ABAP Select data from SAP table J_7LKD02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKD02 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_7LKD02. 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_7LKD02 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_7LKD02 TYPE STANDARD TABLE OF J_7LKD02,
      WA_J_7LKD02 TYPE J_7LKD02,
      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_7LKD02> TYPE J_7LKD02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKD02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKD02
  INTO TABLE IT_J_7LKD02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKD02
*  INTO TABLE @DATA(IT_J_7LKD022).
*--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_7LKD02 INDEX 1 INTO DATA(WA_J_7LKD022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKD02 ASSIGNING <J_7LKD02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKD02>-MANDT = 1.
<J_7LKD02>-VIM_MARKED = 1.
<J_7LKD02>-KEY1 = 1.
<J_7LKD02>-KEY2 = 1.
<J_7LKD02>-KEY3 = 1.

ENDLOOP.

LOOP AT IT_J_7LKD02 INTO WA_J_7LKD02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKD02-BEZEI, sy-vline,
  WA_J_7LKD02-VORZE, sy-vline,
  WA_J_7LKD02-EINKKZ, sy-vline,
  WA_J_7LKD02-VERKKZ, sy-vline,
  WA_J_7LKD02-VGTYP, sy-vline,
  WA_J_7LKD02-POSARV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKD02 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_7LKD02 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_7LKD02 INTO WA_J_7LKD02.


*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 PARVW, internal->external for field PARVW0
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKD02-PARVW0
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKD02-PARVW0.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW1
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKD02-PARVW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKD02-PARVW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW2
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKD02-PARVW2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKD02-PARVW2.
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_7LKD02_STR, 
MANDT TYPE STRING,
VIM_MARKED TYPE STRING,
KEY1 TYPE STRING,
KEY2 TYPE STRING,
KEY3 TYPE STRING,
BEZEI TYPE STRING,
VORZE TYPE STRING,
EINKKZ TYPE STRING,
VERKKZ TYPE STRING,
VGTYP TYPE STRING,
POSARV TYPE STRING,
GRUPPE TYPE STRING,
KEYFIELD0 TYPE STRING,
TAB0 TYPE STRING,
FIELD0 TYPE STRING,
PARVW0 TYPE STRING,
KEYFIELD1 TYPE STRING,
TAB1 TYPE STRING,
FIELD1 TYPE STRING,
PARVW1 TYPE STRING,
KEYFIELD2 TYPE STRING,
TAB2 TYPE STRING,
FIELD2 TYPE STRING,
PARVW2 TYPE STRING,
LVORMADM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKD02_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_7LKD02_STR-MANDT sy-vline 
WA_J_7LKD02_STR-VIM_MARKED sy-vline 
WA_J_7LKD02_STR-KEY1 sy-vline 
WA_J_7LKD02_STR-KEY2 sy-vline 
WA_J_7LKD02_STR-KEY3 sy-vline 
WA_J_7LKD02_STR-BEZEI sy-vline 
WA_J_7LKD02_STR-VORZE sy-vline 
WA_J_7LKD02_STR-EINKKZ sy-vline 
WA_J_7LKD02_STR-VERKKZ sy-vline 
WA_J_7LKD02_STR-VGTYP sy-vline 
WA_J_7LKD02_STR-POSARV sy-vline 
WA_J_7LKD02_STR-GRUPPE sy-vline 
WA_J_7LKD02_STR-KEYFIELD0 sy-vline 
WA_J_7LKD02_STR-TAB0 sy-vline 
WA_J_7LKD02_STR-FIELD0 sy-vline 
WA_J_7LKD02_STR-PARVW0 sy-vline 
WA_J_7LKD02_STR-KEYFIELD1 sy-vline 
WA_J_7LKD02_STR-TAB1 sy-vline 
WA_J_7LKD02_STR-FIELD1 sy-vline 
WA_J_7LKD02_STR-PARVW1 sy-vline 
WA_J_7LKD02_STR-KEYFIELD2 sy-vline 
WA_J_7LKD02_STR-TAB2 sy-vline 
WA_J_7LKD02_STR-FIELD2 sy-vline 
WA_J_7LKD02_STR-PARVW2 sy-vline 
WA_J_7LKD02_STR-LVORMADM sy-vline      INTO ld_text SEPARATED BY SPACE.

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