing code?

Primarily the first. This isn't trivial straightforward code.


> Probably if we need to explain more there about how pruning works then
> it should be a fixup patch to 9fdb675fc, no?

Yea, it's about that. Sorry for accidentally jumping on the wrong
thread.

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