ABAP Select data from SAP table /SYCLO/WM_LTAK_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_LTAK_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_LTAK_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_LTAK_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_LTAK_STR TYPE STANDARD TABLE OF /SYCLO/WM_LTAK_STR,
      WA_/SYCLO/WM_LTAK_STR TYPE /SYCLO/WM_LTAK_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_LTAK_STR> TYPE /SYCLO/WM_LTAK_STR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SYCLO/WM_LTAK_STR
*  INTO TABLE @DATA(IT_/SYCLO/WM_LTAK_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_LTAK_STR INDEX 1 INTO DATA(WA_/SYCLO/WM_LTAK_STR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SYCLO/WM_LTAK_STR>-MANDT = 1.
</SYCLO/WM_LTAK_STR>-LGNUM = 1.
</SYCLO/WM_LTAK_STR>-TANUM = 1.
</SYCLO/WM_LTAK_STR>-BWART = 1.
</SYCLO/WM_LTAK_STR>-BWLVS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SYCLO/WM_LTAK_STR-TBPRI, sy-vline,
  WA_/SYCLO/WM_LTAK_STR-TRART, sy-vline,
  WA_/SYCLO/WM_LTAK_STR-BDATU, sy-vline,
  WA_/SYCLO/WM_LTAK_STR-BZEIT, sy-vline,
  WA_/SYCLO/WM_LTAK_STR-BNAME, sy-vline,
  WA_/SYCLO/WM_LTAK_STR-REFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SYCLO/WM_LTAK_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_LTAK_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_LTAK_STR INTO WA_/SYCLO/WM_LTAK_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 REFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SYCLO/WM_LTAK_STR-REFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LTAK_STR-REFNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/SYCLO/WM_LTAK_STR-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LTAK_STR-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field ZEIEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SYCLO/WM_LTAK_STR-ZEIEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SYCLO/WM_LTAK_STR-ZEIEI.
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_LTAK_STR_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
TANUM TYPE STRING,
BWART TYPE STRING,
BWLVS TYPE STRING,
TBPRI TYPE STRING,
TRART TYPE STRING,
BDATU TYPE STRING,
BZEIT TYPE STRING,
BNAME TYPE STRING,
REFNR TYPE STRING,
TBNUM TYPE STRING,
UBNUM TYPE STRING,
VBELN TYPE STRING,
KQUIT TYPE STRING,
QDATU TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
BETYP TYPE STRING,
BENUM TYPE STRING,
DRUKZ TYPE STRING,
DRUCK TYPE STRING,
TEILK TYPE STRING,
KR2SO TYPE STRING,
KR2KU TYPE STRING,
KDISO TYPE STRING,
KZPLA TYPE STRING,
PLDAT TYPE STRING,
RSNUM TYPE STRING,
LZNUM TYPE STRING,
BDART TYPE STRING,
PKNUM TYPE STRING,
PKPOS TYPE STRING,
KZLEI TYPE STRING,
KISTZ TYPE STRING,
KISTP TYPE STRING,
PERNR TYPE STRING,
SOLWM TYPE STRING,
SOLEX TYPE STRING,
ISTWM TYPE STRING,
ZEIEI TYPE STRING,
HRSTS TYPE STRING,
STDAT TYPE STRING,
ENDAT TYPE STRING,
STUZT TYPE STRING,
ENUZT TYPE STRING,
L2SKA TYPE STRING,
MINWM TYPE STRING,
LGTOR TYPE STRING,
LGBZO TYPE STRING,
KZVEP TYPE STRING,
SWABW TYPE STRING,
AUSFB TYPE STRING,
SPEZI TYPE STRING,
VBTYP TYPE STRING,
QUEUE TYPE STRING,
KGVNQ TYPE STRING,
TAPRI TYPE STRING,
KVQUI TYPE STRING,
HUCON TYPE STRING,
NOITM TYPE STRING,
KZTRM TYPE STRING,
LATER TYPE STRING,
PASSD TYPE STRING,
MULTL TYPE STRING,
LFDAT TYPE STRING,
LFUHR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SYCLO/WM_LTAK_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_LTAK_STR_STR-MANDT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LGNUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-TANUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BWART sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BWLVS sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-TBPRI sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-TRART sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BDATU sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BZEIT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BNAME sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-REFNR sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-TBNUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-UBNUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-VBELN sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KQUIT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-QDATU sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-MBLNR sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-MJAHR sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BETYP sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BENUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-DRUKZ sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-DRUCK sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-TEILK sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KR2SO sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KR2KU sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KDISO sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KZPLA sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-PLDAT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-RSNUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LZNUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-BDART sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-PKNUM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-PKPOS sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KZLEI sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KISTZ sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KISTP sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-PERNR sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-SOLWM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-SOLEX sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-ISTWM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-ZEIEI sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-HRSTS sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-STDAT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-ENDAT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-STUZT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-ENUZT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-L2SKA sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-MINWM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LGTOR sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LGBZO sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KZVEP sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-SWABW sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-AUSFB sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-SPEZI sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-VBTYP sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-QUEUE sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KGVNQ sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-TAPRI sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KVQUI sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-HUCON sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-NOITM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-KZTRM sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LATER sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-PASSD sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-MULTL sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LFDAT sy-vline 
WA_/SYCLO/WM_LTAK_STR_STR-LFUHR sy-vline      INTO ld_text SEPARATED BY SPACE.

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