ABAP Select data from SAP table SDB_IOTHREADSTATISTICS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SDB_IOTHREADSTATISTICS 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_IOTHREADSTATISTICS. 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_IOTHREADSTATISTICS 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_IOTHREADSTATISTICS TYPE STANDARD TABLE OF SDB_IOTHREADSTATISTICS,
      WA_SDB_IOTHREADSTATISTICS TYPE SDB_IOTHREADSTATISTICS,
      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_IOTHREADSTATISTICS> TYPE SDB_IOTHREADSTATISTICS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SDB_IOTHREADSTATISTICS
*  INTO TABLE @DATA(IT_SDB_IOTHREADSTATISTICS2).
*--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_IOTHREADSTATISTICS INDEX 1 INTO DATA(WA_SDB_IOTHREADSTATISTICS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SDB_IOTHREADSTATISTICS>-VOLUMEID = 1.
<SDB_IOTHREADSTATISTICS>-PARTITIONID = 1.
<SDB_IOTHREADSTATISTICS>-TENANT = 1.
<SDB_IOTHREADSTATISTICS>-QUEUEID = 1.
<SDB_IOTHREADSTATISTICS>-VOLUMETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SDB_IOTHREADSTATISTICS-READCNT, sy-vline,
  WA_SDB_IOTHREADSTATISTICS-READPGCNT, sy-vline,
  WA_SDB_IOTHREADSTATISTICS-READTIME, sy-vline,
  WA_SDB_IOTHREADSTATISTICS-READTIMEMESCNT, sy-vline,
  WA_SDB_IOTHREADSTATISTICS-WRITECNT, sy-vline,
  WA_SDB_IOTHREADSTATISTICS-WRITEPGCNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SDB_IOTHREADSTATISTICS 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_IOTHREADSTATISTICS 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_IOTHREADSTATISTICS INTO WA_SDB_IOTHREADSTATISTICS.


*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_IOTHREADSTATISTICS_STR, 
VOLUMEID TYPE STRING,
PARTITIONID TYPE STRING,
TENANT TYPE STRING,
QUEUEID TYPE STRING,
VOLUMETYPE TYPE STRING,
READCNT TYPE STRING,
READPGCNT TYPE STRING,
READTIME TYPE STRING,
READTIMEMESCNT TYPE STRING,
WRITECNT TYPE STRING,
WRITEPGCNT TYPE STRING,
WRITETIME TYPE STRING,
WRITETIMEMESCNT TYPE STRING,
PENDINGIOCNT TYPE STRING,
MAXPENDINGIOCNT TYPE STRING,
QUEUEPRIORITY TYPE STRING,
LOADAVG TYPE STRING,
PATH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SDB_IOTHREADSTATISTICS_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_IOTHREADSTATISTICS_STR-VOLUMEID sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-PARTITIONID sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-TENANT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-QUEUEID sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-VOLUMETYPE sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-READCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-READPGCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-READTIME sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-READTIMEMESCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-WRITECNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-WRITEPGCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-WRITETIME sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-WRITETIMEMESCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-PENDINGIOCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-MAXPENDINGIOCNT sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-QUEUEPRIORITY sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-LOADAVG sy-vline 
WA_SDB_IOTHREADSTATISTICS_STR-PATH sy-vline      INTO ld_text SEPARATED BY SPACE.

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