ABAP Select data from SAP table WSTI_POS_EVENT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP WSTI_POS_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_POS_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_POS_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_POS_EVENT TYPE STANDARD TABLE OF WSTI_POS_EVENT,
      WA_WSTI_POS_EVENT TYPE WSTI_POS_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_POS_EVENT> TYPE WSTI_POS_EVENT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSTI_POS_EVENT
*  INTO TABLE @DATA(IT_WSTI_POS_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_POS_EVENT INDEX 1 INTO DATA(WA_WSTI_POS_EVENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSTI_POS_EVENT>-MANDT = 1.
<WSTI_POS_EVENT>-WERKS = 1.
<WSTI_POS_EVENT>-MATNR = 1.
<WSTI_POS_EVENT>-LGORT = 1.
<WSTI_POS_EVENT>-VORGDATUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSTI_POS_EVENT-VORGZEIT, sy-vline,
  WA_WSTI_POS_EVENT-MBLNR, sy-vline,
  WA_WSTI_POS_EVENT-CNTNR, sy-vline,
  WA_WSTI_POS_EVENT-MJAHR, sy-vline,
  WA_WSTI_POS_EVENT-ZEILE, sy-vline,
  WA_WSTI_POS_EVENT-CPUDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSTI_POS_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_POS_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_POS_EVENT INTO WA_WSTI_POS_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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_POS_EVENT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_POS_EVENT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_POS_EVENT-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_POS_EVENT-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_POS_EVENT-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_POS_EVENT-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_POS_EVENT-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_POS_EVENT-ERFME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_POS_EVENT-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_POS_EVENT-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field EMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_POS_EVENT-EMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_POS_EVENT-EMATNR.
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_POS_EVENT_STR, 
MANDT TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
LGORT TYPE STRING,
VORGDATUM TYPE STRING,
VORGZEIT TYPE STRING,
MBLNR TYPE STRING,
CNTNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
STATPI TYPE STRING,
ORIGIN TYPE STRING,
STORNO TYPE STRING,
SIGN TYPE STRING,
SIGN_CALC TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
EXVKW TYPE STRING,
WAERS TYPE STRING,
BSTAR TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
CHARG TYPE STRING,
WAART TYPE STRING,
EMATNR TYPE STRING,
DOCNUM TYPE STRING,
XBUIB_DONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSTI_POS_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_POS_EVENT_STR-MANDT sy-vline 
WA_WSTI_POS_EVENT_STR-WERKS sy-vline 
WA_WSTI_POS_EVENT_STR-MATNR sy-vline 
WA_WSTI_POS_EVENT_STR-LGORT sy-vline 
WA_WSTI_POS_EVENT_STR-VORGDATUM sy-vline 
WA_WSTI_POS_EVENT_STR-VORGZEIT sy-vline 
WA_WSTI_POS_EVENT_STR-MBLNR sy-vline 
WA_WSTI_POS_EVENT_STR-CNTNR sy-vline 
WA_WSTI_POS_EVENT_STR-MJAHR sy-vline 
WA_WSTI_POS_EVENT_STR-ZEILE sy-vline 
WA_WSTI_POS_EVENT_STR-CPUDT sy-vline 
WA_WSTI_POS_EVENT_STR-CPUTM sy-vline 
WA_WSTI_POS_EVENT_STR-STATPI sy-vline 
WA_WSTI_POS_EVENT_STR-ORIGIN sy-vline 
WA_WSTI_POS_EVENT_STR-STORNO sy-vline 
WA_WSTI_POS_EVENT_STR-SIGN sy-vline 
WA_WSTI_POS_EVENT_STR-SIGN_CALC sy-vline 
WA_WSTI_POS_EVENT_STR-ERFMG sy-vline 
WA_WSTI_POS_EVENT_STR-ERFME sy-vline 
WA_WSTI_POS_EVENT_STR-MENGE sy-vline 
WA_WSTI_POS_EVENT_STR-MEINS sy-vline 
WA_WSTI_POS_EVENT_STR-EXVKW sy-vline 
WA_WSTI_POS_EVENT_STR-WAERS sy-vline 
WA_WSTI_POS_EVENT_STR-BSTAR sy-vline 
WA_WSTI_POS_EVENT_STR-SOBKZ sy-vline 
WA_WSTI_POS_EVENT_STR-LIFNR sy-vline 
WA_WSTI_POS_EVENT_STR-CHARG sy-vline 
WA_WSTI_POS_EVENT_STR-WAART sy-vline 
WA_WSTI_POS_EVENT_STR-EMATNR sy-vline 
WA_WSTI_POS_EVENT_STR-DOCNUM sy-vline 
WA_WSTI_POS_EVENT_STR-XBUIB_DONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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