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Phase 1 of read-only-plans project: cause executor state nodes to point

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to plan nodes, not vice-versa.  All executor state nodes now inherit from
struct PlanState.  Copying of plan trees has been simplified by not
storing a list of SubPlans in Plan nodes (eliminating duplicate links).
The executor still needs such a list, but it can build it during
ExecutorStart since it has to scan the plan tree anyway.
No initdb forced since no stored-on-disk structures changed, but you
will need a full recompile because of node-numbering changes.
This commit is contained in:
Tom Lane
2002-12-05 15:50:39 +00:00
parent 0f3b83edfa
commit 1fd0c59e25
71 changed files with 3032 additions and 3758 deletions
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61
src/include/executor/executor.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: executor.h,v 1.80 2002/12/01 20:27:32 tgl Exp $
* $Id: executor.h,v 1.81 2002/12/05 15:50:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -16,6 +16,7 @@
#include "executor/execdesc.h"
/* ----------------
* TupIsNull
*
@ -30,9 +31,9 @@
/*
* prototypes from functions in execAmi.c
*/
extern void ExecReScan(Plan *node, ExprContext *exprCtxt, Plan *parent);
extern void ExecMarkPos(Plan *node);
extern void ExecRestrPos(Plan *node);
extern void ExecReScan(PlanState *node, ExprContext *exprCtxt);
extern void ExecMarkPos(PlanState *node);
extern void ExecRestrPos(PlanState *node);
extern bool ExecSupportsMarkRestore(NodeTag plantype);
/*
@ -49,10 +50,12 @@ 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,
extern void ExecutorStart(QueryDesc *queryDesc);
extern TupleTableSlot *ExecutorRun(QueryDesc *queryDesc,
ScanDirection direction, long count);
extern void ExecutorEnd(QueryDesc *queryDesc, EState *estate);
extern void ExecutorEnd(QueryDesc *queryDesc);
extern EState *CreateExecutorState(void);
extern void ExecCheckRTPerms(List *rangeTable, CmdType operation);
extern void ExecConstraints(const char *caller, ResultRelInfo *resultRelInfo,
TupleTableSlot *slot, EState *estate);
extern TupleTableSlot *EvalPlanQual(EState *estate, Index rti,
@ -61,11 +64,11 @@ extern TupleTableSlot *EvalPlanQual(EState *estate, Index rti,
/*
* prototypes from functions in execProcnode.c
*/
extern bool ExecInitNode(Plan *node, EState *estate, Plan *parent);
extern TupleTableSlot *ExecProcNode(Plan *node, Plan *parent);
extern PlanState *ExecInitNode(Plan *node, EState *estate);
extern TupleTableSlot *ExecProcNode(PlanState *node);
extern int ExecCountSlotsNode(Plan *node);
extern void ExecEndNode(Plan *node, Plan *parent);
extern TupleDesc ExecGetTupType(Plan *node);
extern void ExecEndNode(PlanState *node);
extern TupleDesc ExecGetTupType(PlanState *node);
/*
* prototypes from functions in execQual.c
@ -89,6 +92,7 @@ extern Datum ExecEvalExpr(Node *expression, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone);
extern Datum ExecEvalExprSwitchContext(Node *expression, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone);
extern Node *ExecInitExpr(Node *node, PlanState *parent);
extern bool ExecQual(List *qual, ExprContext *econtext, bool resultForNull);
extern int ExecTargetListLength(List *targetlist);
extern int ExecCleanTargetListLength(List *targetlist);
@ -98,9 +102,9 @@ extern TupleTableSlot *ExecProject(ProjectionInfo *projInfo,
/*
* prototypes from functions in execScan.c
*/
typedef TupleTableSlot *(*ExecScanAccessMtd) (Scan *node);
typedef TupleTableSlot *(*ExecScanAccessMtd) (ScanState *node);
extern TupleTableSlot *ExecScan(Scan *node, ExecScanAccessMtd accessMtd);
extern TupleTableSlot *ExecScan(ScanState *node, ExecScanAccessMtd accessMtd);
/*
* prototypes from functions in execTuples.c
@ -117,14 +121,13 @@ extern TupleTableSlot *ExecClearTuple(TupleTableSlot *slot);
extern void ExecSetSlotDescriptor(TupleTableSlot *slot,
TupleDesc tupdesc, bool shouldFree);
extern void ExecSetSlotDescriptorIsNew(TupleTableSlot *slot, bool isNew);
extern void ExecInitResultTupleSlot(EState *estate, CommonState *commonstate);
extern void ExecInitScanTupleSlot(EState *estate,
CommonScanState *commonscanstate);
extern void ExecInitResultTupleSlot(EState *estate, PlanState *planstate);
extern void ExecInitScanTupleSlot(EState *estate, ScanState *scanstate);
extern TupleTableSlot *ExecInitExtraTupleSlot(EState *estate);
extern TupleTableSlot *ExecInitNullTupleSlot(EState *estate,
TupleDesc tupType);
extern TupleDesc ExecTypeFromTL(List *targetList, bool hasoid);
extern void SetChangedParamList(Plan *node, List *newchg);
extern void SetChangedParamList(PlanState *node, List *newchg);
typedef struct TupOutputState
{
@ -155,21 +158,19 @@ extern void end_tup_output(TupOutputState *tstate);
* prototypes from functions in execUtils.c
*/
extern void ResetTupleCount(void);
extern void ExecAssignExprContext(EState *estate, CommonState *commonstate);
extern void ExecAssignResultType(CommonState *commonstate,
extern void ExecAssignExprContext(EState *estate, PlanState *planstate);
extern void ExecAssignResultType(PlanState *planstate,
TupleDesc tupDesc, bool shouldFree);
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,
extern void ExecAssignResultTypeFromOuterPlan(PlanState *planstate);
extern void ExecAssignResultTypeFromTL(PlanState *planstate);
extern TupleDesc ExecGetResultType(PlanState *planstate);
extern void ExecAssignProjectionInfo(PlanState *planstate);
extern void ExecFreeProjectionInfo(PlanState *planstate);
extern void ExecFreeExprContext(PlanState *planstate);
extern TupleDesc ExecGetScanType(ScanState *scanstate);
extern void ExecAssignScanType(ScanState *scanstate,
TupleDesc tupDesc, bool shouldFree);
extern void ExecAssignScanTypeFromOuterPlan(Plan *node,
CommonScanState *csstate);
extern void ExecAssignScanTypeFromOuterPlan(ScanState *scanstate);
extern ExprContext *MakeExprContext(TupleTableSlot *slot,
MemoryContext queryContext);