Bug 136522 [Regression]DateTime parameter can't be drag to the layout
Steps to reproduce: 1.New a date time parameter 2.Drag it to the layout Actual result: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:2.1.0.N20060412-2230 Error Code:Error.PropertyValueException.CHOICE_NOT_FOUND Error Message:The choice value "dateTime" is not found.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
{
					ComputedColumnHandle element = (ComputedColumnHandle) iter.next( );
					if ( element.getStructure( ).equals( bindingColumn ) )
					{
						bindingExist = true;
						break;
					}
				}
			}
			else
			{
				for ( Iterator iter = container.getColumnBindings( ).iterator( ); iter.hasNext( ); )
				{
					ComputedColumnHandle element = (ComputedColumnHandle) iter.next( );
					if ( element.getStructure( ).equals( bindingColumn ) )
					{
						bindingExist = true;
						break;
					}
				}
			}
		}
		if ( !bindingExist )
		{
			ComputedColumn bindingColumn = StructureFactory.newComputedColumn( dataHandle,
					model.getColumnName( ) );
			bindingColumn.setDataType( model.getDataType( ) );
			bindingColumn.setExpression( DEUtil.getExpression( model ) );
			dataHandle.addColumnBinding( bindingColumn, false );
			dataHandle.setDataSet( dataSet );