How can I know which queries run in the TEMP tbs (Oracle 9i and 10g) ?

Question

Dear friends, do you have a query which can shows which statements are running currenly in the TEMP tablespace?
Many Thanks in advance, Marcelo.

Answer 1

Marcelo,
you can check DBMS_XPLAN.DISPLAY_CURSOR - if you find a column TempSpc there, it's using Temp space.
select source from sys.source$ order by source;
select * from table(dbms_xplan.display_cursor(NULL, NULL, NULL));
PLAN_TABLE_OUTPUT
SQL_ID  5ywbw0z6gupwk, child number 0
select source from sys.source$ where rownum < 555555 order by source
Plan hash value: 1381731087
| Id  | Operation           | Name    | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT    |         |       |       |       | 11492 (100)|          |
|   1 |  SORT ORDER BY      |         |   555K|    37M|    87M| 11492   (1)| 00:02:18 |
|*  2 |   COUNT STOPKEY     |         |       |       |       |            |          |
|   3 |    TABLE ACCESS FULL| SOURCE$ |   572K|    38M|       |  1834   (1)| 00:00:23 |
---------------------------------------------------------------------------------------or for all your statements currently available:
SELECT t2.*
FROM v$sql s, table(DBMS_XPLAN.DISPLAY_CURSOR(s.sql_id, s.child_number)) t ,
     table(DBMS_XPLAN.DISPLAY_CURSOR(s.sql_id, s.child_number)) t2
WHERE t.PLAN_TABLE_OUTPUT like '%TempSpc%';Edit: Sorry, I didn't see you are also asking for 9i. DISPLAY_CURSOR is only available in 10g+ - but Tom Kyte and others have shown WorkArounds to use DBMS_XPLAN.DISPLAY from 9i to show the information for all available SQLs.
2nd Edit:
TempSpc only shows the estimation the optimizer makes.
You can check V$SQL_PLAN_STATISTICS_ALL for the columns max_tempseg_size and tempseg_size. In Addition please have also a look on [http://antognini.ch/about/] Blog [http://antognini.ch/2009/05/wrong-information-about-temporary-space-usage/] .
I used:
select PARENT_ID, ID, DEPTH, POSITION,
       MAX_TEMPSEG_SIZE, LAST_TEMPSEG_SIZE
from v$SQL_PLAN_STATISTICS_ALL
where MAX_TEMPSEG_SIZE > 0;hth,
Martin
Edited by: berx on Jun 17, 2009 4:11 AM
Edited by: berx on Jun 17, 2009 6:18 AM