Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * executor.h
4 : * support for the POSTGRES executor module
5 : *
6 : *
7 : * Portions Copyright (c) 1996-2026, 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 "datatype/timestamp.h"
18 : #include "executor/execdesc.h"
19 : #include "fmgr.h"
20 : #include "nodes/lockoptions.h"
21 : #include "nodes/parsenodes.h"
22 : #include "utils/memutils.h"
23 :
24 :
25 : /*
26 : * The "eflags" argument to ExecutorStart and the various ExecInitNode
27 : * routines is a bitwise OR of the following flag bits, which tell the
28 : * called plan node what to expect. Note that the flags will get modified
29 : * as they are passed down the plan tree, since an upper node may require
30 : * functionality in its subnode not demanded of the plan as a whole
31 : * (example: MergeJoin requires mark/restore capability in its inner input),
32 : * or an upper node may shield its input from some functionality requirement
33 : * (example: Materialize shields its input from needing to do backward scan).
34 : *
35 : * EXPLAIN_ONLY indicates that the plan tree is being initialized just so
36 : * EXPLAIN can print it out; it will not be run. Hence, no side-effects
37 : * of startup should occur. However, error checks (such as permission checks)
38 : * should be performed.
39 : *
40 : * EXPLAIN_GENERIC can only be used together with EXPLAIN_ONLY. It indicates
41 : * that a generic plan is being shown using EXPLAIN (GENERIC_PLAN), which
42 : * means that missing parameter values must be tolerated. Currently, the only
43 : * effect is to suppress execution-time partition pruning.
44 : *
45 : * REWIND indicates that the plan node should try to efficiently support
46 : * rescans without parameter changes. (Nodes must support ExecReScan calls
47 : * in any case, but if this flag was not given, they are at liberty to do it
48 : * through complete recalculation. Note that a parameter change forces a
49 : * full recalculation in any case.)
50 : *
51 : * BACKWARD indicates that the plan node must respect the es_direction flag.
52 : * When this is not passed, the plan node will only be run forwards.
53 : *
54 : * MARK indicates that the plan node must support Mark/Restore calls.
55 : * When this is not passed, no Mark/Restore will occur.
56 : *
57 : * SKIP_TRIGGERS tells ExecutorStart/ExecutorFinish to skip calling
58 : * AfterTriggerBeginQuery/AfterTriggerEndQuery. This does not necessarily
59 : * mean that the plan can't queue any AFTER triggers; just that the caller
60 : * is responsible for there being a trigger context for them to be queued in.
61 : *
62 : * WITH_NO_DATA indicates that we are performing REFRESH MATERIALIZED VIEW
63 : * ... WITH NO DATA. Currently, the only effect is to suppress errors about
64 : * scanning unpopulated materialized views.
65 : */
66 : #define EXEC_FLAG_EXPLAIN_ONLY 0x0001 /* EXPLAIN, no ANALYZE */
67 : #define EXEC_FLAG_EXPLAIN_GENERIC 0x0002 /* EXPLAIN (GENERIC_PLAN) */
68 : #define EXEC_FLAG_REWIND 0x0004 /* need efficient rescan */
69 : #define EXEC_FLAG_BACKWARD 0x0008 /* need backward scan */
70 : #define EXEC_FLAG_MARK 0x0010 /* need mark/restore */
71 : #define EXEC_FLAG_SKIP_TRIGGERS 0x0020 /* skip AfterTrigger setup */
72 : #define EXEC_FLAG_WITH_NO_DATA 0x0040 /* REFRESH ... WITH NO DATA */
73 :
74 :
75 : /* Hook for plugins to get control in ExecutorStart() */
76 : typedef void (*ExecutorStart_hook_type) (QueryDesc *queryDesc, int eflags);
77 : extern PGDLLIMPORT ExecutorStart_hook_type ExecutorStart_hook;
78 :
79 : /* Hook for plugins to get control in ExecutorRun() */
80 : typedef void (*ExecutorRun_hook_type) (QueryDesc *queryDesc,
81 : ScanDirection direction,
82 : uint64 count);
83 : extern PGDLLIMPORT ExecutorRun_hook_type ExecutorRun_hook;
84 :
85 : /* Hook for plugins to get control in ExecutorFinish() */
86 : typedef void (*ExecutorFinish_hook_type) (QueryDesc *queryDesc);
87 : extern PGDLLIMPORT ExecutorFinish_hook_type ExecutorFinish_hook;
88 :
89 : /* Hook for plugins to get control in ExecutorEnd() */
90 : typedef void (*ExecutorEnd_hook_type) (QueryDesc *queryDesc);
91 : extern PGDLLIMPORT ExecutorEnd_hook_type ExecutorEnd_hook;
92 :
93 : /* Hook for plugins to get control in ExecCheckPermissions() */
94 : typedef bool (*ExecutorCheckPerms_hook_type) (List *rangeTable,
95 : List *rtePermInfos,
96 : bool ereport_on_violation);
97 : extern PGDLLIMPORT ExecutorCheckPerms_hook_type ExecutorCheckPerms_hook;
98 :
99 :
100 : /*
101 : * prototypes from functions in execAmi.c
102 : */
103 : typedef struct Path Path; /* avoid including pathnodes.h here */
104 :
105 : extern void ExecReScan(PlanState *node);
106 : extern void ExecMarkPos(PlanState *node);
107 : extern void ExecRestrPos(PlanState *node);
108 : extern bool ExecSupportsMarkRestore(Path *pathnode);
109 : extern bool ExecSupportsBackwardScan(Plan *node);
110 : extern bool ExecMaterializesOutput(NodeTag plantype);
111 :
112 : /*
113 : * prototypes from functions in execCurrent.c
114 : */
115 : extern bool execCurrentOf(CurrentOfExpr *cexpr,
116 : ExprContext *econtext,
117 : Oid table_oid,
118 : ItemPointer current_tid);
119 :
120 : /*
121 : * prototypes from functions in execGrouping.c
122 : */
123 : extern ExprState *execTuplesMatchPrepare(TupleDesc desc,
124 : int numCols,
125 : const AttrNumber *keyColIdx,
126 : const Oid *eqOperators,
127 : const Oid *collations,
128 : PlanState *parent);
129 : extern void execTuplesHashPrepare(int numCols,
130 : const Oid *eqOperators,
131 : Oid **eqFuncOids,
132 : FmgrInfo **hashFunctions);
133 : extern TupleHashTable BuildTupleHashTable(PlanState *parent,
134 : TupleDesc inputDesc,
135 : const TupleTableSlotOps *inputOps,
136 : int numCols,
137 : AttrNumber *keyColIdx,
138 : const Oid *eqfuncoids,
139 : FmgrInfo *hashfunctions,
140 : Oid *collations,
141 : double nelements,
142 : Size additionalsize,
143 : MemoryContext metacxt,
144 : MemoryContext tuplescxt,
145 : MemoryContext tempcxt,
146 : bool use_variable_hash_iv);
147 : extern TupleHashEntry LookupTupleHashEntry(TupleHashTable hashtable,
148 : TupleTableSlot *slot,
149 : bool *isnew, uint32 *hash);
150 : extern uint32 TupleHashTableHash(TupleHashTable hashtable,
151 : TupleTableSlot *slot);
152 : extern TupleHashEntry LookupTupleHashEntryHash(TupleHashTable hashtable,
153 : TupleTableSlot *slot,
154 : bool *isnew, uint32 hash);
155 : extern TupleHashEntry FindTupleHashEntry(TupleHashTable hashtable,
156 : TupleTableSlot *slot,
157 : ExprState *eqcomp,
158 : ExprState *hashexpr);
159 : extern void ResetTupleHashTable(TupleHashTable hashtable);
160 : extern Size EstimateTupleHashTableSpace(double nentries,
161 : Size tupleWidth,
162 : Size additionalsize);
163 :
164 : #ifndef FRONTEND
165 : /*
166 : * Return size of the hash bucket. Useful for estimating memory usage.
167 : */
168 : static inline size_t
169 43398 : TupleHashEntrySize(void)
170 : {
171 43398 : return sizeof(TupleHashEntryData);
172 : }
173 :
174 : /*
175 : * Return tuple from hash entry.
176 : */
177 : static inline MinimalTuple
178 281700 : TupleHashEntryGetTuple(TupleHashEntry entry)
179 : {
180 281700 : return entry->firstTuple;
181 : }
182 :
183 : /*
184 : * Get a pointer into the additional space allocated for this entry. The
185 : * memory will be maxaligned and zeroed.
186 : *
187 : * The amount of space available is the additionalsize requested in the call
188 : * to BuildTupleHashTable(). If additionalsize was specified as zero, return
189 : * NULL.
190 : */
191 : static inline void *
192 4631041 : TupleHashEntryGetAdditional(TupleHashTable hashtable, TupleHashEntry entry)
193 : {
194 4631041 : if (hashtable->additionalsize > 0)
195 3709214 : return (char *) entry->firstTuple - hashtable->additionalsize;
196 : else
197 921827 : return NULL;
198 : }
199 : #endif
200 :
201 : /*
202 : * prototypes from functions in execJunk.c
203 : */
204 : extern JunkFilter *ExecInitJunkFilter(List *targetList,
205 : TupleTableSlot *slot);
206 : extern JunkFilter *ExecInitJunkFilterConversion(List *targetList,
207 : TupleDesc cleanTupType,
208 : TupleTableSlot *slot);
209 : extern AttrNumber ExecFindJunkAttribute(JunkFilter *junkfilter,
210 : const char *attrName);
211 : extern AttrNumber ExecFindJunkAttributeInTlist(List *targetlist,
212 : const char *attrName);
213 : extern TupleTableSlot *ExecFilterJunk(JunkFilter *junkfilter,
214 : TupleTableSlot *slot);
215 :
216 : /*
217 : * ExecGetJunkAttribute
218 : *
219 : * Given a junk filter's input tuple (slot) and a junk attribute's number
220 : * previously found by ExecFindJunkAttribute, extract & return the value and
221 : * isNull flag of the attribute.
222 : */
223 : #ifndef FRONTEND
224 : static inline Datum
225 1077484 : ExecGetJunkAttribute(TupleTableSlot *slot, AttrNumber attno, bool *isNull)
226 : {
227 : Assert(attno > 0);
228 1077484 : return slot_getattr(slot, attno, isNull);
229 : }
230 : #endif
231 :
232 : /*
233 : * prototypes from functions in execMain.c
234 : */
235 : extern void ExecutorStart(QueryDesc *queryDesc, int eflags);
236 : extern void standard_ExecutorStart(QueryDesc *queryDesc, int eflags);
237 : extern void ExecutorRun(QueryDesc *queryDesc,
238 : ScanDirection direction, uint64 count);
239 : extern void standard_ExecutorRun(QueryDesc *queryDesc,
240 : ScanDirection direction, uint64 count);
241 : extern void ExecutorFinish(QueryDesc *queryDesc);
242 : extern void standard_ExecutorFinish(QueryDesc *queryDesc);
243 : extern void ExecutorEnd(QueryDesc *queryDesc);
244 : extern void standard_ExecutorEnd(QueryDesc *queryDesc);
245 : extern void ExecutorRewind(QueryDesc *queryDesc);
246 : extern bool ExecCheckPermissions(List *rangeTable,
247 : List *rteperminfos, bool ereport_on_violation);
248 : extern bool ExecCheckOneRelPerms(RTEPermissionInfo *perminfo);
249 : extern void CheckValidResultRel(ResultRelInfo *resultRelInfo, CmdType operation,
250 : OnConflictAction onConflictAction,
251 : List *mergeActions);
252 : extern void InitResultRelInfo(ResultRelInfo *resultRelInfo,
253 : Relation resultRelationDesc,
254 : Index resultRelationIndex,
255 : ResultRelInfo *partition_root_rri,
256 : int instrument_options);
257 : extern ResultRelInfo *ExecGetTriggerResultRel(EState *estate, Oid relid,
258 : ResultRelInfo *rootRelInfo);
259 : extern List *ExecGetAncestorResultRels(EState *estate, ResultRelInfo *resultRelInfo);
260 : extern void ExecConstraints(ResultRelInfo *resultRelInfo,
261 : TupleTableSlot *slot, EState *estate);
262 : extern AttrNumber ExecRelGenVirtualNotNull(ResultRelInfo *resultRelInfo,
263 : TupleTableSlot *slot,
264 : EState *estate,
265 : List *notnull_virtual_attrs);
266 : extern bool ExecPartitionCheck(ResultRelInfo *resultRelInfo,
267 : TupleTableSlot *slot, EState *estate, bool emitError);
268 : extern void ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
269 : TupleTableSlot *slot, EState *estate);
270 : extern void ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
271 : TupleTableSlot *slot, EState *estate);
272 : extern char *ExecBuildSlotValueDescription(Oid reloid, TupleTableSlot *slot,
273 : TupleDesc tupdesc,
274 : Bitmapset *modifiedCols,
275 : int maxfieldlen);
276 : extern LockTupleMode ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo);
277 : extern ExecRowMark *ExecFindRowMark(EState *estate, Index rti, bool missing_ok);
278 : extern ExecAuxRowMark *ExecBuildAuxRowMark(ExecRowMark *erm, List *targetlist);
279 : extern TupleTableSlot *EvalPlanQual(EPQState *epqstate, Relation relation,
280 : Index rti, TupleTableSlot *inputslot);
281 : extern void EvalPlanQualInit(EPQState *epqstate, EState *parentestate,
282 : Plan *subplan, List *auxrowmarks,
283 : int epqParam, List *resultRelations);
284 : extern void EvalPlanQualSetPlan(EPQState *epqstate,
285 : Plan *subplan, List *auxrowmarks);
286 : extern TupleTableSlot *EvalPlanQualSlot(EPQState *epqstate,
287 : Relation relation, Index rti);
288 :
289 : #define EvalPlanQualSetSlot(epqstate, slot) ((epqstate)->origslot = (slot))
290 : extern bool EvalPlanQualFetchRowMark(EPQState *epqstate, Index rti, TupleTableSlot *slot);
291 : extern TupleTableSlot *EvalPlanQualNext(EPQState *epqstate);
292 : extern void EvalPlanQualBegin(EPQState *epqstate);
293 : extern void EvalPlanQualEnd(EPQState *epqstate);
294 :
295 : /*
296 : * functions in execProcnode.c
297 : */
298 : extern PlanState *ExecInitNode(Plan *node, EState *estate, int eflags);
299 : extern void ExecSetExecProcNode(PlanState *node, ExecProcNodeMtd function);
300 : extern Node *MultiExecProcNode(PlanState *node);
301 : extern void ExecEndNode(PlanState *node);
302 : extern void ExecShutdownNode(PlanState *node);
303 : extern void ExecSetTupleBound(int64 tuples_needed, PlanState *child_node);
304 :
305 :
306 : /* ----------------------------------------------------------------
307 : * ExecProcNode
308 : *
309 : * Execute the given node to return a(nother) tuple.
310 : * ----------------------------------------------------------------
311 : */
312 : #ifndef FRONTEND
313 : static inline TupleTableSlot *
314 65654092 : ExecProcNode(PlanState *node)
315 : {
316 65654092 : if (node->chgParam != NULL) /* something changed? */
317 155040 : ExecReScan(node); /* let ReScan handle this */
318 :
319 65654092 : return node->ExecProcNode(node);
320 : }
321 : #endif
322 :
323 : /*
324 : * prototypes from functions in execExpr.c
325 : */
326 : extern ExprState *ExecInitExpr(Expr *node, PlanState *parent);
327 : extern ExprState *ExecInitExprWithParams(Expr *node, ParamListInfo ext_params);
328 : extern ExprState *ExecInitQual(List *qual, PlanState *parent);
329 : extern ExprState *ExecInitCheck(List *qual, PlanState *parent);
330 : extern List *ExecInitExprList(List *nodes, PlanState *parent);
331 : extern ExprState *ExecBuildAggTrans(AggState *aggstate, struct AggStatePerPhaseData *phase,
332 : bool doSort, bool doHash, bool nullcheck);
333 : extern ExprState *ExecBuildHash32FromAttrs(TupleDesc desc,
334 : const TupleTableSlotOps *ops,
335 : FmgrInfo *hashfunctions,
336 : Oid *collations,
337 : int numCols,
338 : AttrNumber *keyColIdx,
339 : PlanState *parent,
340 : uint32 init_value);
341 : extern ExprState *ExecBuildHash32Expr(TupleDesc desc,
342 : const TupleTableSlotOps *ops,
343 : const Oid *hashfunc_oids,
344 : const List *collations,
345 : const List *hash_exprs,
346 : const bool *opstrict, PlanState *parent,
347 : uint32 init_value, bool keep_nulls);
348 : extern ExprState *ExecBuildGroupingEqual(TupleDesc ldesc, TupleDesc rdesc,
349 : const TupleTableSlotOps *lops, const TupleTableSlotOps *rops,
350 : int numCols,
351 : const AttrNumber *keyColIdx,
352 : const Oid *eqfunctions,
353 : const Oid *collations,
354 : PlanState *parent);
355 : extern ExprState *ExecBuildParamSetEqual(TupleDesc desc,
356 : const TupleTableSlotOps *lops,
357 : const TupleTableSlotOps *rops,
358 : const Oid *eqfunctions,
359 : const Oid *collations,
360 : const List *param_exprs,
361 : PlanState *parent);
362 : extern ProjectionInfo *ExecBuildProjectionInfo(List *targetList,
363 : ExprContext *econtext,
364 : TupleTableSlot *slot,
365 : PlanState *parent,
366 : TupleDesc inputDesc);
367 : extern ProjectionInfo *ExecBuildUpdateProjection(List *targetList,
368 : bool evalTargetList,
369 : List *targetColnos,
370 : TupleDesc relDesc,
371 : ExprContext *econtext,
372 : TupleTableSlot *slot,
373 : PlanState *parent);
374 : extern ExprState *ExecPrepareExpr(Expr *node, EState *estate);
375 : extern ExprState *ExecPrepareQual(List *qual, EState *estate);
376 : extern ExprState *ExecPrepareCheck(List *qual, EState *estate);
377 : extern List *ExecPrepareExprList(List *nodes, EState *estate);
378 :
379 : /*
380 : * ExecEvalExpr
381 : *
382 : * Evaluate expression identified by "state" in the execution context
383 : * given by "econtext". *isNull is set to the is-null flag for the result,
384 : * and the Datum value is the function result.
385 : *
386 : * The caller should already have switched into the temporary memory
387 : * context econtext->ecxt_per_tuple_memory. The convenience entry point
388 : * ExecEvalExprSwitchContext() is provided for callers who don't prefer to
389 : * do the switch in an outer loop.
390 : */
391 : #ifndef FRONTEND
392 : static inline Datum
393 12050118 : ExecEvalExpr(ExprState *state,
394 : ExprContext *econtext,
395 : bool *isNull)
396 : {
397 12050118 : return state->evalfunc(state, econtext, isNull);
398 : }
399 : #endif
400 :
401 : /*
402 : * ExecEvalExprNoReturn
403 : *
404 : * Like ExecEvalExpr(), but for cases where no return value is expected,
405 : * because the side-effects of expression evaluation are what's desired. This
406 : * is e.g. used for projection and aggregate transition computation.
407 : *
408 : * Evaluate expression identified by "state" in the execution context
409 : * given by "econtext".
410 : *
411 : * The caller should already have switched into the temporary memory context
412 : * econtext->ecxt_per_tuple_memory. The convenience entry point
413 : * ExecEvalExprNoReturnSwitchContext() is provided for callers who don't
414 : * prefer to do the switch in an outer loop.
415 : */
416 : #ifndef FRONTEND
417 : static inline void
418 50348167 : ExecEvalExprNoReturn(ExprState *state,
419 : ExprContext *econtext)
420 : {
421 : PG_USED_FOR_ASSERTS_ONLY Datum retDatum;
422 :
423 50348167 : retDatum = state->evalfunc(state, econtext, NULL);
424 :
425 : Assert(retDatum == (Datum) 0);
426 50341315 : }
427 : #endif
428 :
429 : /*
430 : * ExecEvalExprSwitchContext
431 : *
432 : * Same as ExecEvalExpr, but get into the right allocation context explicitly.
433 : */
434 : #ifndef FRONTEND
435 : static inline Datum
436 60230213 : ExecEvalExprSwitchContext(ExprState *state,
437 : ExprContext *econtext,
438 : bool *isNull)
439 : {
440 : Datum retDatum;
441 : MemoryContext oldContext;
442 :
443 60230213 : oldContext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory);
444 60230213 : retDatum = state->evalfunc(state, econtext, isNull);
445 60228194 : MemoryContextSwitchTo(oldContext);
446 60228194 : return retDatum;
447 : }
448 : #endif
449 :
450 : /*
451 : * ExecEvalExprNoReturnSwitchContext
452 : *
453 : * Same as ExecEvalExprNoReturn, but get into the right allocation context
454 : * explicitly.
455 : */
456 : #ifndef FRONTEND
457 : static inline void
458 50348167 : ExecEvalExprNoReturnSwitchContext(ExprState *state,
459 : ExprContext *econtext)
460 : {
461 : MemoryContext oldContext;
462 :
463 50348167 : oldContext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory);
464 50348167 : ExecEvalExprNoReturn(state, econtext);
465 50341315 : MemoryContextSwitchTo(oldContext);
466 50341315 : }
467 : #endif
468 :
469 : /*
470 : * ExecProject
471 : *
472 : * Projects a tuple based on projection info and stores it in the slot passed
473 : * to ExecBuildProjectionInfo().
474 : *
475 : * Note: the result is always a virtual tuple; therefore it may reference
476 : * the contents of the exprContext's scan tuples and/or temporary results
477 : * constructed in the exprContext. If the caller wishes the result to be
478 : * valid longer than that data will be valid, he must call ExecMaterializeSlot
479 : * on the result slot.
480 : */
481 : #ifndef FRONTEND
482 : static inline TupleTableSlot *
483 35279530 : ExecProject(ProjectionInfo *projInfo)
484 : {
485 35279530 : ExprContext *econtext = projInfo->pi_exprContext;
486 35279530 : ExprState *state = &projInfo->pi_state;
487 35279530 : TupleTableSlot *slot = state->resultslot;
488 :
489 : /*
490 : * Clear any former contents of the result slot. This makes it safe for
491 : * us to use the slot's Datum/isnull arrays as workspace.
492 : */
493 35279530 : ExecClearTuple(slot);
494 :
495 : /* Run the expression */
496 35279530 : ExecEvalExprNoReturnSwitchContext(state, econtext);
497 :
498 : /*
499 : * Successfully formed a result row. Mark the result slot as containing a
500 : * valid virtual tuple (inlined version of ExecStoreVirtualTuple()).
501 : */
502 35272717 : slot->tts_flags &= ~TTS_FLAG_EMPTY;
503 35272717 : slot->tts_nvalid = slot->tts_tupleDescriptor->natts;
504 :
505 35272717 : return slot;
506 : }
507 : #endif
508 :
509 : /*
510 : * ExecQual - evaluate a qual prepared with ExecInitQual (possibly via
511 : * ExecPrepareQual). Returns true if qual is satisfied, else false.
512 : *
513 : * Note: ExecQual used to have a third argument "resultForNull". The
514 : * behavior of this function now corresponds to resultForNull == false.
515 : * If you want the resultForNull == true behavior, see ExecCheck.
516 : */
517 : #ifndef FRONTEND
518 : static inline bool
519 46739994 : ExecQual(ExprState *state, ExprContext *econtext)
520 : {
521 : Datum ret;
522 : bool isnull;
523 :
524 : /* short-circuit (here and in ExecInitQual) for empty restriction list */
525 46739994 : if (state == NULL)
526 2877896 : return true;
527 :
528 : /* verify that expression was compiled using ExecInitQual */
529 : Assert(state->flags & EEO_FLAG_IS_QUAL);
530 :
531 43862098 : ret = ExecEvalExprSwitchContext(state, econtext, &isnull);
532 :
533 : /* EEOP_QUAL should never return NULL */
534 : Assert(!isnull);
535 :
536 43862081 : return DatumGetBool(ret);
537 : }
538 : #endif
539 :
540 : /*
541 : * ExecQualAndReset() - evaluate qual with ExecQual() and reset expression
542 : * context.
543 : */
544 : #ifndef FRONTEND
545 : static inline bool
546 12708107 : ExecQualAndReset(ExprState *state, ExprContext *econtext)
547 : {
548 12708107 : bool ret = ExecQual(state, econtext);
549 :
550 : /* inline ResetExprContext, to avoid ordering issue in this file */
551 12708107 : MemoryContextReset(econtext->ecxt_per_tuple_memory);
552 12708107 : return ret;
553 : }
554 : #endif
555 :
556 : extern bool ExecCheck(ExprState *state, ExprContext *econtext);
557 :
558 : /*
559 : * prototypes from functions in execSRF.c
560 : */
561 : extern SetExprState *ExecInitTableFunctionResult(Expr *expr,
562 : ExprContext *econtext, PlanState *parent);
563 : extern Tuplestorestate *ExecMakeTableFunctionResult(SetExprState *setexpr,
564 : ExprContext *econtext,
565 : MemoryContext argContext,
566 : TupleDesc expectedDesc,
567 : bool randomAccess);
568 : extern SetExprState *ExecInitFunctionResultSet(Expr *expr,
569 : ExprContext *econtext, PlanState *parent);
570 : extern Datum ExecMakeFunctionResultSet(SetExprState *fcache,
571 : ExprContext *econtext,
572 : MemoryContext argContext,
573 : bool *isNull,
574 : ExprDoneCond *isDone);
575 :
576 : /*
577 : * prototypes from functions in execScan.c
578 : */
579 : typedef TupleTableSlot *(*ExecScanAccessMtd) (ScanState *node);
580 : typedef bool (*ExecScanRecheckMtd) (ScanState *node, TupleTableSlot *slot);
581 :
582 : extern TupleTableSlot *ExecScan(ScanState *node, ExecScanAccessMtd accessMtd,
583 : ExecScanRecheckMtd recheckMtd);
584 : extern void ExecAssignScanProjectionInfo(ScanState *node);
585 : extern void ExecAssignScanProjectionInfoWithVarno(ScanState *node, int varno);
586 : extern void ExecScanReScan(ScanState *node);
587 :
588 : /*
589 : * prototypes from functions in execTuples.c
590 : */
591 : extern void ExecInitResultTypeTL(PlanState *planstate);
592 : extern void ExecInitResultSlot(PlanState *planstate,
593 : const TupleTableSlotOps *tts_ops);
594 : extern void ExecInitResultTupleSlotTL(PlanState *planstate,
595 : const TupleTableSlotOps *tts_ops);
596 : extern void ExecInitScanTupleSlot(EState *estate, ScanState *scanstate,
597 : TupleDesc tupledesc,
598 : const TupleTableSlotOps *tts_ops);
599 : extern TupleTableSlot *ExecInitExtraTupleSlot(EState *estate,
600 : TupleDesc tupledesc,
601 : const TupleTableSlotOps *tts_ops);
602 : extern TupleTableSlot *ExecInitNullTupleSlot(EState *estate, TupleDesc tupType,
603 : const TupleTableSlotOps *tts_ops);
604 : extern TupleDesc ExecTypeFromTL(List *targetList);
605 : extern TupleDesc ExecCleanTypeFromTL(List *targetList);
606 : extern TupleDesc ExecTypeFromExprList(List *exprList);
607 : extern void ExecTypeSetColNames(TupleDesc typeInfo, List *namesList);
608 : extern void UpdateChangedParamSet(PlanState *node, Bitmapset *newchg);
609 :
610 : typedef struct TupOutputState
611 : {
612 : TupleTableSlot *slot;
613 : DestReceiver *dest;
614 : } TupOutputState;
615 :
616 : extern TupOutputState *begin_tup_output_tupdesc(DestReceiver *dest,
617 : TupleDesc tupdesc,
618 : const TupleTableSlotOps *tts_ops);
619 : extern void do_tup_output(TupOutputState *tstate, const Datum *values, const bool *isnull);
620 : extern void do_text_output_multiline(TupOutputState *tstate, const char *txt);
621 : extern void end_tup_output(TupOutputState *tstate);
622 :
623 : /*
624 : * Write a single line of text given as a C string.
625 : *
626 : * Should only be used with a single-TEXT-attribute tupdesc.
627 : */
628 : #define do_text_output_oneline(tstate, str_to_emit) \
629 : do { \
630 : Datum values_[1]; \
631 : bool isnull_[1]; \
632 : values_[0] = PointerGetDatum(cstring_to_text(str_to_emit)); \
633 : isnull_[0] = false; \
634 : do_tup_output(tstate, values_, isnull_); \
635 : pfree(DatumGetPointer(values_[0])); \
636 : } while (0)
637 :
638 :
639 : /*
640 : * prototypes from functions in execUtils.c
641 : */
642 : extern EState *CreateExecutorState(void);
643 : extern void FreeExecutorState(EState *estate);
644 : extern ExprContext *CreateExprContext(EState *estate);
645 : extern ExprContext *CreateWorkExprContext(EState *estate);
646 : extern ExprContext *CreateStandaloneExprContext(void);
647 : extern void FreeExprContext(ExprContext *econtext, bool isCommit);
648 : extern void ReScanExprContext(ExprContext *econtext);
649 :
650 : #define ResetExprContext(econtext) \
651 : MemoryContextReset((econtext)->ecxt_per_tuple_memory)
652 :
653 : extern ExprContext *MakePerTupleExprContext(EState *estate);
654 :
655 : /* Get an EState's per-output-tuple exprcontext, making it if first use */
656 : #define GetPerTupleExprContext(estate) \
657 : ((estate)->es_per_tuple_exprcontext ? \
658 : (estate)->es_per_tuple_exprcontext : \
659 : MakePerTupleExprContext(estate))
660 :
661 : #define GetPerTupleMemoryContext(estate) \
662 : (GetPerTupleExprContext(estate)->ecxt_per_tuple_memory)
663 :
664 : /* Reset an EState's per-output-tuple exprcontext, if one's been created */
665 : #define ResetPerTupleExprContext(estate) \
666 : do { \
667 : if ((estate)->es_per_tuple_exprcontext) \
668 : ResetExprContext((estate)->es_per_tuple_exprcontext); \
669 : } while (0)
670 :
671 : extern void ExecAssignExprContext(EState *estate, PlanState *planstate);
672 : extern TupleDesc ExecGetResultType(PlanState *planstate);
673 : extern const TupleTableSlotOps *ExecGetResultSlotOps(PlanState *planstate,
674 : bool *isfixed);
675 : extern const TupleTableSlotOps *ExecGetCommonSlotOps(PlanState **planstates,
676 : int nplans);
677 : extern const TupleTableSlotOps *ExecGetCommonChildSlotOps(PlanState *ps);
678 : extern void ExecAssignProjectionInfo(PlanState *planstate,
679 : TupleDesc inputDesc);
680 : extern void ExecConditionalAssignProjectionInfo(PlanState *planstate,
681 : TupleDesc inputDesc, int varno);
682 : extern void ExecAssignScanType(ScanState *scanstate, TupleDesc tupDesc);
683 : extern void ExecCreateScanSlotFromOuterPlan(EState *estate,
684 : ScanState *scanstate,
685 : const TupleTableSlotOps *tts_ops);
686 :
687 : extern bool ExecRelationIsTargetRelation(EState *estate, Index scanrelid);
688 :
689 : extern Relation ExecOpenScanRelation(EState *estate, Index scanrelid, int eflags);
690 :
691 : extern void ExecInitRangeTable(EState *estate, List *rangeTable, List *permInfos,
692 : Bitmapset *unpruned_relids);
693 : extern void ExecCloseRangeTableRelations(EState *estate);
694 : extern void ExecCloseResultRelations(EState *estate);
695 :
696 : static inline RangeTblEntry *
697 436230 : exec_rt_fetch(Index rti, EState *estate)
698 : {
699 436230 : return (RangeTblEntry *) list_nth(estate->es_range_table, rti - 1);
700 : }
701 :
702 : extern Relation ExecGetRangeTableRelation(EState *estate, Index rti,
703 : bool isResultRel);
704 : extern void ExecInitResultRelation(EState *estate, ResultRelInfo *resultRelInfo,
705 : Index rti);
706 :
707 : extern int executor_errposition(EState *estate, int location);
708 :
709 : extern void RegisterExprContextCallback(ExprContext *econtext,
710 : ExprContextCallbackFunction function,
711 : Datum arg);
712 : extern void UnregisterExprContextCallback(ExprContext *econtext,
713 : ExprContextCallbackFunction function,
714 : Datum arg);
715 :
716 : extern Datum GetAttributeByName(HeapTupleHeader tuple, const char *attname,
717 : bool *isNull);
718 : extern Datum GetAttributeByNum(HeapTupleHeader tuple, AttrNumber attrno,
719 : bool *isNull);
720 :
721 : extern int ExecTargetListLength(List *targetlist);
722 : extern int ExecCleanTargetListLength(List *targetlist);
723 :
724 : extern TupleTableSlot *ExecGetTriggerOldSlot(EState *estate, ResultRelInfo *relInfo);
725 : extern TupleTableSlot *ExecGetTriggerNewSlot(EState *estate, ResultRelInfo *relInfo);
726 : extern TupleTableSlot *ExecGetReturningSlot(EState *estate, ResultRelInfo *relInfo);
727 : extern TupleTableSlot *ExecGetAllNullSlot(EState *estate, ResultRelInfo *relInfo);
728 : extern TupleConversionMap *ExecGetChildToRootMap(ResultRelInfo *resultRelInfo);
729 : extern TupleConversionMap *ExecGetRootToChildMap(ResultRelInfo *resultRelInfo, EState *estate);
730 :
731 : extern Oid ExecGetResultRelCheckAsUser(ResultRelInfo *relInfo, EState *estate);
732 : extern Bitmapset *ExecGetInsertedCols(ResultRelInfo *relinfo, EState *estate);
733 : extern Bitmapset *ExecGetUpdatedCols(ResultRelInfo *relinfo, EState *estate);
734 : extern Bitmapset *ExecGetExtraUpdatedCols(ResultRelInfo *relinfo, EState *estate);
735 : extern Bitmapset *ExecGetAllUpdatedCols(ResultRelInfo *relinfo, EState *estate);
736 :
737 : /*
738 : * prototypes from functions in execIndexing.c
739 : */
740 : extern void ExecOpenIndices(ResultRelInfo *resultRelInfo, bool speculative);
741 : extern void ExecCloseIndices(ResultRelInfo *resultRelInfo);
742 : extern List *ExecInsertIndexTuples(ResultRelInfo *resultRelInfo,
743 : TupleTableSlot *slot, EState *estate,
744 : bool update,
745 : bool noDupErr,
746 : bool *specConflict, List *arbiterIndexes,
747 : bool onlySummarizing);
748 : extern bool ExecCheckIndexConstraints(ResultRelInfo *resultRelInfo,
749 : TupleTableSlot *slot,
750 : EState *estate, ItemPointer conflictTid,
751 : const ItemPointerData *tupleid,
752 : List *arbiterIndexes);
753 : extern void check_exclusion_constraint(Relation heap, Relation index,
754 : IndexInfo *indexInfo,
755 : const ItemPointerData *tupleid,
756 : const Datum *values, const bool *isnull,
757 : EState *estate, bool newIndex);
758 :
759 : /*
760 : * prototypes from functions in execReplication.c
761 : */
762 : extern bool RelationFindReplTupleByIndex(Relation rel, Oid idxoid,
763 : LockTupleMode lockmode,
764 : TupleTableSlot *searchslot,
765 : TupleTableSlot *outslot);
766 : extern bool RelationFindReplTupleSeq(Relation rel, LockTupleMode lockmode,
767 : TupleTableSlot *searchslot, TupleTableSlot *outslot);
768 : extern bool RelationFindDeletedTupleInfoSeq(Relation rel,
769 : TupleTableSlot *searchslot,
770 : TransactionId oldestxmin,
771 : TransactionId *delete_xid,
772 : ReplOriginId *delete_origin,
773 : TimestampTz *delete_time);
774 : extern bool RelationFindDeletedTupleInfoByIndex(Relation rel, Oid idxoid,
775 : TupleTableSlot *searchslot,
776 : TransactionId oldestxmin,
777 : TransactionId *delete_xid,
778 : ReplOriginId *delete_origin,
779 : TimestampTz *delete_time);
780 : extern void ExecSimpleRelationInsert(ResultRelInfo *resultRelInfo,
781 : EState *estate, TupleTableSlot *slot);
782 : extern void ExecSimpleRelationUpdate(ResultRelInfo *resultRelInfo,
783 : EState *estate, EPQState *epqstate,
784 : TupleTableSlot *searchslot, TupleTableSlot *slot);
785 : extern void ExecSimpleRelationDelete(ResultRelInfo *resultRelInfo,
786 : EState *estate, EPQState *epqstate,
787 : TupleTableSlot *searchslot);
788 : extern void CheckCmdReplicaIdentity(Relation rel, CmdType cmd);
789 :
790 : extern void CheckSubscriptionRelkind(char localrelkind, char remoterelkind,
791 : const char *nspname, const char *relname);
792 :
793 : /*
794 : * prototypes from functions in nodeModifyTable.c
795 : */
796 : extern TupleTableSlot *ExecGetUpdateNewTuple(ResultRelInfo *relinfo,
797 : TupleTableSlot *planSlot,
798 : TupleTableSlot *oldSlot);
799 : extern ResultRelInfo *ExecLookupResultRelByOid(ModifyTableState *node,
800 : Oid resultoid,
801 : bool missing_ok,
802 : bool update_cache);
803 :
804 : #endif /* EXECUTOR_H */
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