Zkuste toto:
ALTER SEQUENCE foo_id_seq OWNED BY NONE
pak byste měli být schopni upustit od stolu.
Chcete-li získat "vlastníka" sekvence, použijte následující dotaz
SELECT s.relname as sequence_name,
n.nspname as sequence_schema,
t.relname as related_table,
a.attname as related_column
FROM pg_class s, pg_depend d, pg_class t, pg_attribute a, pg_namespace n
WHERE s.relkind = 'S'
AND n.oid = s.relnamespace
AND d.objid = s.oid
AND d.refobjid = t.oid
AND (d.refobjid, d.refobjsubid) = (a.attrelid, a.attnum)