add distinct optimization (#3077) #3292
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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@zz-jason please accept the invitation then you can push to the cherry-pick pull requests. |
yikeke
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Jul 16, 2020
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/merge |
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/run-all-tests |
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cherry-pick #3077 to release-4.0
What is changed, added or deleted? (Required)
add distinct optimization, the English version of pingcap/docs-cn#3214
Which TiDB version(s) do your changes apply to? (Required)
What is the related PR or file link(s)?