Dbms_session.set_sql_trace(true);

Hi experts,
Will you please tell me when a devloper writes
dbms_session.set_sql_trace(true);
In his pl/sql code.What is his exact intention behind it.
Regards
Rajat

http://www.oracle.com/pls/db111/search?remark=quick_search&word=sql+trace&partno=

Similar Messages

Dbms_session.set_sql_trace(true) in PL/SQL Code to trace execution

Hi,
I'm working on some legacy PL/SQL Code with the objective of tuning. I added the following to the PL/SQL Body so that I can trace the execution and identify low-hanging-fruit that can be tuned.
I added the following after the BEGIN section of the PL/SQL body:
trace_process_flow_info_sp( this procedure captures the parameters passed into the procedure of the package body);
execute immediate 'alter session set events '||''''||'10046 trace name context forever, level 12'||'''';
dbms_session.set_sql_trace(true);
My objective is to capture the execution of the code, capture the bind variable values, however I am not seeing the bind values in either tkprof or the Trace Analyzer.
Any Ideas on how to see the Bind Variable Values?
Thanks

Level 0 means no binds.Are you sure that this level is available?
According to note 115675.1 there are only four
possible levels (1,4,8,12)Hmmm it seems you are right.
SQL> conn xxx/xxx@xxx
Connected.
SQL> ed
Wrote file afiedt.buf
1* alter session set events '10046 trace name context forever, level 0'
SQL> /
ERROR:
ORA-02194: event specification syntax error 231 (minor error 283) near '0'
SQL> ed
Wrote file afiedt.buf
1* alter session set events '10046 trace name context forever, level 1'
SQL> /
Session altered.
SQL> The same results for 9.2.0.7.0 and 10.2.0.1.0
So OK a correction dbms_session.set_sql_trace(true) means level 1, but anyway it means no binds.
Thank you for your correction, should go and update my article!
Gints Plivna
http://www.gplivna.eu

Web application sql trace ?

Hello all,
If i want to run a database trace for designer pl/sql web application would i follow the same steps that are executed when running sql trace from sqlplus that is dbms_session.set_sql_trace(true) DBMS_SESSION.SET_IDENTIFIER ?

Yes, that's right, there is no special consideration when from this perspective if the session is started from web or from another client.
You should consider you should properly identify the session when it logs in the db.
~ Madrid

Trace all selects, updates, and deletes

I have a compiled application that is making calls to an Oracle database (8.1.7). I don't have access to the source code for the program, so I'd like to trace all SELECT, UDPATE, and DELETE statements that it makes... something in the application is crashing because of bad data and I'd like to figure out what it is.
Is there something I can add to the init.ora file to turn on tracing for all sessions? Thanks!
--Frank

In the init<SID>.ora file, set SQL_TRACE to TRUE, TIMED_STATISTICS to FALSE, MAX_DUMP_FILE_SIZE to 500 and USER_DUMP_DEST to the directory where you want to store the trace files.
You can also proceed like this:
create or replace trigger trg$trace
after logon on database
begin
DBMS_SESSION.SET_SQL_TRACE (TRUE);
end trg$trace;
I have a compiled application that is making calls to an Oracle database (8.1.7). I don't have access to the source code for the program, so I'd like to trace all SELECT, UDPATE, and DELETE statements that it makes... something in the application is crashing because of bad data and I'd like to figure out what it is.
Is there something I can add to the init.ora file to turn on tracing for all sessions? Thanks!
--Frank

LOGON ON TRIGGER를 이용한 접속제한 | TRACE 설정

제품 : ORACLE SERVER
작성날짜 : 2003-12-03
LOGON ON TRIGGER를 이용한 접속제한 | TRACE 설정
===============================================
PURPOSE
데이터베이스에 접속하는 IP, USERNAME으로 접속을 제한하거나, TRACE를 설정하는 방법에
대하여 알아본다.
Explanation
DB를 접속하는 사용자를 USER/ROLE로 구분하여 관리하는 Accecs Policy 라면 관계 없지만
하나의 USER/PASSWORD로 Application을 이용하는 경우에는 Application을 통해서만
DB에 접속하도록 통제하는 것이 불가능하게 된다.
즉 일부 사용자가 PC에 설치된 SQL*Net을 통하여 SQL*Plus나 3rd party TOOL로 DB에 접속하여
데이터의 열람/조작을 한다면 이를 방지하거나 추적하기가 어렵다.
아래 예제는 DB server로의 TELNET접속을 통한 특정 DB User(SCOTT)의 접속을 원천적으로 막고,
특정 IP(152.69.41.232)로부터 접속하는 Session에 trace를 설정하는 예제이다.
REM ------------------------------------------------------------------------
REM DISCLAIMER:
REM This script is provided for educational purposes only. It is NOT
REM supported by Oracle World Wide Technical Support.
REM The script has been tested and appears to work as intended.
REM You should always run new scripts on a test instance initially.
REM ------------------------------------------------------------------------
REM Main text of script follows:
-- Use an error number in the range of -20000 to -20999 --
CREATE OR REPLACE TRIGGER SCOTT_LOGON_TRACE
AFTER LOGON ON SCOTT.SCHEMA
BEGIN
-- LOCAL=YES로 접속 못 하도록 설정 --
IF ( ORA_CLIENT_IP_ADDRESS IS NULL ) THEN
RAISE_APPLICATION_ERROR ( -20001
, 'Local connection as SCOTT is not allowed!'
-- LOOPBACK으로 접속 못 하도록 설정(DB server IP:152.69.41.21) --
ELSIF ( ORA_CLIENT_IP_ADDRESS = '152.69.41.21' ) THEN
RAISE_APPLICATION_ERROR ( -20002
, 'IP '
|| ORA_CLIENT_IP_ADDRESS
|| ' is not allowed to connect database as SCOTT!'
-- 특정 IP에 대하여 TRACE 설정 --
ELSIF ( ORA_CLIENT_IP_ADDRESS = '152.69.41.232' ) THEN
SYS.DBMS_SESSION.SET_SQL_TRACE(TRUE);
END IF;
END;
----------- cut ---------------------- cut -------------- cut --------------
Example
sqlplus /nolog
SQL*Plus: Release 8.1.7.0.0 - Production on Wed Nov 6 17:16:57 2002
(c) Copyright 2000 Oracle Corporation. All rights reserved.
SQL> conn scott/tiger
ERROR:
ORA-00604: error occurred at recursive SQL level 1
ORA-20001: Local connection as SCOTT is not allowed!
ORA-06512: at line 3
SQL> conn scott/tiger@kyulee
ERROR:
ORA-00604: error occurred at recursive SQL level 1
ORA-20002: IP 152.69.41.21 is not allowed to connect database as SCOTT!
ORA-06512: at line 7
SQL> conn system/manager
Connected.
Reference Documents
1.
<Note:178924.1>
http://metalink.oracle.com/metalink/plsql/ml2_documents.showNot?p_id=178924.1&p_font=
2.
Bulletin No: 11848
Product: ORACLE_SERVER
Subject: ORACLE 8I SYSTEM EVENT TRIGGER ( ORACLE 8.1.6 )

JDBC & sql_trace

Hello,
is anyone aware that a "ALTER SESSION SET SQL_TRACE = TRUE" (or dbms_session.set_sql_trace(TRUE)) does not work through JDBC?
When I issue the above statement in SQL*Plus the trace files will be generated. When I do the same from a JDBC based query tool (same Oracle user), no trace files are generated.
Is there any additional property I need to specify during the JDBC (thin driver) connection?
What am I missing?
Regards
Thomas

Try looking in the background_dump_dest directory. Something to do with connection pooling I believe.

Trace a session that runs as a batch

Hi, I am trying to identify the SQL which is causing an error in a batch program I am running. I am unable to bounce the database as its production, is it possible to enable trace without shutting down the database, and for a session that does not yet exist - it only exists when I start the program.
thanks

Well I managed to enable tracing using the logon trigger for the user that runs the batch program.
This is the trigger I used.
CREATE OR REPLACE TRIGGER user01_logon
AFTER LOGON ON user01.SCHEMA
BEGIN
dbms_session.set_sql_trace (TRUE);
END;
CREATE OR REPLACE TRIGGER user01_logoff
BEFORE LOGOFF ON user01.SCHEMA
BEGIN
dbms_session.set_sql_trace (FALSE);
END;
This generated the SQL in the trace file. But the error is to do with a bind variable - is there a way to identify the value of the bind variable is the trace file?

CLIENT 에서 SQL TRACE 뜨기

제품 : ORACLE SERVER
작성날짜 : 2002-05-07
PURPOSE
Client에서 SQL trace를 뜨는 방법
EXPLANATION
오라클을 사용하는 tool 에서 sql trace 를 사용하고자 하면
alter session set sql_trace=true ; 를 사용한다.
또는 dbms_session.set_sql_trace (true) 사용한다.
이는 forms 를 비롯하여 precompiler 를 포함한다.
또 이의 반대는
alter session set sql_trace= false ; 를 사용한다.
또는 dbms_session.set_sql_trace (false) 사용한다.
이 때 실행된 결과는 user_dump_dest 에 쌓이는데 , file 이름은 process 번호를
참고한다.
그러나 MTS 의 경우 trace file 의 구분이 모호해지므로 client를 connect 시
dedicate 로 붙여 trace 를 사용하여야 하며, 만일 다른 session 에서 다른
session의 것을 trace 뜨고 싶으면,
dbms_system.set_sql_trace_in_session 을 사용할 수 있다.
EXAMPLE
이의 사용법은 다음과 같다.
1. Setup
catproc.sql 에서 생성되는 package 와는 달리 dbms_system 의
public synonym 은 생성되지 않고 권한도 부여되지 않는다.
DB 생성 초기에 SYS user 만 reference 할 수 있으므로 이 package 를
사용할 user에게 권한을 부여한다.
예제 : GRANT EXECUTE ON DBMS_SYSTEM to username;
2. v$session 으로부터 SID 와 serial 번호를 부여한다.
SQL> select sid, serial#, osuser, username
2> from v$session;
SID SERIAL# OSUSER USERNAME
7 66 <osLogin> <oracleUserName>
3. 원하는 session 에서 SQL trace 를 setting 한다.
exec sys.dbms_system.set_sql_trace_in_session
(12,16631,TRUE);
또는 pl/sql procedure 에서:
begin
sys.dbms_session.set_sql_trace ((<sid>,<serial>,TRUE);
end
4. session 에서 SQL Trace 를 끝마친다. 이 결과는 user_dump_dest에
쌓인다.
exec sys.dbms_system.set_sql_trace_in_session
(<sid>,<serial>,FALSE);
또는 pl/sql procedure 에서
begin
sys.dbms_session.set_sql_trace (<sid>,<serial>,FALSE);
end
만일 os user 가 khpark 인 client 에서 실행하는 sql 의 trace 를 뜨고
싶으면
svrmgrl> select sid,serial#,osuser from v$session
where osuser='KHPARK';
sid serial# osuser
=================================================
8 12 khpark
svrmgr>execute dbms_system.set_sql_trace_in_session (8,12,TRUE);
이렇게 하면 udump 에 trace file 이 생기므로 이를 이용하여 tkprof 를 수행한다.
REFERENCE DOCUMENT
---------------------

Hello Carl,
SQL Trace and SQL Profiler are deprecated since SQL Server 2012 which means that at any future version it might not be available anymore. Have you considered using Extended Events - Microsoft.SqlServer.Management.XEvent
Namespace?
Ivan Donev MCT and MCSE Data Platform
I've spent a fair bit of time reading about XEvents - eventually I won't need SQL 2008 support anymore and I can stop using Trace - but I'm not seeing anything remotely close to TraceServer. What I see is an elaborate infrastructure for efficiently
collecting information about high volume OLTP workloads with minimal server impact. That's all well and good, but of no use to me at all. What I'm looking for is real-time information about OLAP database processing that I can embed in my app to
provide detailed metrics on same.
Presumably something can be put together using XEvents as the source and ETW as the target, with real-time monitoring of ETW events, but that's a lot of API to get a handle on, and I haven't seen any helpful samples that show putting it all together to get
a profiler-like experience with live viewing of processing events as they happen.
Any pointers to helpful samples/resources on XEvents are appreciated - long term, that's going to be my path, I'm sure.
-cd Mark the best replies as answers!

How to trace an application in Oracle 10g

Hi,
I want to trace a complete application in Oracle 10g end-to-end.
Here is the scenario,
The are two systems:
System A: Oracle 10g server
System B: Windows server
The application runs on system B.
How do I trace the complete application in oracle 10g?
I read about the trcsess tool but will like to know if there is a way to collate all *.trc produced by the application.
Thanks in advance!
-Thanks
Karthik

Tracing the Oracle transactions is easy, but you need to decide what level of trace you want and identify the database sessions to trace.
Tracing can generate huge amounts of logs, so think carefully if you really need to do this.
The tracing will only capture the database transactions. It won't track what happens in the application (e.g mouse clicks etc)
Options to enable tracing :-
-- ALTER SESSION
alter session set tracefile_identifier = 'robert_trace'; # so that the trace files from this session are easily identified
alter session set events '10046 trace name context forever, level 8';
-- ALTER SYSTEM
alter system set sql_trace=true;
-- DBMS_SESSION
exec dbms_session.set_sql_trace(sql_trace => TRUE);
-- DBMS_SUPPORT
exec dbms_support.start_trace(waits=>TRUE, binds=>FALSE);
-- DBMS_SYSTEM
exec sys.dbms_system.set_ev(72,21237,10046,12,'');
-- ORADEBUG
select username, spid from v$process;
ORADEBUG SETOSPID 21237
ORADEBUG EVENT 10046 TRACE NAME CONTEXT FOREVER, LEVEL 12
-- DBMS_MONITOR
exec dbms_monitor.session_trace_enable(session_id=>75, serial_num=>21237);

SQL Trace for schema level

Hi
Database 10.1.0.4
Sql trace file which I have used but didn't get the trace file. I have tried to get per session Id but not able to get the trace file, when ever user logged into application, virtually 6 user get lgged in and you never know about user. So I have desided to capture for schema
I have used this for tracing
SQL> ALTER SESSION SET sql_trace=TRUE;
SQL> ALTER SESSION SET sql_trace=FALSE;
Or
SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => TRUE);
SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => FALSE);
or
SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>TRUE);
SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>FALSE);
I want to get trace file for schema, can anyone suggest how do I get trace file at schema level.
Thanks for help

Hi,
Using instance-level tracing by setting the init.ora/spfile... parameter SQL_TRACE=TRUE, all processes against the instance will create their own trace files. This particular method of tracing should be used with care since it creates a great deal of overhead against the system. In addition, the default value for this parameter is FALSE.
Cheers
Legatti

SQL Logging for a specific session or table

Hi!
Don't know if this is the right place to ask, so sorry if it's wrong.
Is there any possibility to log all SQL activity which a specific session id is producing.
Using the Instance Manager I can only see the Latest SQL statement but no history.
Please help my poor soul...
Thanks in advance
Greets, Hansi

Hi Joel and everyone,
Thanks for your information.
But I like to say that, I wanted to store the text of these SQL TRACE files which belongs to different session, into my table SQL_TRACE (session_id, username, text).
As you said that we can use DBMS_SESSION.SET_SQL_TRACE (sql_trace True);
to enable the tracing of particular session.
I know TKPROF is the utility via which we can read these sql trace files.
For Example:
C:\ tkprof c:\SQL_TRACE\ora012929.trc c:\SQL_text\oratext.txt
With regards to this, how should we read the trace files for the users who logon to the database using the feature of logon trigger and then store the text of these sqltrace files of different users into the table SQL_TRACE (session_id, username, text).
I wanted to use my table for getting sqltrace info for Historical purpose.
It is my requirement.
Could you please give your suggestion about it?
Thanks
Jaffery.

How can I enable trace log in Oracle Database 10g ( in RedHat Linux)

Dear Forums Members,
Could u plz drop a message about how can I enable $Oracle_Home/network/trace
in Oracle Database 10g (Operating system is RedHat Linux Advanced Server 3).
I will very greatful if someone reply my message.
Thanks
Aungshu

To enable Tracing for a session Level.
ALTER SESSION SET TRACEFILE_IDENTIFIER = 'my_trace_id';
Enable the SQL Trace facility for the session by using one of the following:
SQL> Exec DBMS_SESSION.SET_SQL_TRACE
or
SQL> ALTER SESSION SET SQL_TRACE = TRUE;
To disable the SQL Trace facility for the session, enter:
ALTER SESSION SET SQL_TRACE = FALSE;
To enable Tracing for a database level.
Edit init parameter SQL_TRACE = TRUE.
Its not recomended because running the SQL Trace facility increases system overhead, enable it only when tuning SQL statements, and disable it when you are finished

Disabling oracle trace in udump

Is there a way to disable this udump trace files?. I am using oracle 10g and i have set the following in init.ora
sql_trace=false
trace_enabled=false
oracle_trace_enable=FALSE
But still for every connection and query, trace file is getting generated

Maybe it's not instance level setting.. Consider following example:
SQL> SHOW PARAMETER trace
NAME                                 TYPE        VALUE
log_archive_trace                    integer     0
sec_protocol_error_trace_action      string      TRACE
sql_trace                            boolean     FALSE
trace_enabled                        boolean     FALSE
tracefile_identifier                 string
SQL> SELECT spid FROM v$process p, v$session s
2   WHERE s.paddr = p.addr
3   AND s.sid = (SELECt sid FROM v$mystat WHERE rownum = 1);
SPID
19935Then I'm checking if my session generates trace files:
[oracle@OEL5 trace]$ ls -la *19935*
ls: *19935*: No such file or directoryNothing.
SQL> exec dbms_session.session_trace_enable(TRUE, TRUE);
Procedura PL/SQL zosta│a zako˝czona pomyťlnie.
SQL> SELECT sysdate FROM dual;
SYSDATE
09/07/14
SQL>
[oracle@OEL5 trace]$ ls -la *19935*
-rw-r----- 1 oracle oinstall 2777 Jul 14 17:13 ORA111_ora_19935.trc
-rw-r----- 1 oracle oinstall 127 Jul 14 17:13 ORA111_ora_19935.trm
[oracle@OEL5 trace]$

Possible Corruption in old Oracle 9i table - Fixed problem with WinXP Mode

EDIT: This was not a corruption in my database. It was a communication problem between Windows 7 (where my app runs) and Windows XP Mode (where my Oracle 9i database runs). Skip to the bottom of page 2 to see the solution I found.
I have an old program that I use constantly. It connects to an Oracle 9i database (version 9.2.0.5). Within the past month, one of the processes has slowed to a crawl. This process saves an Excel file to an Oracle table. The files are no larger than 6MB. The field that holds the spreadsheet is a LONG RAW data type. I cannot figure out why the process is taking to long now. It takes up to an hour to save the file to the table. The code has not changed. Here's what I've tried so far. I'm not an Oracle DBA.
1. Tried running VALIDATE STRUCTURE on table and all indexes. No corruption found.
2. Tried truncating the table to remove all existing data. No change.
3. Tried running DBMS_REPAIR on table. No corruption found.
4. Tried running DB_VERIFY on all data files. No corruption found.
5. Tried dropping and recreating the table with no data in it. No change.
I'm not sure that this is a corruption problem, but I can't think of what else has changed. Nothing has happened recently that should have caused this.
What else can I look for?
Thank you for your help.
EDIT: Changed title to help other people using Oracle in WinXP Mode find this solution.

JavaUser wrote:
I figured out how to turn on tracing for my Java program at the point where it is taking a very long time. The trace shows that it takes 205.66 second to execute my INSERT statement. Here is the trace output translated by TKProf for this INSERT statement:
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      2.18     205.66          0         75        508           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      2.18     205.66          0         75        508           1
Misses in library cache during parse: 0
Optimizer goal: CHOOSEI'm seeing how long the query is taking, but I'm not seeing why. What else should I be looking for?
Thanks for your help!
Edited by: JavaUser on Apr 18, 2012 2:32 PMtwo different ways below
DBMS_SESSION.SESSION_TRACE_ENABLE(TRUE,TRUE,'ALL_EXECUTIONS');
alter session set events '10046 trace name context forever, level 12';
-- invoke the SQL code
DBMS_SESSION.SESSION_TRACE_ENABLE(FALSE,FALSE,NULL);
DBMS_MONITOR.SESSION_TRACE_ENABLE(
    session_id   IN BINARY_INTEGER DEFAULT NULL,
    serial_num   IN BINARY_INTEGER DEFAULT NULL,
    waits        IN BOOLEAN DEFAULT TRUE,
    binds        IN BOOLEAN DEFAULT FALSE,
    plan_stat    IN VARCHAR2 DEFAULT NULL);

Create Materialized View hangs

Hi,
I have a query, which contains about 10 tables and returns about 40000 rows. When I execute the query itself it runs about 1minute.
I want to create a Materialized View for that query, but I had to stop it after some hours. There is no error message, it just doesn't stop.
Do you have any ideas what the problem could be or where I should start to look at?
Thank you very much for your help!
DROP MATERIALIZED VIEW A;
CREATE MATERIALIZED VIEW A
TABLESPACE A_T
PCTUSED    0
PCTFREE    10
INITRANS   2
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            NEXT             1M
            MINEXTENTS       1
            MAXEXTENTS       UNLIMITED
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
NOCACHE
NOLOGGING
NOCOMPRESS
NOPARALLEL
BUILD IMMEDIATE
REFRESH COMPLETE ON DEMAND
WITH PRIMARY KEY
--ENABLE QUERY REWRITE
AS
SELECT...

890408 wrote:
It returns all rows after 1 minute. I don't have any DB links btw. and I am using oracle 11g.
We had the same problem with another oracle installation (10g) with another query.
When I watch the session in my TOAD Session Browser I see the event "asynch descriptor resize" in wait, could this be a hint?
Or can I enable somehow tracing to find out why the mat view creation never ends?tracing is enabled by below
DBMS_SESSION.SESSION_TRACE_ENABLE(TRUE,TRUE,'ALL_EXECUTIONS');

Dbms_session.set_sql_trace(true);

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