[jira] [Created] (DERBY-6863) NPE when multiple values are contained in an IN statement within a CASE statement used in a GROUP BY

[Peter Damen (JIRA)]

Peter Damen created DERBY-6863:
----------------------------------

             Summary: NPE when multiple values are contained in an IN statement 
within a CASE statement used in a GROUP BY
                 Key: DERBY-6863
                 URL: https://issues.apache.org/jira/browse/DERBY-6863
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.12.1.1
         Environment: Java 8, Mint Linux, 24G, Used within an in-memory table
            Reporter: Peter Damen


An IN statement within a CASE statement within a GROUP BY, that contains more 
than one element will cause a NPE.

Reproduction Steps:

======== DATA ============

CREATE TABLE Test (
       Region VARCHAR(20),
       Cost INTEGER
);

INSERT INTO Test VALUES ('Australia', 45);
INSERT INTO Test VALUES ('Asia', 22);
INSERT INTO Test VALUES ('North America', 33);
INSERT INTO Test VALUES ('South America', 55);
INSERT INTO Test VALUES ('Europe', 44);

======= SQL WORKS ===========

SELECT DISTINCT
   CASE
      WHEN 1 = 0 THEN "REGION"
      WHEN "REGION" IN ('Asia') THEN 'A'
      ELSE "REGION"
   END,
   SUM("COST")
FROM TEST
GROUP BY 
   CASE
      WHEN 1 = 0 THEN "REGION"
      WHEN "REGION" IN ('Asia') THEN 'A'
      ELSE "REGION"
   END

============ FAILS ===================

   SELECT DISTINCT
      CASE
         WHEN 1 = 0 THEN "REGION"
         WHEN "REGION" IN ('Asia', 'Australia') THEN 'A'
         ELSE "REGION"
      END,
      SUM("COST")
   FROM TEST
   GROUP BY 
      CASE
         WHEN 1 = 0 THEN "REGION"
         WHEN "REGION" IN ('Asia','Australia') THEN 'A'
         ELSE "REGION"
      END


================== NPE ===================


java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
        at 
org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
        at 
org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
        at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
        at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
        at 
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown 
Source)
        at 
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown 
Source)
        at 
org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown 
Source)
        at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown 
Source)
        at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown 
Source)
        at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown 
Source)
        at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:622)
        at com.onseven.dbvis.b.B.B.ā(Z:2256)
        at com.onseven.dbvis.b.B.F$A.call(Z:2838)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:701)
Caused by: ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
        at org.apache.derby.iapi.error.StandardException.newException(Unknown 
Source)
        at 
org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown
 Source)
        ... 22 more
Caused by: java.lang.NullPointerException
        at 
org.apache.derby.exe.acd8cd40bax0152xa074xeeddx0000012ba0d05.e1(Unknown Source)
        at org.apache.derby.impl.services.reflect.DirectCall.invoke(Unknown 
Source)
        at 
org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.doProjection(Unknown 
Source)
        at 
org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown
 Source)
        at 
org.apache.derby.impl.sql.execute.SortResultSet.getRowFromResultSet(Unknown 
Source)
        at 
org.apache.derby.impl.sql.execute.SortResultSet.getNextRowFromRS(Unknown Source)
        at org.apache.derby.impl.sql.execute.SortResultSet.loadSorter(Unknown 
Source)
        at org.apache.derby.impl.sql.execute.SortResultSet.openCore(Unknown 
Source)
        at 
org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(Unknown Source)
        at 
org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
        at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown 
Source)
        ... 13 more











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