ABAP Select data from SAP table POM_WPS_FILE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM POM_WPS_FILE
*  INTO TABLE @DATA(IT_POM_WPS_FILE2).
*--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_POM_WPS_FILE INDEX 1 INTO DATA(WA_POM_WPS_FILE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<POM_WPS_FILE>-PERNR = 1.
<POM_WPS_FILE>-ECRNO = 1.
<POM_WPS_FILE>-PCRNO = 1.
<POM_WPS_FILE>-PBSNM = 1.
<POM_WPS_FILE>-PACNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_POM_WPS_FILE-SALYR, sy-vline,
  WA_POM_WPS_FILE-SALMO, sy-vline,
  WA_POM_WPS_FILE-TOSAL, sy-vline,
  WA_POM_WPS_FILE-NOREC, sy-vline,
  WA_POM_WPS_FILE-PAYTY, sy-vline,
  WA_POM_WPS_FILE-EMPTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_POM_WPS_FILE 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_POM_WPS_FILE 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_POM_WPS_FILE INTO WA_POM_WPS_FILE.


*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 GJAHR, internal->external for field SALYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_POM_WPS_FILE-SALYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_POM_WPS_FILE-SALYR.
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_POM_WPS_FILE_STR, 
PERNR TYPE STRING,
ECRNO TYPE STRING,
PCRNO TYPE STRING,
PBSNM TYPE STRING,
PACNM TYPE STRING,
SALYR TYPE STRING,
SALMO TYPE STRING,
TOSAL TYPE STRING,
NOREC TYPE STRING,
PAYTY TYPE STRING,
EMPTY TYPE STRING,
EMPID TYPE STRING,
REFNO TYPE STRING,
EMPNM TYPE STRING,
EMBIC TYPE STRING,
EACNM TYPE STRING,
SALFR TYPE STRING,
NWDAY TYPE STRING,
NTSAL TYPE STRING,
BSSAL TYPE STRING,
EHOUR TYPE STRING,
EINCO TYPE STRING,
DEDUC TYPE STRING,
SOSDE TYPE STRING,
NOTES TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_POM_WPS_FILE_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_POM_WPS_FILE_STR-PERNR sy-vline 
WA_POM_WPS_FILE_STR-ECRNO sy-vline 
WA_POM_WPS_FILE_STR-PCRNO sy-vline 
WA_POM_WPS_FILE_STR-PBSNM sy-vline 
WA_POM_WPS_FILE_STR-PACNM sy-vline 
WA_POM_WPS_FILE_STR-SALYR sy-vline 
WA_POM_WPS_FILE_STR-SALMO sy-vline 
WA_POM_WPS_FILE_STR-TOSAL sy-vline 
WA_POM_WPS_FILE_STR-NOREC sy-vline 
WA_POM_WPS_FILE_STR-PAYTY sy-vline 
WA_POM_WPS_FILE_STR-EMPTY sy-vline 
WA_POM_WPS_FILE_STR-EMPID sy-vline 
WA_POM_WPS_FILE_STR-REFNO sy-vline 
WA_POM_WPS_FILE_STR-EMPNM sy-vline 
WA_POM_WPS_FILE_STR-EMBIC sy-vline 
WA_POM_WPS_FILE_STR-EACNM sy-vline 
WA_POM_WPS_FILE_STR-SALFR sy-vline 
WA_POM_WPS_FILE_STR-NWDAY sy-vline 
WA_POM_WPS_FILE_STR-NTSAL sy-vline 
WA_POM_WPS_FILE_STR-BSSAL sy-vline 
WA_POM_WPS_FILE_STR-EHOUR sy-vline 
WA_POM_WPS_FILE_STR-EINCO sy-vline 
WA_POM_WPS_FILE_STR-DEDUC sy-vline 
WA_POM_WPS_FILE_STR-SOSDE sy-vline 
WA_POM_WPS_FILE_STR-NOTES sy-vline 
WA_POM_WPS_FILE_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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