SAP ABAP Message Class DDLS Message Number 320 (String column & is not possible with SELECT DISTINCT)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-DWB-DIC (Application Component) ABAP Dictionary
     SDDL (Package) DDL-Specific Dictionary Functions
Attribute
Message class DDLS  
Short Description For DDL source handling    
Message Number 320  
Documentation status   3   The short text describes the object sufficiently
Authorization check Error Message      
Changed On 20140121   
Message Text
String column & is not possible with SELECT DISTINCT
History
Last changed on/by 20141121  SAP 
SAP Release Created in   740