Edmund Dengler <edmundd(at)eSentire(dot)com> writes:
> This table has 3 foreign keys, but that should not matter during deletes.
Richard was inquiring about foreign keys linking *into* this table, not
out of it.
In particular, foreign keys that don't have indexes on the referencing
columns; those will incur seqscans to check for appearances of the value
you are deleting.
regards, tom lane