...lier generators. It would be easier to write in bash, but let's have it in Python just to prove that we can, and to serve as a template for more interesting generators. """ impo…...owever, if a valid CHECK constraint exists (and is not dropped in the same command) which proves no NULL can exist, then the table scan is skipped. If this table is a partition,…...ll be skipped if the default partition is a foreign table or if it has a constraint which proves that it cannot contain rows which should be placed in the new partition. When cr…