How to extract sql text with SID and SERIAL#

Question

Hi,
I am new to oracle database and recently i have started my journey in performance tuning.
i need to extract sql text which is fired by user based ont SID and SERIAL#.
Thanks in advance..
prabha

Answer 1

seankim wrote:
Hi~
select a.sid, a.serial#, b.sql_fulltext
from   v$session a, v$sql b
where  decode(a.sql_id,null,a.prev_sql_id, a.sql_id)=b.sql_id
and    decode(a.sql_id,null,a.prev_child_number, a.sql_child_number)=b.child_number
and    a.sid=&sid
and    a.serial#=&serial;
Also a bad idea - have you checked the exection plan ?
Do you think it might be a good idea to think about the need for statistics on fixed objects ?
Here's a possible plan from 11.1.0.7 - and it's not very nice.
| Id  | Operation                  | Name              | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT           |                   |     1 |  2182 |     0   (0)| 00:00:01 |
|   1 |  NESTED LOOPS              |                   |     1 |  2182 |     0   (0)| 00:00:01 |
|   2 |   MERGE JOIN CARTESIAN     |                   |     1 |  2075 |     0   (0)| 00:00:01 |
|   3 |    NESTED LOOPS            |                   |     1 |    39 |     0   (0)| 00:00:01 |
|*  4 |     FIXED TABLE FIXED INDEX| X$KSLWT (ind:1)   |     1 |    26 |     0   (0)| 00:00:01 |
|*  5 |     FIXED TABLE FIXED INDEX| X$KSLED (ind:2)   |     1 |    13 |     0   (0)| 00:00:01 |
|   6 |    BUFFER SORT             |                   |     1 |  2036 |     0   (0)| 00:00:01 |
|*  7 |     FIXED TABLE FULL       | X$KGLCURSOR_CHILD |     1 |  2036 |     0   (0)| 00:00:01 |
|*  8 |   FIXED TABLE FIXED INDEX  | X$KSUSE (ind:1)   |     1 |   107 |     0   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   4 - filter("W"."KSLWTSID"=82)
   5 - filter("W"."KSLWTEVT"="E"."INDX")
   7 - filter("INST_ID"=USERENV('INSTANCE'))
   8 - filter("S"."INDX"=82 AND "S"."KSUSESER"=53 AND "S"."INST_ID"=USERENV('INSTANCE')
              AND BITAND("S"."KSSPAFLG",1)<>0 AND BITAND("S"."KSUSEFLG",1)<>0 AND
              "KGLOBT03"=DECODE("S"."KSUSESQI",NULL,"S"."KSUSEPSI","S"."KSUSESQI") AND
              "KGLOBT09"=DECODE("S"."KSUSESQI",NULL,DECODE("S"."KSUSEPCH",65535,TO_NUMBER(NULL),"S"."K
              SUSEPCH"),DECODE("S"."KSUSESCH",65535,TO_NUMBER(NULL),"S"."KSUSESCH")))You need to avoid the "full tablescan" of the library cache.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com