Execution time difference between SELECT & UPDATE statement in JDBC Sender.

Hi Experts,
In my scenario, I have used the JDBC Sender Adapter with the SELECT and UPDATE statement.
Now the problem is in between the execution of Select and update statement, few more entries are coming in the same DB Table.
So result of this is updation take place for those entries which are not even picked up by the select statement.
Can we avoid this execution time difference between the SELECT & UPDATE statemet on JDBC Sender side???
Thanks & Regards
Jagesh

Hi
Use serializable option in additional parameters, now all new entries would also be updated.

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We noticed that output of query execution time is quite differ between statspack and session tracing (DBMS_MONITOR) report. The query execution time in Statspack was 1402 sec and in session trace file was 312.25 Sec. FYI database version is 11.2.0.3 which is installed on platform OL 5.8
Both of the following reports (Staspack/tracing) was executed on same system and at the same time. Could you suggest why execution time is differ in staspack and session tracing?
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Thanks
Rajdeep

Hi,
First of all, please read the [url https://wikis.oracle.com/display/Forums/Forums+FAQ]FAQ page and find out how to use the code tags to format your output properly so that it's readable.
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Update- statement in JDBC sender Adapter

Hi ,
I have a requirement where I am trying to fetch data from ODS based on some flag and immediately I want to update the flag status . So I used selected and update in JDBC sender adapter .
But I have one question , in the small timeframe where XI has done a select and just before XI could issue the update statement if a new record is added to ODS . Then that new record will also get updated though it wasnot selected in select statement .
Can someone let me know how to overcome this problem ; as I want to make sure I update only those recrods which are selected in select statement ??
Thanks & Regards,
Suvarna

Hi,
Check out the following thread. It gives the exact answer to this question.
JDBC Sender Update Query
One of the replies in the above thread:
I put in an OSS note asking this exact question with your specific example, and got a reply. I was referred to OSS note 0000831162, where it is explained very unambiguously that the SELECT and UPDATE queries are run in the same transaction.
Regards,
P.Venkat
Message was edited by:
Venkataramanan

How to calculate the % of time difference between different state

Hi there,
The below query returns the follwoign outptut. I need to calculate the % of time period that a specific state ( state ex: open or closed or all report )exists.
I have to find the time difference between the 2 states . How could I do that ?
The first row shows null for the previous state . How could get actual previous state for the first row?
SELECT si.station_name,
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                ash.state_id ,
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left outer join vppstation.avi_control_state_code
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LEFT OUTER JOIN vpproadside.stations_installed si
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       group by si.station_name
                     ash.state_id
       order by ash.state_eff_date asc ;
STATION_NAME                   STATE_SHORT_NAME STATE_ID               PREVIOUS_STATE         periods in sec         Date
IRDNCST02                      Open             1                    NULL                  85166                  01-mar-2010 23:39:26 pm
IRDNCST02                      All Report       3                      1                      85159                  01-mar-2010 23:39:19 pm
IRDNCMT01                      Closed           2                      3                      81376                  01-mar-2010 22:36:16 pm
IRDNCST02                      Open             1                      2                      78723                  01-mar-2010 21:52:03 pm
IRDNCST02                      All Report       3                      1                      76023                  01-mar-2010 21:07:03 pm
IRDNCMT01                      Open             1                      3                      55922                  01-mar-2010 15:32:02 pm
IRDNCMT01                      Closed           2                      1                      54931                  01-mar-2010 15:15:31 pm
IRDNCHA01                      Closed           2                      2                      41291                  01-mar-2010 11:28:11 am
IRDNCAS01                      Open             1                      2                      38847                  01-mar-2010 10:47:27 am
IRDNCAS01                      All Report       3                      1                      37947                  01-mar-2010 10:32:27 am
IRDNCST02                      Open             1                      3                      35332                  01-mar-2010 09:48:52 am
IRDNCST02                      All Report       3                      1                      32632                  01-mar-2010 09:03:52 am
IRDNCST02                      Open             1                      3                      31502                  01-mar-2010 08:45:02 am
IRDNCST02                      All Report       3                      1                      28802                  01-mar-2010 08:00:02 am
IRDNCHI01                      Open             1                      3                      25368                  01-mar-2010 07:02:48 am
IRDNCHI02                      Open             1                      1                      23939                  01-mar-2010 06:38:59 am
IRDNCMT01                      Open             1                      1                      20696                  01-mar-2010 05:44:56 am
IRDNCCH02                      Open             1                      1                      13452                  01-mar-2010 03:44:12 am
Edited by: Indhu Ram on Mar 11, 2010 1:34 PM
Edited by: Indhu Ram on Mar 11, 2010 2:20 PM

If you look at the table which is output of the given query , there is column called "STATE_ID" It shows the current state ie open or closed or all report.
The column 'PREVIOUS_STATE' shows the state before the current state. .In the table in 2nd row in previous_state column there is state_id = 1 (open)which is the state before 'all report state'

Difference between select single * & select upto 1 rows

difference between select single * & select upto 1 rows

Hi,
According to SAP Performance course the SELECT UP TO 1 ROWS is faster than SELECT SINGLE because you are not using all the primary key fields.
Select single is a construct designed to read database records with primary key. In the absence of the primary key, it might end up doing a sequential search, whereas the select up to 1 rows may assume that there is no primary key supplied and will try to find most suitable index.
The best way to find out is through sql trace or runtime analysis.
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Mainly: to check if entries exist.
Select Single
You need to mention all the key fields of the table.
No END SELECT required.
More performance compared to upto 1 row.
Where as UP to 1 row.
YOu can use if you do not have all the primiary key fields available.
END SELECT requeired.
Since all keys are not passing, possiblities of have other rows which satisfies the condition.
Select Statement with EndSelect is a loop, which in a single run retrieves a single Record. This Record has to be stored in a Work Area and then appended into an Internal Table.
Select Statements without EndSelect is not a loop and it retrieves the whole Record set matching the Criteria in a single shot and has to be Stored in an Internal Table Directly.
The most important thing to remember about the SELECT SINGLE is
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2) It does not need an ENDSELECT statement
3) THE FULL KEY OF THE TABLE MUST BE INCLUDED IN
THE WHERE CLAUSE OF THE SELECT STATEMENT
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user632733 wrote:
I want to know difference between execute as statement and execute as script in Toad ..while i am running a query execute as statement is taking about 3 seconds and if i run with execute as a script its taking long time..Which one i need to consider.Firstly, this is not a TOAD forum. TOAD is a 3rd party tool developed by Quest Software, so really your question does not belong here.
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Difference between Select *    and Select single     ?

difference between Select *    and Select single     ?

HI,
DATA : IT TYPE TABLE OF MARA,
           WA TYPE MARA.
Here it selects all the record and keeps in internal table it.
Select * from mara into corresponding fields of table <b> it</b>.
Here it slects only one record that to first record.
If you wnat any specific record then use where condition.
Select single * from mara into corresponding fields of <b>wa</b>.
Message was edited by:
        Purshothaman P

How to measure time difference between zero crossing of a sine wave and rise time of a pulse on a same graph?

I have a 50Hz sine wave and a pulse signal on a same graph. The phase difference between two is between 0-90 degrees.
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Message Edited by awais.h on 03-30-2010 11:20 PM
Message Edited by awais.h on 03-30-2010 11:21 PM
Solved!
Go to Solution.

Hi
Thanks for the code but I'm afraid it won't work. Like you said the probability of choosing a value that is on both graphs may not happen. This is something that I would like the code to do automatically.
But I did use the previous code posted and made some modifications to it and it seems to work perfectly. Now the next thing is to be able to get just that one value that tells you the first time difference.
Here is what I get using that code.
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Here is the the code modified.
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Attachments:
FinalShockSpeed.vi ‏55 KB

Difference between select-option and range

Hi,
wat are the difference between select-option and range
where u have to use those and give the syntax for the range option.
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thanks
rams

Hi,
Not much of a difference,
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Oops just occured to me that you are using a 6009 which is not very fast, 48ks/sec, this will not get you very much time resolution and you could have issues seeing much of a 50 us sample. Another approach is to use the counter but you would have to preprocess the spikes to generate a trigger for the counter.
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Execution time difference between SELECT & UPDATE statement in JDBC Sender.

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