ABAP Select data from SAP table J_7LKB4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKB4 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_7LKB4. 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_7LKB4 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_7LKB4 TYPE STANDARD TABLE OF J_7LKB4,
      WA_J_7LKB4 TYPE J_7LKB4,
      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_7LKB4> TYPE J_7LKB4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKB4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKB4
  INTO TABLE IT_J_7LKB4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKB4
*  INTO TABLE @DATA(IT_J_7LKB42).
*--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_7LKB4 INDEX 1 INTO DATA(WA_J_7LKB42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKB4 ASSIGNING <J_7LKB4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKB4>-ENTNR = 1.
<J_7LKB4>-MATNR = 1.
<J_7LKB4>-VARIANTE = 1.
<J_7LKB4>-BUKRS = 1.
<J_7LKB4>-LAND1 = 1.

ENDLOOP.

LOOP AT IT_J_7LKB4 INTO WA_J_7LKB4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKB4-VKORG, sy-vline,
  WA_J_7LKB4-VTWEG, sy-vline,
  WA_J_7LKB4-SPART, sy-vline,
  WA_J_7LKB4-KUMRK, sy-vline,
  WA_J_7LKB4-KUNNR, sy-vline,
  WA_J_7LKB4-EKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKB4 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_7LKB4 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_7LKB4 INTO WA_J_7LKB4.


*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_7LKB4-ENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-ENTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KONMS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-KONMS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-KONMS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-KMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KMEINU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKB4-KMEINU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKB4-KMEINU.
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_7LKB4_STR, 
ENTNR TYPE STRING,
MATNR TYPE STRING,
VARIANTE TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KUMRK TYPE STRING,
KUNNR TYPE STRING,
EKORG TYPE STRING,
LIMRK TYPE STRING,
LIFNR TYPE STRING,
VRKME TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
KSTBM TYPE STRING,
KONMS TYPE STRING,
KBETR TYPE STRING,
KBETRU TYPE STRING,
KONWA TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KPEINU TYPE STRING,
KMEINU TYPE STRING,
SPLIT TYPE STRING,
KOKEY TYPE STRING,
SPLIT_MAN TYPE STRING,
MKZRE TYPE STRING,
KVEWE TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
STATUS TYPE STRING,
KQUELLSCHL TYPE STRING,
KQUELLSCHLZ TYPE STRING,
VTWKU TYPE STRING,
SPAKU TYPE STRING,
VGTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKB4_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_7LKB4_STR-ENTNR sy-vline 
WA_J_7LKB4_STR-MATNR sy-vline 
WA_J_7LKB4_STR-VARIANTE sy-vline 
WA_J_7LKB4_STR-BUKRS sy-vline 
WA_J_7LKB4_STR-LAND1 sy-vline 
WA_J_7LKB4_STR-VKORG sy-vline 
WA_J_7LKB4_STR-VTWEG sy-vline 
WA_J_7LKB4_STR-SPART sy-vline 
WA_J_7LKB4_STR-KUMRK sy-vline 
WA_J_7LKB4_STR-KUNNR sy-vline 
WA_J_7LKB4_STR-EKORG sy-vline 
WA_J_7LKB4_STR-LIMRK sy-vline 
WA_J_7LKB4_STR-LIFNR sy-vline 
WA_J_7LKB4_STR-VRKME sy-vline 
WA_J_7LKB4_STR-DATAB sy-vline 
WA_J_7LKB4_STR-DATBI sy-vline 
WA_J_7LKB4_STR-KSTBM sy-vline 
WA_J_7LKB4_STR-KONMS sy-vline 
WA_J_7LKB4_STR-KBETR sy-vline 
WA_J_7LKB4_STR-KBETRU sy-vline 
WA_J_7LKB4_STR-KONWA sy-vline 
WA_J_7LKB4_STR-KPEIN sy-vline 
WA_J_7LKB4_STR-KMEIN sy-vline 
WA_J_7LKB4_STR-KPEINU sy-vline 
WA_J_7LKB4_STR-KMEINU sy-vline 
WA_J_7LKB4_STR-SPLIT sy-vline 
WA_J_7LKB4_STR-KOKEY sy-vline 
WA_J_7LKB4_STR-SPLIT_MAN sy-vline 
WA_J_7LKB4_STR-MKZRE sy-vline 
WA_J_7LKB4_STR-KVEWE sy-vline 
WA_J_7LKB4_STR-KAPPL sy-vline 
WA_J_7LKB4_STR-KSCHL sy-vline 
WA_J_7LKB4_STR-STATUS sy-vline 
WA_J_7LKB4_STR-KQUELLSCHL sy-vline 
WA_J_7LKB4_STR-KQUELLSCHLZ sy-vline 
WA_J_7LKB4_STR-VTWKU sy-vline 
WA_J_7LKB4_STR-SPAKU sy-vline 
WA_J_7LKB4_STR-VGTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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