Bug 132515 Expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error
Description: Add an expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error.The nesting "Toltal" seem not to be work. Step to reproduce: 1.new a datasource and dataset 2.drag the dataset to layout veiw for a table 3.set a group on the table 4.Insert a data into the group header with the expression e.g. "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" Actual result: An error was thrown out Expected result: It should work correctly in order to support some requirments
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryExecutor.java
temporaryComputedColumns.add( new ComputedColumn( "_{$TEMP_FILTER_"
								+ i + "$}_",
								exprText,
								DataType.ANY_TYPE ) );
						it.remove( );
						result.add( new FilterDefinition( new ConditionalExpression( new ScriptExpression( String.valueOf( "dataSetRow[\"_{$TEMP_FILTER_"
								+ i + "$}_\"]" ) ),
								ce.getOperator( ),
								ce.getOperand1( ),
								ce.getOperand2( ) ) ) );
					}
				}
			}
		}
	}
	/**
	 * 
	 * @param filter
	 * @return
	 */
	private boolean isGroupFilter( IFilterDefinition filter )
	{
		IBaseExpression expr = filter.getExpression( );
		if ( expr instanceof IConditionalExpression )
		{
			String expr4Exception = ( (ConditionalExpression) expr ).getExpression( )
					.getText( );
			try
			{