Bug 131011 Support running query based on report document data
Data Engine should support running a query based on data set and expression data stored in a report document. This bugzilla entry serves as a repository for design docs and notes related to this feature.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
boolean retValue = false;
			if ( fieldValue == groupKeyValues[i] )
			{
				retValue = true;
			}
			else if ( fieldValue != null && groupKeyValues[i] != null )
			{
				if ( fieldValue.getClass( )
						.equals( groupKeyValues[i].getClass( ) ) )
				{
					retValue = isTwoObjectEqual( fieldValue, groupKeyValues[i] );
				}
				else
				{
					Object convertedOb = DataTypeUtil.convert( groupKeyValues[i],
							fieldValue.getClass( ) );
					retValue = isTwoObjectEqual( fieldValue, convertedOb );
				}
			}
			return retValue;
		}
		/**
		 * @param value1
		 * @param value2
		 * @return
		 */
		private boolean isTwoObjectEqual( Object value1, Object value2 )
		{
			 
			if( value1 instanceof Date && value2 instanceof Date)