ABAP Select data from SAP table KMA1L into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KMA1L 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 KMA1L. 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 KMA1L 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_KMA1L TYPE STANDARD TABLE OF KMA1L,
      WA_KMA1L TYPE KMA1L,
      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: <KMA1L> TYPE KMA1L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KMA1L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KMA1L
  INTO TABLE IT_KMA1L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KMA1L
*  INTO TABLE @DATA(IT_KMA1L2).
*--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_KMA1L INDEX 1 INTO DATA(WA_KMA1L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KMA1L ASSIGNING <KMA1L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KMA1L>-KOKRS = 1.
<KMA1L>-KOSTL = 1.
<KMA1L>-AKOST = 1.
<KMA1L>-BKOST = 1.
<KMA1L>-DATBI = 1.

ENDLOOP.

LOOP AT IT_KMA1L INTO WA_KMA1L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KMA1L-DATAB, sy-vline,
  WA_KMA1L-BKZKP, sy-vline,
  WA_KMA1L-BKZKS, sy-vline,
  WA_KMA1L-BKZER, sy-vline,
  WA_KMA1L-BKZOB, sy-vline,
  WA_KMA1L-PKZKP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KMA1L 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_KMA1L 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_KMA1L INTO WA_KMA1L.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKOST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-AKOST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-AKOST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BKOST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-BKOST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-BKOST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NKOST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-NKOST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-NKOST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-RECID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-ETYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-ETYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KMA1L-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KMA1L-PRCTR.
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_KMA1L_STR, 
KOKRS TYPE STRING,
KOSTL TYPE STRING,
AKOST TYPE STRING,
BKOST TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
BKZKP TYPE STRING,
BKZKS TYPE STRING,
BKZER TYPE STRING,
BKZOB TYPE STRING,
PKZKP TYPE STRING,
PKZKS TYPE STRING,
PKZER TYPE STRING,
VMETH TYPE STRING,
MGEFL TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
ABTEI TYPE STRING,
KOSAR TYPE STRING,
VERAK TYPE STRING,
WAERS TYPE STRING,
NKOST TYPE STRING,
LAND1 TYPE STRING,
ANRED TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
STRAS TYPE STRING,
PFACH TYPE STRING,
PSTLZ TYPE STRING,
PSTL2 TYPE STRING,
REGIO TYPE STRING,
SPRAS TYPE STRING,
TELBX TYPE STRING,
TELF1 TYPE STRING,
TELF2 TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,
TELX1 TYPE STRING,
DATLT TYPE STRING,
DRNAM TYPE STRING,
KHINR TYPE STRING,
CCKEY TYPE STRING,
OBJNR TYPE STRING,
FUNKT TYPE STRING,
AFUNK TYPE STRING,
TXJCD TYPE STRING,
VNAME TYPE STRING,
RECID TYPE STRING,
ETYPE TYPE STRING,
PRCTR TYPE STRING,
FRAME_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KMA1L_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_KMA1L_STR-KOKRS sy-vline 
WA_KMA1L_STR-KOSTL sy-vline 
WA_KMA1L_STR-AKOST sy-vline 
WA_KMA1L_STR-BKOST sy-vline 
WA_KMA1L_STR-DATBI sy-vline 
WA_KMA1L_STR-DATAB sy-vline 
WA_KMA1L_STR-BKZKP sy-vline 
WA_KMA1L_STR-BKZKS sy-vline 
WA_KMA1L_STR-BKZER sy-vline 
WA_KMA1L_STR-BKZOB sy-vline 
WA_KMA1L_STR-PKZKP sy-vline 
WA_KMA1L_STR-PKZKS sy-vline 
WA_KMA1L_STR-PKZER sy-vline 
WA_KMA1L_STR-VMETH sy-vline 
WA_KMA1L_STR-MGEFL sy-vline 
WA_KMA1L_STR-BUKRS sy-vline 
WA_KMA1L_STR-GSBER sy-vline 
WA_KMA1L_STR-ABTEI sy-vline 
WA_KMA1L_STR-KOSAR sy-vline 
WA_KMA1L_STR-VERAK sy-vline 
WA_KMA1L_STR-WAERS sy-vline 
WA_KMA1L_STR-NKOST sy-vline 
WA_KMA1L_STR-LAND1 sy-vline 
WA_KMA1L_STR-ANRED sy-vline 
WA_KMA1L_STR-NAME1 sy-vline 
WA_KMA1L_STR-NAME2 sy-vline 
WA_KMA1L_STR-NAME3 sy-vline 
WA_KMA1L_STR-NAME4 sy-vline 
WA_KMA1L_STR-ORT01 sy-vline 
WA_KMA1L_STR-ORT02 sy-vline 
WA_KMA1L_STR-STRAS sy-vline 
WA_KMA1L_STR-PFACH sy-vline 
WA_KMA1L_STR-PSTLZ sy-vline 
WA_KMA1L_STR-PSTL2 sy-vline 
WA_KMA1L_STR-REGIO sy-vline 
WA_KMA1L_STR-SPRAS sy-vline 
WA_KMA1L_STR-TELBX sy-vline 
WA_KMA1L_STR-TELF1 sy-vline 
WA_KMA1L_STR-TELF2 sy-vline 
WA_KMA1L_STR-TELFX sy-vline 
WA_KMA1L_STR-TELTX sy-vline 
WA_KMA1L_STR-TELX1 sy-vline 
WA_KMA1L_STR-DATLT sy-vline 
WA_KMA1L_STR-DRNAM sy-vline 
WA_KMA1L_STR-KHINR sy-vline 
WA_KMA1L_STR-CCKEY sy-vline 
WA_KMA1L_STR-OBJNR sy-vline 
WA_KMA1L_STR-FUNKT sy-vline 
WA_KMA1L_STR-AFUNK sy-vline 
WA_KMA1L_STR-TXJCD sy-vline 
WA_KMA1L_STR-VNAME sy-vline 
WA_KMA1L_STR-RECID sy-vline 
WA_KMA1L_STR-ETYPE sy-vline 
WA_KMA1L_STR-PRCTR sy-vline 
WA_KMA1L_STR-FRAME_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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