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planner: add index optimizer hint #11746

Merged
merged 12 commits into from Aug 23, 2019
Merged

planner: add index optimizer hint #11746

merged 12 commits into from Aug 23, 2019

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foreyes
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@foreyes foreyes commented Aug 15, 2019 •
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What problem does this PR solve?

Support SQL hint use index in comment-style optimizer hint.

What is changed and how it works?

Add new hint field into planbuilder, and add matched ast.IndexHint into ast.TableName when build data source.

mysql> explain select /*+ INDEX(t, c_d_e) */ a from t t1;
+-------------------+----------+------+----------------------------------------------------------------------------+
| id                | count    | task | operator info                                                              |
+-------------------+----------+------+----------------------------------------------------------------------------+
| IndexReader_5     | 10000.00 | root | index:IndexScan_4                                                          |
| └─IndexScan_4     | 10000.00 | cop  | table:t1, index:c, d, e, range:[NULL,+inf], keep order:false, stats:pseudo |
+-------------------+----------+------+----------------------------------------------------------------------------+
2 rows in set (0.00 sec)

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Tests

  • Unit test

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foreyes commented Aug 15, 2019

/run-all-tests

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codecov bot commented Aug 15, 2019 •
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Codecov Report

Merging #11746 into master will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master     #11746   +/-   ##
===========================================
  Coverage   81.9727%   81.9727%           
===========================================
  Files           435        435           
  Lines         96027      96027           
===========================================
  Hits          78716      78716           
  Misses        11847      11847           
  Partials       5464       5464

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codecov bot commented Aug 15, 2019

Codecov Report

Merging #11746 into master will decrease coverage by 0.0021%.
The diff coverage is 82.8571%.

@@               Coverage Diff                @@
##             master     #11746        +/-   ##
================================================
- Coverage   81.4277%   81.4256%   -0.0022%     
================================================
  Files           433        433                
  Lines         93193      93220        +27     
================================================
+ Hits          75885      75905        +20     
- Misses        11877      11880         +3     
- Partials       5431       5435         +4

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foreyes commented Aug 16, 2019

PTAL. @lamxTyler @lzmhhh123

@foreyes foreyes changed the title [WIP]planner: add index optimizer hint planner: add index optimizer hint Aug 16, 2019
lzmhhh123
lzmhhh123 reviewed Aug 16, 2019
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eurekaka
eurekaka reviewed Aug 16, 2019
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foreyes commented Aug 19, 2019

/run-all-tests

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foreyes commented Aug 19, 2019

/run-all-tests

@foreyes foreyes force-pushed the dev/add_index_hint branch 2 times, most recently from 930d783 to 1a85b8e Compare August 19, 2019 05:49
@foreyes foreyes mentioned this pull request Aug 19, 2019
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eurekaka
eurekaka reviewed Aug 20, 2019
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LGTM

@eurekaka eurekaka added the status/LGT1 Indicates that a PR has LGTM 1. label Aug 20, 2019
@foreyes foreyes requested a review from lzmhhh123 August 23, 2019 07:36
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foreyes commented Aug 23, 2019

/run-all-tests

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foreyes commented Aug 23, 2019

/run-unit-test

lzmhhh123
lzmhhh123 approved these changes Aug 23, 2019
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LGTM.

@lzmhhh123 lzmhhh123 added status/all tests passed status/can-merge Indicates a PR has been approved by a committer. status/LGT2 Indicates that a PR has LGTM 2. and removed status/LGT1 Indicates that a PR has LGTM 1. labels Aug 23, 2019
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sre-bot commented Aug 23, 2019

/run-all-tests

@sre-bot sre-bot merged commit cc04cd9 into pingcap:master Aug 23, 2019
@foreyes foreyes deleted the dev/add_index_hint branch August 25, 2019 07:59
foreyes added a commit to foreyes/tidb that referenced this pull request Sep 16, 2019
@foreyes
planner: add index optimizer hint (pingcap#11746)
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@foreyes foreyes mentioned this pull request Sep 16, 2019
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@zz-jason zz-jason mentioned this pull request Oct 10, 2019
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