1 /*-------------------------------------------------------------------------
2 *
3 * executor.h
4 * support for the POSTGRES executor module
5 *
6 *
7 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
9 *
10 * src/include/executor/executor.h
11 *
12 *-------------------------------------------------------------------------
13 */
14 #ifndef EXECUTOR_H
15 #define EXECUTOR_H
16
17 #include "executor/execdesc.h"
18 #include "executor/execPartition.h"
19 #include "nodes/parsenodes.h"
20 #include "utils/memutils.h"
21
22
23 /*
24 * The "eflags" argument to ExecutorStart and the various ExecInitNode
25 * routines is a bitwise OR of the following flag bits, which tell the
26 * called plan node what to expect. Note that the flags will get modified
27 * as they are passed down the plan tree, since an upper node may require
28 * functionality in its subnode not demanded of the plan as a whole
29 * (example: MergeJoin requires mark/restore capability in its inner input),
30 * or an upper node may shield its input from some functionality requirement
31 * (example: Materialize shields its input from needing to do backward scan).
32 *
33 * EXPLAIN_ONLY indicates that the plan tree is being initialized just so
34 * EXPLAIN can print it out; it will not be run. Hence, no side-effects
35 * of startup should occur. However, error checks (such as permission checks)
36 * should be performed.
37 *
38 * REWIND indicates that the plan node should try to efficiently support
39 * rescans without parameter changes. (Nodes must support ExecReScan calls
40 * in any case, but if this flag was not given, they are at liberty to do it
41 * through complete recalculation. Note that a parameter change forces a
42 * full recalculation in any case.)
43 *
44 * BACKWARD indicates that the plan node must respect the es_direction flag.
45 * When this is not passed, the plan node will only be run forwards.
46 *
47 * MARK indicates that the plan node must support Mark/Restore calls.
48 * When this is not passed, no Mark/Restore will occur.
49 *
50 * SKIP_TRIGGERS tells ExecutorStart/ExecutorFinish to skip calling
51 * AfterTriggerBeginQuery/AfterTriggerEndQuery. This does not necessarily
52 * mean that the plan can't queue any AFTER triggers; just that the caller
53 * is responsible for there being a trigger context for them to be queued in.
54 *
55 * WITH/WITHOUT_OIDS tell the executor to emit tuples with or without space
56 * for OIDs, respectively. These are currently used only for CREATE TABLE AS.
57 * If neither is set, the plan may or may not produce tuples including OIDs.
58 */
59 #define EXEC_FLAG_EXPLAIN_ONLY 0x0001 /* EXPLAIN, no ANALYZE */
60 #define EXEC_FLAG_REWIND 0x0002 /* need efficient rescan */
61 #define EXEC_FLAG_BACKWARD 0x0004 /* need backward scan */
62 #define EXEC_FLAG_MARK 0x0008 /* need mark/restore */
63 #define EXEC_FLAG_SKIP_TRIGGERS 0x0010 /* skip AfterTrigger calls */
64 #define EXEC_FLAG_WITH_OIDS 0x0020 /* force OIDs in returned tuples */
65 #define EXEC_FLAG_WITHOUT_OIDS 0x0040 /* force no OIDs in returned tuples */
66 #define EXEC_FLAG_WITH_NO_DATA 0x0080 /* rel scannability doesn't matter */
67
68
69 /* Hook for plugins to get control in ExecutorStart() */
70 typedef void (*ExecutorStart_hook_type) (QueryDesc *queryDesc, int eflags);
71 extern PGDLLIMPORT ExecutorStart_hook_type ExecutorStart_hook;
72
73 /* Hook for plugins to get control in ExecutorRun() */
74 typedef void (*ExecutorRun_hook_type) (QueryDesc *queryDesc,
75 ScanDirection direction,
76 uint64 count,
77 bool execute_once);
78 extern PGDLLIMPORT ExecutorRun_hook_type ExecutorRun_hook;
79
80 /* Hook for plugins to get control in ExecutorFinish() */
81 typedef void (*ExecutorFinish_hook_type) (QueryDesc *queryDesc);
82 extern PGDLLIMPORT ExecutorFinish_hook_type ExecutorFinish_hook;
83
84 /* Hook for plugins to get control in ExecutorEnd() */
85 typedef void (*ExecutorEnd_hook_type) (QueryDesc *queryDesc);
86 extern PGDLLIMPORT ExecutorEnd_hook_type ExecutorEnd_hook;
87
88 /* Hook for plugins to get control in ExecCheckRTPerms() */
89 typedef bool (*ExecutorCheckPerms_hook_type) (List *, bool);
90 extern PGDLLIMPORT ExecutorCheckPerms_hook_type ExecutorCheckPerms_hook;
91
92
93 /*
94 * prototypes from functions in execAmi.c
95 */
96 struct Path; /* avoid including relation.h here */
97
98 extern void ExecReScan(PlanState *node);
99 extern void ExecMarkPos(PlanState *node);
100 extern void ExecRestrPos(PlanState *node);
101 extern bool ExecSupportsMarkRestore(struct Path *pathnode);
102 extern bool ExecSupportsBackwardScan(Plan *node);
103 extern bool ExecMaterializesOutput(NodeTag plantype);
104
105 /*
106 * prototypes from functions in execCurrent.c
107 */
108 extern bool execCurrentOf(CurrentOfExpr *cexpr,
109 ExprContext *econtext,
110 Oid table_oid,
111 ItemPointer current_tid);
112
113 /*
114 * prototypes from functions in execGrouping.c
115 */
116 extern ExprState *execTuplesMatchPrepare(TupleDesc desc,
117 int numCols,
118 AttrNumber *keyColIdx,
119 Oid *eqOperators,
120 PlanState *parent);
121 extern void execTuplesHashPrepare(int numCols,
122 Oid *eqOperators,
123 Oid **eqFuncOids,
124 FmgrInfo **hashFunctions);
125 extern TupleHashTable BuildTupleHashTable(PlanState *parent,
126 TupleDesc inputDesc,
127 int numCols, AttrNumber *keyColIdx,
128 Oid *eqfuncoids,
129 FmgrInfo *hashfunctions,
130 long nbuckets, Size additionalsize,
131 MemoryContext tablecxt,
132 MemoryContext tempcxt, bool use_variable_hash_iv);
133 extern TupleHashTable BuildTupleHashTableExt(PlanState *parent,
134 TupleDesc inputDesc,
135 int numCols, AttrNumber *keyColIdx,
136 Oid *eqfuncoids,
137 FmgrInfo *hashfunctions,
138 long nbuckets, Size additionalsize,
139 MemoryContext metacxt,
140 MemoryContext tablecxt,
141 MemoryContext tempcxt, bool use_variable_hash_iv);
142 extern TupleHashEntry LookupTupleHashEntry(TupleHashTable hashtable,
143 TupleTableSlot *slot,
144 bool *isnew);
145 extern TupleHashEntry FindTupleHashEntry(TupleHashTable hashtable,
146 TupleTableSlot *slot,
147 ExprState *eqcomp,
148 FmgrInfo *hashfunctions);
149 extern void ResetTupleHashTable(TupleHashTable hashtable);
150
151 /*
152 * prototypes from functions in execJunk.c
153 */
154 extern JunkFilter *ExecInitJunkFilter(List *targetList, bool hasoid,
155 TupleTableSlot *slot);
156 extern JunkFilter *ExecInitJunkFilterConversion(List *targetList,
157 TupleDesc cleanTupType,
158 TupleTableSlot *slot);
159 extern AttrNumber ExecFindJunkAttribute(JunkFilter *junkfilter,
160 const char *attrName);
161 extern AttrNumber ExecFindJunkAttributeInTlist(List *targetlist,
162 const char *attrName);
163 extern Datum ExecGetJunkAttribute(TupleTableSlot *slot, AttrNumber attno,
164 bool *isNull);
165 extern TupleTableSlot *ExecFilterJunk(JunkFilter *junkfilter,
166 TupleTableSlot *slot);
167
168
169 /*
170 * prototypes from functions in execMain.c
171 */
172 extern void ExecutorStart(QueryDesc *queryDesc, int eflags);
173 extern void standard_ExecutorStart(QueryDesc *queryDesc, int eflags);
174 extern void ExecutorRun(QueryDesc *queryDesc,
175 ScanDirection direction, uint64 count, bool execute_once);
176 extern void standard_ExecutorRun(QueryDesc *queryDesc,
177 ScanDirection direction, uint64 count, bool execute_once);
178 extern void ExecutorFinish(QueryDesc *queryDesc);
179 extern void standard_ExecutorFinish(QueryDesc *queryDesc);
180 extern void ExecutorEnd(QueryDesc *queryDesc);
181 extern void standard_ExecutorEnd(QueryDesc *queryDesc);
182 extern void ExecutorRewind(QueryDesc *queryDesc);
183 extern bool ExecCheckRTPerms(List *rangeTable, bool ereport_on_violation);
184 extern void CheckValidResultRel(ResultRelInfo *resultRelInfo, CmdType operation);
185 extern void InitResultRelInfo(ResultRelInfo *resultRelInfo,
186 Relation resultRelationDesc,
187 Index resultRelationIndex,
188 ResultRelInfo *partition_root_rri,
189 int instrument_options);
190 extern ResultRelInfo *ExecGetTriggerResultRel(EState *estate, Oid relid);
191 extern void ExecCleanUpTriggerState(EState *estate);
192 extern bool ExecContextForcesOids(PlanState *planstate, bool *hasoids);
193 extern void ExecConstraints(ResultRelInfo *resultRelInfo,
194 TupleTableSlot *slot, EState *estate);
195 extern bool ExecPartitionCheck(ResultRelInfo *resultRelInfo,
196 TupleTableSlot *slot, EState *estate, bool emitError);
197 extern void ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
198 TupleTableSlot *slot, EState *estate);
199 extern void ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
200 TupleTableSlot *slot, EState *estate);
201 extern LockTupleMode ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo);
202 extern ExecRowMark *ExecFindRowMark(EState *estate, Index rti, bool missing_ok);
203 extern ExecAuxRowMark *ExecBuildAuxRowMark(ExecRowMark *erm, List *targetlist);
204 extern TupleTableSlot *EvalPlanQual(EState *estate, EPQState *epqstate,
205 Relation relation, Index rti, int lockmode,
206 ItemPointer tid, TransactionId priorXmax);
207 extern HeapTuple EvalPlanQualFetch(EState *estate, Relation relation,
208 int lockmode, LockWaitPolicy wait_policy, ItemPointer tid,
209 TransactionId priorXmax);
210 extern void EvalPlanQualInit(EPQState *epqstate, EState *estate,
211 Plan *subplan, List *auxrowmarks, int epqParam);
212 extern void EvalPlanQualSetPlan(EPQState *epqstate,
213 Plan *subplan, List *auxrowmarks);
214 extern void EvalPlanQualSetTuple(EPQState *epqstate, Index rti,
215 HeapTuple tuple);
216 extern HeapTuple EvalPlanQualGetTuple(EPQState *epqstate, Index rti);
217
218 #define EvalPlanQualSetSlot(epqstate, slot) ((epqstate)->origslot = (slot))
219 extern void EvalPlanQualFetchRowMarks(EPQState *epqstate);
220 extern TupleTableSlot *EvalPlanQualNext(EPQState *epqstate);
221 extern void EvalPlanQualBegin(EPQState *epqstate, EState *parentestate);
222 extern void EvalPlanQualEnd(EPQState *epqstate);
223
224 /*
225 * functions in execProcnode.c
226 */
227 extern PlanState *ExecInitNode(Plan *node, EState *estate, int eflags);
228 extern void ExecSetExecProcNode(PlanState *node, ExecProcNodeMtd function);
229 extern Node *MultiExecProcNode(PlanState *node);
230 extern void ExecEndNode(PlanState *node);
231 extern bool ExecShutdownNode(PlanState *node);
232 extern void ExecSetTupleBound(int64 tuples_needed, PlanState *child_node);
233
234
235 /* ----------------------------------------------------------------
236 * ExecProcNode
237 *
238 * Execute the given node to return a(nother) tuple.
239 * ----------------------------------------------------------------
240 */
241 #ifndef FRONTEND
242 static inline TupleTableSlot *
ExecProcNode(PlanState * node)243 ExecProcNode(PlanState *node)
244 {
245 if (node->chgParam != NULL) /* something changed? */
246 ExecReScan(node); /* let ReScan handle this */
247
248 return node->ExecProcNode(node);
249 }
250 #endif
251
252 /*
253 * prototypes from functions in execExpr.c
254 */
255 extern ExprState *ExecInitExpr(Expr *node, PlanState *parent);
256 extern ExprState *ExecInitExprWithParams(Expr *node, ParamListInfo ext_params);
257 extern ExprState *ExecInitQual(List *qual, PlanState *parent);
258 extern ExprState *ExecInitCheck(List *qual, PlanState *parent);
259 extern List *ExecInitExprList(List *nodes, PlanState *parent);
260 extern ExprState *ExecBuildAggTrans(AggState *aggstate, struct AggStatePerPhaseData *phase,
261 bool doSort, bool doHash);
262 extern ExprState *ExecBuildGroupingEqual(TupleDesc ldesc, TupleDesc rdesc,
263 int numCols,
264 AttrNumber *keyColIdx,
265 Oid *eqfunctions,
266 PlanState *parent);
267 extern ProjectionInfo *ExecBuildProjectionInfo(List *targetList,
268 ExprContext *econtext,
269 TupleTableSlot *slot,
270 PlanState *parent,
271 TupleDesc inputDesc);
272 extern ProjectionInfo *ExecBuildProjectionInfoExt(List *targetList,
273 ExprContext *econtext,
274 TupleTableSlot *slot,
275 bool assignJunkEntries,
276 PlanState *parent,
277 TupleDesc inputDesc);
278 extern ExprState *ExecPrepareExpr(Expr *node, EState *estate);
279 extern ExprState *ExecPrepareQual(List *qual, EState *estate);
280 extern ExprState *ExecPrepareCheck(List *qual, EState *estate);
281 extern List *ExecPrepareExprList(List *nodes, EState *estate);
282
283 /*
284 * ExecEvalExpr
285 *
286 * Evaluate expression identified by "state" in the execution context
287 * given by "econtext". *isNull is set to the is-null flag for the result,
288 * and the Datum value is the function result.
289 *
290 * The caller should already have switched into the temporary memory
291 * context econtext->ecxt_per_tuple_memory. The convenience entry point
292 * ExecEvalExprSwitchContext() is provided for callers who don't prefer to
293 * do the switch in an outer loop.
294 */
295 #ifndef FRONTEND
296 static inline Datum
ExecEvalExpr(ExprState * state,ExprContext * econtext,bool * isNull)297 ExecEvalExpr(ExprState *state,
298 ExprContext *econtext,
299 bool *isNull)
300 {
301 return state->evalfunc(state, econtext, isNull);
302 }
303 #endif
304
305 /*
306 * ExecEvalExprSwitchContext
307 *
308 * Same as ExecEvalExpr, but get into the right allocation context explicitly.
309 */
310 #ifndef FRONTEND
311 static inline Datum
ExecEvalExprSwitchContext(ExprState * state,ExprContext * econtext,bool * isNull)312 ExecEvalExprSwitchContext(ExprState *state,
313 ExprContext *econtext,
314 bool *isNull)
315 {
316 Datum retDatum;
317 MemoryContext oldContext;
318
319 oldContext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory);
320 retDatum = state->evalfunc(state, econtext, isNull);
321 MemoryContextSwitchTo(oldContext);
322 return retDatum;
323 }
324 #endif
325
326 /*
327 * ExecProject
328 *
329 * Projects a tuple based on projection info and stores it in the slot passed
330 * to ExecBuildProjectInfo().
331 *
332 * Note: the result is always a virtual tuple; therefore it may reference
333 * the contents of the exprContext's scan tuples and/or temporary results
334 * constructed in the exprContext. If the caller wishes the result to be
335 * valid longer than that data will be valid, he must call ExecMaterializeSlot
336 * on the result slot.
337 */
338 #ifndef FRONTEND
339 static inline TupleTableSlot *
ExecProject(ProjectionInfo * projInfo)340 ExecProject(ProjectionInfo *projInfo)
341 {
342 ExprContext *econtext = projInfo->pi_exprContext;
343 ExprState *state = &projInfo->pi_state;
344 TupleTableSlot *slot = state->resultslot;
345 bool isnull;
346
347 /*
348 * Clear any former contents of the result slot. This makes it safe for
349 * us to use the slot's Datum/isnull arrays as workspace.
350 */
351 ExecClearTuple(slot);
352
353 /* Run the expression, discarding scalar result from the last column. */
354 (void) ExecEvalExprSwitchContext(state, econtext, &isnull);
355
356 /*
357 * Successfully formed a result row. Mark the result slot as containing a
358 * valid virtual tuple (inlined version of ExecStoreVirtualTuple()).
359 */
360 slot->tts_isempty = false;
361 slot->tts_nvalid = slot->tts_tupleDescriptor->natts;
362
363 return slot;
364 }
365 #endif
366
367 /*
368 * ExecQual - evaluate a qual prepared with ExecInitQual (possibly via
369 * ExecPrepareQual). Returns true if qual is satisfied, else false.
370 *
371 * Note: ExecQual used to have a third argument "resultForNull". The
372 * behavior of this function now corresponds to resultForNull == false.
373 * If you want the resultForNull == true behavior, see ExecCheck.
374 */
375 #ifndef FRONTEND
376 static inline bool
ExecQual(ExprState * state,ExprContext * econtext)377 ExecQual(ExprState *state, ExprContext *econtext)
378 {
379 Datum ret;
380 bool isnull;
381
382 /* short-circuit (here and in ExecInitQual) for empty restriction list */
383 if (state == NULL)
384 return true;
385
386 /* verify that expression was compiled using ExecInitQual */
387 Assert(state->flags & EEO_FLAG_IS_QUAL);
388
389 ret = ExecEvalExprSwitchContext(state, econtext, &isnull);
390
391 /* EEOP_QUAL should never return NULL */
392 Assert(!isnull);
393
394 return DatumGetBool(ret);
395 }
396 #endif
397
398 /*
399 * ExecQualAndReset() - evaluate qual with ExecQual() and reset expression
400 * context.
401 */
402 #ifndef FRONTEND
403 static inline bool
ExecQualAndReset(ExprState * state,ExprContext * econtext)404 ExecQualAndReset(ExprState *state, ExprContext *econtext)
405 {
406 bool ret = ExecQual(state, econtext);
407
408 /* inline ResetExprContext, to avoid ordering issue in this file */
409 MemoryContextReset(econtext->ecxt_per_tuple_memory);
410 return ret;
411 }
412 #endif
413
414 extern bool ExecCheck(ExprState *state, ExprContext *context);
415
416 /*
417 * prototypes from functions in execSRF.c
418 */
419 extern SetExprState *ExecInitTableFunctionResult(Expr *expr,
420 ExprContext *econtext, PlanState *parent);
421 extern Tuplestorestate *ExecMakeTableFunctionResult(SetExprState *setexpr,
422 ExprContext *econtext,
423 MemoryContext argContext,
424 TupleDesc expectedDesc,
425 bool randomAccess);
426 extern SetExprState *ExecInitFunctionResultSet(Expr *expr,
427 ExprContext *econtext, PlanState *parent);
428 extern Datum ExecMakeFunctionResultSet(SetExprState *fcache,
429 ExprContext *econtext,
430 MemoryContext argContext,
431 bool *isNull,
432 ExprDoneCond *isDone);
433
434 /*
435 * prototypes from functions in execScan.c
436 */
437 typedef TupleTableSlot *(*ExecScanAccessMtd) (ScanState *node);
438 typedef bool (*ExecScanRecheckMtd) (ScanState *node, TupleTableSlot *slot);
439
440 extern TupleTableSlot *ExecScan(ScanState *node, ExecScanAccessMtd accessMtd,
441 ExecScanRecheckMtd recheckMtd);
442 extern void ExecAssignScanProjectionInfo(ScanState *node);
443 extern void ExecAssignScanProjectionInfoWithVarno(ScanState *node, Index varno);
444 extern void ExecScanReScan(ScanState *node);
445
446 /*
447 * prototypes from functions in execTuples.c
448 */
449 extern void ExecInitResultTupleSlotTL(EState *estate, PlanState *planstate);
450 extern void ExecInitScanTupleSlot(EState *estate, ScanState *scanstate, TupleDesc tupleDesc);
451 extern TupleTableSlot *ExecInitExtraTupleSlot(EState *estate,
452 TupleDesc tupleDesc);
453 extern TupleTableSlot *ExecInitNullTupleSlot(EState *estate,
454 TupleDesc tupType);
455 extern TupleDesc ExecTypeFromTL(List *targetList, bool hasoid);
456 extern TupleDesc ExecCleanTypeFromTL(List *targetList, bool hasoid);
457 extern TupleDesc ExecTypeFromExprList(List *exprList);
458 extern void ExecTypeSetColNames(TupleDesc typeInfo, List *namesList);
459 extern void UpdateChangedParamSet(PlanState *node, Bitmapset *newchg);
460
461 typedef struct TupOutputState
462 {
463 TupleTableSlot *slot;
464 DestReceiver *dest;
465 } TupOutputState;
466
467 extern TupOutputState *begin_tup_output_tupdesc(DestReceiver *dest,
468 TupleDesc tupdesc);
469 extern void do_tup_output(TupOutputState *tstate, Datum *values, bool *isnull);
470 extern void do_text_output_multiline(TupOutputState *tstate, const char *txt);
471 extern void end_tup_output(TupOutputState *tstate);
472
473 /*
474 * Write a single line of text given as a C string.
475 *
476 * Should only be used with a single-TEXT-attribute tupdesc.
477 */
478 #define do_text_output_oneline(tstate, str_to_emit) \
479 do { \
480 Datum values_[1]; \
481 bool isnull_[1]; \
482 values_[0] = PointerGetDatum(cstring_to_text(str_to_emit)); \
483 isnull_[0] = false; \
484 do_tup_output(tstate, values_, isnull_); \
485 pfree(DatumGetPointer(values_[0])); \
486 } while (0)
487
488
489 /*
490 * prototypes from functions in execUtils.c
491 */
492 extern EState *CreateExecutorState(void);
493 extern void FreeExecutorState(EState *estate);
494 extern ExprContext *CreateExprContext(EState *estate);
495 extern ExprContext *CreateStandaloneExprContext(void);
496 extern void FreeExprContext(ExprContext *econtext, bool isCommit);
497 extern void ReScanExprContext(ExprContext *econtext);
498
499 #define ResetExprContext(econtext) \
500 MemoryContextReset((econtext)->ecxt_per_tuple_memory)
501
502 extern ExprContext *MakePerTupleExprContext(EState *estate);
503
504 /* Get an EState's per-output-tuple exprcontext, making it if first use */
505 #define GetPerTupleExprContext(estate) \
506 ((estate)->es_per_tuple_exprcontext ? \
507 (estate)->es_per_tuple_exprcontext : \
508 MakePerTupleExprContext(estate))
509
510 #define GetPerTupleMemoryContext(estate) \
511 (GetPerTupleExprContext(estate)->ecxt_per_tuple_memory)
512
513 /* Reset an EState's per-output-tuple exprcontext, if one's been created */
514 #define ResetPerTupleExprContext(estate) \
515 do { \
516 if ((estate)->es_per_tuple_exprcontext) \
517 ResetExprContext((estate)->es_per_tuple_exprcontext); \
518 } while (0)
519
520 extern void ExecAssignExprContext(EState *estate, PlanState *planstate);
521 extern TupleDesc ExecGetResultType(PlanState *planstate);
522 extern void ExecAssignProjectionInfo(PlanState *planstate,
523 TupleDesc inputDesc);
524 extern void ExecConditionalAssignProjectionInfo(PlanState *planstate,
525 TupleDesc inputDesc, Index varno);
526 extern void ExecFreeExprContext(PlanState *planstate);
527 extern void ExecAssignScanType(ScanState *scanstate, TupleDesc tupDesc);
528 extern void ExecCreateScanSlotFromOuterPlan(EState *estate, ScanState *scanstate);
529
530 extern bool ExecRelationIsTargetRelation(EState *estate, Index scanrelid);
531
532 extern Relation ExecOpenScanRelation(EState *estate, Index scanrelid, int eflags);
533 extern void ExecCloseScanRelation(Relation scanrel);
534
535 extern int executor_errposition(EState *estate, int location);
536
537 extern void RegisterExprContextCallback(ExprContext *econtext,
538 ExprContextCallbackFunction function,
539 Datum arg);
540 extern void UnregisterExprContextCallback(ExprContext *econtext,
541 ExprContextCallbackFunction function,
542 Datum arg);
543
544 extern void ExecLockNonLeafAppendTables(List *partitioned_rels, EState *estate);
545
546 extern Datum GetAttributeByName(HeapTupleHeader tuple, const char *attname,
547 bool *isNull);
548 extern Datum GetAttributeByNum(HeapTupleHeader tuple, AttrNumber attrno,
549 bool *isNull);
550
551 extern int ExecTargetListLength(List *targetlist);
552 extern int ExecCleanTargetListLength(List *targetlist);
553
554 extern Bitmapset *ExecGetInsertedCols(ResultRelInfo *relinfo, EState *estate);
555 extern Bitmapset *ExecGetUpdatedCols(ResultRelInfo *relinfo, EState *estate);
556
557 /*
558 * prototypes from functions in execIndexing.c
559 */
560 extern void ExecOpenIndices(ResultRelInfo *resultRelInfo, bool speculative);
561 extern void ExecCloseIndices(ResultRelInfo *resultRelInfo);
562 extern List *ExecInsertIndexTuples(TupleTableSlot *slot, ItemPointer tupleid,
563 EState *estate, bool noDupErr, bool *specConflict,
564 List *arbiterIndexes);
565 extern bool ExecCheckIndexConstraints(TupleTableSlot *slot, EState *estate,
566 ItemPointer conflictTid, List *arbiterIndexes);
567 extern void check_exclusion_constraint(Relation heap, Relation index,
568 IndexInfo *indexInfo,
569 ItemPointer tupleid,
570 Datum *values, bool *isnull,
571 EState *estate, bool newIndex);
572
573 /*
574 * prototypes from functions in execReplication.c
575 */
576 extern bool RelationFindReplTupleByIndex(Relation rel, Oid idxoid,
577 LockTupleMode lockmode,
578 TupleTableSlot *searchslot,
579 TupleTableSlot *outslot);
580 extern bool RelationFindReplTupleSeq(Relation rel, LockTupleMode lockmode,
581 TupleTableSlot *searchslot, TupleTableSlot *outslot);
582
583 extern void ExecSimpleRelationInsert(EState *estate, TupleTableSlot *slot);
584 extern void ExecSimpleRelationUpdate(EState *estate, EPQState *epqstate,
585 TupleTableSlot *searchslot, TupleTableSlot *slot);
586 extern void ExecSimpleRelationDelete(EState *estate, EPQState *epqstate,
587 TupleTableSlot *searchslot);
588 extern void CheckCmdReplicaIdentity(Relation rel, CmdType cmd);
589
590 extern void CheckSubscriptionRelkind(char relkind, const char *nspname,
591 const char *relname);
592
593 #endif /* EXECUTOR_H */
594