ABAP Select data from SAP table ISITNACTYMNTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISITNACTYMNTR
*  INTO TABLE @DATA(IT_ISITNACTYMNTR2).
*--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_ISITNACTYMNTR INDEX 1 INTO DATA(WA_ISITNACTYMNTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISITNACTYMNTR>-MANDT = 1.
<ISITNACTYMNTR>-SITNINSTCEACTIVITYID = 1.
<ISITNACTYMNTR>-SITNDEFINITIONID = 1.
<ISITNACTYMNTR>-SITNINSTANCEID = 1.
<ISITNACTYMNTR>-SITNINSTCEACTYTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISITNACTYMNTR-SITNACTIONID, sy-vline,
  WA_ISITNACTYMNTR-SITNINSTCEACTYDATETIME, sy-vline,
  WA_ISITNACTYMNTR-SITNINSTCEACTYTYPEDESC, sy-vline,
  WA_ISITNACTYMNTR-SITNINSTCEANCHOROBJECTKEY, sy-vline,
  WA_ISITNACTYMNTR-SITNINSTCETRIGGEROBJECTKEY, sy-vline,
  WA_ISITNACTYMNTR-SITNINSTCESTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISITNACTYMNTR 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_ISITNACTYMNTR 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_ISITNACTYMNTR INTO WA_ISITNACTYMNTR.


*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_ISITNACTYMNTR_STR, 
MANDT TYPE STRING,
SITNINSTCEACTIVITYID TYPE STRING,
SITNDEFINITIONID TYPE STRING,
SITNINSTANCEID TYPE STRING,
SITNINSTCEACTYTYPE TYPE STRING,
SITNACTIONID TYPE STRING,
SITNINSTCEACTYDATETIME TYPE STRING,
SITNINSTCEACTYTYPEDESC TYPE STRING,
SITNINSTCEANCHOROBJECTKEY TYPE STRING,
SITNINSTCETRIGGEROBJECTKEY TYPE STRING,
SITNINSTCESTATUS TYPE STRING,
SITUATIONINSTANCESTATUSDESC TYPE STRING,
SITNINSTCEACTIVITYTRIGGER TYPE STRING,
SITNINSTCEACTIVITYTRIGGERDESC TYPE STRING,
SITNINSTCEACTYDATE TYPE STRING,
CALENDARYEAR TYPE STRING,
SITNDEFANCHOROBJECT TYPE STRING,
SITNTRIGGEROBJECTKEYFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISITNACTYMNTR_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_ISITNACTYMNTR_STR-MANDT sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTIVITYID sy-vline 
WA_ISITNACTYMNTR_STR-SITNDEFINITIONID sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTANCEID sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTYTYPE sy-vline 
WA_ISITNACTYMNTR_STR-SITNACTIONID sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTYDATETIME sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTYTYPEDESC sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEANCHOROBJECTKEY sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCETRIGGEROBJECTKEY sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCESTATUS sy-vline 
WA_ISITNACTYMNTR_STR-SITUATIONINSTANCESTATUSDESC sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTIVITYTRIGGER sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTIVITYTRIGGERDESC sy-vline 
WA_ISITNACTYMNTR_STR-SITNINSTCEACTYDATE sy-vline 
WA_ISITNACTYMNTR_STR-CALENDARYEAR sy-vline 
WA_ISITNACTYMNTR_STR-SITNDEFANCHOROBJECT sy-vline 
WA_ISITNACTYMNTR_STR-SITNTRIGGEROBJECTKEYFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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