PostgreSQL Source Code: src/backend/executor/nodeForeignscan.c Source File

PostgreSQL Source Code git master
nodeForeignscan.c
Go to the documentation of this file.
1/*-------------------------------------------------------------------------
2 *
3 * nodeForeignscan.c
4 * Routines to support scans of foreign tables
5 *
6 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 *
10 * IDENTIFICATION
11 * src/backend/executor/nodeForeignscan.c
12 *
13 *-------------------------------------------------------------------------
14 */
15/*
16 * INTERFACE ROUTINES
17 *
18 * ExecForeignScan scans a foreign table.
19 * ExecInitForeignScan creates and initializes state info.
20 * ExecReScanForeignScan rescans the foreign relation.
21 * ExecEndForeignScan releases any resources allocated.
22 */
23#include "postgres.h"
24
25#include "executor/executor.h"
26#include "executor/nodeForeignscan.h"
27#include "foreign/fdwapi.h"
28#include "utils/rel.h"
29
30static TupleTableSlot *ForeignNext(ForeignScanState *node);
31static bool ForeignRecheck(ForeignScanState *node, TupleTableSlot *slot);
32
33
34/* ----------------------------------------------------------------
35 * ForeignNext
36 *
37 * This is a workhorse for ExecForeignScan
38 * ----------------------------------------------------------------
39 */
40static TupleTableSlot *
41 ForeignNext(ForeignScanState *node)
42{
43 TupleTableSlot *slot;
44 ForeignScan *plan = (ForeignScan *) node->ss.ps.plan;
45 ExprContext *econtext = node->ss.ps.ps_ExprContext;
46 MemoryContext oldcontext;
47
48 /* Call the Iterate function in short-lived context */
49 oldcontext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory);
50 if (plan->operation != CMD_SELECT)
51 {
52 /*
53 * direct modifications cannot be re-evaluated, so shouldn't get here
54 * during EvalPlanQual processing
55 */
56 Assert(node->ss.ps.state->es_epq_active == NULL);
57
58 slot = node->fdwroutine->IterateDirectModify(node);
59 }
60 else
61 slot = node->fdwroutine->IterateForeignScan(node);
62 MemoryContextSwitchTo(oldcontext);
63
64 /*
65 * Insert valid value into tableoid, the only actually-useful system
66 * column.
67 */
68 if (plan->fsSystemCol && !TupIsNull(slot))
69 slot->tts_tableOid = RelationGetRelid(node->ss.ss_currentRelation);
70
71 return slot;
72}
73
74/*
75 * ForeignRecheck -- access method routine to recheck a tuple in EvalPlanQual
76 */
77static bool
78 ForeignRecheck(ForeignScanState *node, TupleTableSlot *slot)
79{
80 FdwRoutine *fdwroutine = node->fdwroutine;
81 ExprContext *econtext;
82
83 /*
84 * extract necessary information from foreign scan node
85 */
86 econtext = node->ss.ps.ps_ExprContext;
87
88 /* Does the tuple meet the remote qual condition? */
89 econtext->ecxt_scantuple = slot;
90
91 ResetExprContext(econtext);
92
93 /*
94 * If an outer join is pushed down, RecheckForeignScan may need to store a
95 * different tuple in the slot, because a different set of columns may go
96 * to NULL upon recheck. Otherwise, it shouldn't need to change the slot
97 * contents, just return true or false to indicate whether the quals still
98 * pass. For simple cases, setting fdw_recheck_quals may be easier than
99 * providing this callback.
100 */
101 if (fdwroutine->RecheckForeignScan &&
102 !fdwroutine->RecheckForeignScan(node, slot))
103 return false;
104
105 return ExecQual(node->fdw_recheck_quals, econtext);
106}
107
108/* ----------------------------------------------------------------
109 * ExecForeignScan(node)
110 *
111 * Fetches the next tuple from the FDW, checks local quals, and
112 * returns it.
113 * We call the ExecScan() routine and pass it the appropriate
114 * access method functions.
115 * ----------------------------------------------------------------
116 */
117static TupleTableSlot *
118 ExecForeignScan(PlanState *pstate)
119{
120 ForeignScanState *node = castNode(ForeignScanState, pstate);
121 ForeignScan *plan = (ForeignScan *) node->ss.ps.plan;
122 EState *estate = node->ss.ps.state;
123
124 /*
125 * Ignore direct modifications when EvalPlanQual is active --- they are
126 * irrelevant for EvalPlanQual rechecking
127 */
128 if (estate->es_epq_active != NULL && plan->operation != CMD_SELECT)
129 return NULL;
130
131 return ExecScan(&node->ss,
132 (ExecScanAccessMtd) ForeignNext,
133 (ExecScanRecheckMtd) ForeignRecheck);
134}
135
136
137/* ----------------------------------------------------------------
138 * ExecInitForeignScan
139 * ----------------------------------------------------------------
140 */
141ForeignScanState *
142 ExecInitForeignScan(ForeignScan *node, EState *estate, int eflags)
143{
144 ForeignScanState *scanstate;
145 Relation currentRelation = NULL;
146 Index scanrelid = node->scan.scanrelid;
147 int tlistvarno;
148 FdwRoutine *fdwroutine;
149
150 /* check for unsupported flags */
151 Assert(!(eflags & (EXEC_FLAG_BACKWARD | EXEC_FLAG_MARK)));
152
153 /*
154 * create state structure
155 */
156 scanstate = makeNode(ForeignScanState);
157 scanstate->ss.ps.plan = (Plan *) node;
158 scanstate->ss.ps.state = estate;
159 scanstate->ss.ps.ExecProcNode = ExecForeignScan;
160
161 /*
162 * Miscellaneous initialization
163 *
164 * create expression context for node
165 */
166 ExecAssignExprContext(estate, &scanstate->ss.ps);
167
168 /*
169 * open the scan relation, if any; also acquire function pointers from the
170 * FDW's handler
171 */
172 if (scanrelid > 0)
173 {
174 currentRelation = ExecOpenScanRelation(estate, scanrelid, eflags);
175 scanstate->ss.ss_currentRelation = currentRelation;
176 fdwroutine = GetFdwRoutineForRelation(currentRelation, true);
177 }
178 else
179 {
180 /* We can't use the relcache, so get fdwroutine the hard way */
181 fdwroutine = GetFdwRoutineByServerId(node->fs_server);
182 }
183
184 /*
185 * Determine the scan tuple type. If the FDW provided a targetlist
186 * describing the scan tuples, use that; else use base relation's rowtype.
187 */
188 if (node->fdw_scan_tlist != NIL || currentRelation == NULL)
189 {
190 TupleDesc scan_tupdesc;
191
192 scan_tupdesc = ExecTypeFromTL(node->fdw_scan_tlist);
193 ExecInitScanTupleSlot(estate, &scanstate->ss, scan_tupdesc,
194 &TTSOpsHeapTuple);
195 /* Node's targetlist will contain Vars with varno = INDEX_VAR */
196 tlistvarno = INDEX_VAR;
197 }
198 else
199 {
200 TupleDesc scan_tupdesc;
201
202 /* don't trust FDWs to return tuples fulfilling NOT NULL constraints */
203 scan_tupdesc = CreateTupleDescCopy(RelationGetDescr(currentRelation));
204 ExecInitScanTupleSlot(estate, &scanstate->ss, scan_tupdesc,
205 &TTSOpsHeapTuple);
206 /* Node's targetlist will contain Vars with varno = scanrelid */
207 tlistvarno = scanrelid;
208 }
209
210 /* Don't know what an FDW might return */
211 scanstate->ss.ps.scanopsfixed = false;
212 scanstate->ss.ps.scanopsset = true;
213
214 /*
215 * Initialize result slot, type and projection.
216 */
217 ExecInitResultTypeTL(&scanstate->ss.ps);
218 ExecAssignScanProjectionInfoWithVarno(&scanstate->ss, tlistvarno);
219
220 /*
221 * initialize child expressions
222 */
223 scanstate->ss.ps.qual =
224 ExecInitQual(node->scan.plan.qual, (PlanState *) scanstate);
225 scanstate->fdw_recheck_quals =
226 ExecInitQual(node->fdw_recheck_quals, (PlanState *) scanstate);
227
228 /*
229 * Determine whether to scan the foreign relation asynchronously or not;
230 * this has to be kept in sync with the code in ExecInitAppend().
231 */
232 scanstate->ss.ps.async_capable = (((Plan *) node)->async_capable &&
233 estate->es_epq_active == NULL);
234
235 /*
236 * Initialize FDW-related state.
237 */
238 scanstate->fdwroutine = fdwroutine;
239 scanstate->fdw_state = NULL;
240
241 /*
242 * For the FDW's convenience, look up the modification target relation's
243 * ResultRelInfo. The ModifyTable node should have initialized it for us,
244 * see ExecInitModifyTable.
245 *
246 * Don't try to look up the ResultRelInfo when EvalPlanQual is active,
247 * though. Direct modifications cannot be re-evaluated as part of
248 * EvalPlanQual. The lookup wouldn't work anyway because during
249 * EvalPlanQual processing, EvalPlanQual only initializes the subtree
250 * under the ModifyTable, and doesn't run ExecInitModifyTable.
251 */
252 if (node->resultRelation > 0 && estate->es_epq_active == NULL)
253 {
254 if (estate->es_result_relations == NULL ||
255 estate->es_result_relations[node->resultRelation - 1] == NULL)
256 {
257 elog(ERROR, "result relation not initialized");
258 }
259 scanstate->resultRelInfo = estate->es_result_relations[node->resultRelation - 1];
260 }
261
262 /* Initialize any outer plan. */
263 if (outerPlan(node))
264 outerPlanState(scanstate) =
265 ExecInitNode(outerPlan(node), estate, eflags);
266
267 /*
268 * Tell the FDW to initialize the scan.
269 */
270 if (node->operation != CMD_SELECT)
271 {
272 /*
273 * Direct modifications cannot be re-evaluated by EvalPlanQual, so
274 * don't bother preparing the FDW.
275 *
276 * In case of an inherited UPDATE/DELETE with foreign targets there
277 * can be direct-modify ForeignScan nodes in the EvalPlanQual subtree,
278 * so we need to ignore such ForeignScan nodes during EvalPlanQual
279 * processing. See also ExecForeignScan/ExecReScanForeignScan.
280 */
281 if (estate->es_epq_active == NULL)
282 fdwroutine->BeginDirectModify(scanstate, eflags);
283 }
284 else
285 fdwroutine->BeginForeignScan(scanstate, eflags);
286
287 return scanstate;
288}
289
290/* ----------------------------------------------------------------
291 * ExecEndForeignScan
292 *
293 * frees any storage allocated through C routines.
294 * ----------------------------------------------------------------
295 */
296void
297 ExecEndForeignScan(ForeignScanState *node)
298{
299 ForeignScan *plan = (ForeignScan *) node->ss.ps.plan;
300 EState *estate = node->ss.ps.state;
301
302 /* Let the FDW shut down */
303 if (plan->operation != CMD_SELECT)
304 {
305 if (estate->es_epq_active == NULL)
306 node->fdwroutine->EndDirectModify(node);
307 }
308 else
309 node->fdwroutine->EndForeignScan(node);
310
311 /* Shut down any outer plan. */
312 if (outerPlanState(node))
313 ExecEndNode(outerPlanState(node));
314}
315
316/* ----------------------------------------------------------------
317 * ExecReScanForeignScan
318 *
319 * Rescans the relation.
320 * ----------------------------------------------------------------
321 */
322void
323 ExecReScanForeignScan(ForeignScanState *node)
324{
325 ForeignScan *plan = (ForeignScan *) node->ss.ps.plan;
326 EState *estate = node->ss.ps.state;
327 PlanState *outerPlan = outerPlanState(node);
328
329 /*
330 * Ignore direct modifications when EvalPlanQual is active --- they are
331 * irrelevant for EvalPlanQual rechecking
332 */
333 if (estate->es_epq_active != NULL && plan->operation != CMD_SELECT)
334 return;
335
336 node->fdwroutine->ReScanForeignScan(node);
337
338 /*
339 * If chgParam of subnode is not null then plan will be re-scanned by
340 * first ExecProcNode. outerPlan may also be NULL, in which case there is
341 * nothing to rescan at all.
342 */
343 if (outerPlan != NULL && outerPlan->chgParam == NULL)
344 ExecReScan(outerPlan);
345
346 ExecScanReScan(&node->ss);
347}
348
349/* ----------------------------------------------------------------
350 * ExecForeignScanEstimate
351 *
352 * Informs size of the parallel coordination information, if any
353 * ----------------------------------------------------------------
354 */
355void
356 ExecForeignScanEstimate(ForeignScanState *node, ParallelContext *pcxt)
357{
358 FdwRoutine *fdwroutine = node->fdwroutine;
359
360 if (fdwroutine->EstimateDSMForeignScan)
361 {
362 node->pscan_len = fdwroutine->EstimateDSMForeignScan(node, pcxt);
363 shm_toc_estimate_chunk(&pcxt->estimator, node->pscan_len);
364 shm_toc_estimate_keys(&pcxt->estimator, 1);
365 }
366}
367
368/* ----------------------------------------------------------------
369 * ExecForeignScanInitializeDSM
370 *
371 * Initialize the parallel coordination information
372 * ----------------------------------------------------------------
373 */
374void
375 ExecForeignScanInitializeDSM(ForeignScanState *node, ParallelContext *pcxt)
376{
377 FdwRoutine *fdwroutine = node->fdwroutine;
378
379 if (fdwroutine->InitializeDSMForeignScan)
380 {
381 int plan_node_id = node->ss.ps.plan->plan_node_id;
382 void *coordinate;
383
384 coordinate = shm_toc_allocate(pcxt->toc, node->pscan_len);
385 fdwroutine->InitializeDSMForeignScan(node, pcxt, coordinate);
386 shm_toc_insert(pcxt->toc, plan_node_id, coordinate);
387 }
388}
389
390/* ----------------------------------------------------------------
391 * ExecForeignScanReInitializeDSM
392 *
393 * Reset shared state before beginning a fresh scan.
394 * ----------------------------------------------------------------
395 */
396void
397 ExecForeignScanReInitializeDSM(ForeignScanState *node, ParallelContext *pcxt)
398{
399 FdwRoutine *fdwroutine = node->fdwroutine;
400
401 if (fdwroutine->ReInitializeDSMForeignScan)
402 {
403 int plan_node_id = node->ss.ps.plan->plan_node_id;
404 void *coordinate;
405
406 coordinate = shm_toc_lookup(pcxt->toc, plan_node_id, false);
407 fdwroutine->ReInitializeDSMForeignScan(node, pcxt, coordinate);
408 }
409}
410
411/* ----------------------------------------------------------------
412 * ExecForeignScanInitializeWorker
413 *
414 * Initialization according to the parallel coordination information
415 * ----------------------------------------------------------------
416 */
417void
418 ExecForeignScanInitializeWorker(ForeignScanState *node,
419 ParallelWorkerContext *pwcxt)
420{
421 FdwRoutine *fdwroutine = node->fdwroutine;
422
423 if (fdwroutine->InitializeWorkerForeignScan)
424 {
425 int plan_node_id = node->ss.ps.plan->plan_node_id;
426 void *coordinate;
427
428 coordinate = shm_toc_lookup(pwcxt->toc, plan_node_id, false);
429 fdwroutine->InitializeWorkerForeignScan(node, pwcxt->toc, coordinate);
430 }
431}
432
433/* ----------------------------------------------------------------
434 * ExecShutdownForeignScan
435 *
436 * Gives FDW chance to stop asynchronous resource consumption
437 * and release any resources still held.
438 * ----------------------------------------------------------------
439 */
440void
441 ExecShutdownForeignScan(ForeignScanState *node)
442{
443 FdwRoutine *fdwroutine = node->fdwroutine;
444
445 if (fdwroutine->ShutdownForeignScan)
446 fdwroutine->ShutdownForeignScan(node);
447}
448
449/* ----------------------------------------------------------------
450 * ExecAsyncForeignScanRequest
451 *
452 * Asynchronously request a tuple from a designed async-capable node
453 * ----------------------------------------------------------------
454 */
455void
456 ExecAsyncForeignScanRequest(AsyncRequest *areq)
457{
458 ForeignScanState *node = (ForeignScanState *) areq->requestee;
459 FdwRoutine *fdwroutine = node->fdwroutine;
460
461 Assert(fdwroutine->ForeignAsyncRequest != NULL);
462 fdwroutine->ForeignAsyncRequest(areq);
463}
464
465/* ----------------------------------------------------------------
466 * ExecAsyncForeignScanConfigureWait
467 *
468 * In async mode, configure for a wait
469 * ----------------------------------------------------------------
470 */
471void
472 ExecAsyncForeignScanConfigureWait(AsyncRequest *areq)
473{
474 ForeignScanState *node = (ForeignScanState *) areq->requestee;
475 FdwRoutine *fdwroutine = node->fdwroutine;
476
477 Assert(fdwroutine->ForeignAsyncConfigureWait != NULL);
478 fdwroutine->ForeignAsyncConfigureWait(areq);
479}
480
481/* ----------------------------------------------------------------
482 * ExecAsyncForeignScanNotify
483 *
484 * Callback invoked when a relevant event has occurred
485 * ----------------------------------------------------------------
486 */
487void
488 ExecAsyncForeignScanNotify(AsyncRequest *areq)
489{
490 ForeignScanState *node = (ForeignScanState *) areq->requestee;
491 FdwRoutine *fdwroutine = node->fdwroutine;
492
493 Assert(fdwroutine->ForeignAsyncNotify != NULL);
494 fdwroutine->ForeignAsyncNotify(areq);
495}
unsigned int Index
Definition: c.h:619
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:226
void ExecReScan(PlanState *node)
Definition: execAmi.c:77
ExprState * ExecInitQual(List *qual, PlanState *parent)
Definition: execExpr.c:229
void ExecEndNode(PlanState *node)
Definition: execProcnode.c:562
PlanState * ExecInitNode(Plan *node, EState *estate, int eflags)
Definition: execProcnode.c:142
void ExecAssignScanProjectionInfoWithVarno(ScanState *node, int varno)
Definition: execScan.c:94
TupleTableSlot * ExecScan(ScanState *node, ExecScanAccessMtd accessMtd, ExecScanRecheckMtd recheckMtd)
Definition: execScan.c:47
void ExecScanReScan(ScanState *node)
Definition: execScan.c:108
void ExecInitScanTupleSlot(EState *estate, ScanState *scanstate, TupleDesc tupledesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:2000
void ExecInitResultTypeTL(PlanState *planstate)
Definition: execTuples.c:1944
const TupleTableSlotOps TTSOpsHeapTuple
Definition: execTuples.c:85
TupleDesc ExecTypeFromTL(List *targetList)
Definition: execTuples.c:2127
void ExecAssignExprContext(EState *estate, PlanState *planstate)
Definition: execUtils.c:485
Relation ExecOpenScanRelation(EState *estate, Index scanrelid, int eflags)
Definition: execUtils.c:742
#define outerPlanState(node)
Definition: execnodes.h:1255
#define EXEC_FLAG_BACKWARD
Definition: executor.h:69
#define ResetExprContext(econtext)
Definition: executor.h:647
static bool ExecQual(ExprState *state, ExprContext *econtext)
Definition: executor.h:516
bool(* ExecScanRecheckMtd)(ScanState *node, TupleTableSlot *slot)
Definition: executor.h:577
TupleTableSlot *(* ExecScanAccessMtd)(ScanState *node)
Definition: executor.h:576
#define EXEC_FLAG_MARK
Definition: executor.h:70
FdwRoutine * GetFdwRoutineForRelation(Relation relation, bool makecopy)
Definition: foreign.c:443
FdwRoutine * GetFdwRoutineByServerId(Oid serverid)
Definition: foreign.c:378
Assert(PointerIsAligned(start, uint64))
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:81
ForeignScanState * ExecInitForeignScan(ForeignScan *node, EState *estate, int eflags)
void ExecForeignScanInitializeDSM(ForeignScanState *node, ParallelContext *pcxt)
void ExecShutdownForeignScan(ForeignScanState *node)
void ExecAsyncForeignScanNotify(AsyncRequest *areq)
void ExecAsyncForeignScanConfigureWait(AsyncRequest *areq)
static TupleTableSlot * ExecForeignScan(PlanState *pstate)
void ExecAsyncForeignScanRequest(AsyncRequest *areq)
void ExecReScanForeignScan(ForeignScanState *node)
void ExecForeignScanReInitializeDSM(ForeignScanState *node, ParallelContext *pcxt)
void ExecEndForeignScan(ForeignScanState *node)
static bool ForeignRecheck(ForeignScanState *node, TupleTableSlot *slot)
static TupleTableSlot * ForeignNext(ForeignScanState *node)
void ExecForeignScanEstimate(ForeignScanState *node, ParallelContext *pcxt)
void ExecForeignScanInitializeWorker(ForeignScanState *node, ParallelWorkerContext *pwcxt)
@ CMD_SELECT
Definition: nodes.h:275
#define makeNode(_type_)
Definition: nodes.h:161
#define castNode(_type_, nodeptr)
Definition: nodes.h:182
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:124
#define NIL
Definition: pg_list.h:68
#define plan(x)
Definition: pg_regress.c:161
#define outerPlan(node)
Definition: plannodes.h:252
#define INDEX_VAR
Definition: primnodes.h:244
#define RelationGetRelid(relation)
Definition: rel.h:514
#define RelationGetDescr(relation)
Definition: rel.h:540
void * shm_toc_allocate(shm_toc *toc, Size nbytes)
Definition: shm_toc.c:88
void shm_toc_insert(shm_toc *toc, uint64 key, void *address)
Definition: shm_toc.c:171
void * shm_toc_lookup(shm_toc *toc, uint64 key, bool noError)
Definition: shm_toc.c:232
#define shm_toc_estimate_chunk(e, sz)
Definition: shm_toc.h:51
#define shm_toc_estimate_keys(e, cnt)
Definition: shm_toc.h:53
PlanState * requestee
Definition: execnodes.h:640
Definition: execnodes.h:655
ResultRelInfo ** es_result_relations
Definition: execnodes.h:685
struct EPQState * es_epq_active
Definition: execnodes.h:742
TupleTableSlot * ecxt_scantuple
Definition: execnodes.h:273
EstimateDSMForeignScan_function EstimateDSMForeignScan
Definition: fdwapi.h:267
ReScanForeignScan_function ReScanForeignScan
Definition: fdwapi.h:214
RecheckForeignScan_function RecheckForeignScan
Definition: fdwapi.h:249
InitializeDSMForeignScan_function InitializeDSMForeignScan
Definition: fdwapi.h:268
BeginDirectModify_function BeginDirectModify
Definition: fdwapi.h:242
BeginForeignScan_function BeginForeignScan
Definition: fdwapi.h:212
IterateDirectModify_function IterateDirectModify
Definition: fdwapi.h:243
EndForeignScan_function EndForeignScan
Definition: fdwapi.h:215
EndDirectModify_function EndDirectModify
Definition: fdwapi.h:244
ReInitializeDSMForeignScan_function ReInitializeDSMForeignScan
Definition: fdwapi.h:269
IterateForeignScan_function IterateForeignScan
Definition: fdwapi.h:213
InitializeWorkerForeignScan_function InitializeWorkerForeignScan
Definition: fdwapi.h:270
ShutdownForeignScan_function ShutdownForeignScan
Definition: fdwapi.h:271
void * fdw_state
Definition: execnodes.h:2111
struct FdwRoutine * fdwroutine
Definition: execnodes.h:2110
ExprState * fdw_recheck_quals
Definition: execnodes.h:2106
ResultRelInfo * resultRelInfo
Definition: execnodes.h:2108
ScanState ss
Definition: execnodes.h:2105
CmdType operation
Definition: plannodes.h:866
Oid fs_server
Definition: plannodes.h:872
Index resultRelation
Definition: plannodes.h:868
List * fdw_recheck_quals
Definition: plannodes.h:880
List * fdw_scan_tlist
Definition: plannodes.h:878
Scan scan
Definition: plannodes.h:864
shm_toc_estimator estimator
Definition: parallel.h:41
shm_toc * toc
Definition: parallel.h:44
shm_toc * toc
Definition: parallel.h:53
ExprState * qual
Definition: execnodes.h:1180
Plan * plan
Definition: execnodes.h:1159
EState * state
Definition: execnodes.h:1161
bool scanopsset
Definition: execnodes.h:1241
ExprContext * ps_ExprContext
Definition: execnodes.h:1198
bool scanopsfixed
Definition: execnodes.h:1237
bool async_capable
Definition: execnodes.h:1201
ExecProcNodeMtd ExecProcNode
Definition: execnodes.h:1165
Definition: plannodes.h:177
int plan_node_id
Definition: plannodes.h:218
Definition: rel.h:56
Relation ss_currentRelation
Definition: execnodes.h:1616
PlanState ps
Definition: execnodes.h:1615
Index scanrelid
Definition: plannodes.h:516
Oid tts_tableOid
Definition: tuptable.h:129
TupleDesc CreateTupleDescCopy(TupleDesc tupdesc)
Definition: tupdesc.c:252
#define TupIsNull(slot)
Definition: tuptable.h:309

AltStyle によって変換されたページ (->オリジナル) /