Bug 151535 Parameters are invisable in Joint Dataset
Trying to use "Joint Dataset" combined with parameters within underlaying Data-Sets (neccessary to achive a filtering where clause for a DateTime Field) Parameter editing ( e.g. in Chart designer) do not show the entire parameter. As specified it should show and let to edit a combination of both underlaying datasets' parameters.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedJointDataSourceQuery.java
return null;
			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 DataSetCacheManager.getInstance( )
					.doesLoadFromCache( null,
							dataSetDesign,
							null,
							DataSetCacheUtil.getCacheOption( self.dataEngine.getContext( ),
									appContext ),
							self.dataEngine.getContext( ).getCacheCount( ) );
		}
		/**
		 * @return
		 */
		private boolean doesSaveToCache( )
		{
			return DataSetCacheManager.getInstance( ).doesSaveToCache( );
		}
	}
}