ABAP Select data from SAP table /SCWM/S_ASPQ_WHO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_ASPQ_WHO
*  INTO TABLE @DATA(IT_/SCWM/S_ASPQ_WHO2).
*--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_/SCWM/S_ASPQ_WHO INDEX 1 INTO DATA(WA_/SCWM/S_ASPQ_WHO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_ASPQ_WHO>-LGNUM = 1.
</SCWM/S_ASPQ_WHO>-STATUS = 1.
</SCWM/S_ASPQ_WHO>-WHO = 1.
</SCWM/S_ASPQ_WHO>-AREAWHO = 1.
</SCWM/S_ASPQ_WHO>-QUEUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_ASPQ_WHO-TYPE, sy-vline,
  WA_/SCWM/S_ASPQ_WHO-WAVE, sy-vline,
  WA_/SCWM/S_ASPQ_WHO-PROCESSOR, sy-vline,
  WA_/SCWM/S_ASPQ_WHO-TANUM, sy-vline,
  WA_/SCWM/S_ASPQ_WHO-VLENR, sy-vline,
  WA_/SCWM/S_ASPQ_WHO-IDPLATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_ASPQ_WHO 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_/SCWM/S_ASPQ_WHO 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_/SCWM/S_ASPQ_WHO INTO WA_/SCWM/S_ASPQ_WHO.


*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 ALPH0, internal->external for field WHO
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ASPQ_WHO-WHO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ASPQ_WHO-WHO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field WAVE
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ASPQ_WHO-WAVE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ASPQ_WHO-WAVE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PROCR, internal->external for field PROCESSOR
CALL FUNCTION 'CONVERSION_EXIT_PROCR_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ASPQ_WHO-PROCESSOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ASPQ_WHO-PROCESSOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field TANUM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ASPQ_WHO-TANUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ASPQ_WHO-TANUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit HUID, internal->external for field VLENR
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ASPQ_WHO-VLENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ASPQ_WHO-VLENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field F_TANUM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_ASPQ_WHO-F_TANUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_ASPQ_WHO-F_TANUM.
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_/SCWM/S_ASPQ_WHO_STR, 
LGNUM TYPE STRING,
STATUS TYPE STRING,
WHO TYPE STRING,
AREAWHO TYPE STRING,
QUEUE TYPE STRING,
TYPE TYPE STRING,
WAVE TYPE STRING,
PROCESSOR TYPE STRING,
TANUM TYPE STRING,
VLENR TYPE STRING,
IDPLATE TYPE STRING,
F_TANUM TYPE STRING,
F_TOSTAT_O TYPE STRING,
DSDB TYPE STRING,
DSAR TYPE STRING,
DSBO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_ASPQ_WHO_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_/SCWM/S_ASPQ_WHO_STR-LGNUM sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-STATUS sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-WHO sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-AREAWHO sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-QUEUE sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-TYPE sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-WAVE sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-PROCESSOR sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-TANUM sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-VLENR sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-IDPLATE sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-F_TANUM sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-F_TOSTAT_O sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-DSDB sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-DSAR sy-vline 
WA_/SCWM/S_ASPQ_WHO_STR-DSBO sy-vline      INTO ld_text SEPARATED BY SPACE.

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