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  1. Derby
  2. DERBY-2014

NullPointerException with NULLIF in GROUP BY clause

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.2.1.6, 10.3.1.4
    • Fix Version/s: 10.2.2.0, 10.3.1.4
    • Component/s: SQL
    • Labels:
      None
    • Environment:
      Any

      Description

      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)
      ------------------------------------------------------

        Attachments

        1. derby2014-trunk-diff03.txt
          12 kB
          Yip Ng
        2. derby2014-trunk-stat03.txt
          0.5 kB
          Yip Ng
        3. derby2014-trunk-diff02.txt
          11 kB
          Yip Ng
        4. derby2014-trunk-stat02.txt
          0.5 kB
          Yip Ng
        5. derby2014-trunk-diff01.txt
          6 kB
          Yip Ng
        6. derby2014-trunk-stat01.txt
          0.3 kB
          Yip Ng

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              • Assignee:
                yipng Yip Ng
                Reporter:
                yipng Yip Ng
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                Dates

                • Created:
                  Updated:
                  Resolved: