ABAP Select data from SAP table MSSCONNDATA into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSSCONNDATA
*  INTO TABLE @DATA(IT_MSSCONNDATA2).
*--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_MSSCONNDATA INDEX 1 INTO DATA(WA_MSSCONNDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSSCONNDATA>-RFCDEST = 1.
<MSSCONNDATA>-CON_NAME = 1.
<MSSCONNDATA>-DBSCHEMA = 1.
<MSSCONNDATA>-HOSTNAME = 1.
<MSSCONNDATA>-DBNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSSCONNDATA-DBUSER, sy-vline,
  WA_MSSCONNDATA-RFC_OK, sy-vline,
  WA_MSSCONNDATA-UNUSED1, sy-vline,
  WA_MSSCONNDATA-DBCON_OK, sy-vline,
  WA_MSSCONNDATA-UNUSED2, sy-vline,
  WA_MSSCONNDATA-DBO_OK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSSCONNDATA 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_MSSCONNDATA 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_MSSCONNDATA INTO WA_MSSCONNDATA.


*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_MSSCONNDATA_STR, 
RFCDEST TYPE STRING,
CON_NAME TYPE STRING,
DBSCHEMA TYPE STRING,
HOSTNAME TYPE STRING,
DBNAME TYPE STRING,
DBUSER TYPE STRING,
RFC_OK TYPE STRING,
UNUSED1 TYPE STRING,
DBCON_OK TYPE STRING,
UNUSED2 TYPE STRING,
DBO_OK TYPE STRING,
IS_BW TYPE STRING,
UNUSED3 TYPE STRING,
UNUSED4 TYPE STRING,
SCH_EXISTS TYPE STRING,
LOCALSYS TYPE STRING,
IS_ABAP TYPE STRING,
SAPRELEASE TYPE STRING,
EXTRELEASE TYPE STRING,
SQLRELEASE TYPE STRING,
DB_VERS TYPE STRING,
ERRCODE TYPE STRING,
MSGTY TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
USER_NAME TYPE STRING,
RAT_EXISTS TYPE STRING,
LOGIN_EXISTS TYPE STRING,
RFC_VERSION TYPE STRING,
PROCSVERS TYPE STRING,
DBRELEASE TYPE STRING,
ABAPSCHEMA TYPE STRING,
JAVASCHEMA TYPE STRING,
DB_BITS TYPE STRING,
PRIVILEG TYPE STRING,
ZERO_FOOTPRINT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSSCONNDATA_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_MSSCONNDATA_STR-RFCDEST sy-vline 
WA_MSSCONNDATA_STR-CON_NAME sy-vline 
WA_MSSCONNDATA_STR-DBSCHEMA sy-vline 
WA_MSSCONNDATA_STR-HOSTNAME sy-vline 
WA_MSSCONNDATA_STR-DBNAME sy-vline 
WA_MSSCONNDATA_STR-DBUSER sy-vline 
WA_MSSCONNDATA_STR-RFC_OK sy-vline 
WA_MSSCONNDATA_STR-UNUSED1 sy-vline 
WA_MSSCONNDATA_STR-DBCON_OK sy-vline 
WA_MSSCONNDATA_STR-UNUSED2 sy-vline 
WA_MSSCONNDATA_STR-DBO_OK sy-vline 
WA_MSSCONNDATA_STR-IS_BW sy-vline 
WA_MSSCONNDATA_STR-UNUSED3 sy-vline 
WA_MSSCONNDATA_STR-UNUSED4 sy-vline 
WA_MSSCONNDATA_STR-SCH_EXISTS sy-vline 
WA_MSSCONNDATA_STR-LOCALSYS sy-vline 
WA_MSSCONNDATA_STR-IS_ABAP sy-vline 
WA_MSSCONNDATA_STR-SAPRELEASE sy-vline 
WA_MSSCONNDATA_STR-EXTRELEASE sy-vline 
WA_MSSCONNDATA_STR-SQLRELEASE sy-vline 
WA_MSSCONNDATA_STR-DB_VERS sy-vline 
WA_MSSCONNDATA_STR-ERRCODE sy-vline 
WA_MSSCONNDATA_STR-MSGTY sy-vline 
WA_MSSCONNDATA_STR-MSGID sy-vline 
WA_MSSCONNDATA_STR-MSGNO sy-vline 
WA_MSSCONNDATA_STR-MSGV1 sy-vline 
WA_MSSCONNDATA_STR-MSGV2 sy-vline 
WA_MSSCONNDATA_STR-MSGV3 sy-vline 
WA_MSSCONNDATA_STR-MSGV4 sy-vline 
WA_MSSCONNDATA_STR-USER_NAME sy-vline 
WA_MSSCONNDATA_STR-RAT_EXISTS sy-vline 
WA_MSSCONNDATA_STR-LOGIN_EXISTS sy-vline 
WA_MSSCONNDATA_STR-RFC_VERSION sy-vline 
WA_MSSCONNDATA_STR-PROCSVERS sy-vline 
WA_MSSCONNDATA_STR-DBRELEASE sy-vline 
WA_MSSCONNDATA_STR-ABAPSCHEMA sy-vline 
WA_MSSCONNDATA_STR-JAVASCHEMA sy-vline 
WA_MSSCONNDATA_STR-DB_BITS sy-vline 
WA_MSSCONNDATA_STR-PRIVILEG sy-vline 
WA_MSSCONNDATA_STR-ZERO_FOOTPRINT sy-vline      INTO ld_text SEPARATED BY SPACE.

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