Re: Removing unneeded self joins

David Steele <david@pgmasters.net>

From: David Steele <david@pgmasters.net>

To: Andrey Lepikhov <a.lepikhov@postgrespro.ru>

Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>

Date: 2020-04-01T15:34:54Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Remove GUC_NOT_IN_SAMPLE from enable_self_join_elimination
- 717d0e8dd945 18.0 landed
Put enable_self_join_elimination into postgresql.conf.sample
- c2d329260cd8 18.0 landed
Get rid of ojrelid local variable in remove_rel_from_query()
- e167191dc146 18.0 landed
Implement Self-Join Elimination
- fc069a3a6319 18.0 cited
Revert: Remove useless self-joins
- d1d286d83c0e 17.0 landed
Replace lateral references to removed rels in subqueries
- 466979ef031a 17.0 landed
Replace relids in lateral subquery parse tree during SJE
- 489072ab7a9e 17.0 landed
Forbid SJE with result relation
- 8c441c082797 17.0 landed
Fix misuse of RelOptInfo.unique_for_rels cache by SJE
- 30b4955a4668 17.0 landed
Replace the relid in some missing fields during SJE
- a7928a57b9f0 17.0 landed
Revert 56-bit relfilenode change and follow-up commits.
- a448e49bcbe4 16.0 cited
Stabilize timetz test across DST transitions.
- 4a071afbd056 14.0 cited
Speed up finding EquivalenceClasses for a given set of rels
- 3373c7155350 13.0 cited
Fix mark-and-restore-skipping test case to not be a self-join.
- 24d08f3c0a1f 12.0 landed

On 1/27/20 11:10 PM, Andrey Lepikhov wrote:
> Rebased version v.22.
> - Added enable_self_join_removal GUC (true is default)
> - The joinquals of the relation that is being removed, redistributed in 
> accordance with the remove_rel_from_query () machinery.

This patch no longer applies cleanly on 
src/test/regress/sql/equivclass.sql: 
http://cfbot.cputube.org/patch_27_1712.log

The CF entry has been updated to Waiting on Author.

Regards,
-- 
-David
david@pgmasters.net