The Ultimate Guide to High Availability with MariaDB

InnoDB Online DDL Operations with ALGORITHM=NOCOPY

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Currently, the following operations are supported by InnoDB for ALGORITHM=NOCOPY:

  • Adding a non-primary index.

The following will change data files (ADD INDEX), but not rebuild the table:

CREATE TABLE t1 (a INT, e ENUM ('red','green'));
ALTER TABLE t ADD INDEX(b), ALGORITHM=NOCOPY;

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