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JDK-6462470 : java.lang.NullPointerException from query object update procedure
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.sql
  • Affected Version: 6
  • Priority: P2
  • Status: Closed
  • Resolution: Fixed
  • OS: linux_2.6
  • CPU: x86
  • Submitted: 2006-08-22
  • Updated: 2011-02-16
  • Resolved: 2006-08-30
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JDK 6
6 b98Fixed
Description
The following code (Run with Java DB 10.2.1.0 beta):

import java.sql.*;

public class EODExceptionBug
{
    interface PersonQ extends BaseQuery {
        @java.sql.Update(sql="create table tab (i integer)")
            int createTable();
    }
    
    static public void main(String []args) 
        throws Exception
    {
	String driver = "org.apache.derby.jdbc.EmbeddedDriver";
	String url = "jdbc:derby:/tmp/eodbug;create=true";
        
        Connection conn = DriverManager.getConnection(url);
        
        PersonQ pq = conn.createQueryObject(PersonQ.class);

        System.out.println("First create");
        pq.createTable();
        System.out.println("Second create");
        try {
            pq.createTable();
        } catch (SQLRuntimeException e) {
            System.out.println("Should end up here, but don't");
        }
    }
}


Gives the following response:
First create
Second create
java.sql.SQLException: Table/View 'TAB' already exists in Schema 'APP'.
        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.generateCsSQLException(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.EmbedPreparedStatement.executeStatement(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(Unknown Source)
        at com.sun.sql.QueryObjectGeneratorImpl.getUpdateImpl(QueryObjectGeneratorImpl.java:543)
        at com.sun.sql.QueryObjectGeneratorImpl.access$200(QueryObjectGeneratorImpl.java:24)
        at com.sun.sql.QueryObjectGeneratorImpl$3.run(QueryObjectGeneratorImpl.java:244)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.sql.QueryObjectGeneratorImpl.invoke(QueryObjectGeneratorImpl.java:239)
        at $Proxy0.createTable(Unknown Source)
        at EODExceptionBug.main(EODExceptionBug.java:24)
Caused by: java.sql.SQLException: Table/View 'TAB' already exists in Schema 'APP'.
        ... 18 more
Exception in thread "main" java.lang.NullPointerException
        at $Proxy0.createTable(Unknown Source)
        at EODExceptionBug.main(EODExceptionBug.java:24)

Comments
EVALUATION The exceptions were caught and there stack trace were being printed instead of throwing those exceptions further.
2006-08-25

SUGGESTED FIX The exceptions were caught and there stack trace were being printed instead of throwing those exceptions further. All such cases have been removed. Now all exceptions are thrown. All cases of exception being caught and stack trace being printed are removed. checkin logs Checking in QueryObject.java; /m/jws/jdbc4.0/src/com/sun/sql/QueryObject.java,v <-- QueryObject.java new revision: 1.5; previous revision: 1.4 done
2006-08-25