ABAP Select data from SAP table BPM_WIHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BPM_WIHEAD
*  INTO TABLE @DATA(IT_BPM_WIHEAD2).
*--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_BPM_WIHEAD INDEX 1 INTO DATA(WA_BPM_WIHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BPM_WIHEAD>-ROCANCEL = 1.
<BPM_WIHEAD>-WI_ID = 1.
<BPM_WIHEAD>-WI_TASK = 1.
<BPM_WIHEAD>-WI_TASK_VER = 1.
<BPM_WIHEAD>-WI_EXETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BPM_WIHEAD-WI_NODEID, sy-vline,
  WA_BPM_WIHEAD-PARENT_ID, sy-vline,
  WA_BPM_WIHEAD-PARENT_TASK, sy-vline,
  WA_BPM_WIHEAD-PARENT_TASK_VER, sy-vline,
  WA_BPM_WIHEAD-PARENT_EXETYPE, sy-vline,
  WA_BPM_WIHEAD-TOP_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BPM_WIHEAD 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_BPM_WIHEAD 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_BPM_WIHEAD INTO WA_BPM_WIHEAD.


*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 ISOLA, internal->external for field WI_LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BPM_WIHEAD-WI_LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BPM_WIHEAD-WI_LANG.
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_BPM_WIHEAD_STR, 
ROCANCEL TYPE STRING,
WI_ID TYPE STRING,
WI_TASK TYPE STRING,
WI_TASK_VER TYPE STRING,
WI_EXETYPE TYPE STRING,
WI_NODEID TYPE STRING,
PARENT_ID TYPE STRING,
PARENT_TASK TYPE STRING,
PARENT_TASK_VER TYPE STRING,
PARENT_EXETYPE TYPE STRING,
TOP_ID TYPE STRING,
TOP_TASK TYPE STRING,
TOP_TASK_VER TYPE STRING,
TOP_EXETYPE TYPE STRING,
WI_TYPE TYPE STRING,
WF_TYPE TYPE STRING,
PROCCAT TYPE STRING,
NOTE_COUNT TYPE STRING,
WI_LANG TYPE STRING,
WI_STAT TYPE STRING,
CREA_TMP TYPE STRING,
LAST_CHG_TMP TYPE STRING,
EXEC_TIME TYPE STRING,
WI_CRUSER TYPE STRING,
WI_AAGENT TYPE STRING,
WI_FORW_BY TYPE STRING,
WI_PRIO TYPE STRING,
RETRY_CNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BPM_WIHEAD_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_BPM_WIHEAD_STR-ROCANCEL sy-vline 
WA_BPM_WIHEAD_STR-WI_ID sy-vline 
WA_BPM_WIHEAD_STR-WI_TASK sy-vline 
WA_BPM_WIHEAD_STR-WI_TASK_VER sy-vline 
WA_BPM_WIHEAD_STR-WI_EXETYPE sy-vline 
WA_BPM_WIHEAD_STR-WI_NODEID sy-vline 
WA_BPM_WIHEAD_STR-PARENT_ID sy-vline 
WA_BPM_WIHEAD_STR-PARENT_TASK sy-vline 
WA_BPM_WIHEAD_STR-PARENT_TASK_VER sy-vline 
WA_BPM_WIHEAD_STR-PARENT_EXETYPE sy-vline 
WA_BPM_WIHEAD_STR-TOP_ID sy-vline 
WA_BPM_WIHEAD_STR-TOP_TASK sy-vline 
WA_BPM_WIHEAD_STR-TOP_TASK_VER sy-vline 
WA_BPM_WIHEAD_STR-TOP_EXETYPE sy-vline 
WA_BPM_WIHEAD_STR-WI_TYPE sy-vline 
WA_BPM_WIHEAD_STR-WF_TYPE sy-vline 
WA_BPM_WIHEAD_STR-PROCCAT sy-vline 
WA_BPM_WIHEAD_STR-NOTE_COUNT sy-vline 
WA_BPM_WIHEAD_STR-WI_LANG sy-vline 
WA_BPM_WIHEAD_STR-WI_STAT sy-vline 
WA_BPM_WIHEAD_STR-CREA_TMP sy-vline 
WA_BPM_WIHEAD_STR-LAST_CHG_TMP sy-vline 
WA_BPM_WIHEAD_STR-EXEC_TIME sy-vline 
WA_BPM_WIHEAD_STR-WI_CRUSER sy-vline 
WA_BPM_WIHEAD_STR-WI_AAGENT sy-vline 
WA_BPM_WIHEAD_STR-WI_FORW_BY sy-vline 
WA_BPM_WIHEAD_STR-WI_PRIO sy-vline 
WA_BPM_WIHEAD_STR-RETRY_CNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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