executor: skip inner rows when the join keys contains NULL #7255
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zz-jason
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type/bugfix
|
/run-all-tests |
winoros
reviewed
Aug 2, 2018
…-merge-index-join
winoros
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Aug 3, 2018
|
/run-unit-test |
birdstorm
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status/LGT2
birdstorm
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Aug 5, 2018
zz-jason
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Aug 7, 2018
zz-jason
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What have you changed? (mandatory)
This PR skips the inner rows which contains
NULLvalue in the join key for "Merge Join" and "Index Join", thus they behaves the same as "Hash Join".What is the type of the changes? (mandatory)
How has this PR been tested? (mandatory)
existing tests.
Does this PR affect documentation (docs/docs-cn) update? (mandatory)
Does this PR affect tidb-ansible update? (mandatory)
Does this PR need to be added to the release notes? (mandatory)
Yes
Refer to a related PR or issue link (optional)
to #7226
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Add a few positive/negative examples (optional)