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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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8
src/backend/optimizer/path/indxpath.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.127 2002/12/12 15:49:28 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.128 2002/12/13 19:45:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1124,6 +1124,7 @@ pred_test_simple_clause(Expr *predicate, Node *clause)
clause_strategy,
test_strategy;
Expr *test_expr;
ExprState *test_exprstate;
Datum test_result;
bool isNull;
Relation relation;
@ -1274,9 +1275,10 @@ pred_test_simple_clause(Expr *predicate, Node *clause)
(Expr *) clause_const,
(Expr *) pred_const);
set_opfuncid((OpExpr *) test_expr);
test_exprstate = ExecInitExpr(test_expr, NULL);
econtext = MakeExprContext(NULL, TransactionCommandContext);
test_result = ExecEvalExprSwitchContext((Node *) test_expr, econtext,
econtext = MakeExprContext(NULL, CurrentMemoryContext);
test_result = ExecEvalExprSwitchContext(test_exprstate, econtext,
&isNull, NULL);
FreeExprContext(econtext);