M Tarkeshwar Rao schrieb am 06.11.2015 um 04:52: > one thing in oracle is there any difference between “DROP PRIMARY > KEY” used directly in oracle to drop primary key, or “DROP CONSTRAINT > CDRAUDITPOINT_pk”, as first syntax is not available in postgres and > we need to give primary key name as constraint to delete a key. SO > right now to delete primary key I am using second approach, so is > there any difference between two?
Unlike Oracle, Postgres gives the PK constraint a sensible (and reproducible) name. So even if you did not specify a constraint name when creating the index, you know the name: it's always "tablename_pkey". The statement: create table foo (id integer primary key); will create a PK constraint named "foo_pkey", and therefore you can drop it using: alter table foo drop constraint foo_pkey; I don't know which name gets chosen when the table name is so long that adding _pkey it would yield an identifier that is too long (>63 characters) But having an "alter table drop primary key" would indeed be nice. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
