ABAP Select data from SAP table WSTI_PDC_EVENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSTI_PDC_EVENT
*  INTO TABLE @DATA(IT_WSTI_PDC_EVENT2).
*--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_WSTI_PDC_EVENT INDEX 1 INTO DATA(WA_WSTI_PDC_EVENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSTI_PDC_EVENT>-MANDT = 1.
<WSTI_PDC_EVENT>-DOCNUM = 1.
<WSTI_PDC_EVENT>-WERKS = 1.
<WSTI_PDC_EVENT>-CREDAT = 1.
<WSTI_PDC_EVENT>-CRETIM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSTI_PDC_EVENT-IBLNR, sy-vline,
  WA_WSTI_PDC_EVENT-GJAHR, sy-vline,
  WA_WSTI_PDC_EVENT-COMMSTAT, sy-vline,
  WA_WSTI_PDC_EVENT-APPLSTAT, sy-vline,
  WA_WSTI_PDC_EVENT-DIRECT, sy-vline,
  WA_WSTI_PDC_EVENT-NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSTI_PDC_EVENT 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_WSTI_PDC_EVENT 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_WSTI_PDC_EVENT INTO WA_WSTI_PDC_EVENT.


*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 IBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_PDC_EVENT-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_PDC_EVENT-IBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_PDC_EVENT-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_PDC_EVENT-GJAHR.
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_WSTI_PDC_EVENT_STR, 
MANDT TYPE STRING,
DOCNUM TYPE STRING,
WERKS TYPE STRING,
CREDAT TYPE STRING,
CRETIM TYPE STRING,
IBLNR TYPE STRING,
GJAHR TYPE STRING,
COMMSTAT TYPE STRING,
APPLSTAT TYPE STRING,
DIRECT TYPE STRING,
NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSTI_PDC_EVENT_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_WSTI_PDC_EVENT_STR-MANDT sy-vline 
WA_WSTI_PDC_EVENT_STR-DOCNUM sy-vline 
WA_WSTI_PDC_EVENT_STR-WERKS sy-vline 
WA_WSTI_PDC_EVENT_STR-CREDAT sy-vline 
WA_WSTI_PDC_EVENT_STR-CRETIM sy-vline 
WA_WSTI_PDC_EVENT_STR-IBLNR sy-vline 
WA_WSTI_PDC_EVENT_STR-GJAHR sy-vline 
WA_WSTI_PDC_EVENT_STR-COMMSTAT sy-vline 
WA_WSTI_PDC_EVENT_STR-APPLSTAT sy-vline 
WA_WSTI_PDC_EVENT_STR-DIRECT sy-vline 
WA_WSTI_PDC_EVENT_STR-NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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