ABAP Select data from SAP table /ISDFPS/WM_SERNRLIST_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/WM_SERNRLIST_S 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 /ISDFPS/WM_SERNRLIST_S. 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 /ISDFPS/WM_SERNRLIST_S 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_/ISDFPS/WM_SERNRLIST_S TYPE STANDARD TABLE OF /ISDFPS/WM_SERNRLIST_S,
      WA_/ISDFPS/WM_SERNRLIST_S TYPE /ISDFPS/WM_SERNRLIST_S,
      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: </ISDFPS/WM_SERNRLIST_S> TYPE /ISDFPS/WM_SERNRLIST_S.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/WM_SERNRLIST_S
  INTO TABLE IT_/ISDFPS/WM_SERNRLIST_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/WM_SERNRLIST_S
*  INTO TABLE @DATA(IT_/ISDFPS/WM_SERNRLIST_S2).
*--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_/ISDFPS/WM_SERNRLIST_S INDEX 1 INTO DATA(WA_/ISDFPS/WM_SERNRLIST_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/WM_SERNRLIST_S ASSIGNING </ISDFPS/WM_SERNRLIST_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/WM_SERNRLIST_S>-MATNR = 1.
</ISDFPS/WM_SERNRLIST_S>-MAKTX = 1.
</ISDFPS/WM_SERNRLIST_S>-BESTQ = 1.
</ISDFPS/WM_SERNRLIST_S>-SOBKZ = 1.
</ISDFPS/WM_SERNRLIST_S>-SERNR = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/WM_SERNRLIST_S INTO WA_/ISDFPS/WM_SERNRLIST_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/WM_SERNRLIST_S-WERKS, sy-vline,
  WA_/ISDFPS/WM_SERNRLIST_S-CHARG, sy-vline,
  WA_/ISDFPS/WM_SERNRLIST_S-LGORT, sy-vline,
  WA_/ISDFPS/WM_SERNRLIST_S-LGNUM, sy-vline,
  WA_/ISDFPS/WM_SERNRLIST_S-LGTYP, sy-vline,
  WA_/ISDFPS/WM_SERNRLIST_S-LGPLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/WM_SERNRLIST_S 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_/ISDFPS/WM_SERNRLIST_S 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_/ISDFPS/WM_SERNRLIST_S INTO WA_/ISDFPS/WM_SERNRLIST_S.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/WM_SERNRLIST_S-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/WM_SERNRLIST_S-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/WM_SERNRLIST_S-SERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/WM_SERNRLIST_S-SERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/WM_SERNRLIST_S-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/WM_SERNRLIST_S-LENUM.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field EXIDV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/WM_SERNRLIST_S-EXIDV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/WM_SERNRLIST_S-EXIDV.
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_/ISDFPS/WM_SERNRLIST_S_STR, 
MATNR TYPE STRING,
MAKTX TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SERNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
LGORT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
LENUM TYPE STRING,
EQUNR TYPE STRING,
OBKNR TYPE STRING,
OBZAE TYPE STRING,
VENUM TYPE STRING,
VEPOS TYPE STRING,
EXIDV TYPE STRING,
COL_ALV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/WM_SERNRLIST_S_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_/ISDFPS/WM_SERNRLIST_S_STR-MATNR sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-MAKTX sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-BESTQ sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-SOBKZ sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-SERNR sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-WERKS sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-CHARG sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-LGORT sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-LGNUM sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-LGTYP sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-LGPLA sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-LENUM sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-EQUNR sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-OBKNR sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-OBZAE sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-VENUM sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-VEPOS sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-EXIDV sy-vline 
WA_/ISDFPS/WM_SERNRLIST_S_STR-COL_ALV sy-vline      INTO ld_text SEPARATED BY SPACE.

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