Nikita Malyavin 1f5ca66e53 MDEV-26866 FOREIGN KEY…SET NULL corrupts an index on a virtual column ...

The initial test case for MySQL Bug #33053297 is based on
mysql/mysql-server@27130e2507.

innobase_get_field_from_update_vector is not a suitable function to fetch
updated row info, as well as parent table's update vector is not always
suitable. For instance, in case of DELETE it contains undefined data.

castade->update vector seems to be good enough to fetch all base columns
update data, and besides faster, and less error-prone.

2021-10-28 07:32:27 +03:00

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