ABAP Select data from SAP table MSS_STSERV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSS_STSERV
*  INTO TABLE @DATA(IT_MSS_STSERV2).
*--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_MSS_STSERV INDEX 1 INTO DATA(WA_MSS_STSERV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSS_STSERV>-HOSTNAME = 1.
<MSS_STSERV>-SQLVERSION = 1.
<MSS_STSERV>-SQLBUILDNM = 1.
<MSS_STSERV>-PRODLEVEL = 1.
<MSS_STSERV>-SQLSTARTTM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSS_STSERV-SQLEE, sy-vline,
  WA_MSS_STSERV-NTVER, sy-vline,
  WA_MSS_STSERV-PARAMDIFF, sy-vline,
  WA_MSS_STSERV-DISKPERF, sy-vline,
  WA_MSS_STSERV-ISCLUSTER, sy-vline,
  WA_MSS_STSERV-IS3GB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSS_STSERV 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_MSS_STSERV 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_MSS_STSERV INTO WA_MSS_STSERV.


*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_MSS_STSERV_STR, 
HOSTNAME TYPE STRING,
SQLVERSION TYPE STRING,
SQLBUILDNM TYPE STRING,
PRODLEVEL TYPE STRING,
SQLSTARTTM TYPE STRING,
SQLEE TYPE STRING,
NTVER TYPE STRING,
PARAMDIFF TYPE STRING,
DISKPERF TYPE STRING,
ISCLUSTER TYPE STRING,
IS3GB TYPE STRING,
ISPAE TYPE STRING,
ISAWE TYPE STRING,
CHIP TYPE STRING,
WINVER TYPE STRING,
NUMCPUS TYPE STRING,
SQLCPUS TYPE STRING,
MASK TYPE STRING,
PHYMEM TYPE STRING,
TRACEFLAGS TYPE STRING,
MEMSETTING TYPE STRING,
AGTLOGLOC TYPE STRING,
ERRLOGLOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSS_STSERV_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_MSS_STSERV_STR-HOSTNAME sy-vline 
WA_MSS_STSERV_STR-SQLVERSION sy-vline 
WA_MSS_STSERV_STR-SQLBUILDNM sy-vline 
WA_MSS_STSERV_STR-PRODLEVEL sy-vline 
WA_MSS_STSERV_STR-SQLSTARTTM sy-vline 
WA_MSS_STSERV_STR-SQLEE sy-vline 
WA_MSS_STSERV_STR-NTVER sy-vline 
WA_MSS_STSERV_STR-PARAMDIFF sy-vline 
WA_MSS_STSERV_STR-DISKPERF sy-vline 
WA_MSS_STSERV_STR-ISCLUSTER sy-vline 
WA_MSS_STSERV_STR-IS3GB sy-vline 
WA_MSS_STSERV_STR-ISPAE sy-vline 
WA_MSS_STSERV_STR-ISAWE sy-vline 
WA_MSS_STSERV_STR-CHIP sy-vline 
WA_MSS_STSERV_STR-WINVER sy-vline 
WA_MSS_STSERV_STR-NUMCPUS sy-vline 
WA_MSS_STSERV_STR-SQLCPUS sy-vline 
WA_MSS_STSERV_STR-MASK sy-vline 
WA_MSS_STSERV_STR-PHYMEM sy-vline 
WA_MSS_STSERV_STR-TRACEFLAGS sy-vline 
WA_MSS_STSERV_STR-MEMSETTING sy-vline 
WA_MSS_STSERV_STR-AGTLOGLOC sy-vline 
WA_MSS_STSERV_STR-ERRLOGLOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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