ABAP Select data from SAP table J_7LKBDCMSG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKBDCMSG 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_7LKBDCMSG. 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_7LKBDCMSG 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_7LKBDCMSG TYPE STANDARD TABLE OF J_7LKBDCMSG,
      WA_J_7LKBDCMSG TYPE J_7LKBDCMSG,
      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_7LKBDCMSG> TYPE J_7LKBDCMSG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKBDCMSG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKBDCMSG
  INTO TABLE IT_J_7LKBDCMSG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKBDCMSG
*  INTO TABLE @DATA(IT_J_7LKBDCMSG2).
*--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_7LKBDCMSG INDEX 1 INTO DATA(WA_J_7LKBDCMSG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKBDCMSG ASSIGNING <J_7LKBDCMSG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKBDCMSG>-MATNR = 1.
<J_7LKBDCMSG>-BUKRS = 1.
<J_7LKBDCMSG>-LAND1 = 1.
<J_7LKBDCMSG>-VRKME = 1.
<J_7LKBDCMSG>-VARIANTE = 1.

ENDLOOP.

LOOP AT IT_J_7LKBDCMSG INTO WA_J_7LKBDCMSG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKBDCMSG-ENTNR, sy-vline,
  WA_J_7LKBDCMSG-VKORG, sy-vline,
  WA_J_7LKBDCMSG-VTWEG, sy-vline,
  WA_J_7LKBDCMSG-SPART, sy-vline,
  WA_J_7LKBDCMSG-KUMRK, sy-vline,
  WA_J_7LKBDCMSG-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKBDCMSG 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_7LKBDCMSG 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_7LKBDCMSG INTO WA_J_7LKBDCMSG.


*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_7LKBDCMSG-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKBDCMSG-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKBDCMSG-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKBDCMSG-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKBDCMSG-ENTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKBDCMSG-ENTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKBDCMSG-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKBDCMSG-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKBDCMSG-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKBDCMSG-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MSGSPRA
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKBDCMSG-MSGSPRA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKBDCMSG-MSGSPRA.
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_7LKBDCMSG_STR, 
MATNR TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
VRKME TYPE STRING,
VARIANTE TYPE STRING,
ENTNR 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,
DATAB TYPE STRING,
DATBI TYPE STRING,
KVEWE TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
VGTYP TYPE STRING,
TCODE TYPE STRING,
DYNAME TYPE STRING,
DYNUMB TYPE STRING,
MSGTYP TYPE STRING,
MSGSPRA TYPE STRING,
MSGID TYPE STRING,
MSGNR TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
ENV TYPE STRING,
FLDNAME TYPE STRING,
KINDX TYPE STRING,
PINDX TYPE STRING,
ERSDAADM TYPE STRING,
ERZETADM TYPE STRING,
ERNAMADM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKBDCMSG_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_7LKBDCMSG_STR-MATNR sy-vline 
WA_J_7LKBDCMSG_STR-BUKRS sy-vline 
WA_J_7LKBDCMSG_STR-LAND1 sy-vline 
WA_J_7LKBDCMSG_STR-VRKME sy-vline 
WA_J_7LKBDCMSG_STR-VARIANTE sy-vline 
WA_J_7LKBDCMSG_STR-ENTNR sy-vline 
WA_J_7LKBDCMSG_STR-VKORG sy-vline 
WA_J_7LKBDCMSG_STR-VTWEG sy-vline 
WA_J_7LKBDCMSG_STR-SPART sy-vline 
WA_J_7LKBDCMSG_STR-KUMRK sy-vline 
WA_J_7LKBDCMSG_STR-KUNNR sy-vline 
WA_J_7LKBDCMSG_STR-EKORG sy-vline 
WA_J_7LKBDCMSG_STR-LIMRK sy-vline 
WA_J_7LKBDCMSG_STR-LIFNR sy-vline 
WA_J_7LKBDCMSG_STR-DATAB sy-vline 
WA_J_7LKBDCMSG_STR-DATBI sy-vline 
WA_J_7LKBDCMSG_STR-KVEWE sy-vline 
WA_J_7LKBDCMSG_STR-KAPPL sy-vline 
WA_J_7LKBDCMSG_STR-KSCHL sy-vline 
WA_J_7LKBDCMSG_STR-VGTYP sy-vline 
WA_J_7LKBDCMSG_STR-TCODE sy-vline 
WA_J_7LKBDCMSG_STR-DYNAME sy-vline 
WA_J_7LKBDCMSG_STR-DYNUMB sy-vline 
WA_J_7LKBDCMSG_STR-MSGTYP sy-vline 
WA_J_7LKBDCMSG_STR-MSGSPRA sy-vline 
WA_J_7LKBDCMSG_STR-MSGID sy-vline 
WA_J_7LKBDCMSG_STR-MSGNR sy-vline 
WA_J_7LKBDCMSG_STR-MSGV1 sy-vline 
WA_J_7LKBDCMSG_STR-MSGV2 sy-vline 
WA_J_7LKBDCMSG_STR-MSGV3 sy-vline 
WA_J_7LKBDCMSG_STR-MSGV4 sy-vline 
WA_J_7LKBDCMSG_STR-ENV sy-vline 
WA_J_7LKBDCMSG_STR-FLDNAME sy-vline 
WA_J_7LKBDCMSG_STR-KINDX sy-vline 
WA_J_7LKBDCMSG_STR-PINDX sy-vline 
WA_J_7LKBDCMSG_STR-ERSDAADM sy-vline 
WA_J_7LKBDCMSG_STR-ERZETADM sy-vline 
WA_J_7LKBDCMSG_STR-ERNAMADM sy-vline      INTO ld_text SEPARATED BY SPACE.

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