ABAP Select data from SAP table J_7LKW4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKW4 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_7LKW4. 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_7LKW4 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_7LKW4 TYPE STANDARD TABLE OF J_7LKW4,
      WA_J_7LKW4 TYPE J_7LKW4,
      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_7LKW4> TYPE J_7LKW4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKW4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKW4
  INTO TABLE IT_J_7LKW4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKW4
*  INTO TABLE @DATA(IT_J_7LKW42).
*--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_7LKW4 INDEX 1 INTO DATA(WA_J_7LKW42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKW4 ASSIGNING <J_7LKW4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKW4>-ENTNR = 1.
<J_7LKW4>-DATAB = 1.
<J_7LKW4>-MATNR10 = 1.
<J_7LKW4>-MAKTX = 1.
<J_7LKW4>-MATNR = 1.

ENDLOOP.

LOOP AT IT_J_7LKW4 INTO WA_J_7LKW4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKW4-VARIANTE, sy-vline,
  WA_J_7LKW4-VRKME, sy-vline,
  WA_J_7LKW4-EANNR, sy-vline,
  WA_J_7LKW4-VPGRP5, sy-vline,
  WA_J_7LKW4-MSTAT, sy-vline,
  WA_J_7LKW4-STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKW4 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_7LKW4 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_7LKW4 INTO WA_J_7LKW4.


*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 ENTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKW4-ENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKW4-ENTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKW4-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKW4-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKW4-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKW4-VRKME.
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_7LKW4_STR, 
ENTNR TYPE STRING,
DATAB TYPE STRING,
MATNR10 TYPE STRING,
MAKTX TYPE STRING,
MATNR TYPE STRING,
VARIANTE TYPE STRING,
VRKME TYPE STRING,
EANNR TYPE STRING,
VPGRP5 TYPE STRING,
MSTAT TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKW4_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_7LKW4_STR-ENTNR sy-vline 
WA_J_7LKW4_STR-DATAB sy-vline 
WA_J_7LKW4_STR-MATNR10 sy-vline 
WA_J_7LKW4_STR-MAKTX sy-vline 
WA_J_7LKW4_STR-MATNR sy-vline 
WA_J_7LKW4_STR-VARIANTE sy-vline 
WA_J_7LKW4_STR-VRKME sy-vline 
WA_J_7LKW4_STR-EANNR sy-vline 
WA_J_7LKW4_STR-VPGRP5 sy-vline 
WA_J_7LKW4_STR-MSTAT sy-vline 
WA_J_7LKW4_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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