ABAP Select data from SAP table WAFORM_POS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WAFORM_POS
*  INTO TABLE @DATA(IT_WAFORM_POS2).
*--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_WAFORM_POS INDEX 1 INTO DATA(WA_WAFORM_POS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WAFORM_POS>-AKTNR = 1.
<WAFORM_POS>-ARTNR = 1.
<WAFORM_POS>-MEBME = 1.
<WAFORM_POS>-MAKTX = 1.
<WAFORM_POS>-AUFME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WAFORM_POS-SPGRU, sy-vline,
  WA_WAFORM_POS-NBPOS, sy-vline,
  WA_WAFORM_POS-MEAUF, sy-vline,
  WA_WAFORM_POS-NWERK, sy-vline,
  WA_WAFORM_POS-NWERB, sy-vline,
  WA_WAFORM_POS-FLOES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WAFORM_POS 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_WAFORM_POS 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_WAFORM_POS INTO WA_WAFORM_POS.


*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 AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_POS-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_POS-AKTNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEBME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_POS-MEBME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_POS-MEBME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEAUF
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_POS-MEAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_POS-MEAUF.
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_WAFORM_POS_STR, 
AKTNR TYPE STRING,
ARTNR TYPE STRING,
MEBME TYPE STRING,
MAKTX TYPE STRING,
AUFME TYPE STRING,
SPGRU TYPE STRING,
NBPOS TYPE STRING,
MEAUF TYPE STRING,
NWERK TYPE STRING,
NWERB TYPE STRING,
FLOES TYPE STRING,
FPRAN TYPE STRING,
FMEAN TYPE STRING,
FSPER TYPE STRING,
EKGEN TYPE STRING,
VKGEN TYPE STRING,
LIGEN TYPE STRING,
AUGEN TYPE STRING,
BEGEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WAFORM_POS_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_WAFORM_POS_STR-AKTNR sy-vline 
WA_WAFORM_POS_STR-ARTNR sy-vline 
WA_WAFORM_POS_STR-MEBME sy-vline 
WA_WAFORM_POS_STR-MAKTX sy-vline 
WA_WAFORM_POS_STR-AUFME sy-vline 
WA_WAFORM_POS_STR-SPGRU sy-vline 
WA_WAFORM_POS_STR-NBPOS sy-vline 
WA_WAFORM_POS_STR-MEAUF sy-vline 
WA_WAFORM_POS_STR-NWERK sy-vline 
WA_WAFORM_POS_STR-NWERB sy-vline 
WA_WAFORM_POS_STR-FLOES sy-vline 
WA_WAFORM_POS_STR-FPRAN sy-vline 
WA_WAFORM_POS_STR-FMEAN sy-vline 
WA_WAFORM_POS_STR-FSPER sy-vline 
WA_WAFORM_POS_STR-EKGEN sy-vline 
WA_WAFORM_POS_STR-VKGEN sy-vline 
WA_WAFORM_POS_STR-LIGEN sy-vline 
WA_WAFORM_POS_STR-AUGEN sy-vline 
WA_WAFORM_POS_STR-BEGEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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