ABAP Select data from SAP table J_7LKZ3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LKZ3 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_7LKZ3. 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_7LKZ3 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_7LKZ3 TYPE STANDARD TABLE OF J_7LKZ3,
      WA_J_7LKZ3 TYPE J_7LKZ3,
      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_7LKZ3> TYPE J_7LKZ3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LKZ3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LKZ3
  INTO TABLE IT_J_7LKZ3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LKZ3
*  INTO TABLE @DATA(IT_J_7LKZ32).
*--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_7LKZ3 INDEX 1 INTO DATA(WA_J_7LKZ32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LKZ3 ASSIGNING <J_7LKZ3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LKZ3>-MANDT = 1.
<J_7LKZ3>-VRPNR = 1.
<J_7LKZ3>-MAKTX = 1.
<J_7LKZ3>-VPTYP = 1.
<J_7LKZ3>-VPART = 1.

ENDLOOP.

LOOP AT IT_J_7LKZ3 INTO WA_J_7LKZ3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LKZ3-TRENNKZ, sy-vline,
  WA_J_7LKZ3-VPFORMTYP, sy-vline,
  WA_J_7LKZ3-VFLKL, sy-vline,
  WA_J_7LKZ3-VERSCHNITT, sy-vline,
  WA_J_7LKZ3-VPEBENE, sy-vline,
  WA_J_7LKZ3-VPSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LKZ3 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_7LKZ3 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_7LKZ3 INTO WA_J_7LKZ3.


*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 VRPNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKZ3-VRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKZ3-VRPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKZ3-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKZ3-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN3, internal->external for field GSTFN
CALL FUNCTION 'CONVERSION_EXIT_MATN3_OUTPUT'
  EXPORTING
    input =                      WA_J_7LKZ3-GSTFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LKZ3-GSTFN.
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_7LKZ3_STR, 
MANDT TYPE STRING,
VRPNR TYPE STRING,
MAKTX TYPE STRING,
VPTYP TYPE STRING,
VPART TYPE STRING,
TRENNKZ TYPE STRING,
VPFORMTYP TYPE STRING,
VFLKL TYPE STRING,
VERSCHNITT TYPE STRING,
VPEBENE TYPE STRING,
VPSTAT TYPE STRING,
VAKTIVKZ TYPE STRING,
LVORM1 TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
VRSIO TYPE STRING,
LVORM3 TYPE STRING,
STOFI TYPE STRING,
STGEW TYPE STRING,
GEWEI TYPE STRING,
STOKL TYPE STRING,
GSTFN TYPE STRING,
STOKTX TYPE STRING,
LVORM2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LKZ3_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_7LKZ3_STR-MANDT sy-vline 
WA_J_7LKZ3_STR-VRPNR sy-vline 
WA_J_7LKZ3_STR-MAKTX sy-vline 
WA_J_7LKZ3_STR-VPTYP sy-vline 
WA_J_7LKZ3_STR-VPART sy-vline 
WA_J_7LKZ3_STR-TRENNKZ sy-vline 
WA_J_7LKZ3_STR-VPFORMTYP sy-vline 
WA_J_7LKZ3_STR-VFLKL sy-vline 
WA_J_7LKZ3_STR-VERSCHNITT sy-vline 
WA_J_7LKZ3_STR-VPEBENE sy-vline 
WA_J_7LKZ3_STR-VPSTAT sy-vline 
WA_J_7LKZ3_STR-VAKTIVKZ sy-vline 
WA_J_7LKZ3_STR-LVORM1 sy-vline 
WA_J_7LKZ3_STR-DATBI sy-vline 
WA_J_7LKZ3_STR-DATAB sy-vline 
WA_J_7LKZ3_STR-VRSIO sy-vline 
WA_J_7LKZ3_STR-LVORM3 sy-vline 
WA_J_7LKZ3_STR-STOFI sy-vline 
WA_J_7LKZ3_STR-STGEW sy-vline 
WA_J_7LKZ3_STR-GEWEI sy-vline 
WA_J_7LKZ3_STR-STOKL sy-vline 
WA_J_7LKZ3_STR-GSTFN sy-vline 
WA_J_7LKZ3_STR-STOKTX sy-vline 
WA_J_7LKZ3_STR-LVORM2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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