Need help with database retrieval

This is the code im using to get a column from my database and display its contents into a JTextArea but for some reason it says this in the msdos box
Sending query: SELECT *
FROM words;
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Invalid characte
r value for cast specification on column number 1 (MoreThings)
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6879)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7036)
at sun.jdbc.odbc.JdbcOdbc.SQLGetDataInteger(JdbcOdbc.java:3766)
at sun.jdbc.odbc.JdbcOdbcResultSet.getDataInteger(JdbcOdbcResultSet.java
:5501)
at sun.jdbc.odbc.JdbcOdbcResultSet.getInt(JdbcOdbcResultSet.java:567)
at WhiteBoardServer.displayField(WhiteBoardServer.java:423)
at WhiteBoardServer.getWords(WhiteBoardServer.java:406)
at WhiteBoardServer.<init>(WhiteBoardServer.java:43)
at WhiteBoardServer.main(WhiteBoardServer.java:490)
Query successful
And this is the code i used for retieving the information
public void getWords()
try
Statement statement = dbConnection.createStatement();
String query = "SELECT * FROM words";
System.out.println("\nSending query: " + dbConnection.nativeSQL( query ) + "\n" );
ResultSet rs = statement.executeQuery( query );
displayField( rs );
System.out.println( "\nQuery successful\n" );
statement.close();
catch ( SQLException sqlex )
sqlex.printStackTrace();
// Method to display the data from the database for tab1
public void displayField( ResultSet rs )
try
rs.next();
int recordNumber = rs.getInt( 1 );
if ( recordNumber != 0 )
generateT.setText( rs.getString( 1 ) );
else{}
catch ( SQLException sqlex )
sqlex.printStackTrace();
// output.append( sqlex.toString() );
Any help is appreciated

1. Don't do 'SELECT *' it's yucky, and you never know what your gonna get.
2. In one point you are doing getInt and two lines later you are doing setString, on the same column. I think the driver is asking you to make up your mind.

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    17. Please describe the shape of one of your typical documents? Please
    do this by sending us a skeleton XML document.
    Due to the sensitive nature of the data, I can provide XML schema instead.
    18. What is the rate of document insertion/update required or
    expected? Are you doing partial node updates (via XmlModify) or
    replacing the document?
    The document is inserted during user login. Any change made to the application
    data grid or other data components gets saved in Berkeley DB. We also have
    an automatic save every two minutes. The final save from the application
    gets saved in a relational database.
    19. What is the query rate required/expected?
    Users will not be entering data rapidly. There will be lot of think time
    before the users enter/modify data in the web application. This is a pilot
    project but when we go live with this application, we will expect 25 users
    at the same time.
    20. XQuery -- supply some sample queries
    1. Please provide the Query Plan
    2. Are you using DBXML_INDEX_NODES?
    Yes.
    3. Display the indices you have defined for the specific query.
         XmlIndexSpecification spec = container.getIndexSpecification();
         // ids
         spec.addIndex("", "id", XmlIndexSpecification.PATH_NODE | XmlIndexSpecification.NODE_ATTRIBUTE | XmlIndexSpecification.KEY_EQUALITY, XmlValue.STRING);
         spec.addIndex("", "idref", XmlIndexSpecification.PATH_NODE | XmlIndexSpecification.NODE_ATTRIBUTE | XmlIndexSpecification.KEY_EQUALITY, XmlValue.STRING);
         // index to cover AttributeValue/Description
         spec.addIndex("", "Description", XmlIndexSpecification.PATH_EDGE | XmlIndexSpecification.NODE_ELEMENT | XmlIndexSpecification.KEY_SUBSTRING, XmlValue.STRING);
         // cover AttributeValue/@value
         spec.addIndex("", "value", XmlIndexSpecification.PATH_EDGE | XmlIndexSpecification.NODE_ATTRIBUTE | XmlIndexSpecification.KEY_EQUALITY, XmlValue.STRING);
         // item attribute values
         spec.addIndex("", "type", XmlIndexSpecification.PATH_EDGE | XmlIndexSpecification.NODE_ATTRIBUTE | XmlIndexSpecification.KEY_EQUALITY, XmlValue.STRING);
         // default index
         spec.addDefaultIndex(XmlIndexSpecification.PATH_NODE | XmlIndexSpecification.NODE_ELEMENT | XmlIndexSpecification.KEY_EQUALITY, XmlValue.STRING);
         spec.addDefaultIndex(XmlIndexSpecification.PATH_NODE | XmlIndexSpecification.NODE_ATTRIBUTE | XmlIndexSpecification.KEY_EQUALITY, XmlValue.STRING);
         // save the spec to the container
         XmlUpdateContext uc = xmlManager.createUpdateContext();
         container.setIndexSpecification(spec, uc);
    4. If this is a large query, please consider sending a smaller
    query (and query plan) that demonstrates the problem.
    21. Are you running with Transactions? If so please provide any
    transactions flags you specify with any API calls.
    Yes. READ_UNCOMMITED in some and READ_COMMITTED in other transactions.
    22. If your application is transactional, are your log files stored on
    the same disk as your containers/databases?
    Yes.
    23. Do you use AUTO_COMMIT?
         No.
    24. Please list any non-transactional operations performed?
    No.
    25. How many threads of control are running? How many threads in read
    only mode? How many threads are updating?
    We use Berkeley XML DB within the context of a struts web application.
    Each user logged into the web application will be running a bdb transactoin
    within the context of a struts action thread.
    26. Please include a paragraph describing the performance measurements
    you have made. Please specifically list any Berkeley DB operations
    where the performance is currently insufficient.
    We are clocking 10-12 seconds of loading a document from dbd when
    five users are on the system.
    getContainer().getDocument(documentName);
    27. What performance level do you hope to achieve?
    We would like to get less than 5 seconds when 25 users are on the system.
    28. Please send us the output of the following db_stat utility commands
    after your application has been running under "normal" load for some
    period of time:
    % db_stat -h database environment -c
    % db_stat -h database environment -l
    % db_stat -h database environment -m
    % db_stat -h database environment -r
    % db_stat -h database environment -t
    (These commands require the db_stat utility access a shared database
    environment. If your application has a private environment, please
    remove the DB_PRIVATE flag used when the environment is created, so
    you can obtain these measurements. If removing the DB_PRIVATE flag
    is not possible, let us know and we can discuss alternatives with
    you.)
    If your application has periods of "good" and "bad" performance,
    please run the above list of commands several times, during both
    good and bad periods, and additionally specify the -Z flags (so
    the output of each command isn't cumulative).
    When possible, please run basic system performance reporting tools
    during the time you are measuring the application's performance.
    For example, on UNIX systems, the vmstat and iostat utilities are
    good choices.
    Will give this information soon.
    29. Are there any other significant applications running on this
    system? Are you using Berkeley DB outside of Berkeley DB XML?
    Please describe the application?
    No to the first two questions.
    The web application is an online review of test questions. The users
    login and then review the items one by one. The relational database
    holds the data in xml. During application load, the application
    retrieves the xml and then saves it to bdb. While the user
    is making changes to the data in the application, it writes those
    changes to bdb. Finally when the user hits the SAVE button, the data
    gets saved to the relational database. We also have an automatic save
    every two minues, which saves bdb xml data and saves it to relational
    database.
    Thanks,
    Madhav
    [email protected]

    Could it be that you simply do not have set up indexes to support your query? If so, you could do some basic testing using the dbxml shell:
    milu@colinux:~/xpg > dbxml -h ~/dbenv
    Joined existing environment
    dbxml> setverbose 7 2
    dbxml> open tv.dbxml
    dbxml> listIndexes
    dbxml> query     { collection()[//@date-tip]/*[@chID = ('ard','zdf')] (: example :) }
    dbxml> queryplan { collection()[//@date-tip]/*[@chID = ('ard','zdf')] (: example :) }Verbosity will make the engine display some (rather cryptic) information on index usage. I can't remember where the output is explained; my feeling is that "V(...)" means the index is being used (which is good), but that observation may not be accurate. Note that some details in the setVerbose command could differ, as I'm using 2.4.16 while you're using 2.4.13.
    Also, take a look at the query plan. You can post it here and some people will be able to diagnose it.
    Michael Ludwig

  • Need Help With File Matching Records

    I need help with my file matching program.
    Here is how it suppose to work: FileMatch class should contain methods to read oldmast.txt and trans.txt. When a match occurs (i.e., records with the same account number appear in both the master file and the transaction file), add the dollar amount in the transaction record to the current balance in the master record, and write the "newmast.txt" record. (Assume that purchases are indicated by positive amounts in the transaction file and payments by negative amounts.)
    When there is a master record for a particular account, but no corresponding transaction record, merely write the master record to "newmast.txt". When there is a transaction record, but no corresponding master record, print to a log file the message "Unmatched transaction record for account number ..." (fill in the account number from the transaction record). The log file should be a text file named "log.txt".
    Here is my following program code:
    // Exercise 14.8: CreateTextFile.java
    // creates a text file
    import java.io.FileNotFoundException;
    import java.lang.SecurityException;
    import java.util.Formatter;
    import java.util.FormatterClosedException;
    import java.util.NoSuchElementException;
    import java.util.Scanner;
    import org.egan.AccountRecord;
    import org.egan.TransactionRecord;
    public class CreateTextFile
      private Formatter output1;  // object used to output text to file
      private Formatter output2;  // object used to output text to file
      // enable user to open file
      public void openTransFile()
        try
          output1 = new Formatter("trans.txt");
        catch (SecurityException securityException)
          System.err.println("You do not have write access to this file.");
          System.exit(1);
        } // end catch
        catch (FileNotFoundException filesNotFoundException)
          System.err.println("Error creating file.");
          System.exit(1);
      } // end method openTransFile
      // enable user to open file
      public void openOldMastFile()
        try
          output2 = new Formatter("oldmast.txt");
        catch (SecurityException securityException)
          System.err.println("You do not have write access to this file.");
          System.exit(1);
        } // end catch
        catch (FileNotFoundException filesNotFoundException)
          System.err.println("Error creating file.");
          System.exit(1);
      } // end method openOldMastFile
      // add transaction records to file
      public void addTransactionRecords()
        // object to be written to file
        TransactionRecord record1 = new TransactionRecord();
        Scanner input1 = new Scanner(System.in);
        System.out.printf("%s\n%s\n%s\n%s\n\n",
          "To terminate input, type the end-of-file indicator",   
          "when you are prompted to enter input.",
          "On UNIX/Linux/Mac OS X type <ctrl> d then press Enter",
          "On Windows type <ctrl> z then press Enter");
        System.out.printf("%s\n%s",
           "Enter account number (> 0) and amount.","? ");
        while (input1.hasNext())  // loop until end-of-file indicator
          try // output values to file
            // retrieve data to be output
            record1.setAccount(input1.nextInt());    // read account number
            record1.setAmount(input1.nextDouble());  // read amount
            if (record1.getAccount() > 0)
              // write new record
              output1.format("%d %.2f\n", record1.getAccount(), record1.getAmount());
            } // end if
            else
              System.out.println("Account number must be greater than 0.");
            } // end else
          } // end try
          catch (FormatterClosedException formatterClosedException)
            System.err.println("Error writing to file.");
            return;
          } // end catch
          catch (NoSuchElementException elementException)
            System.err.println("Invalid input. Please try again.");
            input1.nextLine(); // discard input so user can try again
          } // end catch
          System.out.printf("%s %s\n%s", "Enter account number (> 0) ",
            "and amount.","? ");
        } // end while
      } // end method addTransactionRecords
      // add account records to file
      public void addAccountRecords()
        // object to be written to file
        AccountRecord record2 = new AccountRecord();
        Scanner input2 = new Scanner(System.in);
        System.out.printf("%s\n%s\n%s\n%s\n\n",
          "To terminate input, type the end-of-file indicator",   
          "when you are prompted to enter input.",
          "On UNIX/Linux/Mac OS X type <ctrl> d then press Enter",
          "On Windows type <ctrl> z then press Enter");
        System.out.printf("%s\n%s",
           "Enter account number (> 0), first name, last name and balance.","? ");
        while (input2.hasNext())  // loop until end-of-file indicator
          try // output values to file
            // retrieve data to be output
            record2.setAccount(input2.nextInt());    // read account number
            record2.setFirstName(input2.next());      // read first name
            record2.setLastName(input2.next());       // read last name
            record2.setBalance(input2.nextDouble());  // read balance
            if (record2.getAccount() > 0)
              // write new record
              output2.format("%d %s %s %.2f\n", record2.getAccount(), record2.getFirstName(),
                record2.getLastName(), record2.getBalance());
            } // end if
            else
              System.out.println("Account number must be greater than 0.");
            } // end else
          } // end try
          catch (FormatterClosedException formatterClosedException)
            System.err.println("Error writing to file.");
            return;
          } // end catch
          catch (NoSuchElementException elementException)
            System.err.println("Invalid input. Please try again.");
            input2.nextLine(); // discard input so user can try again
          } // end catch
          System.out.printf("%s %s\n%s", "Enter account number (> 0),",
            "first name, last name and balance.","? ");
        } // end while
      } // end method addAccountRecords
      // close file
      public void closeTransFile()
        if (output1 != null)
          output1.close();
      } // end method closeTransFile
      // close file
      public void closeOldMastFile()
        if (output2 != null)
          output2.close();
      } // end method closeOldMastFile
    } // end class CreateTextFile--------------------------------------------------------------------------------------------------
    // Exercise 14.8: CreateTextFileTest.java
    // Testing class CreateTextFile
    public class CreateTextFileTest
       // main method begins program execution
       public static void main( String args[] )
         CreateTextFile application = new CreateTextFile();
         application.openTransFile();
         application.addTransactionRecords();
         application.closeTransFile();
         application.openOldMastFile();
         application.addAccountRecords();
         application.closeOldMastFile();
       } // end main
    } // end class CreateTextFileTest-------------------------------------------------------------------------------------------------
    // Exercise 14.8: TransactionRecord.java
    // A class that represents on record of information
    package org.egan; // packaged for reuse
    public class TransactionRecord
      private int account;
      private double amount;
      // no-argument constructor calls other constructor with default values
      public TransactionRecord()
        this(0,0.0); // call two-argument constructor
      } // end no-argument AccountRecord constructor
      // initialize a record
      public TransactionRecord(int acct, double amt)
        setAccount(acct);
        setAmount(amt);
      } // end two-argument TransactionRecord constructor
      // set account number
      public void setAccount(int acct)
        account = acct;
      } // end method setAccount
      // get account number
      public int getAccount()
        return account;
      } // end method getAccount
      // set amount
      public void setAmount(double amt)
        amount = amt;
      } // end method setAmount
      // get amount
      public double getAmount()
        return amount;
      } // end method getAmount
    } // end class TransactionRecord -------------------------------------------------------------------------------------------------
    // Exercise 14.8: AccountRecord.java
    // A class that represents on record of information
    package org.egan; // packaged for reuse
    import org.egan.TransactionRecord;
    public class AccountRecord
      private int account;
      private String firstName;
      private String lastName;
      private double balance;
      // no-argument constructor calls other constructor with default values
      public AccountRecord()
        this(0,"","",0.0); // call four-argument constructor
      } // end no-argument AccountRecord constructor
      // initialize a record
      public AccountRecord(int acct, String first, String last, double bal)
        setAccount(acct);
        setFirstName(first);
        setLastName(last);
        setBalance(bal);
      } // end four-argument AccountRecord constructor
      // set account number
      public void setAccount(int acct)
        account = acct;
      } // end method setAccount
      // get account number
      public int getAccount()
        return account;
      } // end method getAccount
      // set first name
      public void setFirstName(String first)
        firstName = first;
      } // end method setFirstName
      // get first name
      public String getFirstName()
        return firstName;
      } // end method getFirstName
      // set last name
      public void setLastName(String last)
        lastName = last;
      } // end method setLastName
      // get last name
      public String getLastName()
        return lastName;
      } // end method getLastName
      // set balance
      public void setBalance(double bal)
        balance = bal;
      } // end method setBalance
      // get balance
      public double getBalance()
        return balance;
      } // end method getBalance
      // combine balance and amount
      public void combine(TransactionRecord record)
        balance = (getBalance() + record.getAmount()); 
      } // end method combine
    } // end class AccountRecord -------------------------------------------------------------------------------------------------
    // Exercise 14.8: FileMatch.java
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.lang.IllegalStateException;
    import java.util.NoSuchElementException;
    import java.util.Scanner;
    import java.util.Formatter;
    import java.util.FormatterClosedException;
    import org.egan.AccountRecord;
    import org.egan.TransactionRecord;
    public class FileMatch
      private Scanner inTransaction;
      private Scanner inOldMaster;
      private Formatter outNewMaster;
      private Formatter theLog;
      // enable user to open file
      public void openTransFile()
        try
          inTransaction = new Scanner(new File("trans.txt"));
        } // end try
        catch (FileNotFoundException fileNotFoundException)
          System.err.println("Error opening file.");
          System.exit(1);
        } // end catch
      } // end method openTransFile
      // enable user to open file
      public void openOldMastFile()
        try
          inOldMaster = new Scanner(new File("oldmast.txt"));
        } // end try
        catch (FileNotFoundException fileNotFoundException)
          System.err.println("Error opening file.");
          System.exit(1);
        } // end catch
      } // end method openOldMastFile
      // enable user to open file
      public void openNewMastFile()
        try
          outNewMaster = new Formatter("newmast.txt");
        catch (SecurityException securityException)
          System.err.println("You do not have write access to this file.");
          System.exit(1);
        } // end catch
        catch (FileNotFoundException filesNotFoundException)
          System.err.println("Error creating file.");
          System.exit(1);
      } // end method openNewMastFile
      // enable user to open file
      public void openLogFile()
        try
          theLog = new Formatter("log.txt");
        catch (SecurityException securityException)
          System.err.println("You do not have write access to this file.");
          System.exit(1);
        } // end catch
        catch (FileNotFoundException filesNotFoundException)
          System.err.println("Error creating file.");
          System.exit(1);
      } // end method openLogFile
      // update records
      public void updateRecords()
        TransactionRecord transaction = new TransactionRecord();
        AccountRecord account = new AccountRecord();
        try // read records from file using Scanner object
          System.out.println("Start file matching.");
          while (inTransaction.hasNext() && inOldMaster.hasNext())
            transaction.setAccount(inTransaction.nextInt());     // read account number
            transaction.setAmount(inTransaction.nextDouble());   // read amount
            account.setAccount(inOldMaster.nextInt());     // read account number
            account.setFirstName(inOldMaster.next());      // read first name 
            account.setLastName(inOldMaster.next());       // read last name
            account.setBalance(inOldMaster.nextDouble());  // read balance
            if (transaction.getAccount() == account.getAccount())
              while (inTransaction.hasNext() && transaction.getAccount() == account.getAccount())
                account.combine(transaction);
                outNewMaster.format("%d %s %s %.2f\n",
                account.getAccount(), account.getFirstName(), account.getLastName(),
                account.getBalance());
                transaction.setAccount(inTransaction.nextInt());     // read account number
                transaction.setAmount(inTransaction.nextDouble());   // read amount
            else if (transaction.getAccount() != account.getAccount())
              outNewMaster.format("%d %s %s %.2f\n",
              account.getAccount(), account.getFirstName(), account.getLastName(),
              account.getBalance());         
              theLog.format("%s%d","Unmatched transaction record for account number ",transaction.getAccount());
          } // end while
          System.out.println("Finish file matching.");
        } // end try
        catch (NoSuchElementException elementException)
          System.err.println("File improperly formed.");
          inTransaction.close();
          inOldMaster.close();
          System.exit(1);
        } // end catch
        catch (IllegalStateException stateException)
          System.err.println("Error reading from file.");
          System.exit(1);
        } // end catch   
      } // end method updateRecords
      // close file and terminate application
      public void closeTransFile()
        if (inTransaction != null)
          inTransaction.close();
      } // end method closeTransFile
      // close file and terminate application
      public void closeOldMastFile()
        if (inOldMaster != null)
          inOldMaster.close();
      } // end method closeOldMastFile
      // close file
      public void closeNewMastFile()
        if (outNewMaster != null)
          outNewMaster.close();
      } // end method closeNewMastFile
      // close file
      public void closeLogFile()
        if (theLog != null)
          theLog.close();
      } // end method closeLogFile
    } // end class FileMatch-------------------------------------------------------------------------------------------------
    // Exercise 14.8: FileMatchTest.java
    // Testing class FileMatch
    public class FileMatchTest
       // main method begins program execution
       public static void main( String args[] )
         FileMatch application = new FileMatch();
         application.openTransFile();
         application.openOldMastFile();
         application.openNewMastFile();
         application.openLogFile();
         application.updateRecords();
         application.closeLogFile();
         application.closeNewMastFile();
         application.closeOldMastFile();
         application.closeTransFile();
       } // end main
    } // end class FileMatchTest-------------------------------------------------------------------------------------------------
    Sample data for master file:
    Master file                         
    Account Number            Name                     Balance
    100                            Alan Jones                   348.17
    300                            Mary Smith                    27.19
    500                            Sam Sharp                   0.00
    700                            Suzy Green                   -14.22Sample data for transaction file:
    Transaction file                    Transaction
    Account Number                  Amount
    100                                         27.14
    300                                         62.11
    300                                         83.89
    400                                         100.56
    700                                         80.78
    700                                         1.53
    900                                         82.17  -------------------------------------------------------------------------------------------------
    My FileMatch class program above has bugs in it.
    The correct results for the newmast.txt:
    100  Alan  Jones  375.31
    300  Mary  Smith  173.19
    500  Sam  Sharp  0.00
    700  Suzy Green  68.09The correct results for the log.txt:
    Unmatched transaction record for account number 400Unmatched transaction record for account number 900------------------------------------------------------------------------------------------------
    My results for the newmast.txt:
    100 Alan Jones 375.31
    300 Mary Smith 111.08
    500 Sam Sharp 0.00
    700 Suzy Green -12.69My results for the log.txt
    Unmatched transaction record for account number 700-------------------------------------------------------------------------------------------------
    I am not sure what is wrong with my code above to make my results different from the correct results.
    Much help is appreciated. Please help.

    From the output, it looks like one problem is just formatting -- apparently you're including a newline in log entries and not using tabs for the newmast output file.
    As to why the numbers are off -- just from glancing over it, it appears that the problem is when you add multiple transaction values. Since account.combine() is so simple, I suspect that you're either adding creating transaction objects incorrectly or not creating them when you should be.
    Create test input data that isolates a single case of this (e.g., just the Mary Smith case), and then running your program in a debugger or adding debugging code to the add/combine method, so you can see what's happening in detail.
    Also I'd recommend reconsidering your design. It's a red flag if a class has a name with "Create" in it. Classes represent bundles of independant state and transformations on that state, not things to do.

  • Need help with the session state value items.

    I need help with the session state value items.
    Trigger is created (on After delete, insert action) on table A.
    When insert in table B at least one row, then trigger update value to 'Y'
    in table A.
    When delete all rows from a table B,, then trigger update value to 'N'
    in table A.
    In detail report changes are visible, but the trigger replacement value is not set in session value.
    How can I implement this?

    You'll have to create a process which runs after your database update process that does a query and loads the result into your page item.
    For example
    SELECT YN_COLUMN
    FROM My_TABLE
    INTO My_Page_Item
    WHERE Key_value = My_Page_Item_Holding_Key_ValueThe DML process will only return key values after updating, such as an ID primary key updated by a sequence in a trigger.
    If the value is showing in a report, make sure the report refreshes on reload of the page.
    Edited by: Bob37 on Dec 6, 2011 10:36 AM

  • I need help with oracle

    Hi,
    I need some help... if someone can help its great.
    I need to make a statement in Oracle SQL that read data from a file and insert in a Oracle Database ... if someone can show me the syntax of it i appreciate..
    Thanks

    Okay, I see you followed the advice in that other thread and started a new post for you question. Congratulations. Your next lesson in forum etiquette is to give your posts a more relevant subject. Pretty much everybody who posts here needs help with oracle; if they need help with cooking catfish they've come to the wrong place.
    It that other thread I suggested using SQL*Loader or External Tables might be a more suitable solution. Find out more.
    Cheers, APC

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