/* ----------------------------------------------------------------
* ExecInitSeqScan
* ----------------------------------------------------------------
*/
SeqScanState *
ExecInitSeqScan(SeqScan *node, EState *estate, int eflags)
{
SeqScanState *scanstate;
AttrNumber ctid_attrno;
/*
* Once upon a time it was possible to have an outerPlan of a SeqScan, but
* not any more.
*/
Assert(outerPlan(node) == NULL);
Assert(innerPlan(node) == NULL);
/*
* create state structure
*/
scanstate = makeNode(SeqScanState);
scanstate->ps.plan = (Plan *) node;
scanstate->ps.state = estate;
/*
* Miscellaneous initialization
*
* create expression context for node
*/
ExecAssignExprContext(estate, &scanstate->ps);
/*
* initialize child expressions
*/
scanstate->ps.targetlist = (List *)
ExecInitExpr((Expr *) node->plan.targetlist,
(PlanState *) scanstate);
scanstate->ps.qual = (List *)
ExecInitExpr((Expr *) node->plan.qual,
(PlanState *) scanstate);
#define SEQSCAN_NSLOTS 2
/*
* tuple table initialization
*/
ExecInitResultTupleSlot(estate, &scanstate->ps);
ExecInitScanTupleSlot(estate, scanstate);
/*
* initialize scan relation
*/
InitScanRelation(scanstate, estate);
scanstate->ps.ps_TupFromTlist = false;
/*
* Initialize result tuple type and projection info.
*/
ExecAssignResultTypeFromTL(&scanstate->ps);
ExecAssignScanProjectionInfo(scanstate);
return scanstate;
}
/* ----------------------------------------------------------------
* ExecInitSeqScan
* ----------------------------------------------------------------
*/
SeqScanState *
ExecInitSeqScan(SeqScan *node, EState *estate, int eflags)
{
SeqScanState *scanstate;
/*
* Once upon a time it was possible to have an outerPlan of a SeqScan, but
* not any more.
*/
Assert(outerPlan(node) == NULL);
Assert(innerPlan(node) == NULL);
/*
* create state structure
*/
scanstate = makeNode(SeqScanState);
scanstate->ss.ps.plan = (Plan *) node;
scanstate->ss.ps.state = estate;
scanstate->ss.ps.ExecProcNode = ExecSeqScan;
/*
* Miscellaneous initialization
*
* create expression context for node
*/
ExecAssignExprContext(estate, &scanstate->ss.ps);
/*
* initialize child expressions
*/
scanstate->ss.ps.qual =
ExecInitQual(node->plan.qual, (PlanState *) scanstate);
/*
* tuple table initialization
*/
ExecInitResultTupleSlot(estate, &scanstate->ss.ps);
ExecInitScanTupleSlot(estate, &scanstate->ss);
/*
* initialize scan relation
*/
InitScanRelation(scanstate, estate, eflags);
/*
* Initialize result tuple type and projection info.
*/
ExecAssignResultTypeFromTL(&scanstate->ss.ps);
ExecAssignScanProjectionInfo(&scanstate->ss);
return scanstate;
}
/* ----------------------------------------------------------------
* ExecInitSeqScan
* ----------------------------------------------------------------
*/
SeqScanState *
ExecInitSeqScan(SeqScan *node, EState *estate, int eflags)
{
SeqScanState *scanstate;
/*
* Once upon a time it was possible to have an outerPlan of a SeqScan, but
* not any more.
*/
Assert(outerPlan(node) == NULL);
Assert(innerPlan(node) == NULL);
/*
* create state structure
*/
scanstate = makeNode(SeqScanState);
scanstate->ps.plan = (Plan *) node;
scanstate->ps.state = estate;
scanstate->ss->scan_state = SCAN_INIT;
/*
* Miscellaneous initialization
*
* create expression context for node
*/
ExecAssignExprContext(estate, &scanstate->ps);
/*
* initialize child expressions
*/
scanstate->ps.targetlist = (List *)
ExecInitExpr((Expr *) node->plan.targetlist,
(PlanState *) scanstate);
scanstate->ps.qual = (List *)
ExecInitExpr((Expr *) node->plan.qual,
(PlanState *) scanstate);
#define SEQSCAN_NSLOTS 2
/*
* tuple table initialization
*/
ExecInitResultTupleSlot(estate, &scanstate->ps);
ExecInitScanTupleSlot(estate, scanstate);
/*
* initialize scan relation
*/
InitScanRelation(scanstate, estate);
/*
* Initialize result tuple type and projection info.
*/
ExecAssignResultTypeFromTL(&scanstate->ps);
ExecAssignScanProjectionInfo(scanstate);
initGpmonPktForSeqScan((Plan *)node, &scanstate->ps.gpmon_pkt, estate);
/*
* If eflag contains EXEC_FLAG_REWIND or EXEC_FLAG_BACKWARD or EXEC_FLAG_MARK,
* then this node is not eager free safe.
*/
scanstate->ps.delayEagerFree =
((eflags & (EXEC_FLAG_REWIND | EXEC_FLAG_BACKWARD | EXEC_FLAG_MARK)) != 0);
return scanstate;
}
