NULLIF and CASE return different result
---------------------------------------
Key: DERBY-5556
URL: https://issues.apache.org/jira/browse/DERBY-5556
Project: Derby
Issue Type: Bug
Components: SQL
Affects Versions: 10.8.1.2
Environment: $ uname -a
Linux hleemus 3.1.4-1-ARCH #1 SMP PREEMPT Tue Nov 29 08:55:45 CET 2011 x86_64
AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ AuthenticAMD GNU/Linux
$ java -version
java version "1.6.0_22"
Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
Java HotSpot(TM) 64-Bit Server VM (build 17.1-b03, mixed mode)
$ java -Dij.database=jdbc:derby:dbase -classpath
/home/hleem/.m2/repository/org/apache/derby/derbytools/10.8.1.2/derbytools-10.8.1.2.jar:/home/hleem/.m2/repository/org/apache/derby/derby/10.8.1.2/derby-10.8.1.2.jar
org.apache.derby.tools.ij
ij version 10.8
CONNECTION0* - jdbc:derby:dbase
* = current connection
ij> select pr_parent FROM SDB.PARAMS;
PR_PARENT
-----------
10
10
10
NULL
4 rows selected
ij> select case when pr_parent is null then 0 else pr_parent end FROM
SDB.PARAMS;
1
-----------
10
10
10
0
4 rows selected
ij> select nullif(pr_parent,0) FROM SDB.PARAMS;
1
-----------
10
10
10
NULL
4 rows selected
ij> exit;
$
Reporter: hleem
NULLIF and CASE return different result with null INTEGER value.
'pr_parent' in query is INTEGER type.
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