ABAP Select data from SAP table WAFORM_THE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WAFORM_THE 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_THE. 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_THE 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_THE TYPE STANDARD TABLE OF WAFORM_THE,
      WA_WAFORM_THE TYPE WAFORM_THE,
      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_THE> TYPE WAFORM_THE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WAFORM_THE
*  INTO TABLE @DATA(IT_WAFORM_THE2).
*--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_THE INDEX 1 INTO DATA(WA_WAFORM_THE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WAFORM_THE>-AKTHE = 1.
<WAFORM_THE>-BEZEI = 1.
<WAFORM_THE>-NBPOS = 1.
<WAFORM_THE>-FLOES = 1.
<WAFORM_THE>-LIGEN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WAFORM_THE-AUGEN, sy-vline,
  WA_WAFORM_THE-BEGEN, sy-vline,
  WA_WAFORM_THE-VKGEN, sy-vline,
  WA_WAFORM_THE-EKGEN, sy-vline,
  WA_WAFORM_THE-ARTNR1, sy-vline,
  WA_WAFORM_THE-MEBME1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WAFORM_THE 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_THE 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_THE INTO WA_WAFORM_THE.


*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 ARTNR1
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-ARTNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-ARTNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBME1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-MEBME1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-MEBME1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ARTNR2
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-ARTNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-ARTNR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBME2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-MEBME2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-MEBME2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ARTNR3
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-ARTNR3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-ARTNR3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBME3
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-MEBME3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-MEBME3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ARTNR4
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-ARTNR4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-ARTNR4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBME4
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-MEBME4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-MEBME4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ARTNR5
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-ARTNR5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-ARTNR5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBME5
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_THE-MEBME5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_THE-MEBME5.
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_THE_STR, 
AKTHE TYPE STRING,
BEZEI TYPE STRING,
NBPOS TYPE STRING,
FLOES TYPE STRING,
LIGEN TYPE STRING,
AUGEN TYPE STRING,
BEGEN TYPE STRING,
VKGEN TYPE STRING,
EKGEN TYPE STRING,
ARTNR1 TYPE STRING,
MEBME1 TYPE STRING,
ARTNR2 TYPE STRING,
MEBME2 TYPE STRING,
ARTNR3 TYPE STRING,
MEBME3 TYPE STRING,
ARTNR4 TYPE STRING,
MEBME4 TYPE STRING,
ARTNR5 TYPE STRING,
MEBME5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WAFORM_THE_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_THE_STR-AKTHE sy-vline 
WA_WAFORM_THE_STR-BEZEI sy-vline 
WA_WAFORM_THE_STR-NBPOS sy-vline 
WA_WAFORM_THE_STR-FLOES sy-vline 
WA_WAFORM_THE_STR-LIGEN sy-vline 
WA_WAFORM_THE_STR-AUGEN sy-vline 
WA_WAFORM_THE_STR-BEGEN sy-vline 
WA_WAFORM_THE_STR-VKGEN sy-vline 
WA_WAFORM_THE_STR-EKGEN sy-vline 
WA_WAFORM_THE_STR-ARTNR1 sy-vline 
WA_WAFORM_THE_STR-MEBME1 sy-vline 
WA_WAFORM_THE_STR-ARTNR2 sy-vline 
WA_WAFORM_THE_STR-MEBME2 sy-vline 
WA_WAFORM_THE_STR-ARTNR3 sy-vline 
WA_WAFORM_THE_STR-MEBME3 sy-vline 
WA_WAFORM_THE_STR-ARTNR4 sy-vline 
WA_WAFORM_THE_STR-MEBME4 sy-vline 
WA_WAFORM_THE_STR-ARTNR5 sy-vline 
WA_WAFORM_THE_STR-MEBME5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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