ABAP Select data from SAP table /SYCLO/WM_LINV_STR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SYCLO/WM_LINV_STR 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 /SYCLO/WM_LINV_STR. 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 /SYCLO/WM_LINV_STR 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_/SYCLO/WM_LINV_STR TYPE STANDARD TABLE OF /SYCLO/WM_LINV_STR,
      WA_/SYCLO/WM_LINV_STR TYPE /SYCLO/WM_LINV_STR,
      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: </SYCLO/WM_LINV_STR> TYPE /SYCLO/WM_LINV_STR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SYCLO/WM_LINV_STR
  INTO TABLE IT_/SYCLO/WM_LINV_STR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SYCLO/WM_LINV_STR
*  INTO TABLE @DATA(IT_/SYCLO/WM_LINV_STR2).
*--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_/SYCLO/WM_LINV_STR INDEX 1 INTO DATA(WA_/SYCLO/WM_LINV_STR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SYCLO/WM_LINV_STR ASSIGNING </SYCLO/WM_LINV_STR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SYCLO/WM_LINV_STR>-MANDT = 1.
</SYCLO/WM_LINV_STR>-LGNUM = 1.
</SYCLO/WM_LINV_STR>-IVNUM = 1.
</SYCLO/WM_LINV_STR>-IVPOS = 1.
</SYCLO/WM_LINV_STR>-LQNUM = 1.

ENDLOOP.

LOOP AT IT_/SYCLO/WM_LINV_STR INTO WA_/SYCLO/WM_LINV_STR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SYCLO/WM_LINV_STR-NANUM, sy-vline,
  WA_/SYCLO/WM_LINV_STR-ISTAT, sy-vline,
  WA_/SYCLO/WM_LINV_STR-NVERS, sy-vline,
  WA_/SYCLO/WM_LINV_STR-ISEIT, sy-vline,
  WA_/SYCLO/WM_LINV_STR-LGTYP, sy-vline,
  WA_/SYCLO/WM_LINV_STR-LGPLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SYCLO/WM_LINV_STR 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_/SYCLO/WM_LINV_STR 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_/SYCLO/WM_LINV_STR INTO WA_/SYCLO/WM_LINV_STR.


*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_/SYCLO/WM_LINV_STR-IVNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LINV_STR-IVNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SYCLO/WM_LINV_STR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LINV_STR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SYCLO/WM_LINV_STR-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LINV_STR-SONUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_/SYCLO/WM_LINV_STR-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LINV_STR-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_/SYCLO/WM_LINV_STR_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
IVNUM TYPE STRING,
IVPOS TYPE STRING,
LQNUM TYPE STRING,
NANUM TYPE STRING,
ISTAT TYPE STRING,
NVERS TYPE STRING,
ISEIT TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
PLPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
LETYP TYPE STRING,
ANZLE TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
MENGA TYPE STRING,
ALTME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
WDATU TYPE STRING,
GESME TYPE STRING,
IDATU TYPE STRING,
KZINV TYPE STRING,
IRNUM TYPE STRING,
TANUM TYPE STRING,
TAPOS TYPE STRING,
LENUM TYPE STRING,
VFDAT TYPE STRING,
LGORT TYPE STRING,
UNAME TYPE STRING,
QUINV TYPE STRING,
SGT_SCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SYCLO/WM_LINV_STR_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_/SYCLO/WM_LINV_STR_STR-MANDT sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LGNUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-IVNUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-IVPOS sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LQNUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-NANUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-ISTAT sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-NVERS sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-ISEIT sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LGTYP sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LGPLA sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-PLPOS sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-MATNR sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-WERKS sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-CHARG sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LETYP sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-ANZLE sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-MENGE sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-MEINS sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-MENGA sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-ALTME sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-UMREZ sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-UMREN sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-BESTQ sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-SOBKZ sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-SONUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-WDATU sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-GESME sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-IDATU sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-KZINV sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-IRNUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-TANUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-TAPOS sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LENUM sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-VFDAT sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-LGORT sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-UNAME sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-QUINV sy-vline 
WA_/SYCLO/WM_LINV_STR_STR-SGT_SCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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