178 lines
6.1 KiB
C
178 lines
6.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* executor.h--
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* support for the POSTGRES executor module
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: executor.h,v 1.25 1998/09/01 04:35:49 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef EXECUTOR_H
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#define EXECUTOR_H
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#include <catalog/pg_index.h>
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#include <storage/bufmgr.h>
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#include <access/itup.h>
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#include <stdio.h>
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#include <executor/execdesc.h>
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/* ----------------
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* TupIsNull
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*
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* This is used mainly to detect when there are no more
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* tuples to process.
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* ----------------
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*/
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/* return: true if tuple in slot is NULL, slot is slot to test */
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#define TupIsNull(slot) \
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( \
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((slot) == NULL) ? \
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true \
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: \
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( \
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((slot)->val == NULL) ? \
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true \
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: \
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false \
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) \
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)
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/* --------------------------------
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* ExecIncrSlotBufferRefcnt
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*
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* When we pass around buffers in the tuple table, we have to
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* be careful to increment reference counts appropriately.
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* This is used mainly in the mergejoin code.
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* --------------------------------
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*/
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#define ExecIncrSlotBufferRefcnt(slot) \
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( \
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BufferIsValid((slot)->ttc_buffer) ? \
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IncrBufferRefCount((slot)->ttc_buffer) \
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: (void)NULL \
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)
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/*
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* prototypes from functions in execAmi.c
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*/
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extern void ExecOpenScanR(Oid relOid, int nkeys, ScanKey skeys, bool isindex,
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ScanDirection dir, Snapshot snapshot,
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Relation *returnRelation, Pointer *returnScanDesc);
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extern void ExecCloseR(Plan *node);
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extern void ExecReScan(Plan *node, ExprContext *exprCtxt, Plan *parent);
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extern HeapScanDesc ExecReScanR(Relation relDesc, HeapScanDesc scanDesc,
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ScanDirection direction, int nkeys, ScanKey skeys);
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extern void ExecMarkPos(Plan *node);
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extern void ExecRestrPos(Plan *node);
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extern Relation ExecCreatR(TupleDesc tupType, Oid relationOid);
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/*
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* prototypes from functions in execJunk.c
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*/
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extern JunkFilter *ExecInitJunkFilter(List *targetList);
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extern bool ExecGetJunkAttribute(JunkFilter *junkfilter, TupleTableSlot *slot,
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char *attrName, Datum *value, bool *isNull);
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extern HeapTuple ExecRemoveJunk(JunkFilter *junkfilter, TupleTableSlot *slot);
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/*
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* prototypes from functions in execMain.c
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*/
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extern TupleDesc ExecutorStart(QueryDesc *queryDesc, EState *estate);
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extern TupleTableSlot *ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count);
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extern void ExecutorEnd(QueryDesc *queryDesc, EState *estate);
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extern HeapTuple ExecConstraints(char *caller, Relation rel, HeapTuple tuple);
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/*
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* prototypes from functions in execProcnode.c
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*/
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extern bool ExecInitNode(Plan *node, EState *estate, Plan *parent);
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extern TupleTableSlot *ExecProcNode(Plan *node, Plan *parent);
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extern int ExecCountSlotsNode(Plan *node);
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extern void ExecEndNode(Plan *node, Plan *parent);
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/*
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* prototypes from functions in execQual.c
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*/
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extern bool execConstByVal;
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extern int execConstLen;
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extern Datum ExecExtractResult(TupleTableSlot *slot, AttrNumber attnum,
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bool *isNull);
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extern Datum ExecEvalParam(Param *expression, ExprContext *econtext,
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bool *isNull);
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/* stop here */
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extern char *GetAttributeByNum(TupleTableSlot *slot, AttrNumber attrno,
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bool *isNull);
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extern char *GetAttributeByName(TupleTableSlot *slot, char *attname, bool *isNull);
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extern Datum ExecEvalExpr(Node *expression, ExprContext *econtext, bool *isNull,
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bool *isDone);
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extern bool ExecQual(List *qual, ExprContext *econtext);
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extern int ExecTargetListLength(List *targetlist);
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extern TupleTableSlot *ExecProject(ProjectionInfo *projInfo, bool *isDone);
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/*
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* prototypes from functions in execScan.c
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*/
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extern TupleTableSlot *ExecScan(Scan *node, TupleTableSlot *(*accessMtd) ());
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/*
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* prototypes from functions in execTuples.c
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*/
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extern TupleTable ExecCreateTupleTable(int initialSize);
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extern void ExecDestroyTupleTable(TupleTable table, bool shouldFree);
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extern TupleTableSlot *ExecAllocTableSlot(TupleTable table);
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extern TupleTableSlot *ExecStoreTuple(HeapTuple tuple,
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TupleTableSlot *slot,
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Buffer buffer,
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bool shouldFree);
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extern TupleTableSlot *ExecClearTuple(TupleTableSlot *slot);
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extern bool ExecSetSlotPolicy(TupleTableSlot *slot, bool shouldFree);
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extern TupleDesc ExecSetSlotDescriptor(TupleTableSlot *slot,
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TupleDesc tupdesc);
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extern void ExecSetSlotDescriptorIsNew(TupleTableSlot *slot, bool isNew);
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extern void ExecInitResultTupleSlot(EState *estate, CommonState *commonstate);
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extern void ExecInitScanTupleSlot(EState *estate,
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CommonScanState *commonscanstate);
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extern void ExecInitMarkedTupleSlot(EState *estate, MergeJoinState *mergestate);
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extern void ExecInitOuterTupleSlot(EState *estate, HashJoinState *hashstate);
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extern TupleDesc ExecGetTupType(Plan *node);
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extern TupleDesc ExecTypeFromTL(List *targetList);
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extern void SetChangedParamList(Plan *node, List *newchg);
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/*
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* prototypes from functions in execTuples.c
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*/
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extern void ResetTupleCount(void);
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extern void ExecAssignNodeBaseInfo(EState *estate, CommonState *basenode,
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Plan *parent);
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extern void ExecAssignExprContext(EState *estate, CommonState *commonstate);
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extern void ExecAssignResultType(CommonState *commonstate,
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TupleDesc tupDesc);
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extern void ExecAssignResultTypeFromOuterPlan(Plan *node,
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CommonState *commonstate);
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extern void ExecAssignResultTypeFromTL(Plan *node, CommonState *commonstate);
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extern TupleDesc ExecGetResultType(CommonState *commonstate);
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extern void ExecAssignProjectionInfo(Plan *node, CommonState *commonstate);
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extern void ExecFreeProjectionInfo(CommonState *commonstate);
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extern TupleDesc ExecGetScanType(CommonScanState *csstate);
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extern void ExecAssignScanType(CommonScanState *csstate,
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TupleDesc tupDesc);
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extern void ExecAssignScanTypeFromOuterPlan(Plan *node,
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CommonScanState *csstate);
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extern Form_pg_attribute ExecGetTypeInfo(Relation relDesc);
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extern void ExecOpenIndices(Oid resultRelationOid,
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RelationInfo *resultRelationInfo);
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extern void ExecCloseIndices(RelationInfo *resultRelationInfo);
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extern void ExecInsertIndexTuples(TupleTableSlot *slot, ItemPointer tupleid,
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EState *estate, bool is_update);
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#endif /* EXECUTOR_H */
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