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nodeWorktablescan.h File Reference
#include "nodes/execnodes.h"
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Functions

WorkTableScanStateExecInitWorkTableScan (WorkTableScan *node, EState *estate, int eflags)
 
void ExecReScanWorkTableScan (WorkTableScanState *node)
 

Function Documentation

◆ ExecInitWorkTableScan()

WorkTableScanState* ExecInitWorkTableScan ( WorkTableScan node,
EState estate,
int  eflags 
)

Definition at line 130 of file nodeWorktablescan.c.

131 {
132  WorkTableScanState *scanstate;
133 
134  /* check for unsupported flags */
135  Assert(!(eflags & (EXEC_FLAG_BACKWARD | EXEC_FLAG_MARK)));
136 
137  /*
138  * WorkTableScan should not have any children.
139  */
140  Assert(outerPlan(node) == NULL);
141  Assert(innerPlan(node) == NULL);
142 
143  /*
144  * create new WorkTableScanState for node
145  */
146  scanstate = makeNode(WorkTableScanState);
147  scanstate->ss.ps.plan = (Plan *) node;
148  scanstate->ss.ps.state = estate;
149  scanstate->ss.ps.ExecProcNode = ExecWorkTableScan;
150  scanstate->rustate = NULL; /* we'll set this later */
151 
152  /*
153  * Miscellaneous initialization
154  *
155  * create expression context for node
156  */
157  ExecAssignExprContext(estate, &scanstate->ss.ps);
158 
159  /*
160  * tuple table initialization
161  */
162  ExecInitResultTypeTL(&scanstate->ss.ps);
163 
164  /* signal that return type is not yet known */
165  scanstate->ss.ps.resultopsset = true;
166  scanstate->ss.ps.resultopsfixed = false;
167 
168  ExecInitScanTupleSlot(estate, &scanstate->ss, NULL, &TTSOpsMinimalTuple);
169 
170  /*
171  * initialize child expressions
172  */
173  scanstate->ss.ps.qual =
174  ExecInitQual(node->scan.plan.qual, (PlanState *) scanstate);
175 
176  /*
177  * Do not yet initialize projection info, see ExecWorkTableScan() for
178  * details.
179  */
180 
181  return scanstate;
182 }
#define Assert(condition)
Definition: c.h:858
ExprState * ExecInitQual(List *qual, PlanState *parent)
Definition: execExpr.c:220
void ExecInitScanTupleSlot(EState *estate, ScanState *scanstate, TupleDesc tupledesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:1898
void ExecInitResultTypeTL(PlanState *planstate)
Definition: execTuples.c:1842
const TupleTableSlotOps TTSOpsMinimalTuple
Definition: execTuples.c:86
void ExecAssignExprContext(EState *estate, PlanState *planstate)
Definition: execUtils.c:483
#define EXEC_FLAG_BACKWARD
Definition: executor.h:68
#define EXEC_FLAG_MARK
Definition: executor.h:69
static TupleTableSlot * ExecWorkTableScan(PlanState *pstate)
#define makeNode(_type_)
Definition: nodes.h:155
#define innerPlan(node)
Definition: plannodes.h:181
#define outerPlan(node)
Definition: plannodes.h:182
bool resultopsset
Definition: execnodes.h:1202
ExprState * qual
Definition: execnodes.h:1138
Plan * plan
Definition: execnodes.h:1117
EState * state
Definition: execnodes.h:1119
bool resultopsfixed
Definition: execnodes.h:1198
ExecProcNodeMtd ExecProcNode
Definition: execnodes.h:1123
PlanState ps
Definition: execnodes.h:1564
RecursiveUnionState * rustate
Definition: execnodes.h:2027

References Assert, EXEC_FLAG_BACKWARD, EXEC_FLAG_MARK, ExecAssignExprContext(), ExecInitQual(), ExecInitResultTypeTL(), ExecInitScanTupleSlot(), PlanState::ExecProcNode, ExecWorkTableScan(), innerPlan, makeNode, outerPlan, PlanState::plan, ScanState::ps, PlanState::qual, PlanState::resultopsfixed, PlanState::resultopsset, WorkTableScanState::rustate, WorkTableScan::scan, WorkTableScanState::ss, PlanState::state, and TTSOpsMinimalTuple.

Referenced by ExecInitNode().

◆ ExecReScanWorkTableScan()

void ExecReScanWorkTableScan ( WorkTableScanState node)

Definition at line 191 of file nodeWorktablescan.c.

192 {
193  if (node->ss.ps.ps_ResultTupleSlot)
195 
196  ExecScanReScan(&node->ss);
197 
198  /* No need (or way) to rescan if ExecWorkTableScan not called yet */
199  if (node->rustate)
201 }
void ExecScanReScan(ScanState *node)
Definition: execScan.c:297
TupleTableSlot * ps_ResultTupleSlot
Definition: execnodes.h:1155
Tuplestorestate * working_table
Definition: execnodes.h:1511
void tuplestore_rescan(Tuplestorestate *state)
Definition: tuplestore.c:1233
static TupleTableSlot * ExecClearTuple(TupleTableSlot *slot)
Definition: tuptable.h:454

References ExecClearTuple(), ExecScanReScan(), ScanState::ps, PlanState::ps_ResultTupleSlot, WorkTableScanState::rustate, WorkTableScanState::ss, tuplestore_rescan(), and RecursiveUnionState::working_table.

Referenced by ExecReScan().