ddl: fix parallel execution of "drop DB" and other DDL issue (#17566) #17659
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Signed-off-by: sre-bot <sre-bot@pingcap.com>
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AilinKid
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Jun 4, 2020
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cherry-pick #17566 to release-4.0
What problem does this PR solve?
Issue Number: close #17565
Problem Summary:
Parallel execution of "drop database" and other DDL (such as "alter database") may cause panic.
Because we don't check the return value in
GetDatabasein the background.What is changed and how it works?
What's Changed:
How it Works:
After executing
GetDatabase, we need to check whether the return value is nil.Related changes
Check List
Tests
Side effects
Release note