Bug 191627 [Regression]Exception occurs when first preview the joint dataset[0706]
Description: [Regression]Exception occurs when preview the flatfile and sampledb joint dataset[0706] Build number: 2.2.0.v20070608-0630 Steps to reproduce: 1, New a flatfile dataset 2, New a CUSTOMER dataset 3, Join two datasets with STATE column 4, Preview in dataset Expected result: Preview successfully Actual result: Exception occurs Error log: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Data Engine Plug-in ID:org.eclipse.birt.data Version:2.2.0.v20070607-1421 Error Code:data.engine.ColumnBindingReferToInexistColumn Error Message:Column binding "Employee::CUSTOMERNUMBER" has referred to a data set column "Employee::CUSTOMERNUMBER" which is not exist.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedJointDataSourceQuery.java
* such as ResultIterator population.
	 * 
	 * @param dataEngine
	 * @param appContext
	 * @throws DataException
	 */
	private void initialize( DataEngineImpl dataEngine, Map appContext )
			throws DataException
	{
		int savedCacheOption = getDataSetCacheManager( ).suspendCache( );
		try
		{
			ResultIterator left = (ResultIterator) this.leftQueryResults.getResultIterator( );
			ResultIterator right = (ResultIterator) this.rightQueryResults.getResultIterator( );
			getDataSetCacheManager( ).setCacheOption( savedCacheOption );
			getDataSetCacheManager( ).setCacheMode( DataSetCacheUtil.getCacheMode( appContext ) );
			this.left = left;
			this.right = right;
			this.joinType = dataSet.getJoinType( );
			this.matcher = new JoinConditionMatcher( left.getOdiResult( ),
					right.getOdiResult( ),
					left.getScope( ),
					right.getScope( ),
					dataSet.getJoinConditions( ) );
		}
		catch ( BirtException e )
		{
			throw DataException.wrap( e );
		}
	}