Bug 141950 Selection of select value in data set filter is error
Details: Selection of select value in data set filter is error Step: 1.New a report design. 2.Create a sample datasource and dataset. 3.Switch to filter. 4.Select a value in expression. 5.Drop the list of the value1 and select <select value...> Actual result: No value is appear and pop up an error. It said that "An expression has not been set"
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/DataSetProvider.java
}
						columns[n].setName( columnName );
					}
					if ( columns[n].getName( ).equals( hint.getColumnName( ) ) )
					{
						columns[n].setDisplayName( hint.getDisplayName( ) );
						columns[n].setAlias( hint.getAlias( ) );
						columns[n].setHelpText( hint.getHelpText( ) );
						break;
					}
				}
			}
		}
	}
	/**
	 * 
	 * @param dataSet
	 * @return
	 * @throws BirtException
	 */
	public IBaseDataSetDesign createDataSetDesign( DataSetHandle dataSet )
			throws BirtException
	{
		DataSessionContext context = new DataSessionContext( DataSessionContext.MODE_DIRECT_PRESENTATION,
				dataSet.getModuleHandle( ) );
		DataRequestSession session = DataRequestSession.newSession( context );
		return session.getModelAdaptor( ).adaptDataSet( dataSet );
	}
	/**
	 *