ABAP Select data from SAP table WSTI_PDC_EVENT_EX 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_EX 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_EX. 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_EX 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_EX TYPE STANDARD TABLE OF WSTI_PDC_EVENT_EX,
      WA_WSTI_PDC_EVENT_EX TYPE WSTI_PDC_EVENT_EX,
      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_EX> TYPE WSTI_PDC_EVENT_EX.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSTI_PDC_EVENT_EX
*  INTO TABLE @DATA(IT_WSTI_PDC_EVENT_EX2).
*--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_EX INDEX 1 INTO DATA(WA_WSTI_PDC_EVENT_EX2).


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

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

ENDLOOP.

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

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


*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_EX-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_PDC_EVENT_EX-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_EX-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_PDC_EVENT_EX-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_EX_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,
PDC_STATUS TYPE STRING,
CREDAT_CHAR TYPE STRING,
CRETIM_CHAR TYPE STRING,
NUMBER_MSG TYPE STRING,
MAXSEGNUM TYPE STRING,
ERRORCOUNT TYPE STRING,
MSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSTI_PDC_EVENT_EX_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_EX_STR-MANDT sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-DOCNUM sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-WERKS sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-CREDAT sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-CRETIM sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-IBLNR sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-GJAHR sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-COMMSTAT sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-APPLSTAT sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-DIRECT sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-NAME sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-PDC_STATUS sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-CREDAT_CHAR sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-CRETIM_CHAR sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-NUMBER_MSG sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-MAXSEGNUM sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-ERRORCOUNT sy-vline 
WA_WSTI_PDC_EVENT_EX_STR-MSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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