executor: fix unexpected results when do index merge join on outer join (#20581) #20954
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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zz-jason
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Nov 12, 2020
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cherry-pick #20581 to release-4.0
What problem does this PR solve?
Issue Number: close #20571, close #20953
What is changed and how it works?
How it Works: filter outer rows in do merge join
Related changes
Check List
Tests
Side effects
Release note