ABAP Select data from SAP table WPSTEUMM_F into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WPSTEUMM_F 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 WPSTEUMM_F. 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 WPSTEUMM_F 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_WPSTEUMM_F TYPE STANDARD TABLE OF WPSTEUMM_F,
      WA_WPSTEUMM_F TYPE WPSTEUMM_F,
      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: <WPSTEUMM_F> TYPE WPSTEUMM_F.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WPSTEUMM_F
*  INTO TABLE @DATA(IT_WPSTEUMM_F2).
*--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_WPSTEUMM_F INDEX 1 INTO DATA(WA_WPSTEUMM_F2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WPSTEUMM_F>-DATUM = 1.
<WPSTEUMM_F>-UTIME = 1.
<WPSTEUMM_F>-AENNR = 1.
<WPSTEUMM_F>-CHGFLAG = 1.
<WPSTEUMM_F>-MANDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WPSTEUMM_F-MATNR, sy-vline,
  WA_WPSTEUMM_F-ALAND, sy-vline,
  WA_WPSTEUMM_F-TAXIM, sy-vline,
  WA_WPSTEUMM_F-KZEXI, sy-vline,
  WA_WPSTEUMM_F-KZREF, sy-vline,
  WA_WPSTEUMM_F-KZ_INIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WPSTEUMM_F 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_WPSTEUMM_F 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_WPSTEUMM_F INTO WA_WPSTEUMM_F.


*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.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WPSTEUMM_F-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WPSTEUMM_F-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WPSTEUMM_F-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WPSTEUMM_F-MATNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_WPSTEUMM_F_STR, 
DATUM TYPE STRING,
UTIME TYPE STRING,
AENNR TYPE STRING,
CHGFLAG TYPE STRING,
MANDT TYPE STRING,
MATNR TYPE STRING,
ALAND TYPE STRING,
TAXIM TYPE STRING,
KZEXI TYPE STRING,
KZREF TYPE STRING,
KZ_INIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WPSTEUMM_F_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_WPSTEUMM_F_STR-DATUM sy-vline 
WA_WPSTEUMM_F_STR-UTIME sy-vline 
WA_WPSTEUMM_F_STR-AENNR sy-vline 
WA_WPSTEUMM_F_STR-CHGFLAG sy-vline 
WA_WPSTEUMM_F_STR-MANDT sy-vline 
WA_WPSTEUMM_F_STR-MATNR sy-vline 
WA_WPSTEUMM_F_STR-ALAND sy-vline 
WA_WPSTEUMM_F_STR-TAXIM sy-vline 
WA_WPSTEUMM_F_STR-KZEXI sy-vline 
WA_WPSTEUMM_F_STR-KZREF sy-vline 
WA_WPSTEUMM_F_STR-KZ_INIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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