alaski pointed out that the constraint doesn't even touch the column that I'm trying to alter, so there must be something else going on. One possibility is that we're actually recreating the entire table, not just the column being altered.
alaski pointed out that the constraint doesn't even touch the column that I'm trying to alter, so there must be something else going on. One possibility is that we're actually recreating the entire table, not just the column being altered.