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  1. Derby
  2. DERBY-4780

NullPointerException thrown when creating nested query

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Duplicate
    • 10.6.1.0
    • None
    • SQL
    • None
    • Mac OS X 10.6.4, Java 1.6.0_20

    Description

      I'm writing a Java application that's working with Embedded Apache Derby via JDBC. I'm having problems with the code in the following snippet:

      byte md5[] = md5sum(file);

      PreparedStatement s = con.prepareStatement("INSERT INTO input_files (job_ID, hash) SELECT job_id, ? FROM job WHERE job_name = ?");
      s.setBytes(1, md5);
      s.setString(2, jobName);
      s.executeUpdate();
      s.close();

      This inserts into the following tables:

      CREATE TABLE input_files
      (
      hash char(16) for bit data,
      job_id integer REFERENCES job,
      PRIMARY KEY(job_id, hash)
      );

      CREATE TABLE job
      (
      job_id integer PRIMARY KEY GENERATED ALWAYS as IDENTITY,
      job_name character varying(50) UNIQUE NOT NULL,
      #other fields
      );

      The idea is that there is an internal integer `job_id` which is used internally by the database, but we want to reference it as much as possible with the human-readable String `job_name`

      This consistently throws the following exception.

      java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
      at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
      at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
      at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
      at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(UnknownSource)
      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.EmbedPreparedStatement.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
      at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at [line 3 of snippet above]

      As you can see, this is thrown from the line where the prepared statement is created - it doesn't get as far as executing it. I had assumed I was doing something wrong, but a few people over at Stack Overflow ( http://stackoverflow.com/questions/3503710/derby-insert-select-null-pointer-exception ) reckon that this is a bug, at least in terms of what error is being reported. For what it's worth, the exact same code works fine with PostgreSQL.

      Derby.log:

      ----------------------------------------------------------------
      2010-08-18 08:47:08.779 GMT:
      Booting Derby version The Apache Software Foundation - Apache Derby - 10.6.1.0 - (938214): instance a816c00e-012a-8461-611c-0000046700d0
      on database directory /path/to/myDatabase with class loader sun.misc.Launcher$AppClassLoader@6d6f0472

      Database Class Loader started - derby.database.classpath=''
      2010-08-18 08:47:12.067 GMT Thread[SwingWorker-pool-1-thread-1,5,main] (XID = 316), (SESSIONID = 1), (DATABASE = myDatabase), (DRDAID = null), Cleanup action starting
      2010-08-18 08:47:12.067 GMT Thread[SwingWorker-pool-1-thread-1,5,main] (XID = 316), (SESSIONID = 1), (DATABASE = myDatabase), (DRDAID = null), Failed Statement is: INSERT INTO input_files (job_id, hash) SELECT job_id, ? FROM job WHERE job_name = ?
      java.lang.NullPointerException
      at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown Source)
      at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
      at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
      at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at [line 3 of snippet]
      Cleanup action completed

      2010-08-18 08:47:12.084 GMT:
      Shutting down instance a816c00e-012a-8461-611c-0000046700d0 with class loader sun.misc.Launcher$AppClassLoader@6d6f0472
      ----------------------------------------------------------------

      and unrolled exception:

      java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
      at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
      at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(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.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.EmbedPreparedStatement.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
      at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at [line 3 of snippet above]
      Caused by: java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
      at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
      at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
      ... 26 more
      Caused by: java.lang.NullPointerException
      at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown Source)
      at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
      at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
      ... 19 more
      SQLState: XJ001
      Error code: 0
      Message: Java exception: ': java.lang.NullPointerException'.
      Cause: java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
      at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
      at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
      at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
      at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(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.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.EmbedPreparedStatement.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
      at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at [line 3 of snippet above]
      Caused by: java.lang.NullPointerException
      at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown Source)
      at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
      at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
      ... 19 more
      Cause: java.lang.NullPointerException
      at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown Source)
      at org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown Source)
      at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
      at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
      at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
      at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
      at [line 3 of snippet above]

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. DERBY-4671 Embedded driver does not work with jbossCache

          • Major - Major loss of function.
          • Closed

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              Unassigned Unassigned
              scottwilson Scott Wilson
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                Created:
                Updated:
                Resolved: