ABAP Select data from SAP table /KYK/SIOHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/SIOHEADER
*  INTO TABLE @DATA(IT_/KYK/SIOHEADER2).
*--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_/KYK/SIOHEADER INDEX 1 INTO DATA(WA_/KYK/SIOHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/SIOHEADER>-AUFNR = 1.
</KYK/SIOHEADER>-PLNBEZ = 1.
</KYK/SIOHEADER>-MATXT = 1.
</KYK/SIOHEADER>-GAMNG = 1.
</KYK/SIOHEADER>-GMEIN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/SIOHEADER-GWEMG, sy-vline,
  WA_/KYK/SIOHEADER-GASMG, sy-vline,
  WA_/KYK/SIOHEADER-STTXT, sy-vline,
  WA_/KYK/SIOHEADER-ASTTX, sy-vline,
  WA_/KYK/SIOHEADER-CHARG, sy-vline,
  WA_/KYK/SIOHEADER-GLTRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/SIOHEADER 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_/KYK/SIOHEADER 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_/KYK/SIOHEADER INTO WA_/KYK/SIOHEADER.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/SIOHEADER-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/SIOHEADER-AUFNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/SIOHEADER-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/SIOHEADER-PROJN.
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_/KYK/SIOHEADER_STR, 
AUFNR TYPE STRING,
PLNBEZ TYPE STRING,
MATXT TYPE STRING,
GAMNG TYPE STRING,
GMEIN TYPE STRING,
GWEMG TYPE STRING,
GASMG TYPE STRING,
STTXT TYPE STRING,
ASTTX TYPE STRING,
CHARG TYPE STRING,
GLTRP TYPE STRING,
GSTRP TYPE STRING,
GLUZP TYPE STRING,
GSUZP TYPE STRING,
GLTRS TYPE STRING,
GSTRS TYPE STRING,
GLUZS TYPE STRING,
GSUZS TYPE STRING,
FTRMS TYPE STRING,
GSTRI TYPE STRING,
GLTRI TYPE STRING,
GSUZI TYPE STRING,
FTRMI TYPE STRING,
VERID TYPE STRING,
RSNUM TYPE STRING,
WERKS TYPE STRING,
AUART TYPE STRING,
DISPO TYPE STRING,
FEVOR TYPE STRING,
ERDAT TYPE STRING,
ERFZEIT TYPE STRING,
ERNAM TYPE STRING,
KDAUF_AUFK TYPE STRING,
PROJN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/SIOHEADER_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_/KYK/SIOHEADER_STR-AUFNR sy-vline 
WA_/KYK/SIOHEADER_STR-PLNBEZ sy-vline 
WA_/KYK/SIOHEADER_STR-MATXT sy-vline 
WA_/KYK/SIOHEADER_STR-GAMNG sy-vline 
WA_/KYK/SIOHEADER_STR-GMEIN sy-vline 
WA_/KYK/SIOHEADER_STR-GWEMG sy-vline 
WA_/KYK/SIOHEADER_STR-GASMG sy-vline 
WA_/KYK/SIOHEADER_STR-STTXT sy-vline 
WA_/KYK/SIOHEADER_STR-ASTTX sy-vline 
WA_/KYK/SIOHEADER_STR-CHARG sy-vline 
WA_/KYK/SIOHEADER_STR-GLTRP sy-vline 
WA_/KYK/SIOHEADER_STR-GSTRP sy-vline 
WA_/KYK/SIOHEADER_STR-GLUZP sy-vline 
WA_/KYK/SIOHEADER_STR-GSUZP sy-vline 
WA_/KYK/SIOHEADER_STR-GLTRS sy-vline 
WA_/KYK/SIOHEADER_STR-GSTRS sy-vline 
WA_/KYK/SIOHEADER_STR-GLUZS sy-vline 
WA_/KYK/SIOHEADER_STR-GSUZS sy-vline 
WA_/KYK/SIOHEADER_STR-FTRMS sy-vline 
WA_/KYK/SIOHEADER_STR-GSTRI sy-vline 
WA_/KYK/SIOHEADER_STR-GLTRI sy-vline 
WA_/KYK/SIOHEADER_STR-GSUZI sy-vline 
WA_/KYK/SIOHEADER_STR-FTRMI sy-vline 
WA_/KYK/SIOHEADER_STR-VERID sy-vline 
WA_/KYK/SIOHEADER_STR-RSNUM sy-vline 
WA_/KYK/SIOHEADER_STR-WERKS sy-vline 
WA_/KYK/SIOHEADER_STR-AUART sy-vline 
WA_/KYK/SIOHEADER_STR-DISPO sy-vline 
WA_/KYK/SIOHEADER_STR-FEVOR sy-vline 
WA_/KYK/SIOHEADER_STR-ERDAT sy-vline 
WA_/KYK/SIOHEADER_STR-ERFZEIT sy-vline 
WA_/KYK/SIOHEADER_STR-ERNAM sy-vline 
WA_/KYK/SIOHEADER_STR-KDAUF_AUFK sy-vline 
WA_/KYK/SIOHEADER_STR-PROJN sy-vline      INTO ld_text SEPARATED BY SPACE.

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