ABAP Select data from SAP table BKKM3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BKKM3 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 BKKM3. 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 BKKM3 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_BKKM3 TYPE STANDARD TABLE OF BKKM3,
      WA_BKKM3 TYPE BKKM3,
      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: <BKKM3> TYPE BKKM3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BKKM3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BKKM3
  INTO TABLE IT_BKKM3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKKM3
*  INTO TABLE @DATA(IT_BKKM32).
*--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_BKKM3 INDEX 1 INTO DATA(WA_BKKM32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BKKM3 ASSIGNING <BKKM3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKKM3>-MANDT = 1.
<BKKM3>-PROGN = 1.
<BKKM3>-PROGDATE = 1.
<BKKM3>-PROGNO = 1.
<BKKM3>-RUNSTARTNO = 1.

ENDLOOP.

LOOP AT IT_BKKM3 INTO WA_BKKM3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKKM3-RUNCATG, sy-vline,
  WA_BKKM3-BKKRS, sy-vline,
  WA_BKKM3-CLOS_TYP, sy-vline,
  WA_BKKM3-CLOSETIME, sy-vline,
  WA_BKKM3-RUNDATE, sy-vline,
  WA_BKKM3-RUNTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKKM3 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_BKKM3 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_BKKM3 INTO WA_BKKM3.


*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_BKKM3-PROGNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM3-PROGNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RUNSTARTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKM3-RUNSTARTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM3-RUNSTARTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ACEXT, internal->external for field ACCOUNTGE
CALL FUNCTION 'CONVERSION_EXIT_ACEXT_OUTPUT'
  EXPORTING
    input =                      WA_BKKM3-ACCOUNTGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM3-ACCOUNTGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ACEXT, internal->external for field ACCOUNTLE
CALL FUNCTION 'CONVERSION_EXIT_ACEXT_OUTPUT'
  EXPORTING
    input =                      WA_BKKM3-ACCOUNTLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM3-ACCOUNTLE.
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_BKKM3_STR, 
MANDT TYPE STRING,
PROGN TYPE STRING,
PROGDATE TYPE STRING,
PROGNO TYPE STRING,
RUNSTARTNO TYPE STRING,
RUNCATG TYPE STRING,
BKKRS TYPE STRING,
CLOS_TYP TYPE STRING,
CLOSETIME TYPE STRING,
RUNDATE TYPE STRING,
RUNTIME TYPE STRING,
RUNUSER TYPE STRING,
ACCOUNTGE TYPE STRING,
ACCOUNTLE TYPE STRING,
ACURRENCY TYPE STRING,
CLOSEDATE TYPE STRING,
XACCRUAL TYPE STRING,
XFEEACCR TYPE STRING,
TRACE TYPE STRING,
SIM_RUN TYPE STRING,
TOLERANCE TYPE STRING,
CURR TYPE STRING,
CLOSEDATE_CC TYPE STRING,
VAL_DAT_TO TYPE STRING,
ROUND_POS TYPE STRING,
X_SIM_RUN TYPE STRING,
BANKSTATDATE TYPE STRING,
FDATEPOST TYPE STRING,
FTIMEPOST TYPE STRING,
XSIMULBKST TYPE STRING,
XSCREENOUT TYPE STRING,
XBKSTNOITEM TYPE STRING,
XDUPLICATE TYPE STRING,
DUPLDATEFROM TYPE STRING,
DUPLDATETO TYPE STRING,
TRACELOG TYPE STRING,
PRODINT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKKM3_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_BKKM3_STR-MANDT sy-vline 
WA_BKKM3_STR-PROGN sy-vline 
WA_BKKM3_STR-PROGDATE sy-vline 
WA_BKKM3_STR-PROGNO sy-vline 
WA_BKKM3_STR-RUNSTARTNO sy-vline 
WA_BKKM3_STR-RUNCATG sy-vline 
WA_BKKM3_STR-BKKRS sy-vline 
WA_BKKM3_STR-CLOS_TYP sy-vline 
WA_BKKM3_STR-CLOSETIME sy-vline 
WA_BKKM3_STR-RUNDATE sy-vline 
WA_BKKM3_STR-RUNTIME sy-vline 
WA_BKKM3_STR-RUNUSER sy-vline 
WA_BKKM3_STR-ACCOUNTGE sy-vline 
WA_BKKM3_STR-ACCOUNTLE sy-vline 
WA_BKKM3_STR-ACURRENCY sy-vline 
WA_BKKM3_STR-CLOSEDATE sy-vline 
WA_BKKM3_STR-XACCRUAL sy-vline 
WA_BKKM3_STR-XFEEACCR sy-vline 
WA_BKKM3_STR-TRACE sy-vline 
WA_BKKM3_STR-SIM_RUN sy-vline 
WA_BKKM3_STR-TOLERANCE sy-vline 
WA_BKKM3_STR-CURR sy-vline 
WA_BKKM3_STR-CLOSEDATE_CC sy-vline 
WA_BKKM3_STR-VAL_DAT_TO sy-vline 
WA_BKKM3_STR-ROUND_POS sy-vline 
WA_BKKM3_STR-X_SIM_RUN sy-vline 
WA_BKKM3_STR-BANKSTATDATE sy-vline 
WA_BKKM3_STR-FDATEPOST sy-vline 
WA_BKKM3_STR-FTIMEPOST sy-vline 
WA_BKKM3_STR-XSIMULBKST sy-vline 
WA_BKKM3_STR-XSCREENOUT sy-vline 
WA_BKKM3_STR-XBKSTNOITEM sy-vline 
WA_BKKM3_STR-XDUPLICATE sy-vline 
WA_BKKM3_STR-DUPLDATEFROM sy-vline 
WA_BKKM3_STR-DUPLDATETO sy-vline 
WA_BKKM3_STR-TRACELOG sy-vline 
WA_BKKM3_STR-PRODINT sy-vline      INTO ld_text SEPARATED BY SPACE.

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