ABAP Select data from SAP table TST04OMS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TST04OMS 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 TST04OMS. 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 TST04OMS 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_TST04OMS TYPE STANDARD TABLE OF TST04OMS,
      WA_TST04OMS TYPE TST04OMS,
      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: <TST04OMS> TYPE TST04OMS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TST04OMS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TST04OMS
  INTO TABLE IT_TST04OMS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TST04OMS
*  INTO TABLE @DATA(IT_TST04OMS2).
*--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_TST04OMS INDEX 1 INTO DATA(WA_TST04OMS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TST04OMS ASSIGNING <TST04OMS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TST04OMS>-CACHESIZE = 1.
<TST04OMS>-CACHEACC = 1.
<TST04OMS>-CACHEHITS = 1.
<TST04OMS>-HITRATE = 1.
<TST04OMS>-SQLCOMM = 1.

ENDLOOP.

LOOP AT IT_TST04OMS INTO WA_TST04OMS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TST04OMS-ROLLBACKS, sy-vline,
  WA_TST04OMS-COMMITS, sy-vline,
  WA_TST04OMS-PREPARES, sy-vline,
  WA_TST04OMS-EXECUTES, sy-vline,
  WA_TST04OMS-CREATES, sy-vline,
  WA_TST04OMS-DBPROCS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TST04OMS 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_TST04OMS 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_TST04OMS INTO WA_TST04OMS.


*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_TST04OMS_STR, 
CACHESIZE TYPE STRING,
CACHEACC TYPE STRING,
CACHEHITS TYPE STRING,
HITRATE TYPE STRING,
SQLCOMM TYPE STRING,
ROLLBACKS TYPE STRING,
COMMITS TYPE STRING,
PREPARES TYPE STRING,
EXECUTES TYPE STRING,
CREATES TYPE STRING,
DBPROCS TYPE STRING,
ALTERS TYPE STRING,
DROPS TYPE STRING,
SHOWS TYPE STRING,
PHYREADS TYPE STRING,
PHYWRITES TYPE STRING,
LOGREADS TYPE STRING,
LOGWRITES TYPE STRING,
LOCKENTRY TYPE STRING,
MAXENTRIES TYPE STRING,
AVGENTRIES TYPE STRING,
ROWENTRIES TYPE STRING,
TABENTRIES TYPE STRING,
COLLISION TYPE STRING,
ESCALATION TYPE STRING,
LOCKHOLDER TYPE STRING,
LOCKREQ TYPE STRING,
LOGPAGES TYPE STRING,
LOGWAITS TYPE STRING,
GROUPCOM TYPE STRING,
QUEUEOVER TYPE STRING,
TABLESCANS TYPE STRING,
INDEXSCANS TYPE STRING,
CACHESORTS TYPE STRING,
ROWSORTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TST04OMS_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_TST04OMS_STR-CACHESIZE sy-vline 
WA_TST04OMS_STR-CACHEACC sy-vline 
WA_TST04OMS_STR-CACHEHITS sy-vline 
WA_TST04OMS_STR-HITRATE sy-vline 
WA_TST04OMS_STR-SQLCOMM sy-vline 
WA_TST04OMS_STR-ROLLBACKS sy-vline 
WA_TST04OMS_STR-COMMITS sy-vline 
WA_TST04OMS_STR-PREPARES sy-vline 
WA_TST04OMS_STR-EXECUTES sy-vline 
WA_TST04OMS_STR-CREATES sy-vline 
WA_TST04OMS_STR-DBPROCS sy-vline 
WA_TST04OMS_STR-ALTERS sy-vline 
WA_TST04OMS_STR-DROPS sy-vline 
WA_TST04OMS_STR-SHOWS sy-vline 
WA_TST04OMS_STR-PHYREADS sy-vline 
WA_TST04OMS_STR-PHYWRITES sy-vline 
WA_TST04OMS_STR-LOGREADS sy-vline 
WA_TST04OMS_STR-LOGWRITES sy-vline 
WA_TST04OMS_STR-LOCKENTRY sy-vline 
WA_TST04OMS_STR-MAXENTRIES sy-vline 
WA_TST04OMS_STR-AVGENTRIES sy-vline 
WA_TST04OMS_STR-ROWENTRIES sy-vline 
WA_TST04OMS_STR-TABENTRIES sy-vline 
WA_TST04OMS_STR-COLLISION sy-vline 
WA_TST04OMS_STR-ESCALATION sy-vline 
WA_TST04OMS_STR-LOCKHOLDER sy-vline 
WA_TST04OMS_STR-LOCKREQ sy-vline 
WA_TST04OMS_STR-LOGPAGES sy-vline 
WA_TST04OMS_STR-LOGWAITS sy-vline 
WA_TST04OMS_STR-GROUPCOM sy-vline 
WA_TST04OMS_STR-QUEUEOVER sy-vline 
WA_TST04OMS_STR-TABLESCANS sy-vline 
WA_TST04OMS_STR-INDEXSCANS sy-vline 
WA_TST04OMS_STR-CACHESORTS sy-vline 
WA_TST04OMS_STR-ROWSORTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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