SQL statement Execution

Hi,
Can anyone explain my below doubt as i get confused each time when i refer any online documents.
when we hit a SQL statement to execute in oracle, how SQL engine process the statement and which memory structure in oracle instance is used in the process?
Many Thanks,
Vipin Kumar Rai

AnarGodjaev wrote:
Hi,
Below link:
SQL Limitations For Oracle Database Lite
http://awads.net/wp/2010/02/15/oracle-database-limits-you-may-not-know-about/
More Information: PL/SQL Program Limits
Thank you
Why are you posting all these odd links?
First you post a link to ancient and out of date oracle 7 documentation.
Now you're posting a link to Oracle Database Lite.
And a link to someone's blog about the database limits that is just a duplication of what's in the documentation.
None of these were specifically mentioned by the OP as a requirement for the question.
The forum does not need things sharing just because you feel like it, as that can amount to spamming. If you have specific information relevant to the question then please post it, but otherwise don't just post loads of links for no good reason; and any links you do post, make sure they relate to currently supported versions of the database unless the OP specifies otherwise.
Aside from that, if you're just googling for links to post, in the hope of giving an quick answer and getting points on the forum... please don't bother. This sort of behaviour is noticed and will be reported to the admin who may terminate your account for such things.

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Bulk Loading using remote sql statement execution

Well, i have a different scenario. I want to bulk load the tables like we do in MySQL with LOAD LOCAL DATA sql command.
I have a file populated with data, what sql statement would bulk load the data into specified table using that file?
Adnan Memon

In Oracle, you would either use the SQL*Loader utility to load data from a flat file or you would create an external table (9i and later) that loads the flat file.
A quick example of the external table approach
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Muti sql statements execution issue   with DB2 - iSeries

Hello,
I am encountering "[SQL0104] Token ; was not valid. Valid tokens: ). " error , when I execute below statement.
Using ; (semi colon) for sql statements separation.
Please let me know , how to fix it.
Thanks in advance.
<cfquery name="qInsertTo" datasource="dsn">
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Hi,
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SQL STATEMENT EXECUTES

Hi All
HOw oracle SQL statements executes ? Can anyone explain me for SELECT, INSERT,UPDATE and COMMIT statements works ?
Regards
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Krishna,
Search for SQL Statement Execution and see the Flow Chart.
http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14220/sqlplsql.htm
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Multiple Executions Plans for the same SQL statement

Dear experts,
awrsqrpt.sql is showing multiple executions plans for a single SQL statement. How is it possible that one SQL statement will have multiple Executions Plans within the same AWR report.
Below is the awrsqrpt's output for your reference.
WORKLOAD REPOSITORY SQL Report
Snapshot Period Summary
DB Name         DB Id    Instance     Inst Num Release     RAC Host
TESTDB          2157605839 TESTDB1               1 10.2.0.3.0 YES testhost1
              Snap Id      Snap Time      Sessions Curs/Sess
Begin Snap:     32541 11-Oct-08 21:00:13       248     141.1
End Snap:     32542 11-Oct-08 21:15:06       245     143.4
   Elapsed:               14.88 (mins)
   DB Time:               12.18 (mins)
SQL Summary                            DB/Inst: TESTDB/TESTDB1 Snaps: 32541-32542
                Elapsed
   SQL Id      Time (ms)
51szt7b736bmg     25,131
Module: SQL*Plus
UPDATE TEST SET TEST_TRN_DAY_CL = (SELECT (NVL(ACCT_CR_BAL,0) + NVL(ACCT_DR_BAL,
0)) FROM ACCT WHERE ACCT_TRN_DT = (:B1 ) AND TEST_ACC_NB = ACCT_ACC_NB(+)) WHERE
TEST_BATCH_DT = (:B1 )
SQL ID: 51szt7b736bmg                  DB/Inst: TESTDB/TESTDB1 Snaps: 32541-32542
-> 1st Capture and Last Capture Snap IDs
   refer to Snapshot IDs witin the snapshot range
-> UPDATE TEST SET TEST_TRN_DAY_CL = (SELECT (NVL(ACCT_CR_BAL,0) + NVL(AC...
    Plan Hash           Total Elapsed                 1st Capture   Last Capture
#   Value                    Time(ms)    Executions       Snap ID        Snap ID
1   2960830398                 25,131             1         32542          32542
2   3834848140                      0             0         32542          32542
Plan 1(PHV: 2960830398)
Plan Statistics                        DB/Inst: TESTDB/TESTDB1 Snaps: 32541-32542
-> % Total DB Time is the Elapsed Time of the SQL statement divided
   into the Total Database Time multiplied by 100
Stat Name                                Statement   Per Execution % Snap
Elapsed Time (ms)                            25,131       25,130.7     3.4
CPU Time (ms)                                23,270       23,270.2     3.9
Executions                                        1            N/A     N/A
Buffer Gets                               2,626,166    2,626,166.0    14.6
Disk Reads                                      305          305.0     0.3
Parse Calls                                       1            1.0     0.0
Rows                                        371,735      371,735.0     N/A
User I/O Wait Time (ms)                         564            N/A     N/A
Cluster Wait Time (ms)                            0            N/A     N/A
Application Wait Time (ms)                        0            N/A     N/A
Concurrency Wait Time (ms)                        0            N/A     N/A
Invalidations                                     0            N/A     N/A
Version Count                                     2            N/A     N/A
Sharable Mem(KB)                                 26            N/A     N/A
Execution Plan
| Id | Operation                    | Name            | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | UPDATE STATEMENT             |                 |       |       | 1110 (100)|          |
|   1 | UPDATE                      | TEST            |       |       |            |          |
|   2 |   TABLE ACCESS FULL          | TEST            |   116K| 2740K| 1110   (2)| 00:00:14 |
|   3 |   TABLE ACCESS BY INDEX ROWID| ACCT            |     1 |    26 |     5   (0)| 00:00:01 |
|   4 |    INDEX RANGE SCAN          | ACCT_DT_ACC_IDX |     1 |       |     4   (0)| 00:00:01 |
Plan 2(PHV: 3834848140)
Plan Statistics                        DB/Inst: TESTDB/TESTDB1 Snaps: 32541-32542
-> % Total DB Time is the Elapsed Time of the SQL statement divided
   into the Total Database Time multiplied by 100
Stat Name                                Statement   Per Execution % Snap
Elapsed Time (ms)                                 0            N/A     0.0
CPU Time (ms)                                     0            N/A     0.0
Executions                                        0            N/A     N/A
Buffer Gets                                       0            N/A     0.0
Disk Reads                                        0            N/A     0.0
Parse Calls                                       0            N/A     0.0
Rows                                              0            N/A     N/A
User I/O Wait Time (ms)                           0            N/A     N/A
Cluster Wait Time (ms)                            0            N/A     N/A
Application Wait Time (ms)                        0            N/A     N/A
Concurrency Wait Time (ms)                        0            N/A     N/A
Invalidations                                     0            N/A     N/A
Version Count                                     2            N/A     N/A
Sharable Mem(KB)                                 26            N/A     N/A
Execution Plan
| Id | Operation                    | Name         | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | UPDATE STATEMENT             |              |       |       |     2 (100)|          |
|   1 | UPDATE                      | TEST         |       |       |            |          |
|   2 |   TABLE ACCESS BY INDEX ROWID| TEST         |     1 |    28 |     2   (0)| 00:00:01 |
|   3 |    INDEX RANGE SCAN          | TEST_DT_IND |     1 |       |     1   (0)| 00:00:01 |
|   4 |   TABLE ACCESS BY INDEX ROWID| ACCT         |     1 |    26 |     4   (0)| 00:00:01 |
|   5 |    INDEX RANGE SCAN          | INDX_ACCT_DT |     1 |       |     3   (0)| 00:00:01 |
Full SQL Text
SQL ID       SQL Text
51szt7b736bm UPDATE TEST SET TEST_TRN_DAY_CL = (SELECT (NVL(ACCT_CR_BAL, 0) +
              NVL(ACCT_DR_BAL, 0)) FROM ACCT WHERE ACCT_TRN_DT = (:B1 ) AND PB
             RN_ACC_NB = ACCT_ACC_NB(+)) WHERE TEST_BATCH_DT = (:B1 )Your input is highly appreciated.
Thanks for taking your time in answering my question.
Regards

Oracle Lover3 wrote:
Dear experts,
awrsqrpt.sql is showing multiple executions plans for a single SQL statement. How is it possible that one SQL statement will have multiple Executions Plans within the same AWR report.If you're using bind variables and you've histograms on your columns which can be created by default in 10g due to the "SIZE AUTO" default "method_opt" parameter of DBMS_STATS.GATHER__STATS it is quite normal that you get different execution plans for the same SQL statement. Depending on the values passed when the statement is hard parsed (this feature is called "bind variable peeking" and enabled by default since 9i) an execution plan is determined and re-used for all further executions of the same "shared" SQL statement.
If now your statement ages out of the shared pool or is invalidated due to some DDL or statistics gathering activity it will be re-parsed and again the values passed in that particular moment will determine the execution plan. If you have skewed data distribution and a histogram in place that reflects that skewness you might get different execution plans depending on the actual values used.
Since this "flip-flop" behaviour can sometimes be counter-productive if you're unlucky and the values used to hard parse the statement leading to a plan that is unsuitable for the majority of values used afterwards, 11g introduced the "adaptive" cursor sharing that attempts to detect such a situation and can automatically re-evaluate the execution plan of the statement.
Regards,
Randolf
Oracle related stuff blog:
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/

Find start and end execution time of a sql statement?

I am have databases with 10.2.0.3 and 9.2.0.8 on HP UNIX 11i and Windows 200x.
I am not in a position to turn on sql tracing in production environment. Yet, I want to find when a sql statement started executing and when it ended. When I look at v$sql, it has information such FIRST_LOAD_TIME, LAST_LOAD_TIME etc. No where it has information last time statement began execution and when it ended execution.. It shows no of executions, elapsed time etc, but they are cumulative. Is there a way to find individual times (time information each time a sql statement was executed. – its start time, its end time ….)? If I were to write my own program how will I do it?
Along the same line, when an AWR snapshot is shown, does it only include statements executed during that snapshot or it can have statements from the past if they have not been flushed from shared memory. If it only has statements executed in the snapshot period, how does it know when statement began execution?

Hi,
For oracle 10g you can use below query to find start and end time, you can see data for last seven days.
select min(to_char(a.sample_time,'DD-MON-YY HH24:MI:SS')) "Start time", max(to_char(a.sample_time,'DD-MON-YY HH24:MI:SS')) "End Time", b.sql_text
from dba_HIST_ACTIVE_SESS_HISTORY a,DBA_HIST_SQLTEXT b where
a.sql_id=b.sql_id
order by 1;
Regards
Jafar

Execution of SQL statement 'alter tablespace PSAPSR3

Dear mastah,
I trying extend tablesapce at oracle, but not succesfully, and have problem,
maybe can help this issue..
error problem add tablespace:
BR0280I BRSPACE time stamp: 2014-01-06 10.27.31
BR0370I Directory /oracle/SID/sapreorg/semxnacf created
BR0280I BRSPACE time stamp: 2014-01-06 10.27.32
BR0319I Control file copy created: /oracle/SID/sapreorg/semxnacf/cntrlSID.old 99106816
BR0280I BRSPACE time stamp: 2014-01-06 10.27.32
BR1088I Extending tablespace PSAPSR3...
BR0280I BRSPACE time stamp: 2014-01-06 10.27.51
BR0301E SQL error -59 at location BrSqlExecute-1, SQL statement:
'/* BRSPACE */ alter tablespace PSAPSR3 add datafile '/oracle/SID/sapdata16/sr3_218/sr3.data218' size 4000M autoextend off'
ORA-00059: maximum number of DB_FILES exceeded
BR1017E Execution of SQL statement 'alter tablespace PSAPSR3 add datafile '/oracle/SID/sapdata16/sr3_218/sr3.data218' size 4000M autoextend off' failed
BR0669I Cannot continue due to previous warnings or errors - you can go back to repeat the last action
BR0280I BRSPACE time stamp: 2014-01-06 10.27.51
BR0671I Enter 'b[ack]' to go back, 's[top]' to abort:
regards,
amin

BR1088I Extending tablespace PSAPSR3...
BR0280I BRSPACE time stamp: 2014-01-06 10.27.51
BR0301E SQL error -59 at location BrSqlExecute-1, SQL statement:
'/* BRSPACE */ alter tablespace PSAPSR3 add datafile '/oracle/SID/sapdata16/sr3_218/sr3.data218' size 4000M autoextend off'
ORA-00059: maximum number of DB_FILES exceeded
$ oerr ora 59
00059, 00000, "maximum number of DB_FILES exceeded"
// *Cause: The value of the DB_FILES initialization parameter was exceeded.
// *Action: Increase the value of the DB_FILES parameter and warm start.
$

Can the format of a SQL Statement modify the execution time of an SQL ....

Can the format of a SQL Statement modify the execution time of an SQL statement?
Thanks in advance

It depends on:
1) What oracle version are you using
2) What do you mean for "format"
For example: if you're on Oracle9i and changing format means changing the order of the tables in the FROM clause and you're using Rule Based Optimizer then the execution plan and the execution time can be very different...
Max
[My Italian Oracle blog|http://oracleitalia.wordpress.com/2009/12/29/estrarre-i-dati-in-formato-xml-da-sql/]

MDM Database command execution error. A SQL statement failed to execute

Hi,
When we tried to execute an MDM Java query modify/create, we get the following dump.
Is this anything to do with the parameters that we pass or is it something to do with the database ?
We have checked the code and we do not find anything wrong with the code at all.
We are using Java API 5.5.63.73 and calling MDM API's using WebDynpro for Java.
I have noticed this issue has been raised here as well :
Database command execution error. (While mounting a repository)
com.sap.mdm.commands.CommandException:
com.sap.mdm.internal.protocol.manual.ServerException: Database command execution error. A SQL
statement failed to execute. The actual error may have been written to a log file. at
com.sap.mdm.data.commands.ModifyRecordCommand.execute(ModifyRecordCommand.java:163) at
Regards,
Subramanian V.
Edited by: Subramanian Venkateswaran on Dec 10, 2008 8:11 PM

Hi Subramanian ,
The error looks more like a problem with the data base or MDM system rather than the java code.
Which is the underlying database you are using with MDM? As some users have faced some difficulties when working with the DB2 Data base,If this is the data base you too are working upon then may be the issue could be similar,if possible try using the Oracle or SQL data base as these databse show more compatibility than a DB2 when working with MDM .
Also check the MDM users autorization and authentication to modifyor create recordrs in MDM.try given the user the ADMIN rights,and tehn try and see if teh user is able to modify/Create the mdm records.
Lastly you can check the database instance and listener configuration correctly.try restarting the Database service form the system if possible.
Hope It Helped
Thanks & Regards
Simona Pinto

RMAN-11003: failure during parse/execution of SQL statement: alter session

without doing any changes I have started getting the following error in the RMAN logs.
i didnt any changes related to sort_area_size but getting the error below
plz help guys
RMAN logs
=====================
connected to recovery catalog database
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of allocate command at 12/03/2007 22:00:01
RMAN-03014: implicit resync of recovery catalog failed
RMAN-03009: failure of full resync command on default channel at 12/03/2007 22:00:01
RMAN-11003: failure during parse/execution of SQL statement: alter session set sort_area_size=10485760
ORA-00068: invalid value 10485760 for parameter sort_area_size, must be between 0 and 1

Hi:
It seems when you are starting RMAN it's executing some commands (one 'ALTER SESSION...'. It's seems to be a batch which has a bad value for SORT_AREA_SIZE. Find it and modify to a proper value as message shows. If you can't find start RMAN by calling directly the executable ($ORACLE_HOME/bin/rman or %ORACLE_HOME%/bin/rman.exe).

How to view the SQL statement generated during execution of the BW Query?

Dear Experts,
I am trying to retrieve data in a SAP BW Query from a Non-SAP system.
I think if I am able to see the complete SQL statement that was generated when I executed the BW Query, I may be able to use it to retrieve the data.
Do you know how and where I can see the SQL statement of a BW Query's SQL statement?
I tried RSRT options to execute the Query but still could not find the SQL statement.
Thanks in advance.
Regards,
Shunhui.

hi
goto rsrt
give your query name
select execute + debug option
in the debug option under data manager check the check box "display SQL/BIA query
selcet continue
you can see the sql statement
thanq

View the reports sql statement before execution

Hi
I am developing reports with dynamic sql statements.
How can I view the complete reports sql statement which is sent to the database?
Thanks
Juerg

You can turn on the trace functionality. That will display the actual SQL statements sent to the database in the trace file.

Check the validity of a SQL statement before execution

Hi everyone,
In an applet I have created, I am allowing the user to create a SQL statement which will be sent to a servlet that in turn issues the JDBC request for the SQL statement. My concern is that since my GUI lets the user create more or less any kind of SQL statement (including an illegal one) I need to verify if the user has created the correct SQL. How can this be achieved?
To recapitulate and summarize, I need to know how I can check the validity of a SQL statement without actually executing it and handling the SQLException. FYI, I am using the mm-mysql driver.
Thanks,
Alan

jschell is correct. Unless you're writing something like an ISQL tool you want to be very careful doing this.
Having said that Mimer SQL have SQL validators that may do what you want http://developer.mimer.com/validator/index.htm
They've also got the SQL Validator running as a web service that you can use. Theres example code here showing how to use it.
http://sqlvalidator.mimer.com/index.html
At the risk of being accused of selfpromotion you can check out the SQL Validator plugin for SQuirreL SQL CLient. This is a fully functional example of using the Mimer SQL Validation web service. http://squirrel-sql.sourceforge.net/
Col

Connecting strings for execution as SQL-Statement

Hello to all.
I've the problem, that I want to write a package which handels occuring erros as far as possible automatically.
One part is to recompile invalid objects.
I can find all these objects by useing the following cursor:
CURSOR curInvalidObjects
IS SELECT OBJECT_TYPE, OWNER, OBJECT_NAME
          from dba_objects a
          where STATUS = 'INVALID' and
          OWNER = 'BESECKE' AND
          OBJECT_TYPE in ( 'PACKAGE BODY',
'PACKAGE', 'FUNCTION', 'PROCEDURE',
'TRIGGER', 'VIEW' )
          order by OWNER, OBJECT_TYPE, OBJECT_NAME;
After opening the cursor I can go trough the records and recompile the objects with something like this:
alter || recInvalidObjects.OBJECT_TYPE || ' '
|| recInvalidObjects.OWNER || '.' ||
recInvalidObjects.OBJECT_NAME || compile;
But that does not work. In this way I can't get any executable SQL-Statement. It just becomes a string, but it's not executable.
I think it's a simple problem, but I tried to find anything about executable stings in the documentation I have, and I could not find anything. So can anybody give me a short hint, how to create an executable statement?
Thanks a lot.
Susanne Saalmann

If you just recompile without taking the correct order of compilation into account, you will have to run your statement a couple of times. This script solves that:
SET HEADING OFF
SET FEEDBACK OFF
SET PAGES 9999
SET TIMING OFF
SET TERMOUT ON
COLUMN noprn NOPRINT
SPOOL comp.sql
SELECT 'ALTER '||
DECODE( o.object_type, 'PACKAGE BODY', 'PACKAGE', o.object_type)||
' '||decode(o.object_type,'JAVA CLASS','"',null)||
o.object_name || decode(o.object_type,'JAVA CLASS','"',null)||
' COMPILE '||
DECODE( o.object_type, 'PACKAGE BODY', 'BODY;', ';'),
COUNT( d.name ) noprn
FROM user_objects o,
user_dependencies d
WHERE o.object_name = d.referenced_name(+)
AND o.object_type = d.referenced_type(+)
AND o.status = 'INVALID'
GROUP BY o.object_name, o.object_type
ORDER BY noprn DESC
SPOOL OFF
SET HEADING ON
SET FEEDBACK ON
SET PAGES 14
START comp.sql
SHOW USER
SELECT object_type, status, count(*)
FROM user_objects
GROUP BY object_type, status

HOW TO: Post a SQL statement tuning request - template posting

This post is not a question, but similar to Rob van Wijk's "When your query takes too long ..." post should help to improve the quality of the requests for SQL statement tuning here on OTN.
On the OTN forum very often tuning requests about single SQL statements are posted, but the information provided is rather limited, and therefore it's not that simple to provide a meaningful advice. Instead of writing the same requests for additional information over and over again I thought I put together a post that describes how a "useful" post for such a request should look like and what information it should cover.
I've also prepared very detailed step-by-step instructions how to obtain that information on my blog, which can be used to easily gather the required information. It also covers again the details how to post the information properly here, in particular how to use the \ tag to preserve formatting and get a fixed font output:
http://oracle-randolf.blogspot.com/2009/02/basic-sql-statement-performance.html
So again: This post here describes how a "useful" post should look like and what information it ideally covers. The blog post explains in detail how to obtain that information.
In the future, rather than requesting the same additional information and explaining how to obtain it, I'll simply refer to this HOW TO post and the corresponding blog post which describes in detail how to get that information.
*Very important:*
Use the \ tag to enclose any output that should have its formatting preserved as shown below.
So if you want to use fixed font formatting that preserves the spaces etc., do the following:
\   This preserves formatting
\And it will look like this:
   This preserves formatting
   . . .Your post should cover the following information:
1. The SQL and a short description of its purpose
2. The version of your database with 4-digits (e.g. 10.2.0.4)
3. Optimizer related parameters
4. The TIMING and AUTOTRACE output
5. The EXPLAIN PLAN output
6. The TKPROF output snippet that corresponds to your statement
7. If you're on 10g or later, the DBMS_XPLAN.DISPLAY_CURSOR output
The above mentioned blog post describes in detail how to obtain that information.
Your post should have a meaningful subject, e.g. "SQL statement tuning request", and the message body should look similar to the following:
*-- Start of template body --*
The following SQL statement has been identified to perform poorly. It currently takes up to 10 seconds to execute, but it's supposed to take a second at most.
This is the statement:
select
from
         t_demo
where
         type = 'VIEW'
order by
         id;It should return data from a table in a specific order.
The version of the database is 11.1.0.7.
These are the parameters relevant to the optimizer:
SQL>
SQL> show parameter optimizer
NAME                                 TYPE        VALUE
optimizer_capture_sql_plan_baselines boolean     FALSE
optimizer_dynamic_sampling           integer     2
optimizer_features_enable            string      11.1.0.7
optimizer_index_caching              integer     0
optimizer_index_cost_adj             integer     100
optimizer_mode                       string      ALL_ROWS
optimizer_secure_view_merging        boolean     TRUE
optimizer_use_invisible_indexes      boolean     FALSE
optimizer_use_pending_statistics     boolean     FALSE
optimizer_use_sql_plan_baselines     boolean     TRUE
SQL>
SQL> show parameter db_file_multi
NAME                                 TYPE        VALUE
db_file_multiblock_read_count        integer     8
SQL>
SQL> show parameter db_block_size
NAME                                 TYPE        VALUE
db_block_size                        integer     8192
SQL>
SQL> show parameter cursor_sharing
NAME                                 TYPE        VALUE
cursor_sharing                       string      EXACT
SQL>
SQL> column sname format a20
SQL> column pname format a20
SQL> column pval2 format a20
SQL>
SQL> select
2            sname
3          , pname
4          , pval1
5          , pval2
6 from
7          sys.aux_stats$;
SNAME                PNAME                     PVAL1 PVAL2
SYSSTATS_INFO        STATUS                          COMPLETED
SYSSTATS_INFO        DSTART                          01-30-2009 16:25
SYSSTATS_INFO        DSTOP                           01-30-2009 16:25
SYSSTATS_INFO        FLAGS                         0
SYSSTATS_MAIN        CPUSPEEDNW              494,397
SYSSTATS_MAIN        IOSEEKTIM                    10
SYSSTATS_MAIN        IOTFRSPEED                 4096
SYSSTATS_MAIN        SREADTIM
SYSSTATS_MAIN        MREADTIM
SYSSTATS_MAIN        CPUSPEED
SYSSTATS_MAIN        MBRC
SYSSTATS_MAIN        MAXTHR
SYSSTATS_MAIN        SLAVETHR
13 rows selected.Here is the output of EXPLAIN PLAN:
SQL> explain plan for
2 -- put your statement here
3 select
4            *
5 from
6            t_demo
7 where
8            type = 'VIEW'
9 order by
10            id;
Explained.
Elapsed: 00:00:00.01
SQL>
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 1390505571
| Id | Operation                   | Name     | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT            |          |     1 |    60 |     0   (0)| 00:00:01 |
|   1 | TABLE ACCESS BY INDEX ROWID| T_DEMO   |     1 |    60 |     0   (0)| 00:00:01 |
|* 2 |   INDEX RANGE SCAN          | IDX_DEMO |     1 |       |     0   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   2 - access("TYPE"='VIEW')
14 rows selected.Here is the output of SQL*Plus AUTOTRACE including the TIMING information:
SQL> rem Set the ARRAYSIZE according to your application
SQL> set autotrace traceonly arraysize 100
SQL> select
2            *
3 from
4            t_demo
5 where
6            type = 'VIEW'
7 order by
8            id;
149938 rows selected.
Elapsed: 00:00:02.21
Execution Plan
Plan hash value: 1390505571
| Id | Operation                   | Name     | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT            |          |     1 |    60 |     0   (0)| 00:00:01 |
|   1 | TABLE ACCESS BY INDEX ROWID| T_DEMO   |     1 |    60 |     0   (0)| 00:00:01 |
|* 2 |   INDEX RANGE SCAN          | IDX_DEMO |     1 |       |     0   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   2 - access("TYPE"='VIEW')
Statistics
          0 recursive calls
          0 db block gets
     149101 consistent gets
        800 physical reads
        196 redo size
    1077830 bytes sent via SQL*Net to client
      16905 bytes received via SQL*Net from client
       1501 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
     149938 rows processed
SQL>
SQL> disconnect
Disconnected from Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing optionsThe TKPROF output for this statement looks like the following:
TKPROF: Release 11.1.0.7.0 - Production on Mo Feb 23 10:23:08 2009
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Trace file: orcl11_ora_3376_mytrace1.trc
Sort options: default
count    = number of times OCI procedure was executed
cpu      = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk     = number of physical reads of buffers from disk
query    = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows     = number of rows processed by the fetch or execute call
select
from
         t_demo
where
         type = 'VIEW'
order by
         id
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch     1501      0.53       1.36        800     149101          0      149938
total     1503      0.53       1.36        800     149101          0      149938
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 88
Rows     Row Source Operation
149938 TABLE ACCESS BY INDEX ROWID T_DEMO (cr=149101 pr=800 pw=0 time=60042 us cost=0 size=60 card=1)
149938   INDEX RANGE SCAN IDX_DEMO (cr=1881 pr=1 pw=0 time=0 us cost=0 size=0 card=1)(object id 74895)
Elapsed times include waiting on following events:
Event waited on                             Times   Max. Wait Total Waited
----------------------------------------   Waited ---------- ------------
SQL*Net message to client                    1501        0.00          0.00
db file sequential read                       800        0.05          0.80
SQL*Net message from client                  1501        0.00          0.69
********************************************************************************The DBMS_XPLAN.DISPLAY_CURSOR output:
SQL> -- put your statement here
SQL> -- use the GATHER_PLAN_STATISTICS hint
SQL> -- if you're not using STATISTICS_LEVEL = ALL
SQL> select /*+ gather_plan_statistics */
2 *
3 from
4 t_demo
5 where
6 type = 'VIEW'
7 order by
8 id;
149938 rows selected.
Elapsed: 00:00:02.21
SQL>
SQL> select * from table(dbms_xplan.display_cursor(null, null, 'ALLSTATS LAST'));
PLAN_TABLE_OUTPUT
SQL_ID d4k5acu783vu8, child number 0
select   /*+ gather_plan_statistics */          * from          t_demo
where          type = 'VIEW' order by          id
Plan hash value: 1390505571
| Id | Operation                   | Name     | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads |
|   0 | SELECT STATEMENT            |          |      1 |        |    149K|00:00:00.02 |     149K|   1183 |
|   1 | TABLE ACCESS BY INDEX ROWID| T_DEMO   |      1 |      1 |    149K|00:00:00.02 |     149K|   1183 |
|* 2 |   INDEX RANGE SCAN          | IDX_DEMO |      1 |      1 |    149K|00:00:00.02 |    1880 |    383 |
Predicate Information (identified by operation id):
   2 - access("TYPE"='VIEW')
20 rows selected.I'm looking forward for suggestions how to improve the performance of this statement.
*-- End of template body --*
I'm sure that if you follow these instructions and obtain the information described, post them using a proper formatting (don't forget about the \ tag) you'll receive meaningful advice very soon.
So, just to make sure you didn't miss this point:Use proper formatting!
If you think I missed something important in this sample post let me know so that I can improve it.
Regards,
Randolf
Oracle related stuff blog:
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/

Alex Nuijten wrote:
...you missed the proper formatting of the Autotrace section ;-)Alex,
can't reproduce, does it still look unformatted? Or are you simply kidding? :-)
Randolf
PS: Just noticed that it actually sometimes doesn't show the proper formatting although the code tags are there. Changing to the \ tag helped in this case, but it seems to be odd.
Edited by: Randolf Geist on Feb 23, 2009 11:28 AM
Odd behaviour of forum software

SQL statement Execution

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