* Stephen Frost (sfr...@snowman.net) wrote: > * Tom Lane (t...@sss.pgh.pa.us) wrote: > > I assume he's talking about the object reference representation used in > > pg_depend, which is actually class OID + object OID + sub-object ID. > > The only object type that has sub-objects at the moment is tables, > > wherein the sub-objects are columns and the sub-object IDs are column > > numbers. The sub-object ID is zero for all other cases. > > You're right, of course, but for some reason I thought that there was > another usage of it besides just the table/column case.
Ah, I realize what I was thinking about now.. The dependency system has
two flavors (pg_depend and pg_shdepend). We had SubIDs for columns in
pg_depend but not pg_shdepend- until column-level privs were added which
meant we could have roles depend on columns (due to privileges on that
column). To clarify- pg_depend is for database dependencies while
pg_shdepend is for cluster dependencies.
Thanks,
Stephen
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