Use of Search Help Exits for Suggested Value Lists
Use
A search help exit can be called from the Web Dynpro framework to ascertain either the suggested value list or the results list of the value help popup.
The variant in which it is called can be specified in CL_WEB_DYNPRO=>valuehelpinfo-valuesuggest. Possible values are: abap_true and abap_false
A search help exit can search across multiple columns. To do this, you set CL_WEB_DYNPRO=>valuehelpinfo-suggestfiltercolumn = '01' (allColumns)