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mysql online ddl still lock
Posted by: hua kai
Date: February 19, 2016 02:35AM

Hi,
My mysql is 5.6.22. It should support online DDL.

But I found some strange problem.
For some table, it supports online DDL.
ALTER TABLE `table_xxx` FORCE, ALGORITHM=INPLACE, LOCK=NONE, will work.

But for some table, this will report not support error. The table has no FULLTEXT index, and after I drop one index on the table, it still not work, then I readd the index, after readd, the online DDL worked.

I don't know why this happens. My index has column datetime, varchar, longint type field.

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