Sergei Golubchik 499e617182 MDEV-25403 ALTER TABLE wrongly checks for field's default value if AFTER is used ...

When a column is added to an non-empty table, existing rows will have
a column's default value for existing rows. Or a "zero value" if the
column has no default.

But this check should be skipped when an existing column is altered.

2021-04-15 09:42:37 +02:00

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