explain the plan using plan_hash_value and runtime

Hello

Please let me know the syntax to get the plan to explain using sql_id and plan_hash_value.

Also let me know how to find out the same sql execution times in the previous months. I have the ID value of sql.

Kind regards

> Is it possible to check how long the sql finished in the previous months?

Of AWR / StatsPack reports.

Or use awrsqrpt.sql which can query the repository for a single SQL_ID AWR.

However, you must have the AWR data kept for 4 months. The default retention is 7 days.

Hemant K Collette

Tags: Database

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a sql id have more than explain the plan so I'd like to come up with plan used at runtime.

Hi all

In a sql oracle11g having id several explain the plan so I'd like to come up with plan used at runtime.
For example SQlID:-8yczg5zav14vt have 5 sql plan and I want to check that we execute at any time, please let me how I can check by sql queries

Concerning
Ranjeet

RanjeetSohale wrote:

I am ok for that but active only plans is right, but in accordance with the foregoing, two data line table in the table SQL V$ so both active and plan cost is high and the other is low.

Yes that's right cost is different, he means here another effective plan for oracle will analyze the declaration again and stored as new slider of the child. Especially since I explained that.

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can you explain the purpose of layout and describe when it should be used?

http://www.Google.com
Use a more specific search term. This will help you get a good answer for your homework. ;-) MS - MVP - Elephant Boy computers - don't panic!

LightroomCC2015 just disabled use.stating I need to purchase a license. I'm running on the plan for this and other applications. How do I fix this, please?

LightroomCC2015 disabled just use of the develop Module. Indicating that I need to buy a license. I'm running on the plan for this and other applications. How do I fix this, please?

Please see the troubleshooting section below.

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explain the plan and so on
Hello world

could someone please provide me with details of explained the plan and I would appreciate some related details explain plan, trace and tkprof

Thank you
Shareef
Hello

PLAN of EXPLAINING is an Oracle utility that analyzes a statement and shows the expected execution plan. It may be different from the implementation plan real for a number of reasons.

Extended SQL trace (10046 event) is a way to gather advanced diagnostic information. There are different levels, at levels 8 and 12 provide the greatest level of detail (you will be able to see the events of waiting and the bind variable values).

TKProf is a utility that processes the raw trace files and makes shaped the output in a more readable way. However, some experts prefer to work with trace files "gross" - they are not so difficult to read, especially if you get some practice.

There are other events of tracing: 10053 allows you to see what is happening inside the Oracle optimizer, 10104 allows to see the stats of hash etc join.

Best regards
Nikolai

difference between the execution plan and explain the plan?
What is the difference between the execution plan & explain the plan?
an execution plan is the actual steps that oracle will pass by when it executes a query.

explain plan is a tool that is used to generate the steps of an execution plan for a query.

Generation to EXPLAIN the PLAN on a database that is open in READ ONLY mode
Hello

I use the Oracle 10.2.0.3 version.

If my database is opened in READ ONLY mode, means that no insert/update/delete operations are allowed here.

During the generation of the PLAN to EXPLAIN this, the PLAN_TABLE registrations for any SQL. But my database is opened in READ ONLY mode, means that no inserts can happen.

So, how can I generate EXPLAIN PLAN for my SQL in this State?

Thanks in advance.

Best regards
oratest
oratest wrote:
I use the Oracle 10.2.0.3 version.

If my database is opened in READ ONLY mode, means that no insert/update/delete operations are allowed here.

During the generation of the PLAN to EXPLAIN this, the PLAN_TABLE registrations for any SQL. But my database is opened in READ ONLY mode, means that no inserts can happen.

So, how can I generate EXPLAIN PLAN for my SQL in this State?

You can always do: 'explain the plan in some_table@remote_database' to avoid inclusion in the local database. Unfortunately 10g added an extraction of the sequence of the code "explain plan", and that's where the call fails if you have tried this distant approach on your version.

Here's an idea that I have not tested. If you configure a link of data to your database from production to the database read-only, you could then do a "explain plan" in the database of production for the SQL statement by changing each object reference in the SQL statement to "object@readonlydatabase". In most cases this will allow the optimizer to recognize the statement as "entirely to distance" and get the optimizer on the readonly database to create the execution plan - which will be then written into the production database.

Concerning
Jonathan Lewis

Explain the plans differ as the parameter value changes

Hi all

My colleague posted a similar question a few days before. Happened because of some bad index. But now we are in a strange situation.

DB:

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production

We use the query below and was working fine until 13.

SQL> explain plan for
  2  SELECT *
  3    FROM gacc_dtl_v1  acc,
  4         gcus_dtl_v1  cus,
  5         gtxn_dtl_v1  txn
  6   WHERE txn.customer_id = cus.customer_number(+)
  7   AND txn.batch_id = cus.batch_id(+)
  8   AND txn.account_number = acc.id
  9   AND acc.batch_id = '130609'
 10   AND cus.batch_id(+) = '130609'
 11   AND txn.batch_id = '130609' AND cus.target IN ('30');

Explained.

SQL> select * from table(dbms_xplan.display);

PLAN_TABLE_OUTPUT
-------------------------------------------------------------------------------------------------------------
Plan hash value: 566819363

-------------------------------------------------------------------------------------------------------------
| Id  | Operation                     | Name                | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |
-------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT              |                     |     1 |   947 |       | 16963   (1)| 00:03:24 |
|   1 |  NESTED LOOPS                 |                     |     1 |   947 |       | 16963   (1)| 00:03:24 |
|*  2 |   HASH JOIN                   |                     |    41 | 26322 |  9136K| 16799   (1)| 00:03:22 |
|*  3 |    TABLE ACCESS BY INDEX ROWID| GTXN_DTL_V1         | 31055 |  8764K|       |  2430   (1)| 00:00:30 |
|*  4 |     INDEX RANGE SCAN          | GTXN_V1_BATCHID_NDX | 60524 |       |       |   156   (2)| 00:00:02 |
|*  5 |    TABLE ACCESS BY INDEX ROWID| GCUS_DTL_V1         |   176K|    59M|       | 10869   (1)| 00:02:11 |
|*  6 |     INDEX RANGE SCAN          | IDX_CUS2_V1         |   198K|       |       |   527   (2)| 00:00:07 |
|   7 |   TABLE ACCESS BY INDEX ROWID | GACC_DTL_V1         |     1 |   305 |       |     4   (0)| 00:00:01 |
|*  8 |    INDEX RANGE SCAN           | GACC_DTL_V1_IDX     |     1 |       |       |     3   (0)| 00:00:01 |
-------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   2 - access("TXN"."CUSTOMER_ID"="CUS"."CUSTOMER_NUMBER" AND "TXN"."BATCH_ID"="CUS"."BATCH_ID")
   3 - filter("TXN"."CUSTOMER_ID" IS NOT NULL)
   4 - access("TXN"."BATCH_ID"='130609')
   5 - filter("CUS"."TARGET"='30')
   6 - access("CUS"."BATCH_ID"='130609')
   8 - access("TXN"."ACCOUNT_NUMBER"="ACC"."ID" AND "ACC"."BATCH_ID"='130609')
       filter(SUBSTR("TXN"."ACCOUNT_NUMBER",1,3)=SUBSTR("ACC"."ID",1,3))

26 rows selected.

It shows a hash join and nested with cost 16963 loops and gives the result in 2-3 seconds. It gives the same plan to explain even now if we use batch_id = '130609'

Now all of a sudden from yesterday it gives different explain the plan below. Only difference in the query below is the value of batch_id

SQL> explain plan for
  2  SELECT *
  3    FROM gacc_dtl_v1  acc,
  4         gcus_dtl_v1  cus,
  5         gtxn_dtl_v1  txn
  6   WHERE txn.customer_id = cus.customer_number(+)
  7   AND txn.batch_id = cus.batch_id(+)
  8   AND txn.account_number = acc.id
  9   AND acc.batch_id = '150609'
 10   AND cus.batch_id(+) = '150609'
 11   AND txn.batch_id = '150609' AND cus.target IN ('30');

Explained.

SQL> select * from table(dbms_xplan.display);

PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------
Plan hash value: 773603995

--------------------------------------------------------------------------------------------------------
| Id  | Operation                     | Name                   | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT              |                        |     1 |   947 |    77   (0)| 00:00:01 |
|   1 |  NESTED LOOPS                 |                        |     1 |   947 |    77   (0)| 00:00:01 |
|   2 |   NESTED LOOPS                |                        |     1 |   594 |    73   (0)| 00:00:01 |
|   3 |    TABLE ACCESS BY INDEX ROWID| GACC_DTL_V1            |     1 |   305 |     4   (0)| 00:00:01 |
|*  4 |     INDEX RANGE SCAN          | GACC_DTL_BATCH_ID_INDX |     1 |       |     3   (0)| 00:00:01 |
|*  5 |    TABLE ACCESS BY INDEX ROWID| GTXN_DTL_V1            |     1 |   289 |    69   (0)| 00:00:01 |
|*  6 |     INDEX RANGE SCAN          | IDX_TXN2_V1            |   125 |       |    12   (0)| 00:00:01 |
|*  7 |   TABLE ACCESS BY INDEX ROWID | GCUS_DTL_V1            |     1 |   353 |     4   (0)| 00:00:01 |
|*  8 |    INDEX RANGE SCAN           | IDX_CUS3_V1            |     1 |       |     3   (0)| 00:00:01 |
--------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   4 - access("ACC"."BATCH_ID"='150609')
   5 - filter("TXN"."CUSTOMER_ID" IS NOT NULL AND "TXN"."BATCH_ID"='150609')
   6 - access("TXN"."ACCOUNT_NUMBER"="ACC"."ID")
       filter(SUBSTR("TXN"."ACCOUNT_NUMBER",1,3)=SUBSTR("ACC"."ID",1,3))
   7 - filter("CUS"."TARGET"='30')
   8 - access("CUS"."BATCH_ID"='150609' AND "TXN"."CUSTOMER_ID"="CUS"."CUSTOMER_NUMBER")
       filter("TXN"."BATCH_ID"="CUS"."BATCH_ID")

26 rows selected.

It shows two loops nested with cost 77, but works for hours. Very very slow.. No idea what's going on...

 select i.table_name,i.index_name,index_type,c.column_name,c.column_position,e.column_expression
   from all_indexes i, all_ind_columns c,all_ind_expressions e
   where c.index_name = i.index_name
   and e.index_name(+) = i.index_name
   and i.table_name in ('GCUS_DTL_V1','GACC_DTL_V1','GTXN_DTL_V')
   order by 1,2,4

TABLE_NAME     INDEX_NAME          INDEX_TYPE          COLUMN_NAME     COLUMN_POSITION     COLUMN_EXPRESSION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
GACC_DTL_V1     GACC_DTL_BATCH_ID_INDX     NORMAL               BATCH_ID          1     
GACC_DTL_V1     GACC_DTL_V1_IDX          NORMAL               BATCH_ID          2     
GACC_DTL_V1     GACC_DTL_V1_IDX          NORMAL               ID               1     
GACC_DTL_V1     GACC_DTL_V1_IDX2     FUNCTION-BASED NORMAL     SYS_NC00101$          1     SUBSTR("ID",1,3)
GACC_DTL_V1     IDX_ACC1_V1          NORMAL               CATEGORY          1     
GACC_DTL_V1     IDX_ACC3_V1          FUNCTION-BASED NORMAL     SYS_NC00099$          1     "CUSTOMER_NUMBER"||'.'||"LIMIT_REF"
GACC_DTL_V1     IDX_ACC4_V1          FUNCTION-BASED NORMAL     SYS_NC00100$          1     "CUSTOMER_NUMBER"||'.000'||"LIMIT_REF"
GACC_DTL_V1     IDX_ACC5_V1          NORMAL               POSTING_RESTRICT     1     
GACC_DTL_V1     IDX_CUS5_V1          NORMAL               CUSTOMER_NUMBER          1     
GACC_DTL_V1     IDX_CUS6_V1          NORMAL               LIMIT_REF          1     
GCUS_DTL_V1     GCUS_DTL_V1_IDX1     NORMAL               CUSTOMER_NUMBER          1     
GCUS_DTL_V1     IDX_CUS2_V1          NORMAL               BATCH_ID          1     
GCUS_DTL_V1     IDX_CUS3_V1          NORMAL               BATCH_ID          1     
GCUS_DTL_V1     IDX_CUS3_V1          NORMAL               CUSTOMER_NUMBER          2     
GCUS_DTL_V1     IDX_CUS3_V1          NORMAL               INDUSTRY          4     
GCUS_DTL_V1     IDX_CUS3_V1          NORMAL               SECTOR               3     
GCUS_DTL_V1     IDX_CUS4_V1          FUNCTION-BASED NORMAL     SYS_NC00078$          1     SUBSTR("DATE_STAMP",1,6)

We are also do not understand why the filter (SUBSTR ("TXN". ""»(, 1, 3) ACCOUNT_NUMBER = SUBSTR ("VAC". " ID", 1, 3)) is used in both queries.

All tables are analyzed today.

Please share your thoughts on this.

Thanks in advance,
Jac

Jac says:

L     H     NUM_BUCKETS     LAST_ANALYZED     SAMPLE_SIZE     HISTOGRAM
------------------------------------------------------------------------------------------------------------------------------------------------
010109     311208     235     13/Jun/2009     5,343     FREQUENCY

You have a histogram of frequencies on the BATCH_ID column missing at least 2 values according to your index statistics (235 buckets vs 237 separate keys).

If the value that you use in the query is missing then this could be the explanation for the estimation of cardinality bad (since you're on pre - 10.2.0.4. In 10.2.0.4 that this behavior changes).

The size of the sample of 5 300 lines is also very low, given the 57,000,000 lines according to the index statistics.

You have two options (which can be combined):

-Increase the size of the sample using a parameter explicitly estimate_percent, for example at least 10 percent

exec DBMS_STATS. GATHER_TABLE_STATS (null, 'GACC_DTL_V1', estimate_percent-online 10, method_opt => 'FOR COLUMNS SIZE 254 BATCH_ID,' waterfall-online fake)

-Get rid of the histogram

exec DBMS_STATS. GATHER_TABLE_STATS (null, 'GACC_DTL_V1', method_opt-online 'FOR BATCH_ID COLUMNS SIZE 1', cascade-online fake)

Note: Is there a particular reason why you store numbers in varchar columns? This might be the reason why Oracle believes that it must generate a histogram using the AUTO SIZE option.

I tend to promote to remove from the histogram, but you must first verify the data if the BATCH_ID values are spread out and the histogram is reasonable:

select
        batch_id
      , count(*)
from
        gacc_dtl_v1
group by
        batch_id;

No constarints are at the DB level. All are processed Application level.

Have you checked this in DBA/ALL/USER_CONSTRAINTS?

It's also a good idea to have constraints at the level of the DB. It keeps your data consistent and quite often helps the optimizer. It allows even 10.2 and later to make things like the elimination of a join table that can make a huge difference in performance.

Kind regards
Randolf

Oracle related blog stuff:
http://Oracle-Randolf.blogspot.com/

SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676 /.
http://sourceforge.NET/projects/SQLT-pp/

Published by: Randolf Geist on June 16, 2009 11:48

Comment added constraints

explain the plan of a query with variables

Trying to Explain plan at some sql code in sql * more. The query has a variable. How can I do this?

I look to explain the plan and dbms_xplan but did not find anything with variables

use sqlplus variable bind:

SQL> --define variable
SQL> var x varchar2

SQL> -- notice the colon prefixing the variable
SQL> explain plan for select * from customer where cid = :x;

Explained.

SQL> select * from table( dbms_xplan.display );

PLAN_TABLE_OUTPUT
-----------------------------------------------------------------------------------------------
Plan hash value: 1709312366

----------------------------------------------------------------------------------------
| Id  | Operation                   | Name     | Rows  | Bytes | Cost (%CPU)| Time     |
----------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT            |          |     1 |    67 |     2   (0)| 00:00:01 |
|   1 |  TABLE ACCESS BY INDEX ROWID| CUSTOMER |     1 |    67 |     2   (0)| 00:00:01 |
|*  2 |   INDEX RANGE SCAN          | CID      |     1 |       |     1   (0)| 00:00:01 |
----------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   2 - access("CID"=:X)

14 rows selected.

the variable should not be set to explain the request, because explain does not actually run.

Published by: shoblock on November 6, 2008 16:51

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its ridiculous... I asked for the plan a month and cloud it recharges on a monthly basis and now when I try to cancel the membership that it does not show the desired option...

Cancel your membership creative cloud

To the link below, click on the still need help? option in the blue box below and choose the option to chat or by phone...
Make sure that you are logged on the Adobe site, having cookies enabled, clearing your cookie cache. If he continues to not try to use a different browser.

https://helpx.Adobe.com/contact.html?step=CCSN_membership-account-payment_cancel-your-memb ership_stillNeedHelp

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I have a DDL which takes a long time to run on the primary
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I tried but the statement explain plan is a failure... Statement requires write Victorian for table plan and may not write in the plan table because db is not open... :) perhapts a new feature to implement in oracle 12g? :)
:)

v11.2.0.2
physical standby
be nice if we could run explains the plan for the system of relief through the primary system :) maybe in 12g?

do not know now. :)

why sometimes the trace file does not explain the plan?
Hello

Sometimes, when I 'alter session set sql_trace = true' and run some querys, some of them don't see explained the plan in the trace file?

I tried "alter system RAS shared_pool" before starting the trace, but not luck.

(Oracle 10g R2)

any ideas?

Thnks
Miguel

Published by: jmmnunes on Apr 27, 2010 18:01
some of them don't watch not explain the plan in the trace file?

Log out of your session after you set the trace sql false?

All cursors must be closed to have access to all the information from the row source in the trace file.

IPhone 7, there will be an adapter jack allowing the two using headphones AND charger?

IPhone 7, there will be an adapter jack allowing the two using headphones AND charger?

Hello

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HP Laserjet Pro M201dw: "then I explained the problem to management and they said not to buy all the HP printers more."

Our two new printers Laserjet Pro M201dw are not recognized on the office network. I have spent hours trying to understand this and posted questions on the forum Support HP, but without response. They became more disadvantages than thay are worth. And that's enough. Then I explained the problem to management and they said 'don't buy it not all HP printers more.'

Thanks for the suggestions.

I tried to BootP and disable ipv6 on a printer and at first, it worked (finally). But then, after having unplugged and restarted, he returned to the ip address of connection no.

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explain the plan using plan_hash_value and runtime

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