ABAP Select data from SAP table J_7LV1A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LV1A 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_7LV1A. 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_7LV1A 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_7LV1A TYPE STANDARD TABLE OF J_7LV1A,
      WA_J_7LV1A TYPE J_7LV1A,
      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_7LV1A> TYPE J_7LV1A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LV1A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LV1A
  INTO TABLE IT_J_7LV1A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LV1A
*  INTO TABLE @DATA(IT_J_7LV1A2).
*--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_7LV1A INDEX 1 INTO DATA(WA_J_7LV1A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LV1A ASSIGNING <J_7LV1A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LV1A>-MANDT = 1.
<J_7LV1A>-VBELN = 1.
<J_7LV1A>-BLART = 1.
<J_7LV1A>-BLTYP = 1.
<J_7LV1A>-FMGBA = 1.

ENDLOOP.

LOOP AT IT_J_7LV1A INTO WA_J_7LV1A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LV1A-EXPORTKZ, sy-vline,
  WA_J_7LV1A-IMPORTKZ, sy-vline,
  WA_J_7LV1A-INLANDKZ, sy-vline,
  WA_J_7LV1A-KUMSTKZ, sy-vline,
  WA_J_7LV1A-PGNAM, sy-vline,
  WA_J_7LV1A-RONAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LV1A 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_7LV1A 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_7LV1A INTO WA_J_7LV1A.


*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_7LV1A-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LV1A-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_7LV1A_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
BLART TYPE STRING,
BLTYP TYPE STRING,
FMGBA TYPE STRING,
EXPORTKZ TYPE STRING,
IMPORTKZ TYPE STRING,
INLANDKZ TYPE STRING,
KUMSTKZ TYPE STRING,
PGNAM TYPE STRING,
RONAM TYPE STRING,
DTANAM TYPE STRING,
FONAM TYPE STRING,
SMARTFONAM 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_7LV1A_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_7LV1A_STR-MANDT sy-vline 
WA_J_7LV1A_STR-VBELN sy-vline 
WA_J_7LV1A_STR-BLART sy-vline 
WA_J_7LV1A_STR-BLTYP sy-vline 
WA_J_7LV1A_STR-FMGBA sy-vline 
WA_J_7LV1A_STR-EXPORTKZ sy-vline 
WA_J_7LV1A_STR-IMPORTKZ sy-vline 
WA_J_7LV1A_STR-INLANDKZ sy-vline 
WA_J_7LV1A_STR-KUMSTKZ sy-vline 
WA_J_7LV1A_STR-PGNAM sy-vline 
WA_J_7LV1A_STR-RONAM sy-vline 
WA_J_7LV1A_STR-DTANAM sy-vline 
WA_J_7LV1A_STR-FONAM sy-vline 
WA_J_7LV1A_STR-SMARTFONAM sy-vline 
WA_J_7LV1A_STR-DATABADM sy-vline 
WA_J_7LV1A_STR-DATBIADM sy-vline 
WA_J_7LV1A_STR-ERSDAADM sy-vline 
WA_J_7LV1A_STR-ERZETADM sy-vline 
WA_J_7LV1A_STR-ERNAMADM sy-vline 
WA_J_7LV1A_STR-LAEDAADM sy-vline 
WA_J_7LV1A_STR-AEZETADM sy-vline 
WA_J_7LV1A_STR-AENAMADM sy-vline 
WA_J_7LV1A_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.