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executor: Fix index join hash produces redundant rows for left outer anti semi join type (#52908) #52923
executor: Fix index join hash produces redundant rows for left outer anti semi join type (#52908) #52923
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Signed-off-by: yibin <huyibin@pingcap.com>
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## release-8.1 #52923 +/- ##
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Coverage ? 71.1944%
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Files ? 1462
Lines ? 420401
Branches ? 0
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Hits ? 299302
Misses ? 100681
Partials ? 20418
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LGTM
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LGTM
[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: windtalker, xzhangxian1008 The full list of commands accepted by this bot can be found here. The pull request process is described here
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[LGTM Timeline notifier]Timeline:
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This is an automated cherry-pick of #52908
What problem does this PR solve?
Issue Number: close #52902
Problem Summary:
In IndexHashJoin inner work, we use join type to check if redundant matched rows should be appended to JoinResult. However, only semi and leftOuterSemi is recongnized:
tidb/pkg/executor/index_lookup_hash_join.go
Lines 739 to 752 in 8ba1fa4
While anti-semi join doesn't care matched rows, left outer anti semi will append joined rows, thus caused the problem.
What changed and how does it work?
Check List
Tests
Side effects
Documentation
Release note
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