Function populate_typ_list

src/backend/bootstrap/bootstrap.c:919–946

---------------- * populate_typ_list * * Load the Typ list by reading pg_type. * ---------------- */

 * ----------------
 */
static void
populate_typ_list(void)
{
	Relation	rel;
	TableScanDesc scan;
	HeapTuple	tup;
	MemoryContext old;

	Assert(Typ == NIL);

	rel = table_open(TypeRelationId, NoLock);
	scan = table_beginscan_catalog(rel, 0, NULL);
	old = MemoryContextSwitchTo(TopMemoryContext);
	while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
	{
		Form_pg_type typForm = (Form_pg_type) GETSTRUCT(tup);
		struct typmap *newtyp;

		newtyp = (struct typmap *) palloc(sizeof(struct typmap));
		Typ = lappend(Typ, newtyp);

		newtyp->am_oid = typForm->oid;
		memcpy(&newtyp->am_typ, typForm, sizeof(newtyp->am_typ));
	}
	MemoryContextSwitchTo(old);
	table_endscan(scan);
	table_close(rel, NoLock);
}

/* ----------------
 *		gettype