ABAP Select data from SAP table BKKMDISPINTERV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKKMDISPINTERV
*  INTO TABLE @DATA(IT_BKKMDISPINTERV2).
*--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_BKKMDISPINTERV INDEX 1 INTO DATA(WA_BKKMDISPINTERV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKKMDISPINTERV>-MANDT = 1.
<BKKMDISPINTERV>-DISPID = 1.
<BKKMDISPINTERV>-INTERVNO = 1.
<BKKMDISPINTERV>-INTVGROUP = 1.
<BKKMDISPINTERV>-OBJNOMIN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKKMDISPINTERV-OBJNOMAX, sy-vline,
  WA_BKKMDISPINTERV-LOOPCNT1, sy-vline,
  WA_BKKMDISPINTERV-CNTALL, sy-vline,
  WA_BKKMDISPINTERV-CNTCURR, sy-vline,
  WA_BKKMDISPINTERV-CNTRESTART, sy-vline,
  WA_BKKMDISPINTERV-CNTBATCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKKMDISPINTERV 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_BKKMDISPINTERV 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_BKKMDISPINTERV INTO WA_BKKMDISPINTERV.


*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 LOOPCNT1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKMDISPINTERV-LOOPCNT1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKMDISPINTERV-LOOPCNT1.
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_BKKMDISPINTERV_STR, 
MANDT TYPE STRING,
DISPID TYPE STRING,
INTERVNO TYPE STRING,
INTVGROUP TYPE STRING,
OBJNOMIN TYPE STRING,
OBJNOMAX TYPE STRING,
LOOPCNT1 TYPE STRING,
CNTALL TYPE STRING,
CNTCURR TYPE STRING,
CNTRESTART TYPE STRING,
CNTBATCH TYPE STRING,
INTVSTATUS TYPE STRING,
CNTREQUEST TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
X_INTV_IN_PROC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKKMDISPINTERV_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_BKKMDISPINTERV_STR-MANDT sy-vline 
WA_BKKMDISPINTERV_STR-DISPID sy-vline 
WA_BKKMDISPINTERV_STR-INTERVNO sy-vline 
WA_BKKMDISPINTERV_STR-INTVGROUP sy-vline 
WA_BKKMDISPINTERV_STR-OBJNOMIN sy-vline 
WA_BKKMDISPINTERV_STR-OBJNOMAX sy-vline 
WA_BKKMDISPINTERV_STR-LOOPCNT1 sy-vline 
WA_BKKMDISPINTERV_STR-CNTALL sy-vline 
WA_BKKMDISPINTERV_STR-CNTCURR sy-vline 
WA_BKKMDISPINTERV_STR-CNTRESTART sy-vline 
WA_BKKMDISPINTERV_STR-CNTBATCH sy-vline 
WA_BKKMDISPINTERV_STR-INTVSTATUS sy-vline 
WA_BKKMDISPINTERV_STR-CNTREQUEST sy-vline 
WA_BKKMDISPINTERV_STR-JOBNAME sy-vline 
WA_BKKMDISPINTERV_STR-JOBCOUNT sy-vline 
WA_BKKMDISPINTERV_STR-X_INTV_IN_PROC sy-vline      INTO ld_text SEPARATED BY SPACE.

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