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
}
			for ( int i = 0; i < bindingParams.length; i++ )
			{
				ParamBindingHandle param = bindingParams[i];
				InputParameterBinding binding = new InputParameterBinding( param.getParamName( ),
						new ScriptExpression( param.getExpression( ) ) );
				defn.addInputParamBinding( binding );
			}
			return defn;
		}
		return null;
	}
	/**
	 * 
	 * @param orgColumnNameSet
	 * @param newColumnNameSet
	 * @param columnName
	 * @param index
	 * @return
	 */
	private String getUniqueName( HashSet orgColumnNameSet,
			HashSet newColumnNameSet, String columnName, int index )
	{
		String newColumnName;
		if ( columnName == null
				|| columnName.trim( ).length( ) == 0
				|| newColumnNameSet.contains( columnName ) )
		{
			
			if ( columnName == null || columnName.trim( ).length( ) == 0 )