ABAP Select data from SAP table J_7LKCM1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKCM1 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 J_7LKCM1. 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 J_7LKCM1 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_J_7LKCM1 TYPE STANDARD TABLE OF J_7LKCM1,
      WA_J_7LKCM1 TYPE J_7LKCM1,
      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: <J_7LKCM1> TYPE J_7LKCM1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKCM1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKCM1
  INTO TABLE IT_J_7LKCM1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKCM1
*  INTO TABLE @DATA(IT_J_7LKCM12).
*--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_J_7LKCM1 INDEX 1 INTO DATA(WA_J_7LKCM12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKCM1 ASSIGNING <J_7LKCM1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKCM1>-MANDT = 1.
<J_7LKCM1>-MATNR = 1.
<J_7LKCM1>-MAKTX = 1.
<J_7LKCM1>-EAN11 = 1.
<J_7LKCM1>-VARIANTE = 1.

ENDLOOP.

LOOP AT IT_J_7LKCM1 INTO WA_J_7LKCM1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKCM1-BUKRS, sy-vline,
  WA_J_7LKCM1-LAND1, sy-vline,
  WA_J_7LKCM1-ENTNR, sy-vline,
  WA_J_7LKCM1-VKORG, sy-vline,
  WA_J_7LKCM1-VTWEG, sy-vline,
  WA_J_7LKCM1-SPART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKCM1 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_J_7LKCM1 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_J_7LKCM1 INTO WA_J_7LKCM1.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-EAN11.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-ENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-ENTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-HKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-HKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKCM1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKCM1-MEINS.
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_J_7LKCM1_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
EAN11 TYPE STRING,
VARIANTE TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
ENTNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
WERKS TYPE STRING,
LLAND TYPE STRING,
KUMRK TYPE STRING,
KUNNR TYPE STRING,
EKORG TYPE STRING,
LIMRK TYPE STRING,
LIFNR TYPE STRING,
MTART TYPE STRING,
GRUPPE TYPE STRING,
MATKL TYPE STRING,
PRDHA TYPE STRING,
MBRSH TYPE STRING,
GSBER TYPE STRING,
HKUNNR TYPE STRING,
HVKORG TYPE STRING,
HVTWEG TYPE STRING,
HSPART TYPE STRING,
HITYP TYPE STRING,
HISTUNR TYPE STRING,
POSAR TYPE STRING,
POSAR2 TYPE STRING,
KOART TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
NETWR TYPE STRING,
PGAAWR TYPE STRING,
WAERK TYPE STRING,
FKIMG TYPE STRING,
MEINS TYPE STRING,
FKIMP TYPE STRING,
KOKEY TYPE STRING,
KZPRAD TYPE STRING,
SPLIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKCM1_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_J_7LKCM1_STR-MANDT sy-vline 
WA_J_7LKCM1_STR-MATNR sy-vline 
WA_J_7LKCM1_STR-MAKTX sy-vline 
WA_J_7LKCM1_STR-EAN11 sy-vline 
WA_J_7LKCM1_STR-VARIANTE sy-vline 
WA_J_7LKCM1_STR-BUKRS sy-vline 
WA_J_7LKCM1_STR-LAND1 sy-vline 
WA_J_7LKCM1_STR-ENTNR sy-vline 
WA_J_7LKCM1_STR-VKORG sy-vline 
WA_J_7LKCM1_STR-VTWEG sy-vline 
WA_J_7LKCM1_STR-SPART sy-vline 
WA_J_7LKCM1_STR-WERKS sy-vline 
WA_J_7LKCM1_STR-LLAND sy-vline 
WA_J_7LKCM1_STR-KUMRK sy-vline 
WA_J_7LKCM1_STR-KUNNR sy-vline 
WA_J_7LKCM1_STR-EKORG sy-vline 
WA_J_7LKCM1_STR-LIMRK sy-vline 
WA_J_7LKCM1_STR-LIFNR sy-vline 
WA_J_7LKCM1_STR-MTART sy-vline 
WA_J_7LKCM1_STR-GRUPPE sy-vline 
WA_J_7LKCM1_STR-MATKL sy-vline 
WA_J_7LKCM1_STR-PRDHA sy-vline 
WA_J_7LKCM1_STR-MBRSH sy-vline 
WA_J_7LKCM1_STR-GSBER sy-vline 
WA_J_7LKCM1_STR-HKUNNR sy-vline 
WA_J_7LKCM1_STR-HVKORG sy-vline 
WA_J_7LKCM1_STR-HVTWEG sy-vline 
WA_J_7LKCM1_STR-HSPART sy-vline 
WA_J_7LKCM1_STR-HITYP sy-vline 
WA_J_7LKCM1_STR-HISTUNR sy-vline 
WA_J_7LKCM1_STR-POSAR sy-vline 
WA_J_7LKCM1_STR-POSAR2 sy-vline 
WA_J_7LKCM1_STR-KOART sy-vline 
WA_J_7LKCM1_STR-DATAB sy-vline 
WA_J_7LKCM1_STR-DATBI sy-vline 
WA_J_7LKCM1_STR-NETWR sy-vline 
WA_J_7LKCM1_STR-PGAAWR sy-vline 
WA_J_7LKCM1_STR-WAERK sy-vline 
WA_J_7LKCM1_STR-FKIMG sy-vline 
WA_J_7LKCM1_STR-MEINS sy-vline 
WA_J_7LKCM1_STR-FKIMP sy-vline 
WA_J_7LKCM1_STR-KOKEY sy-vline 
WA_J_7LKCM1_STR-KZPRAD sy-vline 
WA_J_7LKCM1_STR-SPLIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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