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planner: remove useless predicates after partition pruning #24282

Merged
merged 25 commits into from
May 2, 2021
Merged

planner: remove useless predicates after partition pruning #24282

merged 25 commits into from
May 2, 2021

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zhuo-zhi
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What problem does this PR solve?

Issue Number: close #22079

Problem Summary:

remove useless predicates after partition pruning

What is changed and how it works?

What's Changed:

Add pruning rules to remove useless predicates after partition pruning.

How it Works:

If predicates lie on the boundary of some partitions, we can add some rules to remove these predicates after partition pruning.

Related changes

  • Need to cherry-pick to the release branch

Check List

Tests

  • Unit test

Side effects

  • N/A

Release note

  • remove useless predicates after partition pruning

@zhuo-zhi zhuo-zhi requested a review from a team as a code owner April 26, 2021 05:45
@zhuo-zhi zhuo-zhi requested review from qw4990 and removed request for a team April 26, 2021 05:45
@ti-chi-bot ti-chi-bot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Apr 26, 2021
@zhuo-zhi zhuo-zhi marked this pull request as draft April 26, 2021 05:45
@ti-chi-bot ti-chi-bot added the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Apr 26, 2021
@qw4990 qw4990 added the sig/planner SIG: Planner label Apr 26, 2021
@qw4990 qw4990 requested a review from rebelice April 26, 2021 05:57
@ti-chi-bot ti-chi-bot added size/S Denotes a PR that changes 10-29 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Apr 26, 2021
@qw4990
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qw4990 commented Apr 27, 2021

@zhuo-zhi Ping, is this PR ready for review?

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zhuo-zhi commented Apr 27, 2021 •
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@zhuo-zhi Ping, is this PR ready for review?

Still some unit test cases to add. Maybe later on today.

@ti-chi-bot ti-chi-bot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Apr 27, 2021
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zhuo-zhi commented Apr 27, 2021 •
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There might be other non-equal predicates lying on the boundary of range partitions that can be pruned out as well. eg:

CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY RANGE ( `a` ) (
  PARTITION `p0` VALUES LESS THAN (10),
  PARTITION `p1` VALUES LESS THAN (22),
  PARTITION `p2` VALUES LESS THAN (31),
  PARTITION `p_max` VALUES LESS THAN (MAXVALUE)
);

desc select * from t where a >= 22 and a < 31

We can leave this for future development.

@zhuo-zhi zhuo-zhi marked this pull request as ready for review April 27, 2021 11:36
@ti-chi-bot ti-chi-bot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Apr 27, 2021
winoros
winoros reviewed Apr 28, 2021
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others lgtm

planner/core/rule_partition_processor.go Outdated Show resolved Hide resolved
zhuo-zhi
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Done with more unit tests

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qw4990 commented Apr 29, 2021

/merge

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@zhuo-zhi: Your PR was out of date, I have automatically updated it for you.

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sre-bot commented May 2, 2021

Please follow PR Title Format:

  • pkg [, pkg2, pkg3]: what's changed

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  • *: what's changed

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sre-bot commented May 2, 2021

Please follow PR Title Format:

  • pkg [, pkg2, pkg3]: what's changed

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@ti-chi-bot ti-chi-bot merged commit 207ce34 into pingcap:master May 2, 2021
@qw4990 qw4990 mentioned this pull request Jun 8, 2021
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mjonss added a commit to mjonss/tidb that referenced this pull request Jun 10, 2022
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Manual revert of pingcap#24282 / 207ce34
08fa343
@mjonss mjonss mentioned this pull request Jun 10, 2022
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ti-chi-bot pushed a commit that referenced this pull request Jun 14, 2022
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planner: Manual revert of #24282 (#35298)
2ba2a9e 
ref #22079, closes #33966, close #35181
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ti-chi-bot pushed a commit that referenced this pull request Aug 22, 2022
@ti-srebot
planner: Manual revert of #24282 (#35298) (#37268)
7ddd028 
ref #22079, closes #33966, close #35181
@ti-srebot ti-srebot mentioned this pull request Sep 22, 2022
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ti-chi-bot pushed a commit that referenced this pull request Sep 22, 2022
@ti-srebot
planner: Manual revert of #24282 (#35298) (#38076)
6f15862 
ref #22079, closes #33966, close #35181
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@qw4990 qw4990 qw4990 approved these changes

@winoros winoros winoros approved these changes

@rebelice rebelice Awaiting requested review from rebelice

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remove invalid predicates after partition pruning
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