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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/SECR
*  INTO TABLE @DATA(IT_/KYK/SECR2).
*--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/SECR INDEX 1 INTO DATA(WA_/KYK/SECR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/SECR>-HIERARCHY = 1.
</KYK/SECR>-CHANGE = 1.
</KYK/SECR>-ITEM = 1.
</KYK/SECR>-POSTP = 1.
</KYK/SECR>-DESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/SECR-MENGE, sy-vline,
  WA_/KYK/SECR-MEINS, sy-vline,
  WA_/KYK/SECR-DATUV, sy-vline,
  WA_/KYK/SECR-UDATE, sy-vline,
  WA_/KYK/SECR-UTIME, sy-vline,
  WA_/KYK/SECR-USERNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/SECR 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/SECR 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/SECR INTO WA_/KYK/SECR.


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

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/SECR-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/SECR-AENNR.
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/SECR_STR, 
HIERARCHY TYPE STRING,
CHANGE TYPE STRING,
ITEM TYPE STRING,
POSTP TYPE STRING,
DESCRIPTION TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
DATUV TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
USERNAME TYPE STRING,
F_OLD TYPE STRING,
F_NEW TYPE STRING,
AENNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/SECR_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/SECR_STR-HIERARCHY sy-vline 
WA_/KYK/SECR_STR-CHANGE sy-vline 
WA_/KYK/SECR_STR-ITEM sy-vline 
WA_/KYK/SECR_STR-POSTP sy-vline 
WA_/KYK/SECR_STR-DESCRIPTION sy-vline 
WA_/KYK/SECR_STR-MENGE sy-vline 
WA_/KYK/SECR_STR-MEINS sy-vline 
WA_/KYK/SECR_STR-DATUV sy-vline 
WA_/KYK/SECR_STR-UDATE sy-vline 
WA_/KYK/SECR_STR-UTIME sy-vline 
WA_/KYK/SECR_STR-USERNAME sy-vline 
WA_/KYK/SECR_STR-F_OLD sy-vline 
WA_/KYK/SECR_STR-F_NEW sy-vline 
WA_/KYK/SECR_STR-AENNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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