To automate this, you could define the foreign key constraint with ON DELETE CASCADE.
So when deleting first delete child rows and then parent.
On Thu, Jan 24, 2019 at 12:05 PM Nagy László Zsolt <gandalf@xxxxxxxxxxxx> wrote:
Hello,
I have deferred the only fk constraint to this table inside a
transaction, but I still cannot delete rows from it.
How is that possible?
master=> ALTER TABLE doc.display_mode disable trigger user;
ALTER TABLE
master=> BEGIN;
BEGIN
master=> SET CONSTRAINTS doc.fk_book_display_mode_id DEFERRED;
SET CONSTRAINTS
master=> DELETE FROM doc.display_mode;
ERROR: update or delete on table "display_mode" violates foreign key
constraint "fk_book_display_mode_id" on table "book"
DETAIL: Key (id)=(1) is still referenced from table "book".
master=>
