ABAP Select data from SAP table J_7LPK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LPK 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_7LPK. 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_7LPK 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_7LPK TYPE STANDARD TABLE OF J_7LPK,
      WA_J_7LPK TYPE J_7LPK,
      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_7LPK> TYPE J_7LPK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LPK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LPK
  INTO TABLE IT_J_7LPK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LPK
*  INTO TABLE @DATA(IT_J_7LPK2).
*--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_7LPK INDEX 1 INTO DATA(WA_J_7LPK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LPK ASSIGNING <J_7LPK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LPK>-TESTLAUF = 1.
<J_7LPK>-BUTXT = 1.
<J_7LPK>-STRAS = 1.
<J_7LPK>-PSTLZ = 1.
<J_7LPK>-ORT01 = 1.

ENDLOOP.

LOOP AT IT_J_7LPK INTO WA_J_7LPK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LPK-BLART, sy-vline,
  WA_J_7LPK-ZNEHM, sy-vline,
  WA_J_7LPK-PERIO, sy-vline,
  WA_J_7LPK-DATAB, sy-vline,
  WA_J_7LPK-DATBI, sy-vline,
  WA_J_7LPK-PERINR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LPK 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_7LPK 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_7LPK INTO WA_J_7LPK.


*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_7LPK-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LPK-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_7LPK_STR, 
TESTLAUF TYPE STRING,
BUTXT TYPE STRING,
STRAS TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
BLART TYPE STRING,
ZNEHM TYPE STRING,
PERIO TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
PERINR TYPE STRING,
GJAHR TYPE STRING,
PLVRSION TYPE STRING,
DATAB_PL TYPE STRING,
DATBI_PL TYPE STRING,
WAERK TYPE STRING,
WAERE TYPE STRING,
NETWE1 TYPE STRING,
NETWE2 TYPE STRING,
NETWR TYPE STRING,
KPROZ TYPE STRING,
MSATZ TYPE STRING,
AUDAT TYPE STRING,
FONAM TYPE STRING,
ZART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LPK_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_7LPK_STR-TESTLAUF sy-vline 
WA_J_7LPK_STR-BUTXT sy-vline 
WA_J_7LPK_STR-STRAS sy-vline 
WA_J_7LPK_STR-PSTLZ sy-vline 
WA_J_7LPK_STR-ORT01 sy-vline 
WA_J_7LPK_STR-BLART sy-vline 
WA_J_7LPK_STR-ZNEHM sy-vline 
WA_J_7LPK_STR-PERIO sy-vline 
WA_J_7LPK_STR-DATAB sy-vline 
WA_J_7LPK_STR-DATBI sy-vline 
WA_J_7LPK_STR-PERINR sy-vline 
WA_J_7LPK_STR-GJAHR sy-vline 
WA_J_7LPK_STR-PLVRSION sy-vline 
WA_J_7LPK_STR-DATAB_PL sy-vline 
WA_J_7LPK_STR-DATBI_PL sy-vline 
WA_J_7LPK_STR-WAERK sy-vline 
WA_J_7LPK_STR-WAERE sy-vline 
WA_J_7LPK_STR-NETWE1 sy-vline 
WA_J_7LPK_STR-NETWE2 sy-vline 
WA_J_7LPK_STR-NETWR sy-vline 
WA_J_7LPK_STR-KPROZ sy-vline 
WA_J_7LPK_STR-MSATZ sy-vline 
WA_J_7LPK_STR-AUDAT sy-vline 
WA_J_7LPK_STR-FONAM sy-vline 
WA_J_7LPK_STR-ZART sy-vline      INTO ld_text SEPARATED BY SPACE.

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