Hi,
I asume that you are using SEGW?
This is an example of how to use it:
METHOD xxxxxxx_get_entityset. DATA: lv_sapmodule TYPE char4, lv_id TYPE char7. FIELD-SYMBOLS <fs_key_tab> TYPE /iwbep/s_mgw_name_value_pair. READ TABLE it_key_tab WITH KEY name = 'your_parameter_name' ASSIGNING <fs_key_tab>. IF <fs_key_tab> IS ASSIGNED. lv_fieldname = <fs_key_tab>-value. ENDIF. SELECT * FROM z_table INTO TABLE et_entityset WHERE sapmodule = lv_fieldname. SORT et_entityset BY item ASCENDING. ENDMETHOD.
employeesset_get_entityset