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Phase 3 of read-only-plans project: ExecInitExpr now builds expression

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execution state trees, and ExecEvalExpr takes an expression state tree
not an expression plan tree.  The plan tree is now read-only as far as
the executor is concerned.  Next step is to begin actually exploiting
this property.
This commit is contained in:
Tom Lane
2002-12-13 19:46:01 +00:00
parent 77b7a740f9
commit 3a4f7dde16
49 changed files with 993 additions and 815 deletions
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19
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 1.81 2002/12/05 15:50:36 tgl Exp $
* $Id: executor.h,v 1.82 2002/12/13 19:45:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -73,26 +73,27 @@ extern TupleDesc ExecGetTupType(PlanState *node);
/*
* prototypes from functions in execQual.c
*/
extern Datum ExecEvalParam(Param *expression, ExprContext *econtext,
bool *isNull);
extern Datum GetAttributeByNum(TupleTableSlot *slot, AttrNumber attrno,
bool *isNull);
extern Datum GetAttributeByName(TupleTableSlot *slot, char *attname,
bool *isNull);
extern Datum ExecMakeFunctionResult(FunctionCachePtr fcache,
List *arguments,
extern void init_fcache(Oid foid, FuncExprState *fcache,
MemoryContext fcacheCxt);
extern Datum ExecMakeFunctionResult(FuncExprState *fcache,
ExprContext *econtext,
bool *isNull,
ExprDoneCond *isDone);
extern Tuplestorestate *ExecMakeTableFunctionResult(Node *funcexpr,
extern Tuplestorestate *ExecMakeTableFunctionResult(ExprState *funcexpr,
ExprContext *econtext,
TupleDesc expectedDesc,
TupleDesc *returnDesc);
extern Datum ExecEvalExpr(Node *expression, ExprContext *econtext,
extern Datum ExecEvalExpr(ExprState *expression, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone);
extern Datum ExecEvalExprSwitchContext(Node *expression, ExprContext *econtext,
extern Datum ExecEvalExprSwitchContext(ExprState *expression, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone);
extern Node *ExecInitExpr(Node *node, PlanState *parent);
extern ExprState *ExecInitExpr(Expr *node, PlanState *parent);
extern SubPlanExprState *ExecInitExprInitPlan(SubPlanExpr *node,
PlanState *parent);
extern bool ExecQual(List *qual, ExprContext *econtext, bool resultForNull);
extern int ExecTargetListLength(List *targetlist);
extern int ExecCleanTargetListLength(List *targetlist);