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Fix overly enthusiastic Assert introduced in 8.1: it's expecting a

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CaseTestExpr, but forgot that the optimizer is sometimes able to replace
CaseTestExpr by Const.
This commit is contained in:
Tom Lane 2006-10-01 17:23:38 +00:00
parent 87cd901cba
commit 514ce7a331
1 changed files with 7 additions and 3 deletions
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10
src/backend/utils/adt/ruleutils.c
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@ -2,7 +2,7 @@
* ruleutils.c - Functions to convert stored expressions/querytrees
* back to source text
*
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.232 2006/08/21 00:57:25 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.233 2006/10/01 17:23:38 tgl Exp $
**********************************************************************/
#include "postgres.h"
@ -3584,14 +3584,18 @@ get_rule_expr(Node *node, deparse_context *context,
* the optimizer's simplify_boolean_equality() may
* have reduced this to just "CaseTestExpr" or
* "NOT CaseTestExpr", for which we have to show
* "TRUE" or "FALSE".
* "TRUE" or "FALSE". Also, depending on context
* the original CaseTestExpr might have been reduced
* to a Const (but we won't see "WHEN Const").
*/
if (IsA(w, OpExpr))
{
Node *rhs;
Assert(IsA(linitial(((OpExpr *) w)->args),
CaseTestExpr));
CaseTestExpr) ||
IsA(linitial(((OpExpr *) w)->args),
Const));
rhs = (Node *) lsecond(((OpExpr *) w)->args);
get_rule_expr(rhs, context, false);
}