Function GetForeignTableSegNumbers

src/backend/foreign/foreign.c:381–410

}

static int
GetForeignTableSegNumbers(Oid relid)
{
	Relation 	foreignTableRel;
	ScanKeyData	ftkey;
	SysScanDesc	ftscan;
	int 		number = 0;


	foreignTableRel = table_open(ForeignTableRelationSegId, AccessShareLock);

	ScanKeyInit(&ftkey,
				Anum_pg_foreign_table_seg_ftsrelid,
				BTEqualStrategyNumber, F_OIDEQ,
				ObjectIdGetDatum(relid));

	ftscan = systable_beginscan(foreignTableRel, InvalidOid,
								false, NULL, 1, &ftkey);

	while (HeapTupleIsValid(systable_getnext(ftscan)))
	{
		number++;
	}

	systable_endscan(ftscan);

	table_close(foreignTableRel, AccessShareLock);

	return number;
}

static ForeignTable *
GetForeignTableOnSegment(Oid relid)