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
/**
	 * Initialize the resultClass. This method is lightweight.
	 * 
	 * @param dataEngine
	 * @param dataSetDesign
	 * @param appContext
	 * @throws DataException
	 */
	private void initializeResultClass( DataEngineImpl dataEngine, Map appContext )
			throws DataException
	{
		try
		{
			
			
			IResultMetaData leftMetaData = this.leftQueryResults.getResultMetaData( );
			IResultMetaData rightMetaData = this.rightQueryResults.getResultMetaData( );
			
			JointResultMetadata meta = getJointResultMetadata( leftMetaData,
					rightMetaData );
			resultClass = meta.getResultClass( );
		}
		catch ( BirtException be )
		{
			throw DataException.wrap( be );
		}
	}
	/**
	 * @param dataSetDesign
	 */