ABAP Select data from SAP table J_7LKM2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKM2 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_7LKM2. 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_7LKM2 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_7LKM2 TYPE STANDARD TABLE OF J_7LKM2,
      WA_J_7LKM2 TYPE J_7LKM2,
      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_7LKM2> TYPE J_7LKM2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKM2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKM2
  INTO TABLE IT_J_7LKM2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKM2
*  INTO TABLE @DATA(IT_J_7LKM22).
*--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_7LKM2 INDEX 1 INTO DATA(WA_J_7LKM22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKM2 ASSIGNING <J_7LKM2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKM2>-MANDT = 1.
<J_7LKM2>-MATNR = 1.
<J_7LKM2>-VARIANTE = 1.
<J_7LKM2>-MAKTG = 1.
<J_7LKM2>-MAKTX = 1.

ENDLOOP.

LOOP AT IT_J_7LKM2 INTO WA_J_7LKM2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKM2-LAND1, sy-vline,
  WA_J_7LKM2-RMATN, sy-vline,
  WA_J_7LKM2-REFTYP, sy-vline,
  WA_J_7LKM2-BUKRS, sy-vline,
  WA_J_7LKM2-BUTXT, sy-vline,
  WA_J_7LKM2-ENTNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKM2 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_7LKM2 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_7LKM2 INTO WA_J_7LKM2.


*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_7LKM2-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKM2-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field RMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKM2-RMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKM2-RMATN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKM2-ENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKM2-ENTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKM2-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKM2-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKM2-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKM2-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKM2-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKM2-GEWEI.
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_7LKM2_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
VARIANTE TYPE STRING,
MAKTG TYPE STRING,
MAKTX TYPE STRING,
LAND1 TYPE STRING,
RMATN TYPE STRING,
REFTYP TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
ENTNR TYPE STRING,
LAND2 TYPE STRING,
ENTNA TYPE STRING,
NAME1 TYPE STRING,
WERKS TYPE STRING,
MTYP TYPE STRING,
MTART TYPE STRING,
PRODH TYPE STRING,
MATKL TYPE STRING,
VRKME TYPE STRING,
MEINS TYPE STRING,
GEWEI TYPE STRING,
VRSIO TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
MSTAT1 TYPE STRING,
MSTAT2 TYPE STRING,
MSTAT3 TYPE STRING,
MSTAT4 TYPE STRING,
MSTATTXT4 TYPE STRING,
MAKTIVKZ1 TYPE STRING,
MAKTIVKZ2 TYPE STRING,
MAKTIVKZ3 TYPE STRING,
MAKTIVKZ4 TYPE STRING,
LVORM1 TYPE STRING,
LVORM2 TYPE STRING,
LVORM3 TYPE STRING,
LVORM4 TYPE STRING,
KPEIN TYPE STRING,
VPGRP TYPE STRING,
GMENG TYPE STRING,
SPLIT TYPE STRING,
PREISE TYPE STRING,
WAERE TYPE STRING,
MATNR10 TYPE STRING,
VPGRP5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKM2_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_7LKM2_STR-MANDT sy-vline 
WA_J_7LKM2_STR-MATNR sy-vline 
WA_J_7LKM2_STR-VARIANTE sy-vline 
WA_J_7LKM2_STR-MAKTG sy-vline 
WA_J_7LKM2_STR-MAKTX sy-vline 
WA_J_7LKM2_STR-LAND1 sy-vline 
WA_J_7LKM2_STR-RMATN sy-vline 
WA_J_7LKM2_STR-REFTYP sy-vline 
WA_J_7LKM2_STR-BUKRS sy-vline 
WA_J_7LKM2_STR-BUTXT sy-vline 
WA_J_7LKM2_STR-ENTNR sy-vline 
WA_J_7LKM2_STR-LAND2 sy-vline 
WA_J_7LKM2_STR-ENTNA sy-vline 
WA_J_7LKM2_STR-NAME1 sy-vline 
WA_J_7LKM2_STR-WERKS sy-vline 
WA_J_7LKM2_STR-MTYP sy-vline 
WA_J_7LKM2_STR-MTART sy-vline 
WA_J_7LKM2_STR-PRODH sy-vline 
WA_J_7LKM2_STR-MATKL sy-vline 
WA_J_7LKM2_STR-VRKME sy-vline 
WA_J_7LKM2_STR-MEINS sy-vline 
WA_J_7LKM2_STR-GEWEI sy-vline 
WA_J_7LKM2_STR-VRSIO sy-vline 
WA_J_7LKM2_STR-DATAB sy-vline 
WA_J_7LKM2_STR-DATBI sy-vline 
WA_J_7LKM2_STR-MSTAT1 sy-vline 
WA_J_7LKM2_STR-MSTAT2 sy-vline 
WA_J_7LKM2_STR-MSTAT3 sy-vline 
WA_J_7LKM2_STR-MSTAT4 sy-vline 
WA_J_7LKM2_STR-MSTATTXT4 sy-vline 
WA_J_7LKM2_STR-MAKTIVKZ1 sy-vline 
WA_J_7LKM2_STR-MAKTIVKZ2 sy-vline 
WA_J_7LKM2_STR-MAKTIVKZ3 sy-vline 
WA_J_7LKM2_STR-MAKTIVKZ4 sy-vline 
WA_J_7LKM2_STR-LVORM1 sy-vline 
WA_J_7LKM2_STR-LVORM2 sy-vline 
WA_J_7LKM2_STR-LVORM3 sy-vline 
WA_J_7LKM2_STR-LVORM4 sy-vline 
WA_J_7LKM2_STR-KPEIN sy-vline 
WA_J_7LKM2_STR-VPGRP sy-vline 
WA_J_7LKM2_STR-GMENG sy-vline 
WA_J_7LKM2_STR-SPLIT sy-vline 
WA_J_7LKM2_STR-PREISE sy-vline 
WA_J_7LKM2_STR-WAERE sy-vline 
WA_J_7LKM2_STR-MATNR10 sy-vline 
WA_J_7LKM2_STR-VPGRP5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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