mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-09 03:29:22 +02:00
thing when there are multiple result relations. Formerly, during something like 'UPDATE foo*', foo's constraints and *only* foo's constraints would be applied to all foo's children. Wrong-o ...
153 lines
5.7 KiB
C
153 lines
5.7 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* executor.h
|
|
* support for the POSTGRES executor module
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* $Id: executor.h,v 1.47 2000/08/06 04:26:27 tgl Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef EXECUTOR_H
|
|
#define EXECUTOR_H
|
|
|
|
#include "executor/execdesc.h"
|
|
|
|
/* ----------------
|
|
* TupIsNull
|
|
*
|
|
* This is used mainly to detect when there are no more
|
|
* tuples to process.
|
|
* ----------------
|
|
*/
|
|
/* return: true if tuple in slot is NULL, slot is slot to test */
|
|
#define TupIsNull(slot) \
|
|
((slot) == NULL || (slot)->val == NULL)
|
|
|
|
/*
|
|
* prototypes from functions in execAmi.c
|
|
*/
|
|
extern void ExecOpenScanR(Oid relOid, int nkeys, ScanKey skeys, bool isindex,
|
|
ScanDirection dir, Snapshot snapshot,
|
|
Relation *returnRelation, Pointer *returnScanDesc);
|
|
extern void ExecCloseR(Plan *node);
|
|
extern void ExecReScan(Plan *node, ExprContext *exprCtxt, Plan *parent);
|
|
extern HeapScanDesc ExecReScanR(Relation relDesc, HeapScanDesc scanDesc,
|
|
ScanDirection direction, int nkeys, ScanKey skeys);
|
|
extern void ExecMarkPos(Plan *node);
|
|
extern void ExecRestrPos(Plan *node);
|
|
|
|
/*
|
|
* prototypes from functions in execJunk.c
|
|
*/
|
|
extern JunkFilter *ExecInitJunkFilter(List *targetList, TupleDesc tupType);
|
|
extern bool ExecGetJunkAttribute(JunkFilter *junkfilter, TupleTableSlot *slot,
|
|
char *attrName, Datum *value, bool *isNull);
|
|
extern HeapTuple ExecRemoveJunk(JunkFilter *junkfilter, TupleTableSlot *slot);
|
|
|
|
|
|
/*
|
|
* prototypes from functions in execMain.c
|
|
*/
|
|
extern TupleDesc ExecutorStart(QueryDesc *queryDesc, EState *estate);
|
|
extern TupleTableSlot *ExecutorRun(QueryDesc *queryDesc, EState *estate,
|
|
int feature, Node *limoffset, Node *limcount);
|
|
extern void ExecutorEnd(QueryDesc *queryDesc, EState *estate);
|
|
extern void ExecConstraints(char *caller, Relation rel,
|
|
TupleTableSlot *slot, EState *estate);
|
|
extern TupleTableSlot *EvalPlanQual(EState *estate, Index rti,
|
|
ItemPointer tid);
|
|
|
|
/*
|
|
* prototypes from functions in execProcnode.c
|
|
*/
|
|
extern bool ExecInitNode(Plan *node, EState *estate, Plan *parent);
|
|
extern TupleTableSlot *ExecProcNode(Plan *node, Plan *parent);
|
|
extern int ExecCountSlotsNode(Plan *node);
|
|
extern void ExecEndNode(Plan *node, Plan *parent);
|
|
|
|
/*
|
|
* prototypes from functions in execQual.c
|
|
*/
|
|
extern Datum ExecEvalParam(Param *expression, ExprContext *econtext,
|
|
bool *isNull);
|
|
extern char *GetAttributeByNum(TupleTableSlot *slot, AttrNumber attrno,
|
|
bool *isNull);
|
|
extern char *GetAttributeByName(TupleTableSlot *slot, char *attname,
|
|
bool *isNull);
|
|
extern Datum ExecEvalExpr(Node *expression, ExprContext *econtext,
|
|
bool *isNull, bool *isDone);
|
|
extern Datum ExecEvalExprSwitchContext(Node *expression, ExprContext *econtext,
|
|
bool *isNull, bool *isDone);
|
|
extern bool ExecQual(List *qual, ExprContext *econtext, bool resultForNull);
|
|
extern int ExecTargetListLength(List *targetlist);
|
|
extern TupleTableSlot *ExecProject(ProjectionInfo *projInfo, bool *isDone);
|
|
|
|
/*
|
|
* prototypes from functions in execScan.c
|
|
*/
|
|
typedef TupleTableSlot *(*ExecScanAccessMtd) (Scan *node);
|
|
|
|
extern TupleTableSlot *ExecScan(Scan *node, ExecScanAccessMtd accessMtd);
|
|
|
|
/*
|
|
* prototypes from functions in execTuples.c
|
|
*/
|
|
extern TupleTable ExecCreateTupleTable(int initialSize);
|
|
extern void ExecDropTupleTable(TupleTable table, bool shouldFree);
|
|
extern TupleTableSlot *ExecAllocTableSlot(TupleTable table);
|
|
extern TupleTableSlot *ExecStoreTuple(HeapTuple tuple,
|
|
TupleTableSlot *slot,
|
|
Buffer buffer,
|
|
bool shouldFree);
|
|
extern TupleTableSlot *ExecClearTuple(TupleTableSlot *slot);
|
|
extern TupleDesc ExecSetSlotDescriptor(TupleTableSlot *slot,
|
|
TupleDesc tupdesc);
|
|
extern void ExecSetSlotDescriptorIsNew(TupleTableSlot *slot, bool isNew);
|
|
extern void ExecInitResultTupleSlot(EState *estate, CommonState *commonstate);
|
|
extern void ExecInitScanTupleSlot(EState *estate,
|
|
CommonScanState *commonscanstate);
|
|
extern void ExecInitOuterTupleSlot(EState *estate, HashJoinState *hashstate);
|
|
|
|
extern TupleDesc ExecGetTupType(Plan *node);
|
|
extern TupleDesc ExecTypeFromTL(List *targetList);
|
|
extern void SetChangedParamList(Plan *node, List *newchg);
|
|
|
|
/*
|
|
* prototypes from functions in execUtils.c
|
|
*/
|
|
extern void ResetTupleCount(void);
|
|
extern void ExecAssignExprContext(EState *estate, CommonState *commonstate);
|
|
extern void ExecAssignResultType(CommonState *commonstate,
|
|
TupleDesc tupDesc);
|
|
extern void ExecAssignResultTypeFromOuterPlan(Plan *node,
|
|
CommonState *commonstate);
|
|
extern void ExecAssignResultTypeFromTL(Plan *node, CommonState *commonstate);
|
|
extern TupleDesc ExecGetResultType(CommonState *commonstate);
|
|
extern void ExecAssignProjectionInfo(Plan *node, CommonState *commonstate);
|
|
extern void ExecFreeProjectionInfo(CommonState *commonstate);
|
|
extern void ExecFreeExprContext(CommonState *commonstate);
|
|
extern TupleDesc ExecGetScanType(CommonScanState *csstate);
|
|
extern void ExecAssignScanType(CommonScanState *csstate,
|
|
TupleDesc tupDesc);
|
|
extern void ExecAssignScanTypeFromOuterPlan(Plan *node,
|
|
CommonScanState *csstate);
|
|
extern Form_pg_attribute ExecGetTypeInfo(Relation relDesc);
|
|
|
|
extern ExprContext *MakeExprContext(TupleTableSlot *slot,
|
|
MemoryContext queryContext);
|
|
extern void FreeExprContext(ExprContext *econtext);
|
|
|
|
#define ResetExprContext(econtext) \
|
|
MemoryContextReset((econtext)->ecxt_per_tuple_memory)
|
|
|
|
extern void ExecOpenIndices(RelationInfo *resultRelationInfo);
|
|
extern void ExecCloseIndices(RelationInfo *resultRelationInfo);
|
|
extern void ExecInsertIndexTuples(TupleTableSlot *slot, ItemPointer tupleid,
|
|
EState *estate, bool is_update);
|
|
|
|
#endif /* EXECUTOR_H */
|