text: /*-------------------------------------------------------------------------
   *
   * executor.h
   *	  support for the POSTGRES executor module
   *
   *
   * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
   * src/include/executor/executor.h
   *
   *-------------------------------------------------------------------------
   */
  #ifndef EXECUTOR_H
  #define EXECUTOR_H
  
  #include "executor/execdesc.h"
  #include "fmgr.h"
  #include "nodes/lockoptions.h"
  #include "nodes/parsenodes.h"
  #include "utils/memutils.h"
  
  
  /*
   * The "eflags" argument to ExecutorStart and the various ExecInitNode
   * routines is a bitwise OR of the following flag bits, which tell the
   * called plan node what to expect.  Note that the flags will get modified
   * as they are passed down the plan tree, since an upper node may require
   * functionality in its subnode not demanded of the plan as a whole
   * (example: MergeJoin requires mark/restore capability in its inner input),
   * or an upper node may shield its input from some functionality requirement
   * (example: Materialize shields its input from needing to do backward scan).
   *
   * EXPLAIN_ONLY indicates that the plan tree is being initialized just so
   * EXPLAIN can print it out; it will not be run.  Hence, no side-effects
   * of startup should occur.  However, error checks (such as permission checks)
   * should be performed.
   *
   * REWIND indicates that the plan node should try to efficiently support
   * rescans without parameter changes.  (Nodes must support ExecReScan calls
   * in any case, but if this flag was not given, they are at liberty to do it
   * through complete recalculation.  Note that a parameter change forces a
   * full recalculation in any case.)
   *
   * BACKWARD indicates that the plan node must respect the es_direction flag.
   * When this is not passed, the plan node will only be run forwards.
   *
   * MARK indicates that the plan node must support Mark/Restore calls.
   * When this is not passed, no Mark/Restore will occur.
   *
   * SKIP_TRIGGERS tells ExecutorStart/ExecutorFinish to skip calling
   * AfterTriggerBeginQuery/AfterTriggerEndQuery.  This does not necessarily
   * mean that the plan can't queue any AFTER triggers; just that the caller
   * is responsible for there being a trigger context for them to be queued in.
   */
  #define EXEC_FLAG_EXPLAIN_ONLY	0x0001	/* EXPLAIN, no ANALYZE */
  #define EXEC_FLAG_REWIND		0x0002	/* need efficient rescan */
  #define EXEC_FLAG_BACKWARD		0x0004	/* need backward scan */
  #define EXEC_FLAG_MARK			0x0008	/* need mark/restore */
  #define EXEC_FLAG_SKIP_TRIGGERS 0x0010	/* skip AfterTrigger calls */
  #define EXEC_FLAG_WITH_NO_DATA	0x0020	/* rel scannability doesn't matter */
  
  
  /* Hook for plugins to get control in ExecutorStart() */
  typedef void (*ExecutorStart_hook_type) (QueryDesc *queryDesc, int eflags);
  extern PGDLLIMPORT ExecutorStart_hook_type ExecutorStart_hook;
  
  /* Hook for plugins to get control in ExecutorRun() */
  typedef void (*ExecutorRun_hook_type) (QueryDesc *queryDesc,
  									   ScanDirection direction,
  									   uint64 count,
  									   bool execute_once);
  extern PGDLLIMPORT ExecutorRun_hook_type ExecutorRun_hook;
  
  /* Hook for plugins to get control in ExecutorFinish() */
  typedef void (*ExecutorFinish_hook_type) (QueryDesc *queryDesc);
  extern PGDLLIMPORT ExecutorFinish_hook_type ExecutorFinish_hook;
  
  /* Hook for plugins to get control in ExecutorEnd() */
  typedef void (*ExecutorEnd_hook_type) (QueryDesc *queryDesc);
  extern PGDLLIMPORT ExecutorEnd_hook_type ExecutorEnd_hook;
  
  /* Hook for plugins to get control in ExecCheckRTPerms() */
  typedef bool (*ExecutorCheckPerms_hook_type) (List *, bool);
  extern PGDLLIMPORT ExecutorCheckPerms_hook_type ExecutorCheckPerms_hook;
  
  
  /*
   * prototypes from functions in execAmi.c
   */
  struct Path;					/* avoid including pathnodes.h here */
  
  extern void ExecReScan(PlanState *node);
  extern void ExecMarkPos(PlanState *node);
  extern void ExecRestrPos(PlanState *node);
  extern bool ExecSupportsMarkRestore(struct Path *pathnode);
  extern bool ExecSupportsBackwardScan(Plan *node);
  extern bool ExecMaterializesOutput(NodeTag plantype);
  
  /*
   * prototypes from functions in execCurrent.c
   */
  extern bool execCurrentOf(CurrentOfExpr *cexpr,
  						  ExprContext *econtext,
  						  Oid table_oid,
  						  ItemPointer current_tid);
  
  /*
   * prototypes from functions in execGrouping.c
   */
  extern ExprState *execTuplesMatchPrepare(TupleDesc desc,
  										 int numCols,
  										 const AttrNumber *keyColIdx,
  										 const Oid *eqOperators,
  										 const Oid *collations,
  										 PlanState *parent);
  extern void execTuplesHashPrepare(int numCols,
  								  const Oid *eqOperators,
  								  Oid **eqFuncOids,
  								  FmgrInfo **hashFunctions);
  extern TupleHashTable BuildTupleHashTable(PlanState *parent,
  										  TupleDesc inputDesc,
  										  int numCols, AttrNumber *keyColIdx,
  										  const Oid *eqfuncoids,
  										  FmgrInfo *hashfunctions,
  										  Oid *collations,
  										  long nbuckets, Size additionalsize,
  										  MemoryContext tablecxt,
  										  MemoryContext tempcxt, bool use_variable_hash_iv);
  extern TupleHashTable BuildTupleHashTableExt(PlanState *parent,
  											 TupleDesc inputDesc,
  											 int numCols, AttrNumber *keyColIdx,
  											 const Oid *eqfuncoids,
  											 FmgrInfo *hashfunctions,
  											 Oid *collations,
  											 long nbuckets, Size additionalsize,
  											 MemoryContext metacxt,
  											 MemoryContext tablecxt,
  											 MemoryContext tempcxt, bool use_variable_hash_iv);
  extern TupleHashEntry LookupTupleHashEntry(TupleHashTable hashtable,
  										   TupleTableSlot *slot,
  										   bool *isnew, uint32 *hash);
  extern uint32 TupleHashTableHash(TupleHashTable hashtable,
  								 TupleTableSlot *slot);
  extern TupleHashEntry LookupTupleHashEntryHash(TupleHashTable hashtable,
  											   TupleTableSlot *slot,
  											   bool *isnew, uint32 hash);
  extern TupleHashEntry FindTupleHashEntry(TupleHashTable hashtable,
  										 TupleTableSlot *slot,
  										 ExprState *eqcomp,
  										 FmgrInfo *hashfunctions);
  extern void ResetTupleHashTable(TupleHashTable hashtable);
  
  /*
   * prototypes from functions in execJunk.c
   */
  extern JunkFilter *ExecInitJunkFilter(List *targetList,
  									  TupleTableSlot *slot);
  extern JunkFilter *ExecInitJunkFilterConversion(List *targetList,
  												TupleDesc cleanTupType,
  												TupleTableSlot *slot);
  extern AttrNumber ExecFindJunkAttribute(JunkFilter *junkfilter,
  										const char *attrName);
  extern AttrNumber ExecFindJunkAttributeInTlist(List *targetlist,
  											   const char *attrName);
  extern Datum ExecGetJunkAttribute(TupleTableSlot *slot, AttrNumber attno,
  								  bool *isNull);
  extern TupleTableSlot *ExecFilterJunk(JunkFilter *junkfilter,
  									  TupleTableSlot *slot);
  
  
  /*
   * prototypes from functions in execMain.c
   */
  extern void ExecutorStart(QueryDesc *queryDesc, int eflags);
  extern void standard_ExecutorStart(QueryDesc *queryDesc, int eflags);
  extern void ExecutorRun(QueryDesc *queryDesc,
  						ScanDirection direction, uint64 count, bool execute_once);
  extern void standard_ExecutorRun(QueryDesc *queryDesc,
  								 ScanDirection direction, uint64 count, bool execute_once);
  extern void ExecutorFinish(QueryDesc *queryDesc);
  extern void standard_ExecutorFinish(QueryDesc *queryDesc);
  extern void ExecutorEnd(QueryDesc *queryDesc);
  extern void standard_ExecutorEnd(QueryDesc *queryDesc);
  extern void ExecutorRewind(QueryDesc *queryDesc);
  extern bool ExecCheckRTPerms(List *rangeTable, bool ereport_on_violation);
  extern void CheckValidResultRel(ResultRelInfo *resultRelInfo, CmdType operation);
  extern void InitResultRelInfo(ResultRelInfo *resultRelInfo,
  							  Relation resultRelationDesc,
  							  Index resultRelationIndex,
  							  Relation partition_root,
  							  int instrument_options);
  extern ResultRelInfo *ExecGetTriggerResultRel(EState *estate, Oid relid);
  extern void ExecConstraints(ResultRelInfo *resultRelInfo,
  							TupleTableSlot *slot, EState *estate);
  extern bool ExecPartitionCheck(ResultRelInfo *resultRelInfo,
  							   TupleTableSlot *slot, EState *estate, bool emitError);
  extern void ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
  										TupleTableSlot *slot, EState *estate);
  extern void ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
  								 TupleTableSlot *slot, EState *estate);
  extern LockTupleMode ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo);
  extern ExecRowMark *ExecFindRowMark(EState *estate, Index rti, bool missing_ok);
  extern ExecAuxRowMark *ExecBuildAuxRowMark(ExecRowMark *erm, List *targetlist);
  extern TupleTableSlot *EvalPlanQual(EPQState *epqstate, Relation relation,
  									Index rti, TupleTableSlot *testslot);
  extern void EvalPlanQualInit(EPQState *epqstate, EState *parentestate,
  							 Plan *subplan, List *auxrowmarks, int epqParam);
  extern void EvalPlanQualSetPlan(EPQState *epqstate,
  								Plan *subplan, List *auxrowmarks);
  extern TupleTableSlot *EvalPlanQualSlot(EPQState *epqstate,
  										Relation relation, Index rti);
  
  #define EvalPlanQualSetSlot(epqstate, slot)  ((epqstate)->origslot = (slot))
  extern bool EvalPlanQualFetchRowMark(EPQState *epqstate, Index rti, TupleTableSlot *slot);
  extern TupleTableSlot *EvalPlanQualNext(EPQState *epqstate);
  extern void EvalPlanQualBegin(EPQState *epqstate);
  extern void EvalPlanQualEnd(EPQState *epqstate);
  
  /*
   * functions in execProcnode.c
   */
  extern PlanState *ExecInitNode(Plan *node, EState *estate, int eflags);
  extern void ExecSetExecProcNode(PlanState *node, ExecProcNodeMtd function);
  extern Node *MultiExecProcNode(PlanState *node);
  extern void ExecEndNode(PlanState *node);
  extern bool ExecShutdownNode(PlanState *node);
  extern void ExecSetTupleBound(int64 tuples_needed, PlanState *child_node);
  
  
  /* ----------------------------------------------------------------
   *		ExecProcNode
   *
   *		Execute the given node to return a(nother) tuple.
   * ----------------------------------------------------------------
   */
  #ifndef FRONTEND
  static inline TupleTableSlot *
  ExecProcNode(PlanState *node)
  {
  	if (node->chgParam != NULL) /* something changed? */
  		ExecReScan(node);		/* let ReScan handle this */
  
  	return node->ExecProcNode(node);
  }
  #endif
  
  /*
   * prototypes from functions in execExpr.c
   */
  extern ExprState *ExecInitExpr(Expr *node, PlanState *parent);
  extern ExprState *ExecInitExprWithParams(Expr *node, ParamListInfo ext_params);
  extern ExprState *ExecInitQual(List *qual, PlanState *parent);
  extern ExprState *ExecInitCheck(List *qual, PlanState *parent);
  extern List *ExecInitExprList(List *nodes, PlanState *parent);
  extern ExprState *ExecBuildAggTrans(AggState *aggstate, struct AggStatePerPhaseData *phase,
  									bool doSort, bool doHash, bool nullcheck);
  extern ExprState *ExecBuildGroupingEqual(TupleDesc ldesc, TupleDesc rdesc,
  										 const TupleTableSlotOps *lops, const TupleTableSlotOps *rops,
  										 int numCols,
  										 const AttrNumber *keyColIdx,
  										 const Oid *eqfunctions,
  										 const Oid *collations,
  										 PlanState *parent);
  extern ProjectionInfo *ExecBuildProjectionInfo(List *targetList,
  											   ExprContext *econtext,
  											   TupleTableSlot *slot,
  											   PlanState *parent,
  											   TupleDesc inputDesc);
  extern ExprState *ExecPrepareExpr(Expr *node, EState *estate);
  extern ExprState *ExecPrepareQual(List *qual, EState *estate);
  extern ExprState *ExecPrepareCheck(List *qual, EState *estate);
  extern List *ExecPrepareExprList(List *nodes, EState *estate);
  
  /*
   * ExecEvalExpr
   *
   * Evaluate expression identified by "state" in the execution context
   * given by "econtext".  *isNull is set to the is-null flag for the result,
   * and the Datum value is the function result.
   *
   * The caller should already have switched into the temporary memory
   * context econtext->ecxt_per_tuple_memory.  The convenience entry point
   * ExecEvalExprSwitchContext() is provided for callers who don't prefer to
   * do the switch in an outer loop.
   */
  #ifndef FRONTEND
  static inline Datum
  ExecEvalExpr(ExprState *state,
  			 ExprContext *econtext,
  			 bool *isNull)
  {
  	return state->evalfunc(state, econtext, isNull);
  }
  #endif
  
  /*
   * ExecEvalExprSwitchContext
   *
   * Same as ExecEvalExpr, but get into the right allocation context explicitly.
   */
  #ifndef FRONTEND
  static inline Datum
  ExecEvalExprSwitchContext(ExprState *state,
  						  ExprContext *econtext,
  						  bool *isNull)
  {
  	Datum		retDatum;
  	MemoryContext oldContext;
  
  	oldContext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory);
  	retDatum = state->evalfunc(state, econtext, isNull);
  	MemoryContextSwitchTo(oldContext);
  	return retDatum;
  }
  #endif
  
  /*
   * ExecProject
   *
   * Projects a tuple based on projection info and stores it in the slot passed
   * to ExecBuildProjectionInfo().
   *
   * Note: the result is always a virtual tuple; therefore it may reference
   * the contents of the exprContext's scan tuples and/or temporary results
   * constructed in the exprContext.  If the caller wishes the result to be
   * valid longer than that data will be valid, he must call ExecMaterializeSlot
   * on the result slot.
   */
  #ifndef FRONTEND
  static inline TupleTableSlot *
  ExecProject(ProjectionInfo *projInfo)
  {
  	ExprContext *econtext = projInfo->pi_exprContext;
  	ExprState  *state = &projInfo->pi_state;
  	TupleTableSlot *slot = state->resultslot;
  	bool		isnull;
  
  	/*
  	 * Clear any former contents of the result slot.  This makes it safe for
  	 * us to use the slot's Datum/isnull arrays as workspace.
  	 */
  	ExecClearTuple(slot);
  
  	/* Run the expression, discarding scalar result from the last column. */
  	(void) ExecEvalExprSwitchContext(state, econtext, &isnull);
  
  	/*
  	 * Successfully formed a result row.  Mark the result slot as containing a
  	 * valid virtual tuple (inlined version of ExecStoreVirtualTuple()).
  	 */
  	slot->tts_flags &= ~TTS_FLAG_EMPTY;
  	slot->tts_nvalid = slot->tts_tupleDescriptor->natts;
  
  	return slot;
  }
  #endif
  
  /*
   * ExecQual - evaluate a qual prepared with ExecInitQual (possibly via
   * ExecPrepareQual).  Returns true if qual is satisfied, else false.
   *
   * Note: ExecQual used to have a third argument "resultForNull".  The
   * behavior of this function now corresponds to resultForNull == false.
   * If you want the resultForNull == true behavior, see ExecCheck.
   */
  #ifndef FRONTEND
  static inline bool
  ExecQual(ExprState *state, ExprContext *econtext)
  {
  	Datum		ret;
  	bool		isnull;
  
  	/* short-circuit (here and in ExecInitQual) for empty restriction list */
  	if (state == NULL)
  		return true;
  
  	/* verify that expression was compiled using ExecInitQual */
  	Assert(state->flags & EEO_FLAG_IS_QUAL);
  
  	ret = ExecEvalExprSwitchContext(state, econtext, &isnull);
  
  	/* EEOP_QUAL should never return NULL */
  	Assert(!isnull);
  
  	return DatumGetBool(ret);
  }
  #endif
  
  /*
   * ExecQualAndReset() - evaluate qual with ExecQual() and reset expression
   * context.
   */
  #ifndef FRONTEND
  static inline bool
  ExecQualAndReset(ExprState *state, ExprContext *econtext)
  {
  	bool		ret = ExecQual(state, econtext);
  
  	/* inline ResetExprContext, to avoid ordering issue in this file */
  	MemoryContextReset(econtext->ecxt_per_tuple_memory);
  	return ret;
  }
  #endif
  
  extern bool ExecCheck(ExprState *state, ExprContext *context);
  
  /*
   * prototypes from functions in execSRF.c
   */
  extern SetExprState *ExecInitTableFunctionResult(Expr *expr,
  												 ExprContext *econtext, PlanState *parent);
  extern Tuplestorestate *ExecMakeTableFunctionResult(SetExprState *setexpr,
  													ExprContext *econtext,
  													MemoryContext argContext,
  													TupleDesc expectedDesc,
  													bool randomAccess);
  extern SetExprState *ExecInitFunctionResultSet(Expr *expr,
  											   ExprContext *econtext, PlanState *parent);
  extern Datum ExecMakeFunctionResultSet(SetExprState *fcache,
  									   ExprContext *econtext,
  									   MemoryContext argContext,
  									   bool *isNull,
  									   ExprDoneCond *isDone);
  
  /*
   * prototypes from functions in execScan.c
   */
  typedef TupleTableSlot *(*ExecScanAccessMtd) (ScanState *node);
  typedef bool (*ExecScanRecheckMtd) (ScanState *node, TupleTableSlot *slot);
  
  extern TupleTableSlot *ExecScan(ScanState *node, ExecScanAccessMtd accessMtd,
  								ExecScanRecheckMtd recheckMtd);
  extern void ExecAssignScanProjectionInfo(ScanState *node);
  extern void ExecAssignScanProjectionInfoWithVarno(ScanState *node, Index varno);
  extern void ExecScanReScan(ScanState *node);
  
  /*
   * prototypes from functions in execTuples.c
   */
  extern void ExecInitResultTypeTL(PlanState *planstate);
  extern void ExecInitResultSlot(PlanState *planstate,
  							   const TupleTableSlotOps *tts_ops);
  extern void ExecInitResultTupleSlotTL(PlanState *planstate,
  									  const TupleTableSlotOps *tts_ops);
  extern void ExecInitScanTupleSlot(EState *estate, ScanState *scanstate,
  								  TupleDesc tupleDesc,
  								  const TupleTableSlotOps *tts_ops);
  extern TupleTableSlot *ExecInitExtraTupleSlot(EState *estate,
  											  TupleDesc tupledesc,
  											  const TupleTableSlotOps *tts_ops);
  extern TupleTableSlot *ExecInitNullTupleSlot(EState *estate, TupleDesc tupType,
  											 const TupleTableSlotOps *tts_ops);
  extern TupleDesc ExecTypeFromTL(List *targetList);
  extern TupleDesc ExecCleanTypeFromTL(List *targetList);
  extern TupleDesc ExecTypeFromExprList(List *exprList);
  extern void ExecTypeSetColNames(TupleDesc typeInfo, List *namesList);
  extern void UpdateChangedParamSet(PlanState *node, Bitmapset *newchg);
  
  typedef struct TupOutputState
  {
  	TupleTableSlot *slot;
  	DestReceiver *dest;
  } TupOutputState;
  
  extern TupOutputState *begin_tup_output_tupdesc(DestReceiver *dest,
  												TupleDesc tupdesc,
  												const TupleTableSlotOps *tts_ops);
  extern void do_tup_output(TupOutputState *tstate, Datum *values, bool *isnull);
  extern void do_text_output_multiline(TupOutputState *tstate, const char *txt);
  extern void end_tup_output(TupOutputState *tstate);
  
  /*
   * Write a single line of text given as a C string.
   *
   * Should only be used with a single-TEXT-attribute tupdesc.
   */
  #define do_text_output_oneline(tstate, str_to_emit) \
  	do { \
  		Datum	values_[1]; \
  		bool	isnull_[1]; \
  		values_[0] = PointerGetDatum(cstring_to_text(str_to_emit)); \
  		isnull_[0] = false; \
  		do_tup_output(tstate, values_, isnull_); \
  		pfree(DatumGetPointer(values_[0])); \
  	} while (0)
  
  
  /*
   * prototypes from functions in execUtils.c
   */
  extern EState *CreateExecutorState(void);
  extern void FreeExecutorState(EState *estate);
  extern ExprContext *CreateExprContext(EState *estate);
  extern ExprContext *CreateWorkExprContext(EState *estate);
  extern ExprContext *CreateStandaloneExprContext(void);
  extern void FreeExprContext(ExprContext *econtext, bool isCommit);
  extern void ReScanExprContext(ExprContext *econtext);
  
  #define ResetExprContext(econtext) \
  	MemoryContextReset((econtext)->ecxt_per_tuple_memory)
  
  extern ExprContext *MakePerTupleExprContext(EState *estate);
  
  /* Get an EState's per-output-tuple exprcontext, making it if first use */
  #define GetPerTupleExprContext(estate) \
  	((estate)->es_per_tuple_exprcontext ? \
  	 (estate)->es_per_tuple_exprcontext : \
  	 MakePerTupleExprContext(estate))
  
  #define GetPerTupleMemoryContext(estate) \
  	(GetPerTupleExprContext(estate)->ecxt_per_tuple_memory)
  
  /* Reset an EState's per-output-tuple exprcontext, if one's been created */
  #define ResetPerTupleExprContext(estate) \
  	do { \
  		if ((estate)->es_per_tuple_exprcontext) \
  			ResetExprContext((estate)->es_per_tuple_exprcontext); \
  	} while (0)
  
  extern void ExecAssignExprContext(EState *estate, PlanState *planstate);
  extern TupleDesc ExecGetResultType(PlanState *planstate);
  extern const TupleTableSlotOps *ExecGetResultSlotOps(PlanState *planstate,
  													 bool *isfixed);
  extern void ExecAssignProjectionInfo(PlanState *planstate,
  									 TupleDesc inputDesc);
  extern void ExecConditionalAssignProjectionInfo(PlanState *planstate,
  												TupleDesc inputDesc, Index varno);
  extern void ExecFreeExprContext(PlanState *planstate);
  extern void ExecAssignScanType(ScanState *scanstate, TupleDesc tupDesc);
  extern void ExecCreateScanSlotFromOuterPlan(EState *estate,
  											ScanState *scanstate,
  											const TupleTableSlotOps *tts_ops);
  
  extern bool ExecRelationIsTargetRelation(EState *estate, Index scanrelid);
  
  extern Relation ExecOpenScanRelation(EState *estate, Index scanrelid, int eflags);
  
  extern void ExecInitRangeTable(EState *estate, List *rangeTable);
  extern void ExecCloseRangeTableRelations(EState *estate);
  extern void ExecCloseResultRelations(EState *estate);
  
  static inline RangeTblEntry *
  exec_rt_fetch(Index rti, EState *estate)
  {
  	return (RangeTblEntry *) list_nth(estate->es_range_table, rti - 1);
  }
  
  extern Relation ExecGetRangeTableRelation(EState *estate, Index rti);
  extern void ExecInitResultRelation(EState *estate, ResultRelInfo *resultRelInfo,
  								   Index rti);
  
  extern int	executor_errposition(EState *estate, int location);
  
  extern void RegisterExprContextCallback(ExprContext *econtext,
  										ExprContextCallbackFunction function,
  										Datum arg);
  extern void UnregisterExprContextCallback(ExprContext *econtext,
  										  ExprContextCallbackFunction function,
  										  Datum arg);
  
  extern Datum GetAttributeByName(HeapTupleHeader tuple, const char *attname,
  								bool *isNull);
  extern Datum GetAttributeByNum(HeapTupleHeader tuple, AttrNumber attrno,
  							   bool *isNull);
  
  extern int	ExecTargetListLength(List *targetlist);
  extern int	ExecCleanTargetListLength(List *targetlist);
  
  extern TupleTableSlot *ExecGetTriggerOldSlot(EState *estate, ResultRelInfo *relInfo);
  extern TupleTableSlot *ExecGetTriggerNewSlot(EState *estate, ResultRelInfo *relInfo);
  extern TupleTableSlot *ExecGetReturningSlot(EState *estate, ResultRelInfo *relInfo);
  
  /*
   * prototypes from functions in execIndexing.c
   */
  extern void ExecOpenIndices(ResultRelInfo *resultRelInfo, bool speculative);
  extern void ExecCloseIndices(ResultRelInfo *resultRelInfo);
  extern List *ExecInsertIndexTuples(ResultRelInfo *resultRelInfo,
  								   TupleTableSlot *slot, EState *estate,
  								   bool noDupErr,
  								   bool *specConflict, List *arbiterIndexes);
  extern bool ExecCheckIndexConstraints(ResultRelInfo *resultRelInfo,
  									  TupleTableSlot *slot,
  									  EState *estate, ItemPointer conflictTid,
  									  List *arbiterIndexes);
  extern void check_exclusion_constraint(Relation heap, Relation index,
  									   IndexInfo *indexInfo,
  									   ItemPointer tupleid,
  									   Datum *values, bool *isnull,
  									   EState *estate, bool newIndex);
  
  /*
   * prototypes from functions in execReplication.c
   */
  extern bool RelationFindReplTupleByIndex(Relation rel, Oid idxoid,
  										 LockTupleMode lockmode,
  										 TupleTableSlot *searchslot,
  										 TupleTableSlot *outslot);
  extern bool RelationFindReplTupleSeq(Relation rel, LockTupleMode lockmode,
  									 TupleTableSlot *searchslot, TupleTableSlot *outslot);
  
  extern void ExecSimpleRelationInsert(ResultRelInfo *resultRelInfo,
  									 EState *estate, TupleTableSlot *slot);
  extern void ExecSimpleRelationUpdate(ResultRelInfo *resultRelInfo,
  									 EState *estate, EPQState *epqstate,
  									 TupleTableSlot *searchslot, TupleTableSlot *slot);
  extern void ExecSimpleRelationDelete(ResultRelInfo *resultRelInfo,
  									 EState *estate, EPQState *epqstate,
  									 TupleTableSlot *searchslot);
  extern void CheckCmdReplicaIdentity(Relation rel, CmdType cmd);
  
  extern void CheckSubscriptionRelkind(char relkind, const char *nspname,
  									 const char *relname);
  
  #endif							/* EXECUTOR_H  */
  