/* ----------------------------------------------------------------
* ExecSeqRestrPos
*
* Restores scan position.
* ----------------------------------------------------------------
*/
void
ExecSeqRestrPos(SeqScanState *node)
{
HeapScanDesc scan = node->ss_currentScanDesc;
/*
* Clear any reference to the previously returned tuple. This is needed
* because the slot is simply pointing at scan->rs_cbuf, which
* heap_restrpos will change; we'd have an internally inconsistent slot if
* we didn't do this.
*/
ExecClearTuple(node->ss_ScanTupleSlot);
heap_restrpos(scan);
}
/* ----------------------------------------------------------------
* ExecSeqRestrPos
*
* Restores scan position.
* ----------------------------------------------------------------
*/
void
ExecSeqRestrPos(SeqScanState *node)
{
HeapScanDesc scan = node->ss_currentScanDesc;
Assert((node->scan_state & SCAN_SCAN) != 0);
Assert((node->scan_state & SCAN_MARKPOS) != 0);
/*
* Clear any reference to the previously returned tuple. This is needed
* because the slot is simply pointing at scan->rs_cbuf, which
* heap_restrpos will change; we'd have an internally inconsistent slot if
* we didn't do this.
*/
ExecClearTuple(node->ss_ScanTupleSlot);
heap_restrpos(scan);
Gpmon_M_Incr(GpmonPktFromSeqScanState(node), GPMON_SEQSCAN_RESTOREPOS);
CheckSendPlanStateGpmonPkt(&node->ps);
node->scan_state &= (~ ((int) SCAN_MARKPOS));
}
void
RestrPosHeapRelation(ScanState *scanState)
{
Assert(IsA(scanState, TableScanState) ||
IsA(scanState, DynamicTableScanState));
SeqScanState *node = (SeqScanState *)scanState;
Assert((node->ss.scan_state & SCAN_SCAN) != 0);
Assert((node->ss.scan_state & SCAN_MARKPOS) != 0);
/*
* Clear any reference to the previously returned tuple. This is needed
* because the slot is simply pointing at scan->rs_cbuf, which
* heap_restrpos will change; we'd have an internally inconsistent slot if
* we didn't do this.
*/
ExecClearTuple(node->ss.ss_ScanTupleSlot);
Assert(node->opaque != NULL &&
node->opaque->ss_currentScanDesc != NULL);
heap_restrpos(node->opaque->ss_currentScanDesc);
node->ss.scan_state &= (~ ((int) SCAN_MARKPOS));
}
