ABAP Select data from SAP table J_7LKMPOS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKMPOS 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_7LKMPOS. 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_7LKMPOS 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_7LKMPOS TYPE STANDARD TABLE OF J_7LKMPOS,
      WA_J_7LKMPOS TYPE J_7LKMPOS,
      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_7LKMPOS> TYPE J_7LKMPOS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKMPOS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKMPOS
  INTO TABLE IT_J_7LKMPOS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKMPOS
*  INTO TABLE @DATA(IT_J_7LKMPOS2).
*--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_7LKMPOS INDEX 1 INTO DATA(WA_J_7LKMPOS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKMPOS ASSIGNING <J_7LKMPOS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKMPOS>-VPEBENE = 1.
<J_7LKMPOS>-VPARTG = 1.
<J_7LKMPOS>-VPARTS = 1.
<J_7LKMPOS>-VRPKT = 1.
<J_7LKMPOS>-FUELLG = 1.

ENDLOOP.

LOOP AT IT_J_7LKMPOS INTO WA_J_7LKMPOS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKMPOS-INFOK, sy-vline,
  WA_J_7LKMPOS-HDLST, sy-vline,
  WA_J_7LKMPOS-KPROZH, sy-vline,
  WA_J_7LKMPOS-VKORG, sy-vline,
  WA_J_7LKMPOS-VTWEG, sy-vline,
  WA_J_7LKMPOS-SPART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKMPOS 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_7LKMPOS 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_7LKMPOS INTO WA_J_7LKMPOS.


*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 HKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKMPOS-HKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKMPOS-HKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field HPARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKMPOS-HPARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKMPOS-HPARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKMPOS-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKMPOS-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEIM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKMPOS-GEWEIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKMPOS-GEWEIM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VRPNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKMPOS-VRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKMPOS-VRPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINSV
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKMPOS-MEINSV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKMPOS-MEINSV.
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_7LKMPOS_STR, 
VPEBENE TYPE STRING,
VPARTG TYPE STRING,
VPARTS TYPE STRING,
VRPKT TYPE STRING,
FUELLG TYPE STRING,
INFOK TYPE STRING,
HDLST TYPE STRING,
KPROZH TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
GSBER TYPE STRING,
WERKS TYPE STRING,
LLAND TYPE STRING,
MTART TYPE STRING,
MBRSH TYPE STRING,
MATKL TYPE STRING,
PRDHA TYPE STRING,
HKUNNR TYPE STRING,
HVKORG TYPE STRING,
HVTWEG TYPE STRING,
HSPART TYPE STRING,
HPARVW TYPE STRING,
GRUPPE TYPE STRING,
VRKME TYPE STRING,
STGEWM TYPE STRING,
GEWEIM TYPE STRING,
VRPNR TYPE STRING,
KPEINV TYPE STRING,
MEINSV TYPE STRING,
FMENGV TYPE STRING,
VVARIANTE TYPE STRING,
VARIANTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKMPOS_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_7LKMPOS_STR-VPEBENE sy-vline 
WA_J_7LKMPOS_STR-VPARTG sy-vline 
WA_J_7LKMPOS_STR-VPARTS sy-vline 
WA_J_7LKMPOS_STR-VRPKT sy-vline 
WA_J_7LKMPOS_STR-FUELLG sy-vline 
WA_J_7LKMPOS_STR-INFOK sy-vline 
WA_J_7LKMPOS_STR-HDLST sy-vline 
WA_J_7LKMPOS_STR-KPROZH sy-vline 
WA_J_7LKMPOS_STR-VKORG sy-vline 
WA_J_7LKMPOS_STR-VTWEG sy-vline 
WA_J_7LKMPOS_STR-SPART sy-vline 
WA_J_7LKMPOS_STR-GSBER sy-vline 
WA_J_7LKMPOS_STR-WERKS sy-vline 
WA_J_7LKMPOS_STR-LLAND sy-vline 
WA_J_7LKMPOS_STR-MTART sy-vline 
WA_J_7LKMPOS_STR-MBRSH sy-vline 
WA_J_7LKMPOS_STR-MATKL sy-vline 
WA_J_7LKMPOS_STR-PRDHA sy-vline 
WA_J_7LKMPOS_STR-HKUNNR sy-vline 
WA_J_7LKMPOS_STR-HVKORG sy-vline 
WA_J_7LKMPOS_STR-HVTWEG sy-vline 
WA_J_7LKMPOS_STR-HSPART sy-vline 
WA_J_7LKMPOS_STR-HPARVW sy-vline 
WA_J_7LKMPOS_STR-GRUPPE sy-vline 
WA_J_7LKMPOS_STR-VRKME sy-vline 
WA_J_7LKMPOS_STR-STGEWM sy-vline 
WA_J_7LKMPOS_STR-GEWEIM sy-vline 
WA_J_7LKMPOS_STR-VRPNR sy-vline 
WA_J_7LKMPOS_STR-KPEINV sy-vline 
WA_J_7LKMPOS_STR-MEINSV sy-vline 
WA_J_7LKMPOS_STR-FMENGV sy-vline 
WA_J_7LKMPOS_STR-VVARIANTE sy-vline 
WA_J_7LKMPOS_STR-VARIANTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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