ABAP Select data from SAP table DETAIL_LINV_STRUC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DETAIL_LINV_STRUC 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 DETAIL_LINV_STRUC. 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 DETAIL_LINV_STRUC 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_DETAIL_LINV_STRUC TYPE STANDARD TABLE OF DETAIL_LINV_STRUC,
      WA_DETAIL_LINV_STRUC TYPE DETAIL_LINV_STRUC,
      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: <DETAIL_LINV_STRUC> TYPE DETAIL_LINV_STRUC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DETAIL_LINV_STRUC
*  INTO TABLE @DATA(IT_DETAIL_LINV_STRUC2).
*--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_DETAIL_LINV_STRUC INDEX 1 INTO DATA(WA_DETAIL_LINV_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DETAIL_LINV_STRUC>-LGNUM = 1.
<DETAIL_LINV_STRUC>-IVNUM = 1.
<DETAIL_LINV_STRUC>-IVPOS = 1.
<DETAIL_LINV_STRUC>-LGTYP = 1.
<DETAIL_LINV_STRUC>-LGPLA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DETAIL_LINV_STRUC-PLPOS, sy-vline,
  WA_DETAIL_LINV_STRUC-MATNR, sy-vline,
  WA_DETAIL_LINV_STRUC-WERKS, sy-vline,
  WA_DETAIL_LINV_STRUC-CHARG, sy-vline,
  WA_DETAIL_LINV_STRUC-SOBKZ, sy-vline,
  WA_DETAIL_LINV_STRUC-LSONR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DETAIL_LINV_STRUC 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_DETAIL_LINV_STRUC 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_DETAIL_LINV_STRUC INTO WA_DETAIL_LINV_STRUC.


*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 IVNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DETAIL_LINV_STRUC-IVNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DETAIL_LINV_STRUC-IVNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_DETAIL_LINV_STRUC-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DETAIL_LINV_STRUC-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_DETAIL_LINV_STRUC-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DETAIL_LINV_STRUC-LENUM.
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_DETAIL_LINV_STRUC_STR, 
LGNUM TYPE STRING,
IVNUM TYPE STRING,
IVPOS TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
PLPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LSONR TYPE STRING,
BESTQ TYPE STRING,
WDATU TYPE STRING,
LENUM TYPE STRING,
MENGA TYPE STRING,
ALTME TYPE STRING,
LQNUM TYPE STRING,
NANUM TYPE STRING,
NVERS TYPE STRING,
ISTAT TYPE STRING,
IDATU TYPE STRING,
KZINV TYPE STRING,
IRNUM TYPE STRING,
MAKTX TYPE STRING,
ISEIT TYPE STRING,
LETYP TYPE STRING,
KZNUL TYPE STRING,
VFDAT TYPE STRING,
LGORT TYPE STRING,
UNAME TYPE STRING,
MATNR_EXTERNAL TYPE STRING,
MATNR_VERSION TYPE STRING,
MATNR_GUID TYPE STRING,
MATNR_LONG TYPE STRING,
PROCESSED TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DETAIL_LINV_STRUC_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_DETAIL_LINV_STRUC_STR-LGNUM sy-vline 
WA_DETAIL_LINV_STRUC_STR-IVNUM sy-vline 
WA_DETAIL_LINV_STRUC_STR-IVPOS sy-vline 
WA_DETAIL_LINV_STRUC_STR-LGTYP sy-vline 
WA_DETAIL_LINV_STRUC_STR-LGPLA sy-vline 
WA_DETAIL_LINV_STRUC_STR-PLPOS sy-vline 
WA_DETAIL_LINV_STRUC_STR-MATNR sy-vline 
WA_DETAIL_LINV_STRUC_STR-WERKS sy-vline 
WA_DETAIL_LINV_STRUC_STR-CHARG sy-vline 
WA_DETAIL_LINV_STRUC_STR-SOBKZ sy-vline 
WA_DETAIL_LINV_STRUC_STR-LSONR sy-vline 
WA_DETAIL_LINV_STRUC_STR-BESTQ sy-vline 
WA_DETAIL_LINV_STRUC_STR-WDATU sy-vline 
WA_DETAIL_LINV_STRUC_STR-LENUM sy-vline 
WA_DETAIL_LINV_STRUC_STR-MENGA sy-vline 
WA_DETAIL_LINV_STRUC_STR-ALTME sy-vline 
WA_DETAIL_LINV_STRUC_STR-LQNUM sy-vline 
WA_DETAIL_LINV_STRUC_STR-NANUM sy-vline 
WA_DETAIL_LINV_STRUC_STR-NVERS sy-vline 
WA_DETAIL_LINV_STRUC_STR-ISTAT sy-vline 
WA_DETAIL_LINV_STRUC_STR-IDATU sy-vline 
WA_DETAIL_LINV_STRUC_STR-KZINV sy-vline 
WA_DETAIL_LINV_STRUC_STR-IRNUM sy-vline 
WA_DETAIL_LINV_STRUC_STR-MAKTX sy-vline 
WA_DETAIL_LINV_STRUC_STR-ISEIT sy-vline 
WA_DETAIL_LINV_STRUC_STR-LETYP sy-vline 
WA_DETAIL_LINV_STRUC_STR-KZNUL sy-vline 
WA_DETAIL_LINV_STRUC_STR-VFDAT sy-vline 
WA_DETAIL_LINV_STRUC_STR-LGORT sy-vline 
WA_DETAIL_LINV_STRUC_STR-UNAME sy-vline 
WA_DETAIL_LINV_STRUC_STR-MATNR_EXTERNAL sy-vline 
WA_DETAIL_LINV_STRUC_STR-MATNR_VERSION sy-vline 
WA_DETAIL_LINV_STRUC_STR-MATNR_GUID sy-vline 
WA_DETAIL_LINV_STRUC_STR-MATNR_LONG sy-vline 
WA_DETAIL_LINV_STRUC_STR-PROCESSED sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGID sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGNO sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGTY sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGV1 sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGV2 sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGV3 sy-vline 
WA_DETAIL_LINV_STRUC_STR-MSGV4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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