Only as a homework, is this function completely useless?
ItemPointerData
systable_scan_next(Relation heapRelation,
Oid indexId,
bool indexOK,
Snapshot snapshot,
int nkeys, ScanKey key)
{
SysScanDesc scan;
HeapTuple htup;
ItemPointerData tid;
scan = systable_beginscan(heapRelation, indexId, indexOK, snapshot,
nkeys, key);
htup = systable_getnext(scan);
if (HeapTupleIsValid(htup))
tid = &htup->t_self;
else
tid = NULL;
systable_endscan(scan);
return tid;
}
regards,
Ranier Vilela
