ABAP Select data from SAP table BKKMINTERV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKKMINTERV
*  INTO TABLE @DATA(IT_BKKMINTERV2).
*--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_BKKMINTERV INDEX 1 INTO DATA(WA_BKKMINTERV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKKMINTERV>-MANDT = 1.
<BKKMINTERV>-PROGN = 1.
<BKKMINTERV>-PROGDATE = 1.
<BKKMINTERV>-PROGNO = 1.
<BKKMINTERV>-INTERVNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKKMINTERV-SORTNOMIN, sy-vline,
  WA_BKKMINTERV-SORTNOMAX, sy-vline,
  WA_BKKMINTERV-XNEWSTEP, sy-vline,
  WA_BKKMINTERV-BKKRS, sy-vline,
  WA_BKKMINTERV-LOOPCNT, sy-vline,
  WA_BKKMINTERV-COUNTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKKMINTERV 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_BKKMINTERV 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_BKKMINTERV INTO WA_BKKMINTERV.


*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 PROGNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKMINTERV-PROGNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKMINTERV-PROGNO.
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_BKKMINTERV_STR, 
MANDT TYPE STRING,
PROGN TYPE STRING,
PROGDATE TYPE STRING,
PROGNO TYPE STRING,
INTERVNO TYPE STRING,
SORTNOMIN TYPE STRING,
SORTNOMAX TYPE STRING,
XNEWSTEP TYPE STRING,
BKKRS TYPE STRING,
LOOPCNT TYPE STRING,
COUNTER TYPE STRING,
COUNTERROR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKKMINTERV_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_BKKMINTERV_STR-MANDT sy-vline 
WA_BKKMINTERV_STR-PROGN sy-vline 
WA_BKKMINTERV_STR-PROGDATE sy-vline 
WA_BKKMINTERV_STR-PROGNO sy-vline 
WA_BKKMINTERV_STR-INTERVNO sy-vline 
WA_BKKMINTERV_STR-SORTNOMIN sy-vline 
WA_BKKMINTERV_STR-SORTNOMAX sy-vline 
WA_BKKMINTERV_STR-XNEWSTEP sy-vline 
WA_BKKMINTERV_STR-BKKRS sy-vline 
WA_BKKMINTERV_STR-LOOPCNT sy-vline 
WA_BKKMINTERV_STR-COUNTER sy-vline 
WA_BKKMINTERV_STR-COUNTERROR sy-vline      INTO ld_text SEPARATED BY SPACE.

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