=?ISO-8859-1?Q?St=E9phane_Schildknecht?= <stephane.schildknecht@xxxxxxxxxxxxxxxx> writes: > pg_dump and pg_dumpall have the -o option that should tell them to > include oids in dump. I didn't chose this option, and the dump doesn't > include "WITH OIDS", but the tables are created with oids when restoring > this dump. You misunderstand what that option is for: it's for trying to preserve the exact OID values present in your old installation. It's not about adding or removing OID columns. > Is there a way to prevent creating table with oids ? No, and I don't think it'd be within pg_dump's charter to editorialize on table definitions like that. Instead see ALTER TABLE SET WITHOUT OIDS. regards, tom lane