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
List obList = new ArrayList( );
			for ( int i = 0; i < obs.length; i++ )
				obList.add( obs[i] );
			return obList;
		}
		/**
		 * @return
		 */
		private boolean doesLoadFromCache( )
		{
			PreparedJointDataSourceQuery self = PreparedJointDataSourceQuery.this;
			return getDataSetCacheManager()
					.doesLoadFromCache( null,
							dataSetDesign,
							null,
							appContext,
							DataSetCacheUtil.getCacheOption( self.dataEngine.getContext( ),
									appContext ),
							DataSetCacheUtil.getCacheCount( self.dataEngine.getContext( ), appContext ));
		}
		/**
		 * @return
		 */
		private boolean doesSaveToCache( )
		{
			return getDataSetCacheManager().doesSaveToCache( );
		}
	}
}