Horton

Re: [HACKERS] Runtime Partition Pruning

Amit Langote <amitlangote09@gmail.com>

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From: Amit Langote <amitlangote09@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: David Rowley <david.rowley@2ndquadrant.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: 2018-04-07T05:49:16Z
Lists: pgsql-hackers

Attachments

On Sat, Apr 7, 2018 at 1:58 PM, Amit Langote <amitlangote09@gmail.com> wrote:
> On Sat, Apr 7, 2018 at 1:31 PM, 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?
>
> Sorry there isn't a README and I agree partprune.c's header comment
> could be improved quite a bit.
>
> Just to be clear, that's the fault of the patch that was already
> committed earlier today (9fdb675fc "Faster partition pruning"), not
> this patch, which just extends partition.c's functionality to
> implement additional planner and executor support for runtime pruning.
>
> I'm drafting a patch that expands the partprune.c comment and will post shortly.

See if the attached makes it any better.

Now I know we don't have the runtime pruning in yet, but since the
proposed patch would extend its functionality I have included its
description in the comment.

Thanks,
Amit

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