ABAP Select data from SAP table SYB_XCHG_ENGINE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SYB_XCHG_ENGINE
*  INTO TABLE @DATA(IT_SYB_XCHG_ENGINE2).
*--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_SYB_XCHG_ENGINE INDEX 1 INTO DATA(WA_SYB_XCHG_ENGINE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SYB_XCHG_ENGINE>-ENGINE = 1.
<SYB_XCHG_ENGINE>-ENGINENUMBER = 1.
<SYB_XCHG_ENGINE>-INSTANCEID = 1.
<SYB_XCHG_ENGINE>-CURRENTKPID = 1.
<SYB_XCHG_ENGINE>-PREVIOUSKPID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SYB_XCHG_ENGINE-CPUTIME, sy-vline,
  WA_SYB_XCHG_ENGINE-SYSTEMCPUTIME, sy-vline,
  WA_SYB_XCHG_ENGINE-USERCPUTIME, sy-vline,
  WA_SYB_XCHG_ENGINE-IOCPUTIME, sy-vline,
  WA_SYB_XCHG_ENGINE-IDLECPUTIME, sy-vline,
  WA_SYB_XCHG_ENGINE-YIELDS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SYB_XCHG_ENGINE 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_SYB_XCHG_ENGINE 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_SYB_XCHG_ENGINE INTO WA_SYB_XCHG_ENGINE.


*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_SYB_XCHG_ENGINE_STR, 
ENGINE TYPE STRING,
ENGINENUMBER TYPE STRING,
INSTANCEID TYPE STRING,
CURRENTKPID TYPE STRING,
PREVIOUSKPID TYPE STRING,
CPUTIME TYPE STRING,
SYSTEMCPUTIME TYPE STRING,
USERCPUTIME TYPE STRING,
IOCPUTIME TYPE STRING,
IDLECPUTIME TYPE STRING,
YIELDS TYPE STRING,
CONNECTIONS TYPE STRING,
DISKIOCHECKS TYPE STRING,
DISKIOPOLLED TYPE STRING,
DISKIOCOMPLETED TYPE STRING,
MAXOUTSTANDINGIOS TYPE STRING,
PROCESSESAFFINITIED TYPE STRING,
CONTEXTSWITCHES TYPE STRING,
HKGCMAXQSIZE TYPE STRING,
HKGCPENDINGITEMS TYPE STRING,
HKGCHWMITEMS TYPE STRING,
HKGCOVERFLOWS TYPE STRING,
STATUS TYPE STRING,
STARTTIME TYPE STRING,
STOPTIME TYPE STRING,
AFFINITIEDTOCPU TYPE STRING,
OSPID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SYB_XCHG_ENGINE_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_SYB_XCHG_ENGINE_STR-ENGINE sy-vline 
WA_SYB_XCHG_ENGINE_STR-ENGINENUMBER sy-vline 
WA_SYB_XCHG_ENGINE_STR-INSTANCEID sy-vline 
WA_SYB_XCHG_ENGINE_STR-CURRENTKPID sy-vline 
WA_SYB_XCHG_ENGINE_STR-PREVIOUSKPID sy-vline 
WA_SYB_XCHG_ENGINE_STR-CPUTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-SYSTEMCPUTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-USERCPUTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-IOCPUTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-IDLECPUTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-YIELDS sy-vline 
WA_SYB_XCHG_ENGINE_STR-CONNECTIONS sy-vline 
WA_SYB_XCHG_ENGINE_STR-DISKIOCHECKS sy-vline 
WA_SYB_XCHG_ENGINE_STR-DISKIOPOLLED sy-vline 
WA_SYB_XCHG_ENGINE_STR-DISKIOCOMPLETED sy-vline 
WA_SYB_XCHG_ENGINE_STR-MAXOUTSTANDINGIOS sy-vline 
WA_SYB_XCHG_ENGINE_STR-PROCESSESAFFINITIED sy-vline 
WA_SYB_XCHG_ENGINE_STR-CONTEXTSWITCHES sy-vline 
WA_SYB_XCHG_ENGINE_STR-HKGCMAXQSIZE sy-vline 
WA_SYB_XCHG_ENGINE_STR-HKGCPENDINGITEMS sy-vline 
WA_SYB_XCHG_ENGINE_STR-HKGCHWMITEMS sy-vline 
WA_SYB_XCHG_ENGINE_STR-HKGCOVERFLOWS sy-vline 
WA_SYB_XCHG_ENGINE_STR-STATUS sy-vline 
WA_SYB_XCHG_ENGINE_STR-STARTTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-STOPTIME sy-vline 
WA_SYB_XCHG_ENGINE_STR-AFFINITIEDTOCPU sy-vline 
WA_SYB_XCHG_ENGINE_STR-OSPID sy-vline      INTO ld_text SEPARATED BY SPACE.

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