ABAP Select data from SAP table CPETASKLOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPETASKLOG
*  INTO TABLE @DATA(IT_CPETASKLOG2).
*--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_CPETASKLOG INDEX 1 INTO DATA(WA_CPETASKLOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPETASKLOG>-GUID = 1.
<CPETASKLOG>-PARENTID = 1.
<CPETASKLOG>-CREATOR = 1.
<CPETASKLOG>-BIZOBJTYPE = 1.
<CPETASKLOG>-BIZOBJKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPETASKLOG-ASSIGNEELIST, sy-vline,
  WA_CPETASKLOG-SUBJECT, sy-vline,
  WA_CPETASKLOG-DESCRIPTION, sy-vline,
  WA_CPETASKLOG-PRIORITY, sy-vline,
  WA_CPETASKLOG-DUE, sy-vline,
  WA_CPETASKLOG-CPEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPETASKLOG 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_CPETASKLOG 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_CPETASKLOG INTO WA_CPETASKLOG.


*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_CPETASKLOG_STR, 
GUID TYPE STRING,
PARENTID TYPE STRING,
CREATOR TYPE STRING,
BIZOBJTYPE TYPE STRING,
BIZOBJKEY TYPE STRING,
ASSIGNEELIST TYPE STRING,
SUBJECT TYPE STRING,
DESCRIPTION TYPE STRING,
PRIORITY TYPE STRING,
DUE TYPE STRING,
CPEDATE TYPE STRING,
CPETIME TYPE STRING,
TRACKERLIST TYPE STRING,
FINALAPPROVAL TYPE STRING,
ALLOWDECLINE TYPE STRING,
SEPARATETASK TYPE STRING,
NOTIFICATION TYPE STRING,
URL TYPE STRING,
THRESHOLD TYPE STRING,
CPEINSTANCEID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPETASKLOG_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_CPETASKLOG_STR-GUID sy-vline 
WA_CPETASKLOG_STR-PARENTID sy-vline 
WA_CPETASKLOG_STR-CREATOR sy-vline 
WA_CPETASKLOG_STR-BIZOBJTYPE sy-vline 
WA_CPETASKLOG_STR-BIZOBJKEY sy-vline 
WA_CPETASKLOG_STR-ASSIGNEELIST sy-vline 
WA_CPETASKLOG_STR-SUBJECT sy-vline 
WA_CPETASKLOG_STR-DESCRIPTION sy-vline 
WA_CPETASKLOG_STR-PRIORITY sy-vline 
WA_CPETASKLOG_STR-DUE sy-vline 
WA_CPETASKLOG_STR-CPEDATE sy-vline 
WA_CPETASKLOG_STR-CPETIME sy-vline 
WA_CPETASKLOG_STR-TRACKERLIST sy-vline 
WA_CPETASKLOG_STR-FINALAPPROVAL sy-vline 
WA_CPETASKLOG_STR-ALLOWDECLINE sy-vline 
WA_CPETASKLOG_STR-SEPARATETASK sy-vline 
WA_CPETASKLOG_STR-NOTIFICATION sy-vline 
WA_CPETASKLOG_STR-URL sy-vline 
WA_CPETASKLOG_STR-THRESHOLD sy-vline 
WA_CPETASKLOG_STR-CPEINSTANCEID sy-vline      INTO ld_text SEPARATED BY SPACE.

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