For all intent and purpose, pg_index.indisprimary can be added to that list. Can't make a primary key without a pg_constraint entry.
The below are also reported unused by the documentation: pg_class.relukeys pg_class.relfkeys pg_class.relrefs pg_index.indisclustered pg_index.indreference On Mon, 2002-07-15 at 18:53, Peter Eisentraut wrote: > The following system table columns are currently unused and don't appear > to be in the line of resurrection. > pg_language.lancompiler > pg_operator.oprprec > pg_operator.oprisleft > pg_proc.probyte_pct > pg_proc.properbyte_cpu > pg_proc.propercall_cpu > pg_proc.prooutin_ratio > pg_shadow.usetrace > pg_type.typprtlen > pg_type.typreceive > pg_type.typsend > > This adds up to quite some space -- on disk and on the screen. I think we > should remove them. ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
