ABAP Select data from SAP table SDB_SRVST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SDB_SRVST
*  INTO TABLE @DATA(IT_SDB_SRVST2).
*--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_SDB_SRVST INDEX 1 INTO DATA(WA_SDB_SRVST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SDB_SRVST>-SDBSIZE = 1.
<SDB_SRVST>-MAXPNO = 1.
<SDB_SRVST>-MAXPERM = 1.
<SDB_SRVST>-USEDPERM = 1.
<SDB_SRVST>-PUSEDPERM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SDB_SRVST-USEDTMP, sy-vline,
  WA_SDB_SRVST-PUSEDTMP, sy-vline,
  WA_SDB_SRVST-UNUSED, sy-vline,
  WA_SDB_SRVST-PUNUSED, sy-vline,
  WA_SDB_SRVST-UPDPERM, sy-vline,
  WA_SDB_SRVST-SDBFULL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SDB_SRVST 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_SDB_SRVST 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_SDB_SRVST INTO WA_SDB_SRVST.


*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_SDB_SRVST_STR, 
SDBSIZE TYPE STRING,
MAXPNO TYPE STRING,
MAXPERM TYPE STRING,
USEDPERM TYPE STRING,
PUSEDPERM TYPE STRING,
USEDTMP TYPE STRING,
PUSEDTMP TYPE STRING,
UNUSED TYPE STRING,
PUNUSED TYPE STRING,
UPDPERM TYPE STRING,
SDBFULL TYPE STRING,
LOGSIZE TYPE STRING,
USEDLOG TYPE STRING,
PUSEDLOG TYPE STRING,
LOGNSAVED TYPE STRING,
PLOGNSAVED TYPE STRING,
LSINCEBCK TYPE STRING,
RESREDO TYPE STRING,
LOGSEGM TYPE STRING,
SAVEPNTS TYPE STRING,
CHECKPNTS TYPE STRING,
LOGMODE TYPE STRING,
USEDPAG TYPE STRING,
PUSEDPAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SDB_SRVST_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_SDB_SRVST_STR-SDBSIZE sy-vline 
WA_SDB_SRVST_STR-MAXPNO sy-vline 
WA_SDB_SRVST_STR-MAXPERM sy-vline 
WA_SDB_SRVST_STR-USEDPERM sy-vline 
WA_SDB_SRVST_STR-PUSEDPERM sy-vline 
WA_SDB_SRVST_STR-USEDTMP sy-vline 
WA_SDB_SRVST_STR-PUSEDTMP sy-vline 
WA_SDB_SRVST_STR-UNUSED sy-vline 
WA_SDB_SRVST_STR-PUNUSED sy-vline 
WA_SDB_SRVST_STR-UPDPERM sy-vline 
WA_SDB_SRVST_STR-SDBFULL sy-vline 
WA_SDB_SRVST_STR-LOGSIZE sy-vline 
WA_SDB_SRVST_STR-USEDLOG sy-vline 
WA_SDB_SRVST_STR-PUSEDLOG sy-vline 
WA_SDB_SRVST_STR-LOGNSAVED sy-vline 
WA_SDB_SRVST_STR-PLOGNSAVED sy-vline 
WA_SDB_SRVST_STR-LSINCEBCK sy-vline 
WA_SDB_SRVST_STR-RESREDO sy-vline 
WA_SDB_SRVST_STR-LOGSEGM sy-vline 
WA_SDB_SRVST_STR-SAVEPNTS sy-vline 
WA_SDB_SRVST_STR-CHECKPNTS sy-vline 
WA_SDB_SRVST_STR-LOGMODE sy-vline 
WA_SDB_SRVST_STR-USEDPAG sy-vline 
WA_SDB_SRVST_STR-PUSEDPAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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