ABAP Select data from SAP table DB6ADMCLAS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6ADMCLAS 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 DB6ADMCLAS. 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 DB6ADMCLAS 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_DB6ADMCLAS TYPE STANDARD TABLE OF DB6ADMCLAS,
      WA_DB6ADMCLAS TYPE DB6ADMCLAS,
      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: <DB6ADMCLAS> TYPE DB6ADMCLAS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6ADMCLAS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6ADMCLAS
  INTO TABLE IT_DB6ADMCLAS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6ADMCLAS
*  INTO TABLE @DATA(IT_DB6ADMCLAS2).
*--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_DB6ADMCLAS INDEX 1 INTO DATA(WA_DB6ADMCLAS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6ADMCLAS ASSIGNING <DB6ADMCLAS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6ADMCLAS>-STATUSICON = 1.
<DB6ADMCLAS>-STATUSTEXT = 1.
<DB6ADMCLAS>-TABART = 1.
<DB6ADMCLAS>-DDCLASS = 1.
<DB6ADMCLAS>-DESCR = 1.

ENDLOOP.

LOOP AT IT_DB6ADMCLAS INTO WA_DB6ADMCLAS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6ADMCLAS-CATEGORY, sy-vline,
  WA_DB6ADMCLAS-TABLECNT, sy-vline,
  WA_DB6ADMCLAS-INDEXCNT, sy-vline,
  WA_DB6ADMCLAS-DATASPACE, sy-vline,
  WA_DB6ADMCLAS-INDEXSPACE, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DB6ADMCLAS 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_DB6ADMCLAS 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_DB6ADMCLAS INTO WA_DB6ADMCLAS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DB6ADMCLAS_STR, 
STATUSICON TYPE STRING,
STATUSTEXT TYPE STRING,
TABART TYPE STRING,
DDCLASS TYPE STRING,
DESCR TYPE STRING,
CATEGORY TYPE STRING,
TABLECNT TYPE STRING,
INDEXCNT TYPE STRING,
DATASPACE TYPE STRING,
INDEXSPACE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6ADMCLAS_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_DB6ADMCLAS_STR-STATUSICON sy-vline 
WA_DB6ADMCLAS_STR-STATUSTEXT sy-vline 
WA_DB6ADMCLAS_STR-TABART sy-vline 
WA_DB6ADMCLAS_STR-DDCLASS sy-vline 
WA_DB6ADMCLAS_STR-DESCR sy-vline 
WA_DB6ADMCLAS_STR-CATEGORY sy-vline 
WA_DB6ADMCLAS_STR-TABLECNT sy-vline 
WA_DB6ADMCLAS_STR-INDEXCNT sy-vline 
WA_DB6ADMCLAS_STR-DATASPACE sy-vline 
WA_DB6ADMCLAS_STR-INDEXSPACE sy-vline      INTO ld_text SEPARATED BY SPACE.

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