ABAP Select data from SAP table J_7LKM04 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKM04 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_7LKM04. 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_7LKM04 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_7LKM04 TYPE STANDARD TABLE OF J_7LKM04,
      WA_J_7LKM04 TYPE J_7LKM04,
      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_7LKM04> TYPE J_7LKM04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKM04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKM04
  INTO TABLE IT_J_7LKM04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKM04
*  INTO TABLE @DATA(IT_J_7LKM042).
*--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_7LKM04 INDEX 1 INTO DATA(WA_J_7LKM042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKM04 ASSIGNING <J_7LKM04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKM04>-LFDNR = 1.
<J_7LKM04>-MATNR = 1.
<J_7LKM04>-BUKRS = 1.
<J_7LKM04>-LAND1 = 1.
<J_7LKM04>-VRKME = 1.

ENDLOOP.

LOOP AT IT_J_7LKM04 INTO WA_J_7LKM04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKM04-VRPNR, sy-vline,
  WA_J_7LKM04-DATBI, sy-vline,
  WA_J_7LKM04-DATAB, sy-vline,
  WA_J_7LKM04-VRSIO, sy-vline,
  WA_J_7LKM04-KPEIN, sy-vline,
  WA_J_7LKM04-MEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKM04 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_7LKM04 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_7LKM04 INTO WA_J_7LKM04.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_J_7LKM04_STR, 
LFDNR TYPE STRING,
MATNR TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
VRKME TYPE STRING,
VRPNR TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
VRSIO TYPE STRING,
KPEIN TYPE STRING,
MEINS TYPE STRING,
FMENG TYPE STRING,
VPEBENE TYPE STRING,
BLISTER TYPE STRING,
BREITE TYPE STRING,
LAENG TYPE STRING,
LANEH TYPE STRING,
KZSTKENTG TYPE STRING,
KZGEWENTG TYPE STRING,
SOKOA TYPE STRING,
LOEKZ TYPE STRING,
VPGRP TYPE STRING,
VERSCHNITT TYPE STRING,
FAKTOR TYPE STRING,
BLVFLKL TYPE STRING,
INFOK TYPE STRING,
FUELLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKM04_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_7LKM04_STR-LFDNR sy-vline 
WA_J_7LKM04_STR-MATNR sy-vline 
WA_J_7LKM04_STR-BUKRS sy-vline 
WA_J_7LKM04_STR-LAND1 sy-vline 
WA_J_7LKM04_STR-VRKME sy-vline 
WA_J_7LKM04_STR-VRPNR sy-vline 
WA_J_7LKM04_STR-DATBI sy-vline 
WA_J_7LKM04_STR-DATAB sy-vline 
WA_J_7LKM04_STR-VRSIO sy-vline 
WA_J_7LKM04_STR-KPEIN sy-vline 
WA_J_7LKM04_STR-MEINS sy-vline 
WA_J_7LKM04_STR-FMENG sy-vline 
WA_J_7LKM04_STR-VPEBENE sy-vline 
WA_J_7LKM04_STR-BLISTER sy-vline 
WA_J_7LKM04_STR-BREITE sy-vline 
WA_J_7LKM04_STR-LAENG sy-vline 
WA_J_7LKM04_STR-LANEH sy-vline 
WA_J_7LKM04_STR-KZSTKENTG sy-vline 
WA_J_7LKM04_STR-KZGEWENTG sy-vline 
WA_J_7LKM04_STR-SOKOA sy-vline 
WA_J_7LKM04_STR-LOEKZ sy-vline 
WA_J_7LKM04_STR-VPGRP sy-vline 
WA_J_7LKM04_STR-VERSCHNITT sy-vline 
WA_J_7LKM04_STR-FAKTOR sy-vline 
WA_J_7LKM04_STR-BLVFLKL sy-vline 
WA_J_7LKM04_STR-INFOK sy-vline 
WA_J_7LKM04_STR-FUELLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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