Sergei Golubchik 3f240bff80 MDEV-13097 Online alter of a partitioned MyISAM table with auto_increment ...

MyISAM only allows online alter if autoincrement didn't change.
MyISAM detects that by comparing new autoinc value from create_info,
with the old one, stored in MYI. But in partitioned tables,
create_info->auto_increment_value is for the whole table, max of
autoinc values of individual MYI partitions. So *some* MYI partitions
will inevitably think that alter table changes auto_increment value
and will deny online alter.

Fix: only compare autoinc values, if the user has used AUTO_INCREMENT
in the ALTER TABLE statement.

2017-06-22 12:56:33 +02:00

3.8 KiB

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