ABAP Select data from SAP table BKKM1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BKKM1 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 BKKM1. 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 BKKM1 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_BKKM1 TYPE STANDARD TABLE OF BKKM1,
      WA_BKKM1 TYPE BKKM1,
      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: <BKKM1> TYPE BKKM1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BKKM1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BKKM1
  INTO TABLE IT_BKKM1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKKM1
*  INTO TABLE @DATA(IT_BKKM12).
*--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_BKKM1 INDEX 1 INTO DATA(WA_BKKM12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BKKM1 ASSIGNING <BKKM1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKKM1>-MANDT = 1.
<BKKM1>-BKKRS = 1.
<BKKM1>-ACNUM_INT = 1.
<BKKM1>-ACCST_YEAR = 1.
<BKKM1>-ACCSTATNO = 1.

ENDLOOP.

LOOP AT IT_BKKM1 INTO WA_BKKM1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKKM1-ACCSTATDAT, sy-vline,
  WA_BKKM1-ACCSTTIME, sy-vline,
  WA_BKKM1-FDATEPOST, sy-vline,
  WA_BKKM1-FTIMEPOST, sy-vline,
  WA_BKKM1-FDOCNPOST, sy-vline,
  WA_BKKM1-LDATEPOST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKKM1 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_BKKM1 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_BKKM1 INTO WA_BKKM1.


*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 ACNUM_INT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKM1-ACNUM_INT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM1-ACNUM_INT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PROGNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKM1-PROGNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM1-PROGNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CURRSTARTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKM1-CURRSTARTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKM1-CURRSTARTNO.
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_BKKM1_STR, 
MANDT TYPE STRING,
BKKRS TYPE STRING,
ACNUM_INT TYPE STRING,
ACCST_YEAR TYPE STRING,
ACCSTATNO TYPE STRING,
ACCSTATDAT TYPE STRING,
ACCSTTIME TYPE STRING,
FDATEPOST TYPE STRING,
FTIMEPOST TYPE STRING,
FDOCNPOST TYPE STRING,
LDATEPOST TYPE STRING,
LTIMEPOST TYPE STRING,
LDOCNPOST TYPE STRING,
CDATEPOST TYPE STRING,
CTIMEPOST TYPE STRING,
SDATEPOSTL TYPE STRING,
SDATEPOSTH TYPE STRING,
XACCNTCLOS TYPE STRING,
SBALANCE TYPE STRING,
EBALANCE TYPE STRING,
CURRENCY TYPE STRING,
BKSTSTATUS TYPE STRING,
PROGN TYPE STRING,
PROGDATE TYPE STRING,
PROGNO TYPE STRING,
CURRSTARTNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKKM1_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_BKKM1_STR-MANDT sy-vline 
WA_BKKM1_STR-BKKRS sy-vline 
WA_BKKM1_STR-ACNUM_INT sy-vline 
WA_BKKM1_STR-ACCST_YEAR sy-vline 
WA_BKKM1_STR-ACCSTATNO sy-vline 
WA_BKKM1_STR-ACCSTATDAT sy-vline 
WA_BKKM1_STR-ACCSTTIME sy-vline 
WA_BKKM1_STR-FDATEPOST sy-vline 
WA_BKKM1_STR-FTIMEPOST sy-vline 
WA_BKKM1_STR-FDOCNPOST sy-vline 
WA_BKKM1_STR-LDATEPOST sy-vline 
WA_BKKM1_STR-LTIMEPOST sy-vline 
WA_BKKM1_STR-LDOCNPOST sy-vline 
WA_BKKM1_STR-CDATEPOST sy-vline 
WA_BKKM1_STR-CTIMEPOST sy-vline 
WA_BKKM1_STR-SDATEPOSTL sy-vline 
WA_BKKM1_STR-SDATEPOSTH sy-vline 
WA_BKKM1_STR-XACCNTCLOS sy-vline 
WA_BKKM1_STR-SBALANCE sy-vline 
WA_BKKM1_STR-EBALANCE sy-vline 
WA_BKKM1_STR-CURRENCY sy-vline 
WA_BKKM1_STR-BKSTSTATUS sy-vline 
WA_BKKM1_STR-PROGN sy-vline 
WA_BKKM1_STR-PROGDATE sy-vline 
WA_BKKM1_STR-PROGNO sy-vline 
WA_BKKM1_STR-CURRSTARTNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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