ABAP Select data from SAP table GSS_J_1AF016_LIST2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GSS_J_1AF016_LIST2 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 GSS_J_1AF016_LIST2. 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 GSS_J_1AF016_LIST2 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_GSS_J_1AF016_LIST2 TYPE STANDARD TABLE OF GSS_J_1AF016_LIST2,
      WA_GSS_J_1AF016_LIST2 TYPE GSS_J_1AF016_LIST2,
      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: <GSS_J_1AF016_LIST2> TYPE GSS_J_1AF016_LIST2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GSS_J_1AF016_LIST2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GSS_J_1AF016_LIST2
  INTO TABLE IT_GSS_J_1AF016_LIST2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GSS_J_1AF016_LIST2
*  INTO TABLE @DATA(IT_GSS_J_1AF016_LIST22).
*--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_GSS_J_1AF016_LIST2 INDEX 1 INTO DATA(WA_GSS_J_1AF016_LIST22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GSS_J_1AF016_LIST2 ASSIGNING <GSS_J_1AF016_LIST2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GSS_J_1AF016_LIST2>-BELNR = 1.
<GSS_J_1AF016_LIST2>-GJAHR = 1.
<GSS_J_1AF016_LIST2>-HKONT = 1.
<GSS_J_1AF016_LIST2>-NAME1 = 1.
<GSS_J_1AF016_LIST2>-CLASS = 1.

ENDLOOP.

LOOP AT IT_GSS_J_1AF016_LIST2 INTO WA_GSS_J_1AF016_LIST2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GSS_J_1AF016_LIST2-DATE, sy-vline,
  WA_GSS_J_1AF016_LIST2-OFFNR, sy-vline,
  WA_GSS_J_1AF016_LIST2-X_TEXT, sy-vline,
  WA_GSS_J_1AF016_LIST2-TXCOD, sy-vline,
  WA_GSS_J_1AF016_LIST2-QSCOD, sy-vline,
  WA_GSS_J_1AF016_LIST2-TCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GSS_J_1AF016_LIST2 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_GSS_J_1AF016_LIST2 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_GSS_J_1AF016_LIST2 INTO WA_GSS_J_1AF016_LIST2.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GSS_J_1AF016_LIST2-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GSS_J_1AF016_LIST2-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GSS_J_1AF016_LIST2-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GSS_J_1AF016_LIST2-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GSS_J_1AF016_LIST2-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GSS_J_1AF016_LIST2-HKONT.
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_GSS_J_1AF016_LIST2_STR, 
BELNR TYPE STRING,
GJAHR TYPE STRING,
HKONT TYPE STRING,
NAME1 TYPE STRING,
CLASS TYPE STRING,
DATE TYPE STRING,
OFFNR TYPE STRING,
X_TEXT TYPE STRING,
TXCOD TYPE STRING,
QSCOD TYPE STRING,
TCODE TYPE STRING,
X_TEXT1 TYPE STRING,
DATE1 TYPE STRING,
FITYP TYPE STRING,
X_TEXT2 TYPE STRING,
EXRT TYPE STRING,
EXDF TYPE STRING,
STCDT TYPE STRING,
STCD1 TYPE STRING,
CTNUM TYPE STRING,
BUTXT TYPE STRING,
GRSUP TYPE STRING,
FPTID TYPE STRING,
CCTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GSS_J_1AF016_LIST2_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_GSS_J_1AF016_LIST2_STR-BELNR sy-vline 
WA_GSS_J_1AF016_LIST2_STR-GJAHR sy-vline 
WA_GSS_J_1AF016_LIST2_STR-HKONT sy-vline 
WA_GSS_J_1AF016_LIST2_STR-NAME1 sy-vline 
WA_GSS_J_1AF016_LIST2_STR-CLASS sy-vline 
WA_GSS_J_1AF016_LIST2_STR-DATE sy-vline 
WA_GSS_J_1AF016_LIST2_STR-OFFNR sy-vline 
WA_GSS_J_1AF016_LIST2_STR-X_TEXT sy-vline 
WA_GSS_J_1AF016_LIST2_STR-TXCOD sy-vline 
WA_GSS_J_1AF016_LIST2_STR-QSCOD sy-vline 
WA_GSS_J_1AF016_LIST2_STR-TCODE sy-vline 
WA_GSS_J_1AF016_LIST2_STR-X_TEXT1 sy-vline 
WA_GSS_J_1AF016_LIST2_STR-DATE1 sy-vline 
WA_GSS_J_1AF016_LIST2_STR-FITYP sy-vline 
WA_GSS_J_1AF016_LIST2_STR-X_TEXT2 sy-vline 
WA_GSS_J_1AF016_LIST2_STR-EXRT sy-vline 
WA_GSS_J_1AF016_LIST2_STR-EXDF sy-vline 
WA_GSS_J_1AF016_LIST2_STR-STCDT sy-vline 
WA_GSS_J_1AF016_LIST2_STR-STCD1 sy-vline 
WA_GSS_J_1AF016_LIST2_STR-CTNUM sy-vline 
WA_GSS_J_1AF016_LIST2_STR-BUTXT sy-vline 
WA_GSS_J_1AF016_LIST2_STR-GRSUP sy-vline 
WA_GSS_J_1AF016_LIST2_STR-FPTID sy-vline 
WA_GSS_J_1AF016_LIST2_STR-CCTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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