Add MySQLIdentityColumnMaxValueIncrementer
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The new `DataFieldMaxValueIncrementer` can be used with identity columns in MySQL 8.0 or later.
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The PR adds
MySQLIdentityColumnMaxValueIncrementerto resolve #18989.Using a MySQL auto-increment column as a sequence with
AbstractIdentityColumnMaxValueIncrementerwas not practical before MySQL 8 as the auto-increment counter was only stored in memory but not persisted. With MySQL 8.0 and InnoDB, this behavior has changed: https://dev.mysql.com/doc/refman/8.0/en/innodb-auto-increment-handling.html#innodb-auto-increment-initializationWith MySQL 8 and InnoDB, the new incrementer can be used safely in a setup with active-active replication. If the database parameters
auto_increment_incrementandauto_increment_offsetare configured appropriately, the incrementer will not produce duplicate ids even if different database instances are queried.I've assembled a toy setup with a multi-threaded test against two MySQL instances with active-active replication here: https://github.com/hpoettker/mysql-incrementer-demo