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Re: Performance regression with PostgreSQL 11 and partitioning

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: David Rowley <david.rowley@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>, Amit Langote <amitlangote09@gmail.com>, Thomas Reiss <thomas.reiss@dalibo.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2018-06-25T22:48:23Z
Lists: pgsql-hackers 
On 2018-Jun-18, David Rowley wrote:

> I've attached a patch which cleans up my earlier version and moves the
> setup of the append_rel_array into its own function instead of
> sneaking code into setup_simple_rel_arrays(). I've also now updated
> the comment above find_childrel_appendrelinfo(), which is now an
> unused function.

I checked that this patch fixes the originally reported performance
regression.

Unless there are objections, I intend to push this patch tomorrow.

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

Commits

  1. Fix typo in comment

  2. Allow direct lookups of AppendRelInfo by child relid

  3. Teach adjust_appendrel_attrs(_multilevel) to do multiple translations.