planner, util: new unfixed mutrow for TypeNull #17893
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XuHuaiyu
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related PR: #15512 |
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cherry pick to release-2.1 in PR #17934 |
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cherry pick to release-3.0 in PR #17935 |
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cherry pick to release-3.1 in PR #17936 |
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cherry pick to release-4.0 in PR #17937 |
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Signed-off-by: sre-bot <sre-bot@pingcap.com> Co-authored-by: HuaiyuXu <391585975@qq.com> Co-authored-by: goroutine <ngaut@users.noreply.github.com> Co-authored-by: Lynn <zimu_xia@126.com> Co-authored-by: Zhang Jian <zjsariel@gmail.com>
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* cherry pick #17893 to release-3.0 Signed-off-by: sre-bot <sre-bot@pingcap.com> * resolve conflicts Co-authored-by: HuaiyuXu <391585975@qq.com> Co-authored-by: ti-srebot <66930949+ti-srebot@users.noreply.github.com> Co-authored-by: Yuanjia Zhang <zhangyuanjia@pingcap.com>
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What problem does this PR solve?
Issue Number: close #16027 #6252
Problem Summary:
TypeNull should be handled as unfixedLen field type. refer MySQL: https://github.com/mysql/mysql-server/blob/8.0/sql/field.h#L151
What is changed and how it works?
What's Changed:
makeMutRowBytesColumnfornilHow it Works:
The reason is mentioned in #15512 (comment).
Related changes
Check List
Tests
Side effects
N/A
Release note