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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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12
src/backend/commands/prepare.c
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@ -6,7 +6,7 @@
* Copyright (c) 2002, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.9 2002/12/05 15:50:30 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.10 2002/12/13 19:45:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -15,6 +15,7 @@
#include "commands/prepare.h"
#include "executor/executor.h"
#include "utils/guc.h"
#include "optimizer/planmain.h"
#include "optimizer/planner.h"
#include "rewrite/rewriteHandler.h"
#include "tcop/pquery.h"
@ -110,17 +111,22 @@ ExecuteQuery(ExecuteStmt *stmt, CommandDest outputDest)
{
int nargs = length(entry->argtype_list);
int i = 0;
List *exprstates;
ExprContext *econtext = MakeExprContext(NULL, CurrentMemoryContext);
/* Parser should have caught this error, but check */
if (nargs != length(stmt->params))
elog(ERROR, "ExecuteQuery: wrong number of arguments");
fix_opfuncids((Node *) stmt->params);
exprstates = (List *) ExecInitExpr((Expr *) stmt->params, NULL);
paramLI = (ParamListInfo) palloc0((nargs + 1) * sizeof(ParamListInfoData));
foreach(l, stmt->params)
foreach(l, exprstates)
{
Node *n = lfirst(l);
ExprState *n = lfirst(l);
bool isNull;
paramLI[i].value = ExecEvalExprSwitchContext(n,