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Back-patch fix for NULL condition in CASE.

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This commit is contained in:
Tom Lane
1999-09-18 23:30:05 +00:00
parent bed8cf4d83
commit 7fe22f5c8b
1 changed files with 4 additions and 3 deletions
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7
src/backend/executor/execQual.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execQual.c,v 1.53 1999/06/12 19:22:40 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execQual.c,v 1.53.2.1 1999/09/18 23:30:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1128,9 +1128,10 @@ ExecEvalCase(CaseExpr *caseExpr, ExprContext *econtext, bool *isNull)
/*
* if we have a true test, then we return the result, since the
* case statement is satisfied.
* case statement is satisfied. A NULL result from the test is
* not considered true.
*/
if (DatumGetInt32(const_value) != 0)
if (DatumGetInt32(const_value) != 0 && ! *isNull)
{
const_value = ExecEvalExpr((Node *) wclause->result,
econtext,