Closing connection, statement and ResultSet

Similar Questions

• So, how can I knowif and Windows Update has installed correctly. Because my computer closed connection or and I have to restart.

  Theres times that I am on my computer and I lose the connection and theres times I'm on facebook or a game. And I try to go up and down.  and stop it stops in the middle of a game or facebook. Sometimes it I see the line over and over again.

  Hi Jo AnnHerrera,.

  What browser do you use to play games?

  You can visit Windows update history to check the recently installed updates, failed.

  Check the update history to see what updates have been installed. Visit the below mentioned link.

  See the Windows updates are installed

  http://Windows.Microsoft.com/en-us/Windows7/see-which-Windows-updates-are-installed

  If you use Internet Explorer to play games, refer to the suggestions from this link.

  The problems of games online using Internet Explorer
  http://support.Microsoft.com/kb/2528246

  I hope this helps.

• Time of the value of a prepared statement and the differences in execution plan

  Hi guys... I have a doubt here that I was not able to specify the search on the internet.
  
  Is on prepared statements...
  
  When I do: con.prepareStatement (query);
  
  then the query is compiled and an execution plan is for this query on the database, I know. But what happens when I do con.close. Is the accessible yet statement caching other executions? to make this example:
  
  Suppose we are joining 20 tables and we have about 10 parameters for this query

  public ArrayList getData(String id1, String id2, String id 10) {       ArrayList response=new ArrayList();       Connection con=manager.getConnection();       String query="select name, phone, debtvalue, currency, etc from table1, table2, table3, table4, table20 where                           table1.id=table2.t1id and table2.id=table3.id and table2.fid=? and table1.fid=? and etc etc";//a big query       PreparedStatement pst=con.prepareStatement("select");       pst.setString (1, id1);       pst.setString (2, id2);       pst.setString (3, id3);       .       .       pst.setString (10, id10);       ResultSet rs=pst.executeQuery();       while (rs.next()) {               //do whatever and build the response ArrayList       }       rs.close();       pst.close();       return response; }

  Will be the compilation of the prepared statement and this execution plan is available for every performance of the getData method. Or a new plan of compilation and execution is calculated whenever I execute the method? Assuming that the running query takes a long time to maturity it its complexity and runs about 100 times a day in a production environment. It is advisable to use the prepared statement?
  
  Is the precompiled stuff avaible if I use a "" "NEW" "" said PreparedStatement with the same query?
  
  Thank you very much in advance for your answers...
  
  Published by: user4789473 on 25-mar-2013 17:14

  If you lose / close the statement prepared, Yes, you lose the ID. If you prepare again the same
  SQL, the DBMS must analyze the SQL code again, if to see if there is a query plan
  still/already existing for the DBMS session. According to the DBMS, it may or may not
  find/have/use plan, he created for the previous statement.

• Transaction after closed connection behavior?

  Hello
  
  Using JDBC, while doing multiple inserts in a transaction, this Exception was thrown:
  
  java.sql.SQLException: closed connection
  at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
  at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
  at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
  at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:873)
  at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:792)
  
  Accordingly, the commit() statement would have been forgotten, and the control went to a catch block where restoration has been attempted. With the connection being closed, this resulted in another Exception:
  
  java.sql.SQLException: closed connection
  at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
  at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
  at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
  at oracle.jdbc.driver.PhysicalConnection.rollback(PhysicalConnection.java:1170)
  
  If the transaction doesn't has been neither explicitly committed or rolledback by client code.
  
  The connection has been returned to the pool (which I suppose it thrown).
  
  The program then continues by obtaining a new connection from the pool. He began a new transaction with setAutoCommit (false) and started reading the data.
  
  Surprisingly he read the data written in the previous operation (I thought failed with clamp is closed by an external factor).
  
  The program has not changed isolation level transactions, so if I understand correctly, that is still the default value of READ_COMMITTED.
  
  I'm trying to understand what happened here. My understanding is that a local transaction occurs in a session and according to the JDBC docs, a connection is equivalent to a session. Yet, by the only explanation I can offer for the effects that I've seen, it's that here an be persisted between the two separate connections and the beginning of a transaction in the second connection resulted in the validation of the previous transaction half finished in the previously used connection.
  
  Is this possible? This kind of thing is documented anywhere?
  
  See you soon,.
  Derek

  Hello
  documentation (Oracle® Database JDBC Developer's Guide and reference chapter 3, Oracle version 10.2) stipulates that:

  If the autocommit mode is disabled and you close the connection without explicitly validate or restore your latest changes, then an implicit VALIDATION operation is performed.

  This corresponds to what you have observed.

  If you describe the libraries you use (es Spring AOP, plain JDBC, Hibernate, etc) I think that the forum users can proviode of the other suggestions/workarounds.

  Ciao,.
  Giovanni

• OfficeJet 8620 two problems one) Win7 firewall connection wifi and b) the printer multi-network

  Bought the printer this afternoon and set up a computer - connection to a printer with wifi as advised in the closed paper work and CD. No problems.

  When I put it in place of the second computer (with wifi) using the CD provided, I received an error message that the hp software can see the given IP address printer but he could not automatically connect using the "typical connection method. Tips in the dialog box has been to change the settings of firewall computer method of 'typical connection '. Any advice on what this might be. Looking at the Win7 firewall, all HP printer software are checked for the home network and the public. What else the firewall must Win7 allow to operate the automatic printer connection?  BTW, I followed the advice of the installation software and punted for the moment. The warning by the software that was if the printers IP address changes, I'll have to manually change it into the computer with the firewall issue (ugh).

  That leads to the second problem:

  A couple of my computers are ethernet only. No wifi. When I plug ethernet to the 8620, it defines an IP address for itself on ethernet, but he abandoned the wifi IP address. How can I feel some ethernet connected computers and some wifi connected ones.

  Any constructive advice is VERY WELCOME.

  I apologize in advance if there is already a solution posted either of these problems; I couldn't find searching them the forum.

  Lenny W.

  Hi lennyw07016,

  Thanks for letting me know that worked for you.

  I suggest the setting up of a static IP address. In this way the router will always assign the same IP address to the printer.

  Printer does not keep the wireless connection.

  Proceed to Solution 3: printer of the assign a static IP address.

  Here is a document for configuration of a firewall to allow a connection with the all-in-one Windows.

  You can check if you like.

  Thank you.

• Change the network connection speed and reliability of the emulator

  Hello

  I want to test my application in the State of the slow and unreliable network.

  I wonder if we can change the speed of the emulator network connection? Or y at - it a tool that can help us to do this?

  I'm also thinking about a simple proxy server which can regulate the speed of connection. And then my application connects to this server to test. This type of proxy server software exist?

  Thanks in advance

  Ball

  I think that the best you can do is play with simulation--> network coverage options - see the simulation on the Simulator menu.

• Exception of closed connection

  Hi all, I have an exception of connection closed when sending large volume of data ("large" means only > 150 bytes in our Protocol...).

  I have a problem with the Simulator, but when it is run on a BB 9000. I use SDK 4.6 and opening connection with

  (StreamConnection)Connector.open(_URL, Connector.READ_WRITE);
  

  Connection opens and all the success of small messages.

  I found the solution in this post http://supportforums.blackberry.com/rim/board/message?board.id=java_dev&message.id=28483&query.id=12...

  in which is supposed to OutputStream to write data (in the form of byte []) instead of OutputStreamWriter... it works! THIS MARKET!

  I think it is a bug in the API of OutputStreamWriter BB.

• Temporary internet connection interruption and error msg

  I am trying to download some PDF forms from a Web site, and whenever I click on the appropriate button to open the form page, the current page

  Gets closed their doors and the internet connection gets temporarily broken causing me to have to re - open up a new window.

  I have this experience also with trying to access government sites as well, but only occasionally, not all the time.

  My question is this:

  Do I have to download some sort of update to the software to allow me to download the necessary forms.

  And if so, which? and can you please provide me the link?

  Thank you.

  Hello
  Please follow the instructions below:

  When you install Acrobat or Adobe Reader on a system that includes a browser, you automatically configure the browser to open PDF files in the browser window. Acrobat and Adobe Reader install the ActiveX plugin files allow you to use Internet Explorer or AOL to open PDF files. If an application is installed, but do not open the PDF files in the browser window, then work through the following steps to configure the browser:

  Acrobat may not work correctly if the system does not meet the following requirements:

  • Intel Pentium III processor or equivalent
  • Microsoft Windows 2000 with Service Pack 4, Windows XP Professional, home edition or Edition Tablet PC with Service Pack 2
  • Microsoft Internet Explorer 6.0
  • 256 MB RAM (512 MB recommended)
  • 860 MB of available disk space; cache for optional installation files (recommended) requires 460 MB of additional free disk space.
  • screen resolution 1 024 x 768

  To open PDF files in a browser window, the ActiveX folder should contain the following files: AcroPDF.dll, AcroIEHelper.dll and pdfshell.dll.

  ActiveX controls must be in: program files Files\Adobe\Acrobat\ActiveX

  If one of these files is missing, then repair Acrobat or Adobe Reader by choosing Help > repair Acrobat Installation or reinstall the application.

  Make sure that you use a version of your web browser, Acrobat and Adobe Reader supports, such as Internet Explorer 6. Supported for Adobe Acrobat 8, Adobe Reader 8 browsers are Internet Explorer 6.0, 6.0 SP1, Internet Explorer 7.0, Firefox 1.5 or later, Mozilla 1.7 and AOL 9.

  To make sure that the Windows registry provides the information that your web browser should display PDF files, restart Windows. If the Windows registry is not updated after the installation of Acrobat, then the web browser can not find the references it needs to access the PDF files on the web.

  If you have an older version of Acrobat or Adobe Reader is installed on the system, and then use the Add / Remove programs in Windows to remove it.

  If you use Acrobat, and then repair or replace the damaged or missing files by using the repair feature the Installation of Acrobat or the dialog box add or remove programs.

  To repair Acrobat:

  1. Choose Start > Control Panel.
  2. Double-click Add or remove programs.
  3. Select Acrobat and then click on edit.
  4. Follow the on-screen instructions to repair the Acrobat.

  7 reinstall Acrobat or Adobe Reader.

  To ensure that the correct information of the plug-in is added to the Windows registry, reinstall Acrobat or Adobe Reader.

  If you want the browser to open PDFs in a separate Acrobat window, then configure the browser to use Acrobat or Adobe Reader as a helper application. Then, when you select a PDF file in Internet Explorer or AOL, the browser opens the PDF file in an Acrobat window instead of the browser window.

  To configure the browser to use Acrobat or Adobe Reader to open PDF files:

  1. Close your web browser.
  2. Start Acrobat or Adobe Reader.
  3. Choose Edition > Preferences.
  4. Select Internet from the list on the left.
  5. Deselect Display PDF in browser, and then click OK.
  6. Restart Internet Explorer or AOL.

  Note: The next time you select a link to a file PDF, the browser may ask you to open or save the file. If you choose to open the file, then the browser opens the file in the support application that you specified. If you choose to save the file, the browser downloads the file to the hard drive.

• Understanding "CONNECT BY" and "START WITH".

  OK, I'm trying to update the rows with values determined by lines joined in a recursive relationship of unknown depth. I am told that "CONNECT BY" and "START WITH" can be useful in this, but I don't see how to get the value I'm looking for.
  
  In my case, there are 3 values in my table.
  ID
  ID of the parent
  Invoice
  
  On some lines, the Bill is null. For records, you get the ID of the invoice by searching for the invoice of the parent folder. I'm trying to update the table so that all THE rows in the table have an ID of invoice.
  
  Here is an example of table and the lines.
  

  CREATE TABLE DISTRIBUTION (
  ID            INT,
  INV_NUM       INT,
  PARENT_ID     INT
  )
  
  INSERT INTO DISTRIBUTION 1, 111, NULL;
  INSERT INTO DISTRIBUTION 2, 112, NULL;
  INSERT INTO DISTRIBUTION 3, NULL, 2;
  INSERT INTO DISTRIBUTION 4, 113, NULL;
  INSERT INTO DISTRIBUTION 5, NULL, 4;
  INSERT INTO DISTRIBUTION 6, NULL, 5;
  INSERT INTO DISTRIBUTION 7, NULL, 6;

  What I would do is update the inv_num column in the table so that a select statement * would look like this...
  

  ID        INV_NUM    PARENT_ID
  -----     -------------     ---------------
  1            111           null
  2            112           null
  3            112              2
  4            113           null
  5            113              4
  6            113              5
  7            113              6

  You can provide any help would be greatly appreciated.

  Hello

  Thank you post the CREATE TABLE and INSERT instructions, but please make sure that they work.
  None of the INSERT statements; I think you meant something like the statements shown after the query.

  Here's a way to get the desired results:

  UPDATE  distribution     m
  SET     inv_num = ( SELECT  inv_num
                FROM    distribution
                WHERE   CONNECT_BY_ISLEAF     = 1
                START WITH     id          = m.id
                CONNECT BY     id          = PRIOR parent_id
                         AND     PRIOR inv_num     IS NULL
                 )
  WHERE   inv_num       IS NULL
  ;
  

  This statement is Bottom-Up of subqueries, where we START WITH the lines that need to update, and process to the top of the tree, until you get to an ancestor who was an inv_num.
  In your sample data, only the roots (the lines that have no parents) have inv_num. In this case, it might be a little easier (but only a little) to make a request from top to bottom , where we START WITH the roots and low process in the tree to find their subordinates.
  If we add some data examples where a nonroot has inv_num:

  INSERT INTO DISTRIBUTION (id, inv_num, parent_id) VALUES ( 91, 910,   1);
  INSERT INTO DISTRIBUTION (id, inv_num, parent_id) VALUES ( 92, NULL, 91);
  

  What results would you like?
  Using the UPDATE statement above, id = 92 would get his inv_nuym of the closest ancestor (in the case of thios, parent) who had an inv_num:

  .       ID    INV_NUM  PARENT_ID
  ---------- ---------- ----------
           1        111
          91        910          1
          92        910         91
           2        112
           3        112          2
           4        113
           5        113          4
           6        113          5
           7        113          6
  

  Either the row with id = 92 gets inv_num = 910, no 111.

• I live in the United States and would like to buy a song from the Germany. Is this Possible?

  I live in the United States and would like to buy a song from the Germany. Is this possible?

  Hello

  You can buy songs that are available on iTunes Store for your country.

• When I close firefox it tells me that I am closing multiple tabs. and will not let me save them. the only option is to cancel or OK.

  This has just begun. When I close firefox it tells me that I am closing multiple tabs. and will not let me save them. the only option is to cancel or OK. When I say OK and restart Firefox all my tabs go :-( This happens every time now. I know how to recover my old tabs but whenever I close Firefox it always warns me that I'm closing multiple tabs.

  Tanks for help getting Firefox working properly again
  Jim

  Do not use 'Clear history of Firefox closing' to clear the 'browsing history '.

  • Tools > Options > Privacy: history: [X] clear history of Firefox closing > settings
  • https://support.Mozilla.org/KB/clear+recent+history

  Using the "Show my windows and tabs from last time" is a more reliable way to restore the session data.

  • Tools > Options > general > startup: "When Firefox starts": "show my windows and tabs from last time '.

• Tecra M4 Tablet is underspecced compared to the United States and France

  I want to buy a Tecra M4 tablet. The main reasons are: optical drive, with a resolution SXGA + and a good graphics chip.

  Toshiba saw fit to make us pay more than the United States and France for a laptop with only 1.73 Ghz, 60 GB hard drive, Combo DVD/CD-RW a skinny nVidia 6200 with 64 MB of ram.

  In the United States they may have 2.13 Ghz, tickets (+ R double layer), hard drive 80 GB and nVidia 6600 GPU with 128 MB of ram. All for less than what we are paying for our pathetic version.

  Because they do not give us a DVD burner, those who need to make restore disks will have 6-7 CD - R. Who can be bothered and dealing with that many discs.

  Toshiba you have really disappointed me. Re-enter your.

  I agree but I still love my M4.

• I have several purchases through the iTunes Store on my bank statement and I don't know what they are for. Can you help me? Cannot maneuver through this system to see the purchase history.

  I have several iTunes Store purchases that appear on my bank statement and I don't know what they are for. Can you help me? I'm unable to maneuver through this system to view previous purchases.  I wonder if I pay for extra storage, it is always advising me that I'm pretty sure.

  Hello

  Open iTunes on your Mac and click your name (if you are not signed in, then sign to see your name). Then click on account information. Once you enter the account information screen, you will see a section called historical of purchases. Click 'View all' to see the list of purchases and the ability to watch the dates more.

  See you soon,.

  GB

• WiFi loses connection intermittently and the erasure of the arp arranges

  This has been asked before many times, but none of the above worked for me so far.

  I have a MacBook Pro with El Capitan on it. From time to time, usually 5 to 10 minutes,

  my connection drops and I can browse the internet. As:

  4 bytes of 8.8.8.8: icmp_seq = 7646 ttl = 53 time = 13,091 ms

  64 bytes of 8.8.8.8: icmp_seq = 7647 ttl = 53 time = 17,035 ms

  64 bytes of 8.8.8.8: icmp_seq = 7648 ttl = 53 time = ms 13,716

  Request timeout for icmp_seq 7649

  Request timeout for icmp_seq 7650

  Request timeout for icmp_seq 7651

  Request timeout for icmp_seq 7652

  Request timeout for icmp_seq 7653

  Request timeout for icmp_seq 7654

  Shooting, then turn on the WiFi will fix the problem, but I tried to limit the problem

  and I discovered that deleting IP of the route in the arp table will also fix connectivity

  immediately:

  $ sudo arp d 192.168.0.1

  Request timeout for icmp_seq 7718

  Request timeout for icmp_seq 7719

  Request timeout for icmp_seq 7720

  64 bytes of 8.8.8.8: icmp_seq = 7721 ttl = 53 time = 10,947 ms

  64 bytes of 8.8.8.8: icmp_seq = 7722 ttl = time 53 = 11,966 ms

  64 bytes of 8.8.8.8: icmp_seq = 7723 ttl = 53 time = 12,576 ms

  64 bytes of 8.8.8.8: icmp_seq = 7724 ttl = time 53 = 11,058 ms

  64 bytes of 8.8.8.8: icmp_seq = 7725 ttl = 53 time = 15,173 ms

  Deactivation of unicast arp has NO had no effect either:

  $ sudo sysctl-w net.link.ether.inet.arp_unicast_lim = 0

  Notes:

  -J' have two MacBook Pro at home. Other works without problem.

  -My phone and other devices work also with the same router with no problems.

  -The problematic MacBook works with other WiFi networks without any problem.

  What could be the problem?

  Yes, clear arp fix it. Very familiar with it.

  I had this problem for 2 years and more than 2 or 3 MacBooks, on El Capitan, Yosemite, and Mavericks.   I Googled it every 1-2 years months.  I captured packets and tested several access points... The best fix so far... is the arp compensation, and I have the automated at the moment:

  in a terminal:

  While true; make sudo arp - da; sleep 2; fact

  When the window is open, every 2 seconds, my arp table gets undervalued... and if I lose connectivity, the maximum cut is 1 to 2 seconds.

  I noticed that in some places, I don't have the problem... its as if my laptop reacts badly to some other customers on the same WIFI network.  This question makes me crazy, and I can't imagine how was such years.  If I don't fix it manually, I find myself for 30-120 seconds every few minutes.

• I received spam messages supposed to come from Paypal. I closed the account and block the associated map in case. However, I was recommended by Paypal to check my iphone and Ipad if no virus of these emails infected by the devices. How? Thank you

  anti-spam messages expected to come from Paypal. I closed the account and block the associated map in case. However, I was recommended by Paypal to check my iphone and Ipad if no virus of these emails infected by the devices. How? Thank you

  Unless you have jailbroken your iOS devices, there are no viruses that can infect them. Sounds like PayPal tries to return the ball.