/*
* Returns if relation represented by oid and Form_pg_class entry
* is publishable.
*
* Does same checks as the above, but does not need relation to be opened
* and also does not throw errors.
*
* Note this also excludes all tables with relid < FirstNormalObjectId,
* ie all tables created during initdb. This mainly affects the preinstalled
* information_schema. (IsCatalogClass() only checks for these inside
* pg_catalog and toast schemas.)
*/
static bool
is_publishable_class(Oid relid, Form_pg_class reltuple)
{
return reltuple->relkind == RELKIND_RELATION &&
!IsCatalogClass(relid, reltuple) &&
reltuple->relpersistence == RELPERSISTENCE_PERMANENT &&
relid >= FirstNormalObjectId;
}
/*
* IsCatalogRelation
* True iff the relation is a system catalog, or the toast table for
* a system catalog. By a system catalog, we mean one that created
* in the pg_catalog schema during initdb. As with IsSystemRelation(),
* user-created relations in pg_catalog don't count as system catalogs.
*
* Note that IsSystemRelation() returns true for ALL toast relations,
* but this function returns true only for toast relations of system
* catalogs.
*/
bool
IsCatalogRelation(Relation relation)
{
return IsCatalogClass(RelationGetRelid(relation), relation->rd_rel);
}
/*
* IsSystemClass
* Like the above, but takes a Form_pg_class as argument.
* Used when we do not want to open the relation and have to
* search pg_class directly.
*/
bool
IsSystemClass(Oid relid, Form_pg_class reltuple)
{
return IsToastClass(reltuple) || IsCatalogClass(relid, reltuple);
}