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/expression/ExpressionProcessor.java
if ( exprType == GROUP_COLUMN_EXPR )
						{
							exprType = 0;
							helper.setExpressionType( 0, 0 );
							helper.resetPassLevel( );
							return;
						}
					}
					catch ( DataException e )
					{
						DataException dataException = new DataException( ResourceConstants.INVALID_JS_EXPR,
								e,
								expression );
						cmptdColumn.setHandle( new InvalidExpression( dataException ) );
					}
					
					
					if ( helper.getExpressionPassLevel( ) <= 1 )
					{
						if ( tempRefactorCmpList == null )
							tempRefactorCmpList = new ArrayList( );
						tempRefactorCmpList.add( new Integer( i ) );
					}
					else
					{
						helper.resetPassLevel( );
						helper.setExpressionType( exprType, 0 );
						return;
					}