ABAP Select data from SAP table J_7LKE2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKE2 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_7LKE2. 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_7LKE2 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_7LKE2 TYPE STANDARD TABLE OF J_7LKE2,
      WA_J_7LKE2 TYPE J_7LKE2,
      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_7LKE2> TYPE J_7LKE2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKE2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKE2
  INTO TABLE IT_J_7LKE2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKE2
*  INTO TABLE @DATA(IT_J_7LKE22).
*--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_7LKE2 INDEX 1 INTO DATA(WA_J_7LKE22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKE2 ASSIGNING <J_7LKE2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKE2>-MANDT = 1.
<J_7LKE2>-ZNEHM = 1.
<J_7LKE2>-KONZS = 1.
<J_7LKE2>-KOOPN = 1.
<J_7LKE2>-GMONATE = 1.

ENDLOOP.

LOOP AT IT_J_7LKE2 INTO WA_J_7LKE2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKE2-PERIO, sy-vline,
  WA_J_7LKE2-DATZE, sy-vline,
  WA_J_7LKE2-HDLST, sy-vline,
  WA_J_7LKE2-BBBNR, sy-vline,
  WA_J_7LKE2-BBSNR, sy-vline,
  WA_J_7LKE2-BBNR2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKE2 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_7LKE2 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_7LKE2 INTO WA_J_7LKE2.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKE2-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKE2-GJAHR.
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_7LKE2_STR, 
MANDT TYPE STRING,
ZNEHM TYPE STRING,
KONZS TYPE STRING,
KOOPN TYPE STRING,
GMONATE TYPE STRING,
PERIO TYPE STRING,
DATZE TYPE STRING,
HDLST TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BBNR2 TYPE STRING,
BBSNR2 TYPE STRING,
BBNR3 TYPE STRING,
BBSNR3 TYPE STRING,
BBNR4 TYPE STRING,
BBSNR4 TYPE STRING,
MELDART TYPE STRING,
DATUM TYPE STRING,
MELDDATUM TYPE STRING,
GJAHR TYPE STRING,
PERINR TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKE2_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_7LKE2_STR-MANDT sy-vline 
WA_J_7LKE2_STR-ZNEHM sy-vline 
WA_J_7LKE2_STR-KONZS sy-vline 
WA_J_7LKE2_STR-KOOPN sy-vline 
WA_J_7LKE2_STR-GMONATE sy-vline 
WA_J_7LKE2_STR-PERIO sy-vline 
WA_J_7LKE2_STR-DATZE sy-vline 
WA_J_7LKE2_STR-HDLST sy-vline 
WA_J_7LKE2_STR-BBBNR sy-vline 
WA_J_7LKE2_STR-BBSNR sy-vline 
WA_J_7LKE2_STR-BBNR2 sy-vline 
WA_J_7LKE2_STR-BBSNR2 sy-vline 
WA_J_7LKE2_STR-BBNR3 sy-vline 
WA_J_7LKE2_STR-BBSNR3 sy-vline 
WA_J_7LKE2_STR-BBNR4 sy-vline 
WA_J_7LKE2_STR-BBSNR4 sy-vline 
WA_J_7LKE2_STR-MELDART sy-vline 
WA_J_7LKE2_STR-DATUM sy-vline 
WA_J_7LKE2_STR-MELDDATUM sy-vline 
WA_J_7LKE2_STR-GJAHR sy-vline 
WA_J_7LKE2_STR-PERINR sy-vline 
WA_J_7LKE2_STR-DATAB sy-vline 
WA_J_7LKE2_STR-DATBI sy-vline      INTO ld_text SEPARATED BY SPACE.

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