ABAP Select data from SAP table SIT2_INST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SIT2_INST 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 SIT2_INST. 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 SIT2_INST 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_SIT2_INST TYPE STANDARD TABLE OF SIT2_INST,
      WA_SIT2_INST TYPE SIT2_INST,
      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: <SIT2_INST> TYPE SIT2_INST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SIT2_INST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SIT2_INST
  INTO TABLE IT_SIT2_INST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SIT2_INST
*  INTO TABLE @DATA(IT_SIT2_INST2).
*--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_SIT2_INST INDEX 1 INTO DATA(WA_SIT2_INST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SIT2_INST ASSIGNING <SIT2_INST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SIT2_INST>-CLIENT = 1.
<SIT2_INST>-SITNINSTCEKEY = 1.
<SIT2_INST>-SITNINSTCESEMKEY = 1.
<SIT2_INST>-SITNBASETEMPLATEID = 1.
<SIT2_INST>-SITNBASETMPLOBJECTGROUPID = 1.

ENDLOOP.

LOOP AT IT_SIT2_INST INTO WA_SIT2_INST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SIT2_INST-SITNCONFIGNTEMPLATEID, sy-vline,
  WA_SIT2_INST-SITNTYPEID, sy-vline,
  WA_SIT2_INST-SITNTYPEVERSION, sy-vline,
  WA_SIT2_INST-SITNOBJECTGROUPID, sy-vline,
  WA_SIT2_INST-SITNCNDNFILTERGROUPID, sy-vline,
  WA_SIT2_INST-SITNINSTCEMESSAGEOBJKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SIT2_INST 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_SIT2_INST 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_SIT2_INST INTO WA_SIT2_INST.


*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_SIT2_INST_STR, 
CLIENT TYPE STRING,
SITNINSTCEKEY TYPE STRING,
SITNINSTCESEMKEY TYPE STRING,
SITNBASETEMPLATEID TYPE STRING,
SITNBASETMPLOBJECTGROUPID TYPE STRING,
SITNCONFIGNTEMPLATEID TYPE STRING,
SITNTYPEID TYPE STRING,
SITNTYPEVERSION TYPE STRING,
SITNOBJECTGROUPID TYPE STRING,
SITNCNDNFILTERGROUPID TYPE STRING,
SITNINSTCEMESSAGEOBJKEY TYPE STRING,
SITNINSTCEEVENTOBJKEY TYPE STRING,
SITNINSTCETRIGGEROBJKEY TYPE STRING,
SITNINSTCETRGOBJSEMKEY TYPE STRING,
SITNINSTCEANCHOROBJKEY TYPE STRING,
SITNINSTCEANCOBJSEMKEY TYPE STRING,
SITNINSTCESTATUS TYPE STRING,
SITNINSTCEISAGGREGATED TYPE STRING,
SITNINSTCEOCCURRENCES TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATEDDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDDATETIME TYPE STRING,
PROCESSEDBYUSER TYPE STRING,
PROCESSEDDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SIT2_INST_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_SIT2_INST_STR-CLIENT sy-vline 
WA_SIT2_INST_STR-SITNINSTCEKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCESEMKEY sy-vline 
WA_SIT2_INST_STR-SITNBASETEMPLATEID sy-vline 
WA_SIT2_INST_STR-SITNBASETMPLOBJECTGROUPID sy-vline 
WA_SIT2_INST_STR-SITNCONFIGNTEMPLATEID sy-vline 
WA_SIT2_INST_STR-SITNTYPEID sy-vline 
WA_SIT2_INST_STR-SITNTYPEVERSION sy-vline 
WA_SIT2_INST_STR-SITNOBJECTGROUPID sy-vline 
WA_SIT2_INST_STR-SITNCNDNFILTERGROUPID sy-vline 
WA_SIT2_INST_STR-SITNINSTCEMESSAGEOBJKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCEEVENTOBJKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCETRIGGEROBJKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCETRGOBJSEMKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCEANCHOROBJKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCEANCOBJSEMKEY sy-vline 
WA_SIT2_INST_STR-SITNINSTCESTATUS sy-vline 
WA_SIT2_INST_STR-SITNINSTCEISAGGREGATED sy-vline 
WA_SIT2_INST_STR-SITNINSTCEOCCURRENCES sy-vline 
WA_SIT2_INST_STR-CREATEDBYUSER sy-vline 
WA_SIT2_INST_STR-CREATEDDATETIME sy-vline 
WA_SIT2_INST_STR-LASTCHANGEDBYUSER sy-vline 
WA_SIT2_INST_STR-LASTCHANGEDDATETIME sy-vline 
WA_SIT2_INST_STR-PROCESSEDBYUSER sy-vline 
WA_SIT2_INST_STR-PROCESSEDDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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