ABAP Select data from SAP table P18_OSVC_CRT_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P18_OSVC_CRT_S 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 P18_OSVC_CRT_S. 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 P18_OSVC_CRT_S 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_P18_OSVC_CRT_S TYPE STANDARD TABLE OF P18_OSVC_CRT_S,
      WA_P18_OSVC_CRT_S TYPE P18_OSVC_CRT_S,
      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: <P18_OSVC_CRT_S> TYPE P18_OSVC_CRT_S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P18_OSVC_CRT_S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P18_OSVC_CRT_S
  INTO TABLE IT_P18_OSVC_CRT_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P18_OSVC_CRT_S
*  INTO TABLE @DATA(IT_P18_OSVC_CRT_S2).
*--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_P18_OSVC_CRT_S INDEX 1 INTO DATA(WA_P18_OSVC_CRT_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P18_OSVC_CRT_S ASSIGNING <P18_OSVC_CRT_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P18_OSVC_CRT_S>-DOCUMENT = 1.
<P18_OSVC_CRT_S>-YEAR_CERT = 1.
<P18_OSVC_CRT_S>-EMPLOYER = 1.
<P18_OSVC_CRT_S>-NAME_1 = 1.
<P18_OSVC_CRT_S>-NAME_2 = 1.

ENDLOOP.

LOOP AT IT_P18_OSVC_CRT_S INTO WA_P18_OSVC_CRT_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P18_OSVC_CRT_S-NAME_ALL, sy-vline,
  WA_P18_OSVC_CRT_S-STREET, sy-vline,
  WA_P18_OSVC_CRT_S-HOUSE_NR, sy-vline,
  WA_P18_OSVC_CRT_S-PAYEE_NR, sy-vline,
  WA_P18_OSVC_CRT_S-POST_CODE, sy-vline,
  WA_P18_OSVC_CRT_S-MUNICIPALITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P18_OSVC_CRT_S 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_P18_OSVC_CRT_S 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_P18_OSVC_CRT_S INTO WA_P18_OSVC_CRT_S.


*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 PDATE, internal->external for field GBDAT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P18_OSVC_CRT_S-GBDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P18_OSVC_CRT_S-GBDAT.
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_P18_OSVC_CRT_S_STR, 
DOCUMENT TYPE STRING,
YEAR_CERT TYPE STRING,
EMPLOYER TYPE STRING,
NAME_1 TYPE STRING,
NAME_2 TYPE STRING,
NAME_ALL TYPE STRING,
STREET TYPE STRING,
HOUSE_NR TYPE STRING,
PAYEE_NR TYPE STRING,
POST_CODE TYPE STRING,
MUNICIPALITY TYPE STRING,
PHONE_NR TYPE STRING,
FORMAT_ADDRESS_S TYPE STRING,
EMPLOYEE TYPE STRING,
PERID TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
TITEL TYPE STRING,
ENAME TYPE STRING,
GBDAT TYPE STRING,
HEALTHIN TYPE STRING,
AUTHORDT TYPE STRING,
NAME_CP TYPE STRING,
PHONE_CP TYPE STRING,
DATFIL TYPE STRING,
PERIODSI TYPE STRING,
MONTHSSI TYPE STRING,
MONTH_01 TYPE STRING,
MONTH_02 TYPE STRING,
MONTH_03 TYPE STRING,
MONTH_04 TYPE STRING,
MONTH_05 TYPE STRING,
MONTH_06 TYPE STRING,
MONTH_07 TYPE STRING,
MONTH_08 TYPE STRING,
MONTH_09 TYPE STRING,
MONTH_10 TYPE STRING,
MONTH_11 TYPE STRING,
MONTH_12 TYPE STRING,
MONTH_ALL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P18_OSVC_CRT_S_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_P18_OSVC_CRT_S_STR-DOCUMENT sy-vline 
WA_P18_OSVC_CRT_S_STR-YEAR_CERT sy-vline 
WA_P18_OSVC_CRT_S_STR-EMPLOYER sy-vline 
WA_P18_OSVC_CRT_S_STR-NAME_1 sy-vline 
WA_P18_OSVC_CRT_S_STR-NAME_2 sy-vline 
WA_P18_OSVC_CRT_S_STR-NAME_ALL sy-vline 
WA_P18_OSVC_CRT_S_STR-STREET sy-vline 
WA_P18_OSVC_CRT_S_STR-HOUSE_NR sy-vline 
WA_P18_OSVC_CRT_S_STR-PAYEE_NR sy-vline 
WA_P18_OSVC_CRT_S_STR-POST_CODE sy-vline 
WA_P18_OSVC_CRT_S_STR-MUNICIPALITY sy-vline 
WA_P18_OSVC_CRT_S_STR-PHONE_NR sy-vline 
WA_P18_OSVC_CRT_S_STR-FORMAT_ADDRESS_S sy-vline 
WA_P18_OSVC_CRT_S_STR-EMPLOYEE sy-vline 
WA_P18_OSVC_CRT_S_STR-PERID sy-vline 
WA_P18_OSVC_CRT_S_STR-NACHN sy-vline 
WA_P18_OSVC_CRT_S_STR-VORNA sy-vline 
WA_P18_OSVC_CRT_S_STR-TITEL sy-vline 
WA_P18_OSVC_CRT_S_STR-ENAME sy-vline 
WA_P18_OSVC_CRT_S_STR-GBDAT sy-vline 
WA_P18_OSVC_CRT_S_STR-HEALTHIN sy-vline 
WA_P18_OSVC_CRT_S_STR-AUTHORDT sy-vline 
WA_P18_OSVC_CRT_S_STR-NAME_CP sy-vline 
WA_P18_OSVC_CRT_S_STR-PHONE_CP sy-vline 
WA_P18_OSVC_CRT_S_STR-DATFIL sy-vline 
WA_P18_OSVC_CRT_S_STR-PERIODSI sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTHSSI sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_01 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_02 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_03 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_04 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_05 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_06 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_07 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_08 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_09 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_10 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_11 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_12 sy-vline 
WA_P18_OSVC_CRT_S_STR-MONTH_ALL sy-vline      INTO ld_text SEPARATED BY SPACE.

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