Explain plan not displayed in sql trace file

Hello,
I don't understand why in sql trace file, after tkprof transformation, for several queries the explain plan is displayed and for several queries, no explain plan is displayed.
How can I have the explain plan for all queries?
Thanks for your help.

Was this a trace started on an already running task? Was the trace stopped before the task completed? Did the trace file reach its set size limit before the task compled?
In all three cases above you would have cursors that were not closed and stats information not written to the trace file resulting in incomplete data for some SQL.
HTH -- Mark D Powell --

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Explain plan not available in dba studio

Hi, guys,
Why the explain plan not available in my dba studio with a message like this "explain plan not available for this sql statement. ora-02195: attempt to create permanent object in a temporary tablespace"
Another question: I can use "set autotrace on" to trace sql statement in sql*plus window. But the final execution plan come up without those thing like cost, cardinality but only the steps
Thanks for your help
jim

Was this a trace started on an already running task? Was the trace stopped before the task completed? Did the trace file reach its set size limit before the task compled?
In all three cases above you would have cursors that were not closed and stats information not written to the trace file resulting in incomplete data for some SQL.
HTH -- Mark D Powell --

Why the content of the Explain Plan not show out?

Why the content of the Explain Plan not show out?
I am using Oracle 11g.
I already ran the utlxplan.sql sctipt and I also set serveroutput on.
SQL> set autotrace on
SQL> EXPLAIN PLAN FOR SELECT*FROM DEMO_TABLE WHERE OWNER='HR';
Explained.
Elapsed: 00:00:00.67

When you say:
My release 10.2 database display the Explain Plan automatically.
How to make 11.1.0.6 Oracle database to display the Explain Plan automatically.What do you mean? Specifically, what commands are you executing in the 10.2 database, that displays the execution plan "automatically"?
Are you saying that if you execute the same command in 11.1.0.6, you don't get a similar result? What happens? Do you get an error?
For both the 10.2 case and the 11.1.0.6 case, post the full output of the commands you're executing, and the result you are seeing.
Then, maybe someone can help you.
When you post the output, please encapsulate it in a pair "code" tags, which is the word "code" without the quotes, surrounded by a pair of curly braces {}.
When you do this correctly, the output looks like:
This is output from my execution plan run.and is much easier to read.
Don't be afraid to use the preview tab to see if your message will be posted with the correct formatting.
-Mark

Unable to generate SQL trace file on a 10.2.0.1.0 database

Hello,
I am unable to generate SQL trace files on a 10.2.0.1.0 database (OS is Win2003 server 64 bits).
First I tried the way I used to do it on older databases (8i and 9i) :
execute dbms_system.set_sql_trace_in_session(sid, serial#, true);
I got no error, but no file was created in the user dump dest directory.
Then I've been searching and I've tried other things :
- I changed the user_dump_dest parameter
- I changed the tracefiles_public parameter value to "true", by modifying the init.ora file
- I tried another package :
exec dbms_monitor.session_trace_enable(139)
Nothing worked, I can't create any trace file...
Does anyone have an idea about this issue ?
thank you for you help !
Antoine

Hello,
thank you all for replying.
I have 2 instances on this machine, and I've just realized that with the other one I have no problem to generate sql trace files as usual.
But why the hell is it impossible on the first instance ? What difference between the 2 instances can explain this ?
This is pretty weird...
Otherwise I am experiencing serious performance problems on the instance where I can't creat trace files, there must be something wrong with it, but I can't figure it out
regards,
Antoine

Sql trace file

hi,
when i am analyzing sql trace file it is showing like 1 sql statement in sql trace file, 1 user sql statements are traced
enabling sql_trace=true as a sys user only.
is there any problem it is not gathering all the users sql statements.

user8647245 wrote:
yes, your right,
Sort options: default
1 session in tracefile.
1 user sql statements in trace file
0 internal sql statements in trace file
1 sql statements in trace file
like this.
user1 and scott users are connected to database.SQL session can be traced at a time for only one user i.e. one session. It you enable sql trace, During this time if you run any SQL or programs, It will gather all trace of your queries.
Your output depends on Your input i.e. which transactions/queries you have executed.
For ex:
execute dbms_system.set_sql_trace_in_session(<sid>, <serial>, true);

Create sql trace files on client machine

Hi
oracle creates sql trace files on server side, what are possible and best ways of sharing those files with end users? is it possible to create them on client side instead?

Dbb wrote:
Hi
Hi
oracle creates sql trace files on server side,
Yes
what are possible and best ways of sharing those files with end users?
Using shared directory. Use the parameters dump to point to it
is it possible to create them on client side instead?
No
. :-) any help with my english is wellcome :-) .does this mean sharing user_dump destination at linux level and then mounting it from client machines ( win xp )?is there any doc on this?

Performance problem: Query explain plan changes in pl/sql vs. literal args

I have a complex query with 5+ table joins on large (million+ row) tables. In it's most simplified form, it's essentially
select * from largeTable large
join anotherLargeTable anothr on (anothr.id_2 = large.pk_id)
join...(other aux tables)
where large.pk_id between 123 and 456;
Its performance was excellent with literal arguments (1 sec per execution).
But, when I used pl/sql bind argument variables instead of 123 and 456 as literals, the explain plan changes drastically, and runs 10+ minutes.
Ex:
CREATE PROCEDURE runQuery(param1 INTEGER, param2 INTEGER){
CURSOR LT_CURSOR IS
select * from largeTable large
join anotherLargeTable anothr on (anothr.id_2 = large.pk_id)
join...(other aux tables)
where large.pk_id between param1 AND param2;
BEGIN
FOR aRecord IN LT_CURSOR
LOOP
(print timestamp...)
END LOOP;
END runQuery;
Rewriting the query 5 different ways was unfruitful. DB hints were also unfruitful in this particular case. LargeTable.pk_id was an indexed field as were all other join fields.
Solution:
Lacking other options, I wrote a literal query that concatenated the variable args. Open a cursor for the literal query.
Upside: It changed the explain plan to the only really fast option and performed at 1 second instead of 10mins.
Downside: Query not cached for future use. Perfectly fine for this query's purpose.
Other suggestions are welcome.

AmandaSoosai wrote:
I have a complex query with 5+ table joins on large (million+ row) tables. In it's most simplified form, it's essentially
select * from largeTable large
join anotherLargeTable anothr on (anothr.id_2 = large.pk_id)
join...(other aux tables)
where large.pk_id between 123 and 456;
Its performance was excellent with literal arguments (1 sec per execution).
But, when I used pl/sql bind argument variables instead of 123 and 456 as literals, the explain plan changes drastically, and runs 10+ minutes.
Ex:
CREATE PROCEDURE runQuery(param1 INTEGER, param2 INTEGER){
CURSOR LT_CURSOR IS
select * from largeTable large
join anotherLargeTable anothr on (anothr.id_2 = large.pk_id)
join...(other aux tables)
where large.pk_id between param1 AND param2;
BEGIN
FOR aRecord IN LT_CURSOR
LOOP
(print timestamp...)
END LOOP;
END runQuery;
Rewriting the query 5 different ways was unfruitful. DB hints were also unfruitful in this particular case. LargeTable.pk_id was an indexed field as were all other join fields.
Solution:
Lacking other options, I wrote a literal query that concatenated the variable args. Open a cursor for the literal query.
Upside: It changed the explain plan to the only really fast option and performed at 1 second instead of 10mins.
Downside: Query not cached for future use. Perfectly fine for this query's purpose.
Other suggestions are welcome.Best wild guess based on what you've posted is a bind variable mismatch (your column is declared as a NUMBER data type and your bind variable is declared as a VARCHAR for example). Unless you have histograms on the columns in question ... which, if you're using bind variables is usually a really bad idea.
A basic illustration of my guess
http://blogs.oracle.com/optimizer/entry/how_do_i_get_sql_executed_from_an_application_to_uses_the_same_execution_plan_i_get_from_sqlplus

Unable to Execute Explain Plan for the selected SQL

When working with several SQL statements in one SQL Worksheet you execute the specific statement by selecting it and pressing F9.
The same is not possible for the explain plan though.
If you select the first SQL statement and press F6, the explain plan is executed correctly. If you try the same for any other statement, all you get is 'No SQL statement entered.' on the status bar.
Maciej

It is available.
Type this in.
create table xx (yy number(10));
create table zz (aa number(10));
select * from xx;
select * from zz;Run all these statements by pressing f5.
Place the cursor on 'select * from xx;'.
Press f6 gives you a plan.
Place the cursor on 'select * from zz;'
press f6 gives you a different plan.
The problem seems to be that F6 is still suffering from a statement selection bug which is already fixed for f9. That is selecting a whole statement results in failure to recognise a statement and the 'No statement entered' message.

Explain Plan not showing correct results.

Hi Gurus,
Please help me to understand below issue.
Whenever I am doing explain plan on any of the sql statements it says as explained but when retriving the explain plan output it shows same results again and again.
DB - 11gR2 Stand alone
ASM - Configured.
OS - RHEL 6.2.
SQL> select count(*) from t2114;
COUNT(*)
639292
SQL> explain plan for select count(*) from t2114;
Explained.
SQL> @?/rdbms/admin/utlxpls.sql
PLAN_TABLE_OUTPUT
Plan hash value: 1497650422
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 6634 | 524K| 2993 (19)| 00:00:01 |
| 1 | SORT ORDER BY | | 6634 | 524K| 2993 (19)| 00:00:01 |
| 2 | TABLE ACCESS BY INDEX ROWID| T2210 | 6634 | 524K| 2947 (17)| 00:00:01 |
|* 3 | INDEX RANGE SCAN | T2210_T | 6842 | | 108 (22)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("T2210"."C490008000"=:SYS_B_0 AND "T2210"."C490009100"=:SYS_B_2
AND "T2210"."C301363300"=TO_NUMBER(:SYS_B_1))
16 rows selected.
SQL> explain plan for
2 SELECT T2114.C1 FROM T2114 WHERE ((T2114.C1000000001 = :"SYS_B_0") AND (T2114.C536871442 = :"SYS_B_1") AND (T2114.C536871477 = :"SYS_B_2") AND ((:"SYS_B_3" - T2114.C3) >= :"SYS_B_4") AND ((:"SYS_B_5" - T2114.C3) <= :"SYS_B_6") AND (T2114.C1000000217 LIKE :"SYS_B_7") AND (T2114.C536871478 < :"SYS_B_8")) ORDER BY C1000000161 DESC, :"SYS_B_9" ASC;
Explained.
SQL> SELECT * FROM TABLE(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 1497650422
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 6634 | 524K| 2993 (19)| 00:00:01 |
| 1 | SORT ORDER BY | | 6634 | 524K| 2993 (19)| 00:00:01 |
| 2 | TABLE ACCESS BY INDEX ROWID| T2210 | 6634 | 524K| 2947 (17)| 00:00:01 |
|* 3 | INDEX RANGE SCAN | T2210_T | 6842 | | 108 (22)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("T2210"."C490008000"=:SYS_B_0 AND "T2210"."C490009100"=:SYS_B_2
AND "T2210"."C301363300"=TO_NUMBER(:SYS_B_1))
16 rows selected.

Hi Dom,
Thanks for your immediate response.
I am getting two values for PLAN_TABLE. Please let me know if we need to drop any of them??
SQL> SELECT *
FROM all_objects
WHERE object_name = 'PLAN_TABLE'; 2 3
OWNER OBJECT_NAME SUBOBJECT_NAME OBJECT_ID DATA_OBJECT_ID OBJECT_TYPE CREATED LAST_DDL_TIME TIMESTAMP STATUS T G S NAMESPACE EDITION_NAME
PUBLIC PLAN_TABLE 5127 SYNONYM 17-SEP-11 17-SEP-11 2011-09-17:09:47:47 VALID N N N 1
ARADMIN PLAN_TABLE 219426 219426 TABLE 07-APR-13 07-APR-13 2013-04-07:23:01:12 VALID N N N 1

How to SQL trace File in udump Folder

Hi,
I kept the Sql Trace for one database. Now i am getting the bulk of files in udump folder. I tryed the command
ALTER SESSION SET SQL_TRACE=FALSE
to stop the trace, but it is not stoping.
Now my problem is how to stop this file load in to that folder.
Thank u,

hi,
Thank u alok, Thank u very much. its working fine.
U told first that it is my mistake of enabling in database level. What are the real commands to start the trace and stop the trace by that session. What the Oracle Books says is this commands i followed ( Book name --- ORACLE HIGH PERFORMANCE TUNING FOR 9i AND 10g BY GAVIN POWELL ) Page -- 339
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ALTER SESSION SET TIMED_OS_STATISTICS = 5;
ALTER SESSION SET MAX_DUMP_FILE_SIZE=1M;
ALTER SESSION SET SQL_TRACE = TRUE;
ALTER SESSION SET STATISTICS = ALL;
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Unable to generate SQL trace file in shared mode ??

Hello,
I have a 10.2.0.1.0 database on Win2003 server 64 bits, with several instances.
On instances in dedicated mode, I can create trace files by using dbms_system.set_sql_trace_in_session, but on instances in shared mode nothing happens : no file is created in the udump directory.
This doesn't make any sense to me o_O
The shared parameters are the following :
dispatchers=(protocol=TCP)
shared_servers=1
I've checked all the necessary parameters to create a trace file (user_dump_dest, timed_statistics, max_dump_file_size...) and everything is fine.
I really don't understand why I can't create trace files when the instance is in shared mdoe...
Can anyone help about this weird issue ?
thank you !
regards,
Antoine

Remember also that in Shared Server mode the trace information is not written to a single file but is written to the Shared Server trace file. Before Oracle 10g there was no way to pull all the trace information for a single user session together out of the trace files. There is a tool for doing so with 10g.
HTH -- Mark D Powell --

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Hello Andy_fan
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Explain plan not working

When I run the explain plan by pressing F6 or the execute explain plan button I get the message "Failed to query plan_table" "invalid column name".
However I can do a select * from plan_table
I'm using version 1.5.4 with the latest patch set.
Any ideas?

Getting an invalid column name when performing an explain plan suggests that you have an old plan table structure, compared to what SQL Developer is expecting for your DB version. This can easily happen where your DB has been upgrade without keeping the plan table up to date.
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theFurryOne

Explain Plan not working with 919, was working with 804

Hi,
Explain Plan (F6) was working cprrectly with Raptor 804 and is not working any more on 919. This is the same query exactly (select * from mytable). The server is 9.2.0.5.0. The result with 919 is "Invalid Column Name".
Regards
Eric

I get this too.
The plan table structure is
CREATE TABLE "ELX"."PLAN_TABLE"
   (     "STATEMENT_ID" VARCHAR2(30),
     "TIMESTAMP" DATE,
     "REMARKS" VARCHAR2(80),
     "OPERATION" VARCHAR2(30),
     "OPTIONS" VARCHAR2(30),
     "OBJECT_NODE" VARCHAR2(128),
     "OBJECT_OWNER" VARCHAR2(30),
     "OBJECT_NAME" VARCHAR2(30),
     "OBJECT_INSTANCE" NUMBER,
     "OBJECT_TYPE" VARCHAR2(30),
     "OPTIMIZER" VARCHAR2(255),
     "SEARCH_COLUMNS" NUMBER,
     "ID" NUMBER,
     "PARENT_ID" NUMBER,
     "POSITION" NUMBER,
     "COST" NUMBER,
     "CARDINALITY" NUMBER,
     "BYTES" NUMBER,
     "OTHER_TAG" VARCHAR2(255),
     "PARTITION_START" VARCHAR2(255),
     "PARTITION_STOP" VARCHAR2(255),
     "PARTITION_ID" NUMBER,
     "OTHER" LONG,
     "DISTRIBUTION" VARCHAR2(30)And raptor seems to be issuing this
PARSING IN CURSOR #2 len=82 dep=0 uid=80 oct=50 lid=80 tim=3808125826 hv=1796199517 ad='17ebc98c'
EXPLAIN PLAN SET STATEMENT_ID ='4363' INTO PLAN_TABLE FOR select * from collection
END OF STMT
PARSE #2:c=0,e=742,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=4,tim=3808125815
BINDS #2:
=====================
PARSE ERROR #3:len=480 dep=1 uid=80 oct=2 lid=80 tim=3808128369 err=904
insert into "PLAN_TABLE" (statement_id, timestamp, operation, options,object_node, object_owner, object_name, object_instance, object_type,search_columns, id, parent_id, position, other,optimizer, cost, cardinality, bytes, other_tag, partition_start, partition_stop, partition_id, distribution, cpu_cost, io_cost, temp_space, access_predicates, filter_predicates ) values(:1,SYSDATE,:2,:3,:4,:5,:6,:7,:8,:9,:10,:11,:12,:13,:14,:15,:16,:17,:18,:19,:20,:21,:22,:23,:24,:25,:26,:27)
=====================cpu_cost, io_cost, temp_space, access_predicates, filter_predicates seem to be invalid
Message was edited by:
smitjb

Explain plan output for a sql in JSP page

Hello all,
I have a requirement to give SQL query as an input and get the output and explain plan in the same JSP page. i could get the SQL result, but i want to get the EXPLAIN Plan.
can any one help me in this.
Thanks
Kiran

Hello all,
I have a requirement to give SQL query as an input and get the output and explain plan in the same JSP page. i could get the SQL result, but i want to get the EXPLAIN Plan.
can any one help me in this.
Thanks
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Explain plan not displayed in sql trace file

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