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From "Yip Ng (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-2014) NullPointerException with NULLIF in GROUP BY clause
Date Sat, 28 Oct 2006 18:41:16 GMT
NullPointerException with NULLIF in GROUP BY clause
---------------------------------------------------

                 Key: DERBY-2014
                 URL: http://issues.apache.org/jira/browse/DERBY-2014
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.2.1.6, 10.3.0.0
         Environment: Any
            Reporter: Yip Ng


A NPE occurs when NULLIF is used in the GROUP BY clause.

ij> create table t1 (c1 int);
0 rows inserted/updated/deleted
ij> insert into t1 values 1,2,2,3;
4 rows inserted/updated/deleted
ij> select nullif(c1,c1) from t1 group by nullif(c1,c1);
ERROR XJ001: Java exception: ': java.lang.NullPointerException'.

Stacktrace:

java.lang.NullPointerException
	at org.apache.derby.impl.sql.compile.ConstantNode.isEquivalent(ConstantNode.java:285)
	at org.apache.derby.impl.sql.compile.CastNode.isEquivalent(CastNode.java:1044)
	at org.apache.derby.impl.sql.compile.ConditionalNode.isEquivalent(ConditionalNode.java:518)
	at org.apache.derby.impl.sql.compile.GroupByList.findGroupingColumn(GroupByList.java:244)
	at org.apache.derby.impl.sql.compile.VerifyAggregateExpressionsVisitor.skipChildren(VerifyAggregateExpressionsVisitor.java:146)
	at org.apache.derby.impl.sql.compile.ConditionalNode.accept(ConditionalNode.java:484)
	at org.apache.derby.impl.sql.compile.ResultColumn.accept(ResultColumn.java:1515)
	at org.apache.derby.impl.sql.compile.QueryTreeNodeVector.accept(QueryTreeNodeVector.java:159)
	at org.apache.derby.impl.sql.compile.SelectNode.bindExpressions(SelectNode.java:619)
	at org.apache.derby.impl.sql.compile.FromSubquery.bindExpressions(FromSubquery.java:262)
	at org.apache.derby.impl.sql.compile.FromList.bindExpressions(FromList.java:337)
	at org.apache.derby.impl.sql.compile.SelectNode.bindExpressions(SelectNode.java:500)
	at org.apache.derby.impl.sql.compile.DMLStatementNode.bindExpressions(DMLStatementNode.java:249)
	at org.apache.derby.impl.sql.compile.DMLStatementNode.bind(DMLStatementNode.java:162)
	at org.apache.derby.impl.sql.compile.CursorNode.bind(CursorNode.java:253)
	at org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:345)
	at org.apache.derby.impl.sql.GenericStatement.prepare(GenericStatement.java:119)
	at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(GenericLanguageConnectionContext.java:745)
	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:568)
	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:517)
	at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:321)
	at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:517)
	at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(utilMain.java:370)
	at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:268)
	at org.apache.derby.impl.tools.ij.Main.go(Main.java:204)
	at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:170)
	at org.apache.derby.impl.tools.ij.Main14.main(Main14.java:56)
	at org.apache.derby.tools.ij.main(ij.java:71)

sysinfo:

------------------ Java Information ------------------
Java Version:    1.4.2_12
Java Vendor:     Sun Microsystems Inc.
Java home:       C:\jdk142\jre
Java classpath:  classes;.
OS name:         Windows XP
OS architecture: x86
OS version:      5.1
Java user name:  yip
Java user home:  C:\Documents and Settings\Administrator
Java user dir:   C:\derby\trunk
java.specification.name: Java Platform API Specification
java.specification.version: 1.4
--------- Derby Information --------
JRE - JDBC: J2SE 1.4.2 - JDBC 3.0
[C:\derby\trunk\classes] 10.3.0.0 alpha - (1)
------------------------------------------------------
----------------- Locale Information -----------------
Current Locale :  [English/United States [en_US]]
Found support for locale: [de_DE]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [es]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [fr]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [it]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [ja_JP]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [ko_KR]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [pt_BR]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [zh_CN]
         version: 10.3.0.0 alpha - (1)
Found support for locale: [zh_TW]
         version: 10.3.0.0 alpha - (1)
------------------------------------------------------

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