ABAP Select data from SAP table WFMS_LOCATION into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WFMS_LOCATION table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to WFMS_LOCATION. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the WFMS_LOCATION table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_WFMS_LOCATION TYPE STANDARD TABLE OF WFMS_LOCATION,
      WA_WFMS_LOCATION TYPE WFMS_LOCATION,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <WFMS_LOCATION> TYPE WFMS_LOCATION.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WFMS_LOCATION.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WFMS_LOCATION
  INTO TABLE IT_WFMS_LOCATION.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFMS_LOCATION
*  INTO TABLE @DATA(IT_WFMS_LOCATION2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_WFMS_LOCATION INDEX 1 INTO DATA(WA_WFMS_LOCATION2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WFMS_LOCATION ASSIGNING <WFMS_LOCATION>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFMS_LOCATION>-LOCATION_TYPE = 1.
<WFMS_LOCATION>-FIELD1 = 1.
<WFMS_LOCATION>-FIELD2 = 1.
<WFMS_LOCATION>-FIELD3 = 1.
<WFMS_LOCATION>-FIELD4 = 1.

ENDLOOP.

LOOP AT IT_WFMS_LOCATION INTO WA_WFMS_LOCATION.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFMS_LOCATION-FIELD5, sy-vline,
  WA_WFMS_LOCATION-FIELD6, sy-vline,
  WA_WFMS_LOCATION-FIELD7, sy-vline,
  WA_WFMS_LOCATION-FIELD8, sy-vline,
  WA_WFMS_LOCATION-FIELD9, sy-vline,
  WA_WFMS_LOCATION-FIELD10, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFMS_LOCATION you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_WFMS_LOCATION TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_WFMS_LOCATION INTO WA_WFMS_LOCATION.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WFMS_LOCATION_STR, 
LOCATION_TYPE TYPE STRING,
FIELD1 TYPE STRING,
FIELD2 TYPE STRING,
FIELD3 TYPE STRING,
FIELD4 TYPE STRING,
FIELD5 TYPE STRING,
FIELD6 TYPE STRING,
FIELD7 TYPE STRING,
FIELD8 TYPE STRING,
FIELD9 TYPE STRING,
FIELD10 TYPE STRING,
FIELD11 TYPE STRING,
FIELD12 TYPE STRING,
FIELD13 TYPE STRING,
FIELD14 TYPE STRING,
FIELD15 TYPE STRING,
FIELD16 TYPE STRING,
FIELD17 TYPE STRING,
FIELD18 TYPE STRING,
FIELD19 TYPE STRING,
FIELD20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFMS_LOCATION_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_WFMS_LOCATION_STR-LOCATION_TYPE sy-vline 
WA_WFMS_LOCATION_STR-FIELD1 sy-vline 
WA_WFMS_LOCATION_STR-FIELD2 sy-vline 
WA_WFMS_LOCATION_STR-FIELD3 sy-vline 
WA_WFMS_LOCATION_STR-FIELD4 sy-vline 
WA_WFMS_LOCATION_STR-FIELD5 sy-vline 
WA_WFMS_LOCATION_STR-FIELD6 sy-vline 
WA_WFMS_LOCATION_STR-FIELD7 sy-vline 
WA_WFMS_LOCATION_STR-FIELD8 sy-vline 
WA_WFMS_LOCATION_STR-FIELD9 sy-vline 
WA_WFMS_LOCATION_STR-FIELD10 sy-vline 
WA_WFMS_LOCATION_STR-FIELD11 sy-vline 
WA_WFMS_LOCATION_STR-FIELD12 sy-vline 
WA_WFMS_LOCATION_STR-FIELD13 sy-vline 
WA_WFMS_LOCATION_STR-FIELD14 sy-vline 
WA_WFMS_LOCATION_STR-FIELD15 sy-vline 
WA_WFMS_LOCATION_STR-FIELD16 sy-vline 
WA_WFMS_LOCATION_STR-FIELD17 sy-vline 
WA_WFMS_LOCATION_STR-FIELD18 sy-vline 
WA_WFMS_LOCATION_STR-FIELD19 sy-vline 
WA_WFMS_LOCATION_STR-FIELD20 sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.