ABAP Select data from SAP table WPINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WPINFO
*  INTO TABLE @DATA(IT_WPINFO2).
*--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_WPINFO INDEX 1 INTO DATA(WA_WPINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WPINFO>-WP_NO = 1.
<WPINFO>-WP_ITYPE = 1.
<WPINFO>-WP_TYP = 1.
<WPINFO>-WP_PID = 1.
<WPINFO>-WP_ISTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WPINFO-WP_STATUS, sy-vline,
  WA_WPINFO-WP_IWAIT, sy-vline,
  WA_WPINFO-WP_WAITING, sy-vline,
  WA_WPINFO-WP_SEM, sy-vline,
  WA_WPINFO-WP_IRESTRT, sy-vline,
  WA_WPINFO-WP_RESTART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WPINFO 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_WPINFO 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_WPINFO INTO WA_WPINFO.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WPINFO_STR, 
WP_NO TYPE STRING,
WP_ITYPE TYPE STRING,
WP_TYP TYPE STRING,
WP_PID TYPE STRING,
WP_ISTATUS TYPE STRING,
WP_STATUS TYPE STRING,
WP_IWAIT TYPE STRING,
WP_WAITING TYPE STRING,
WP_SEM TYPE STRING,
WP_IRESTRT TYPE STRING,
WP_RESTART TYPE STRING,
WP_DUMPS TYPE STRING,
WP_CPU TYPE STRING,
WP_ELTIME TYPE STRING,
WP_MANDT TYPE STRING,
WP_BNAME TYPE STRING,
WP_REPORT TYPE STRING,
WP_IACTION TYPE STRING,
WP_ACTION TYPE STRING,
WP_TABLE TYPE STRING,
WP_SERVER TYPE STRING,
WP_WAITINF TYPE STRING,
WP_WAITTIM TYPE STRING,
WP_SEMSTAT TYPE STRING,
WP_INDEX TYPE STRING,
WP_SEM1 TYPE STRING,
WP_SEM2 TYPE STRING,
WP_SEM3 TYPE STRING,
WP_SEM4 TYPE STRING,
WP_SEM5 TYPE STRING,
WP_SEM_LOCKING TYPE STRING,
WP_MTX TYPE STRING,
WP_MTX_EXCL TYPE STRING,
WP_MTX_SHRD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WPINFO_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_WPINFO_STR-WP_NO sy-vline 
WA_WPINFO_STR-WP_ITYPE sy-vline 
WA_WPINFO_STR-WP_TYP sy-vline 
WA_WPINFO_STR-WP_PID sy-vline 
WA_WPINFO_STR-WP_ISTATUS sy-vline 
WA_WPINFO_STR-WP_STATUS sy-vline 
WA_WPINFO_STR-WP_IWAIT sy-vline 
WA_WPINFO_STR-WP_WAITING sy-vline 
WA_WPINFO_STR-WP_SEM sy-vline 
WA_WPINFO_STR-WP_IRESTRT sy-vline 
WA_WPINFO_STR-WP_RESTART sy-vline 
WA_WPINFO_STR-WP_DUMPS sy-vline 
WA_WPINFO_STR-WP_CPU sy-vline 
WA_WPINFO_STR-WP_ELTIME sy-vline 
WA_WPINFO_STR-WP_MANDT sy-vline 
WA_WPINFO_STR-WP_BNAME sy-vline 
WA_WPINFO_STR-WP_REPORT sy-vline 
WA_WPINFO_STR-WP_IACTION sy-vline 
WA_WPINFO_STR-WP_ACTION sy-vline 
WA_WPINFO_STR-WP_TABLE sy-vline 
WA_WPINFO_STR-WP_SERVER sy-vline 
WA_WPINFO_STR-WP_WAITINF sy-vline 
WA_WPINFO_STR-WP_WAITTIM sy-vline 
WA_WPINFO_STR-WP_SEMSTAT sy-vline 
WA_WPINFO_STR-WP_INDEX sy-vline 
WA_WPINFO_STR-WP_SEM1 sy-vline 
WA_WPINFO_STR-WP_SEM2 sy-vline 
WA_WPINFO_STR-WP_SEM3 sy-vline 
WA_WPINFO_STR-WP_SEM4 sy-vline 
WA_WPINFO_STR-WP_SEM5 sy-vline 
WA_WPINFO_STR-WP_SEM_LOCKING sy-vline 
WA_WPINFO_STR-WP_MTX sy-vline 
WA_WPINFO_STR-WP_MTX_EXCL sy-vline 
WA_WPINFO_STR-WP_MTX_SHRD sy-vline      INTO ld_text SEPARATED BY SPACE.

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