ABAP Select data from SAP table J_7LV1F into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LV1F 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_7LV1F. 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_7LV1F 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_7LV1F TYPE STANDARD TABLE OF J_7LV1F,
      WA_J_7LV1F TYPE J_7LV1F,
      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_7LV1F> TYPE J_7LV1F.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LV1F.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LV1F
  INTO TABLE IT_J_7LV1F.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LV1F
*  INTO TABLE @DATA(IT_J_7LV1F2).
*--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_7LV1F INDEX 1 INTO DATA(WA_J_7LV1F2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LV1F ASSIGNING <J_7LV1F>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LV1F>-MANDT = 1.
<J_7LV1F>-VBELN = 1.
<J_7LV1F>-POSNR = 1.
<J_7LV1F>-FKEY = 1.
<J_7LV1F>-MFELD = 1.

ENDLOOP.

LOOP AT IT_J_7LV1F INTO WA_J_7LV1F.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LV1F-GRUPPE, sy-vline,
  WA_J_7LV1F-GRUPPATTRIB1, sy-vline,
  WA_J_7LV1F-GRUPPATTRIB2, sy-vline,
  WA_J_7LV1F-GRUPPATTRIB3, sy-vline,
  WA_J_7LV1F-GRUPPATTRIB4, sy-vline,
  WA_J_7LV1F-KOART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LV1F 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_7LV1F 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_7LV1F INTO WA_J_7LV1F.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_7LV1F-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LV1F-VBELN.
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_7LV1F_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
FKEY TYPE STRING,
MFELD TYPE STRING,
GRUPPE TYPE STRING,
GRUPPATTRIB1 TYPE STRING,
GRUPPATTRIB2 TYPE STRING,
GRUPPATTRIB3 TYPE STRING,
GRUPPATTRIB4 TYPE STRING,
KOART TYPE STRING,
KPROZ TYPE STRING,
DATABADM TYPE STRING,
DATBIADM TYPE STRING,
ERSDAADM TYPE STRING,
ERZETADM TYPE STRING,
ERNAMADM TYPE STRING,
LAEDAADM TYPE STRING,
AEZETADM TYPE STRING,
AENAMADM TYPE STRING,
LVORMADM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LV1F_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_7LV1F_STR-MANDT sy-vline 
WA_J_7LV1F_STR-VBELN sy-vline 
WA_J_7LV1F_STR-POSNR sy-vline 
WA_J_7LV1F_STR-FKEY sy-vline 
WA_J_7LV1F_STR-MFELD sy-vline 
WA_J_7LV1F_STR-GRUPPE sy-vline 
WA_J_7LV1F_STR-GRUPPATTRIB1 sy-vline 
WA_J_7LV1F_STR-GRUPPATTRIB2 sy-vline 
WA_J_7LV1F_STR-GRUPPATTRIB3 sy-vline 
WA_J_7LV1F_STR-GRUPPATTRIB4 sy-vline 
WA_J_7LV1F_STR-KOART sy-vline 
WA_J_7LV1F_STR-KPROZ sy-vline 
WA_J_7LV1F_STR-DATABADM sy-vline 
WA_J_7LV1F_STR-DATBIADM sy-vline 
WA_J_7LV1F_STR-ERSDAADM sy-vline 
WA_J_7LV1F_STR-ERZETADM sy-vline 
WA_J_7LV1F_STR-ERNAMADM sy-vline 
WA_J_7LV1F_STR-LAEDAADM sy-vline 
WA_J_7LV1F_STR-AEZETADM sy-vline 
WA_J_7LV1F_STR-AENAMADM sy-vline 
WA_J_7LV1F_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.