ABAP Select data from SAP table CYSTANDA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CYSTANDA
*  INTO TABLE @DATA(IT_CYSTANDA2).
*--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_CYSTANDA INDEX 1 INTO DATA(WA_CYSTANDA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CYSTANDA>-ARBPL = 1.
<CYSTANDA>-KAPAR = 1.
<CYSTANDA>-WERKS = 1.
<CYSTANDA>-PERNR = 1.
<CYSTANDA>-EINZNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CYSTANDA-PERIOD, sy-vline,
  WA_CYSTANDA-BEDAKT, sy-vline,
  WA_CYSTANDA-SBEDAKT, sy-vline,
  WA_CYSTANDA-IBEDAKT, sy-vline,
  WA_CYSTANDA-ANGEAKT, sy-vline,
  WA_CYSTANDA-SLIBELAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CYSTANDA 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_CYSTANDA 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_CYSTANDA INTO WA_CYSTANDA.


*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 EINHEIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CYSTANDA-EINHEIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CYSTANDA-EINHEIT.
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_CYSTANDA_STR, 
ARBPL TYPE STRING,
KAPAR TYPE STRING,
WERKS TYPE STRING,
PERNR TYPE STRING,
EINZNAME TYPE STRING,
PERIOD TYPE STRING,
BEDAKT TYPE STRING,
SBEDAKT TYPE STRING,
IBEDAKT TYPE STRING,
ANGEAKT TYPE STRING,
SLIBELAS TYPE STRING,
SSLIBELAS TYPE STRING,
ISLIBELAS TYPE STRING,
SLIDELTA TYPE STRING,
SSLIDELTA TYPE STRING,
ISLIDELTA TYPE STRING,
EINHEIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CYSTANDA_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_CYSTANDA_STR-ARBPL sy-vline 
WA_CYSTANDA_STR-KAPAR sy-vline 
WA_CYSTANDA_STR-WERKS sy-vline 
WA_CYSTANDA_STR-PERNR sy-vline 
WA_CYSTANDA_STR-EINZNAME sy-vline 
WA_CYSTANDA_STR-PERIOD sy-vline 
WA_CYSTANDA_STR-BEDAKT sy-vline 
WA_CYSTANDA_STR-SBEDAKT sy-vline 
WA_CYSTANDA_STR-IBEDAKT sy-vline 
WA_CYSTANDA_STR-ANGEAKT sy-vline 
WA_CYSTANDA_STR-SLIBELAS sy-vline 
WA_CYSTANDA_STR-SSLIBELAS sy-vline 
WA_CYSTANDA_STR-ISLIBELAS sy-vline 
WA_CYSTANDA_STR-SLIDELTA sy-vline 
WA_CYSTANDA_STR-SSLIDELTA sy-vline 
WA_CYSTANDA_STR-ISLIDELTA sy-vline 
WA_CYSTANDA_STR-EINHEIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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