ABAP Select data from SAP table GTABKEY_W_REPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTABKEY_W_REPO
*  INTO TABLE @DATA(IT_GTABKEY_W_REPO2).
*--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_GTABKEY_W_REPO INDEX 1 INTO DATA(WA_GTABKEY_W_REPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTABKEY_W_REPO>-TABNAME = 1.
<GTABKEY_W_REPO>-CGROUP = 1.
<GTABKEY_W_REPO>-TABKEY = 1.
<GTABKEY_W_REPO>-AS4POS = 1.
<GTABKEY_W_REPO>-ENDKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTABKEY_W_REPO-MASTER, sy-vline,
  WA_GTABKEY_W_REPO-CDLVUNIT, sy-vline,
  WA_GTABKEY_W_REPO-CRELEASE, sy-vline,
  WA_GTABKEY_W_REPO-TLOGOTYPE, sy-vline,
  WA_GTABKEY_W_REPO-TLOGONAME, sy-vline,
  WA_GTABKEY_W_REPO-VIEWNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTABKEY_W_REPO 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_GTABKEY_W_REPO 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_GTABKEY_W_REPO INTO WA_GTABKEY_W_REPO.


*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 ISOLA, internal->external for field LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_GTABKEY_W_REPO-LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GTABKEY_W_REPO-LANG.
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_GTABKEY_W_REPO_STR, 
TABNAME TYPE STRING,
CGROUP TYPE STRING,
TABKEY TYPE STRING,
AS4POS TYPE STRING,
ENDKEY TYPE STRING,
MASTER TYPE STRING,
CDLVUNIT TYPE STRING,
CRELEASE TYPE STRING,
TLOGOTYPE TYPE STRING,
TLOGONAME TYPE STRING,
VIEWNAME TYPE STRING,
LANG TYPE STRING,
LAYOUTID TYPE STRING,
AS4USER TYPE STRING,
TRKORR TYPE STRING,
STAR TYPE STRING,
STAR_POS TYPE STRING,
REPO_ID TYPE STRING,
REPOSITORY TYPE STRING,
BRANCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTABKEY_W_REPO_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_GTABKEY_W_REPO_STR-TABNAME sy-vline 
WA_GTABKEY_W_REPO_STR-CGROUP sy-vline 
WA_GTABKEY_W_REPO_STR-TABKEY sy-vline 
WA_GTABKEY_W_REPO_STR-AS4POS sy-vline 
WA_GTABKEY_W_REPO_STR-ENDKEY sy-vline 
WA_GTABKEY_W_REPO_STR-MASTER sy-vline 
WA_GTABKEY_W_REPO_STR-CDLVUNIT sy-vline 
WA_GTABKEY_W_REPO_STR-CRELEASE sy-vline 
WA_GTABKEY_W_REPO_STR-TLOGOTYPE sy-vline 
WA_GTABKEY_W_REPO_STR-TLOGONAME sy-vline 
WA_GTABKEY_W_REPO_STR-VIEWNAME sy-vline 
WA_GTABKEY_W_REPO_STR-LANG sy-vline 
WA_GTABKEY_W_REPO_STR-LAYOUTID sy-vline 
WA_GTABKEY_W_REPO_STR-AS4USER sy-vline 
WA_GTABKEY_W_REPO_STR-TRKORR sy-vline 
WA_GTABKEY_W_REPO_STR-STAR sy-vline 
WA_GTABKEY_W_REPO_STR-STAR_POS sy-vline 
WA_GTABKEY_W_REPO_STR-REPO_ID sy-vline 
WA_GTABKEY_W_REPO_STR-REPOSITORY sy-vline 
WA_GTABKEY_W_REPO_STR-BRANCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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