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Fix handling of functions with non-attribute first argument in WHERE

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clauses.
This commit is contained in:
Vadim B. Mikheev 1997-09-25 12:48:15 +00:00
parent c42f7f1460
commit 6be30fb524
1 changed files with 7 additions and 17 deletions

24
src/backend/optimizer/util/clauses.c

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/clauses.c,v 1.11 1997/09/08 21:45:47 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/clauses.c,v 1.12 1997/09/25 12:48:15 vadim Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -641,30 +641,20 @@ get_relattval(Node *clause,
is_funcclause((Node *) left) &&
IsA(right, Const))
{
List *args = ((Expr *) left)->args;
*relid = ((Var *) lfirst(args))->varno;
List *vars = pull_var_clause((Node*)left);
*relid = ((Var *) lfirst(vars))->varno;
*attno = InvalidAttrNumber;
*constval = ((Const *) right)->constvalue;
*flag = (_SELEC_CONSTANT_RIGHT_ | _SELEC_IS_CONSTANT_);
/*
* XXX both of these func clause handling if's seem wrong to me.
* they assume that the first argument is the Var. It could not
* handle (for example) f(1, emp.name). I think I may have been
* assuming no constants in functional index scans when I
* implemented this originally (still currently true). -mer 10 Aug
* 1992
*/
}
else if (is_opclause(clause) &&
is_funcclause((Node *) right) &&
IsA(left, Const))
{
List *args = ((Expr *) right)->args;
*relid = ((Var *) lfirst(args))->varno;
List *vars = pull_var_clause((Node*)right);
*relid = ((Var *) lfirst(vars))->varno;
*attno = InvalidAttrNumber;
*constval = ((Const *) left)->constvalue;
*flag = (_SELEC_IS_CONSTANT_);