ABAP Select data from SAP table INSTVERS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INSTVERS
*  INTO TABLE @DATA(IT_INSTVERS2).
*--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_INSTVERS INDEX 1 INTO DATA(WA_INSTVERS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INSTVERS>-ID = 1.
<INSTVERS>-R3RELEASE = 1.
<INSTVERS>-SAPSID = 1.
<INSTVERS>-SYSID = 1.
<INSTVERS>-OPSYS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INSTVERS-HOSTNAME, sy-vline,
  WA_INSTVERS-DBHOSTNAME, sy-vline,
  WA_INSTVERS-DBTYPE, sy-vline,
  WA_INSTVERS-DATUM, sy-vline,
  WA_INSTVERS-TIME, sy-vline,
  WA_INSTVERS-ACTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INSTVERS 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_INSTVERS 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_INSTVERS INTO WA_INSTVERS.


*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_INSTVERS_STR, 
ID TYPE STRING,
R3RELEASE TYPE STRING,
SAPSID TYPE STRING,
SYSID TYPE STRING,
OPSYS TYPE STRING,
HOSTNAME TYPE STRING,
DBHOSTNAME TYPE STRING,
DBTYPE TYPE STRING,
DATUM TYPE STRING,
TIME TYPE STRING,
ACTION TYPE STRING,
STATUS TYPE STRING,
TOOL TYPE STRING,
INFO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INSTVERS_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_INSTVERS_STR-ID sy-vline 
WA_INSTVERS_STR-R3RELEASE sy-vline 
WA_INSTVERS_STR-SAPSID sy-vline 
WA_INSTVERS_STR-SYSID sy-vline 
WA_INSTVERS_STR-OPSYS sy-vline 
WA_INSTVERS_STR-HOSTNAME sy-vline 
WA_INSTVERS_STR-DBHOSTNAME sy-vline 
WA_INSTVERS_STR-DBTYPE sy-vline 
WA_INSTVERS_STR-DATUM sy-vline 
WA_INSTVERS_STR-TIME sy-vline 
WA_INSTVERS_STR-ACTION sy-vline 
WA_INSTVERS_STR-STATUS sy-vline 
WA_INSTVERS_STR-TOOL sy-vline 
WA_INSTVERS_STR-INFO sy-vline      INTO ld_text SEPARATED BY SPACE.

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