ABAP Select data from SAP table SPERFSTAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SPERFSTAT
*  INTO TABLE @DATA(IT_SPERFSTAT2).
*--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_SPERFSTAT INDEX 1 INTO DATA(WA_SPERFSTAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SPERFSTAT>-STARTDATE = 1.
<SPERFSTAT>-STARTTIME = 1.
<SPERFSTAT>-ENDDATE = 1.
<SPERFSTAT>-ENDTIME = 1.
<SPERFSTAT>-TCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SPERFSTAT-REPORT, sy-vline,
  WA_SPERFSTAT-TASKTYPE, sy-vline,
  WA_SPERFSTAT-DYNPRONR, sy-vline,
  WA_SPERFSTAT-WPROCTIME, sy-vline,
  WA_SPERFSTAT-KBYTETRANS, sy-vline,
  WA_SPERFSTAT-RESPTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SPERFSTAT 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_SPERFSTAT 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_SPERFSTAT INTO WA_SPERFSTAT.


*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_SPERFSTAT_STR, 
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
TCODE TYPE STRING,
REPORT TYPE STRING,
TASKTYPE TYPE STRING,
DYNPRONR TYPE STRING,
WPROCTIME TYPE STRING,
KBYTETRANS TYPE STRING,
RESPTIME TYPE STRING,
WAITTIME TYPE STRING,
CPUTIME TYPE STRING,
LDGENTIME TYPE STRING,
MEMORYUSED TYPE STRING,
DBTIME TYPE STRING,
DBCHANGES TYPE STRING,
ROUNDTRIPS TYPE STRING,
INDATA TYPE STRING,
OUTDATA TYPE STRING,
RECPROCNUM_ST TYPE STRING,
TOTALEX_ST TYPE STRING,
TRANS_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SPERFSTAT_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_SPERFSTAT_STR-STARTDATE sy-vline 
WA_SPERFSTAT_STR-STARTTIME sy-vline 
WA_SPERFSTAT_STR-ENDDATE sy-vline 
WA_SPERFSTAT_STR-ENDTIME sy-vline 
WA_SPERFSTAT_STR-TCODE sy-vline 
WA_SPERFSTAT_STR-REPORT sy-vline 
WA_SPERFSTAT_STR-TASKTYPE sy-vline 
WA_SPERFSTAT_STR-DYNPRONR sy-vline 
WA_SPERFSTAT_STR-WPROCTIME sy-vline 
WA_SPERFSTAT_STR-KBYTETRANS sy-vline 
WA_SPERFSTAT_STR-RESPTIME sy-vline 
WA_SPERFSTAT_STR-WAITTIME sy-vline 
WA_SPERFSTAT_STR-CPUTIME sy-vline 
WA_SPERFSTAT_STR-LDGENTIME sy-vline 
WA_SPERFSTAT_STR-MEMORYUSED sy-vline 
WA_SPERFSTAT_STR-DBTIME sy-vline 
WA_SPERFSTAT_STR-DBCHANGES sy-vline 
WA_SPERFSTAT_STR-ROUNDTRIPS sy-vline 
WA_SPERFSTAT_STR-INDATA sy-vline 
WA_SPERFSTAT_STR-OUTDATA sy-vline 
WA_SPERFSTAT_STR-RECPROCNUM_ST sy-vline 
WA_SPERFSTAT_STR-TOTALEX_ST sy-vline 
WA_SPERFSTAT_STR-TRANS_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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