executor: fix auto retry when transaction has select for update (#11714)#11718
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/run-all-tests |
sre-bot
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LGTM |
tiancaiamao
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ngaut
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Aug 12, 2019
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cherry-pick #11714 to release-3.0
What problem does this PR solve?
When
@@tidb_disable_txn_auto_retryis set to0, transactions will retry automatically when there are write conflicts, but when there are select for update statements, auto-retry should be prevented. A previous PR #10972 makespoint getplan supportsselect for update, but didn't setTransactionContext.ForUpdateto true, so the transaction will retry even it hasselect for updatestatements.What is changed and how it works?
extract a function
doLockKeysthat used by bothSelectLockexecutor andPointGetexecutor. In this function, setTransactionContext.ForUpdateto true.Check List
Tests
Code changes
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