ABAP Select data from SAP table /SDF/AJM_METADATA_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SDF/AJM_METADATA_S 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 /SDF/AJM_METADATA_S. 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 /SDF/AJM_METADATA_S 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_/SDF/AJM_METADATA_S TYPE STANDARD TABLE OF /SDF/AJM_METADATA_S,
      WA_/SDF/AJM_METADATA_S TYPE /SDF/AJM_METADATA_S,
      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: </SDF/AJM_METADATA_S> TYPE /SDF/AJM_METADATA_S.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SDF/AJM_METADATA_S
  INTO TABLE IT_/SDF/AJM_METADATA_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SDF/AJM_METADATA_S
*  INTO TABLE @DATA(IT_/SDF/AJM_METADATA_S2).
*--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_/SDF/AJM_METADATA_S INDEX 1 INTO DATA(WA_/SDF/AJM_METADATA_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SDF/AJM_METADATA_S ASSIGNING </SDF/AJM_METADATA_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SDF/AJM_METADATA_S>-CLIENT = 1.
</SDF/AJM_METADATA_S>-MANSYS_CLIENT = 1.
</SDF/AJM_METADATA_S>-EXT_SID = 1.
</SDF/AJM_METADATA_S>-JOBNAME = 1.
</SDF/AJM_METADATA_S>-JOBCOUNT = 1.

ENDLOOP.

LOOP AT IT_/SDF/AJM_METADATA_S INTO WA_/SDF/AJM_METADATA_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SDF/AJM_METADATA_S-STEPCOUNT, sy-vline,
  WA_/SDF/AJM_METADATA_S-SDLSTRTDT, sy-vline,
  WA_/SDF/AJM_METADATA_S-SDLSTRTTM, sy-vline,
  WA_/SDF/AJM_METADATA_S-STATUS, sy-vline,
  WA_/SDF/AJM_METADATA_S-PROGNAME, sy-vline,
  WA_/SDF/AJM_METADATA_S-VARIANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SDF/AJM_METADATA_S 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_/SDF/AJM_METADATA_S 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_/SDF/AJM_METADATA_S INTO WA_/SDF/AJM_METADATA_S.


*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 LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SDF/AJM_METADATA_S-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SDF/AJM_METADATA_S-LANGUAGE.
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_/SDF/AJM_METADATA_S_STR, 
CLIENT TYPE STRING,
MANSYS_CLIENT TYPE STRING,
EXT_SID TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
STEPCOUNT TYPE STRING,
SDLSTRTDT TYPE STRING,
SDLSTRTTM TYPE STRING,
STATUS TYPE STRING,
PROGNAME TYPE STRING,
VARIANT TYPE STRING,
PERIODIC TYPE STRING,
PRDMINS TYPE STRING,
PRDHOURS TYPE STRING,
PRDDAYS TYPE STRING,
PRDWEEKS TYPE STRING,
PRDMONTHS TYPE STRING,
UNAME TYPE STRING,
STRTDATE TYPE STRING,
STRTTIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
IS_STANDARD_JOB TYPE STRING,
DEFPERIOD TYPE STRING,
SDLUNAME TYPE STRING,
LASTCHDATE TYPE STRING,
LASTCHTIME TYPE STRING,
LASTCHNAME TYPE STRING,
LANGUAGE TYPE STRING,
AUTHCKNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SDF/AJM_METADATA_S_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_/SDF/AJM_METADATA_S_STR-CLIENT sy-vline 
WA_/SDF/AJM_METADATA_S_STR-MANSYS_CLIENT sy-vline 
WA_/SDF/AJM_METADATA_S_STR-EXT_SID sy-vline 
WA_/SDF/AJM_METADATA_S_STR-JOBNAME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-JOBCOUNT sy-vline 
WA_/SDF/AJM_METADATA_S_STR-STEPCOUNT sy-vline 
WA_/SDF/AJM_METADATA_S_STR-SDLSTRTDT sy-vline 
WA_/SDF/AJM_METADATA_S_STR-SDLSTRTTM sy-vline 
WA_/SDF/AJM_METADATA_S_STR-STATUS sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PROGNAME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-VARIANT sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PERIODIC sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PRDMINS sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PRDHOURS sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PRDDAYS sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PRDWEEKS sy-vline 
WA_/SDF/AJM_METADATA_S_STR-PRDMONTHS sy-vline 
WA_/SDF/AJM_METADATA_S_STR-UNAME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-STRTDATE sy-vline 
WA_/SDF/AJM_METADATA_S_STR-STRTTIME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-ENDDATE sy-vline 
WA_/SDF/AJM_METADATA_S_STR-ENDTIME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-IS_STANDARD_JOB sy-vline 
WA_/SDF/AJM_METADATA_S_STR-DEFPERIOD sy-vline 
WA_/SDF/AJM_METADATA_S_STR-SDLUNAME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-LASTCHDATE sy-vline 
WA_/SDF/AJM_METADATA_S_STR-LASTCHTIME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-LASTCHNAME sy-vline 
WA_/SDF/AJM_METADATA_S_STR-LANGUAGE sy-vline 
WA_/SDF/AJM_METADATA_S_STR-AUTHCKNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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