Jdbc driver creates new thread for each statement with a query timeout set

I am profiling a web application that is using the Microsoft JDBC driver, version 1.1 to connect to a sql server 2005 database. Each java.sql.Statement that is created, within the application, gets a query timeout value set on it ( statement.setQueryTimeout(...) ).
I have discovered that the JDBC driver creates a new thread to monitor each Statement and the query timeout value. When the application is under load these threads are getting created faster then they are being destroyed and I am concerned that this will cause a performance problem in production.
One option I have is to remove the query timeout value and the monitor threads will not be created, another is to change JDBC drivers.
I'm curious is there any way to control this behavior so that these threads are not created or are managed more efficiently. Is there a workaround that anyone is aware of? Is this considered a bug?
I have found a similar bug here for the 2000 driver:
http://support.microsoft.com/default.aspx/kb/894552
Cheers

Hi,
Thank you for using the Microsoft SQL Server JDBC driver. You are correct that a new thread is started to monitor the query timeout when a statement is executed. This is a potential performance issue that we may look at addressing in the upcoming v1.2 release. The current behavior is not configurable. The only workaround with the v1.1 driver is to limit your use of query timeouts to only those statements which you reasonably might expect to actually time out.
We do take customer feedback very seriously, so if anyone else is concerned about this particular issue, please chime in and we will be able to give it appropriate weight.
--David Olix [MSFT]

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FillBy always fills in the same row in data grid view. How to make it fill in a new row for each click of the Fillby Button? VB 2010 EXPRESS?

Hi there,
I am a beginner in Visual Basic Express 2010. I have a Point of Sale program that uses DataGridView to display records from an external microsoft access
database using the fillby query.
It works, but it repopulates the same row each time, but i want to be able to display multiple records at the same time, a new row should be filled for
each click of the fillby button.
also I want to be able to delete any records if the customer suddenly decides to not buy an item after it has already been entered.
so actually 2 questions here:
1. how to populate a new row for each click of the fillby button
2. how to delete records from data grid view after an item has been entered
Thanks
Vishwas

Hello,
The FillBy method loads data according to what the results are from the SELECT statement, so if there is one row then you get one row in the DataGridView, have two rows then two rows show up.
Some examples
Form load populates our dataset with all data as it was defined with a plain SELECT statement. Button1 loads via a query I created after the fact to filter on a column, the next button adds a new row to the existing data. When adding a new row it is appended
to the current data displayed and the primary key is a negative value but the new key is shown after pressing the save button on the BindingNavigator or there are other ways to get the new key by manually adding the row to the backend table bypassing the Adapter.
The following article with code shows this but does not address adapters.
Conceptually speaking the code in the second code block shows how to get the new key
Public Class Form1
Private Sub StudentsBindingNavigatorSaveItem_Click(
sender As Object, e As EventArgs) Handles StudentsBindingNavigatorSaveItem.Click
Me.Validate()
Me.StudentsBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.MyDataSet)
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'MyDataSet.Students' table. You can move, or remove it, as needed.
Me.StudentsTableAdapter.Fill(Me.MyDataSet.Students)
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Me.StudentsTableAdapter.FillBy(Me.MyDataSet.Students, ComboBox1.Text)
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Me.MyDataSet.Students.AddStudentsRow("Jane", "Adams", "Female")
End Sub
End Class
Get new key taken from
this article.
Public Function AddNewRow(ByVal sender As Customer, ByRef Identfier As Integer) As Boolean
Dim Success As Boolean = True
Try
Using cn As New OleDb.OleDbConnection With {.ConnectionString = Builder.ConnectionString}
Using cmd As New OleDb.OleDbCommand With {.Connection = cn}
cmd.CommandText = InsertStatement
cmd.Parameters.AddWithValue("@CompanyName", sender.CompanyName)
cmd.Parameters.AddWithValue("@ContactName", sender.ContactName)
cmd.Parameters.AddWithValue("@ContactTitle", sender.ContactTitle)
cn.Open()
cmd.ExecuteNonQuery()
cmd.CommandText = "Select @@Identity"
Identfier = CInt(cmd.ExecuteScalar)
End Using
End Using
Catch ex As Exception
Success = False
End Try
Return Success
End Function
In closing I have not given you a solution but hopefully given you some stuff/logic to assist with this issue, if not perhaps I missed what you want conceptually speaking.
Additional resources
http://msdn.microsoft.com/en-us/library/fxsa23t6.aspx
Please remember to mark the replies as answers if they help and unmark them if they provide no help, this will help others who are looking for solutions to the same or similar problem.

GROUP BY - Is there a way to have some sort of for-each statement?

Hi there,
This discussion is a branch from https://forums.oracle.com/thread/2614679
I data mart I created for a chain of theatres. The fact table contain information about ticket sales, and I have a some dimensions including DimClient and DimTime.
Here is an example of each table:
FactTicketPurchase
TICKETPURCHASEID
CLIENTID
PRODUCTIONID
THEATREID
TIMEID
TROWID
SUMTOTALAMOUNT
60006
2527
66
21
942
40
7
60007
2527
72
21
988
36
6
60008
2527
74
21
1001
40
6
60009
2527
76
21
1015
37
6
60010
2527
79
21
1037
39
6
DDL for FactTicketPurchase
CREATE TABLE FactTicketPurchase(
TicketPurchaseID NUMBER(10) PRIMARY KEY,
ClientID NUMBER(5) CONSTRAINT fk_client REFERENCES DimClient,
-- ProductionID NUMBER(5) CONSTRAINT fk_prod REFERENCES DimProduction,
-- TheatreID NUMBER(5) CONSTRAINT fk_theatre REFERENCES DimTheatre,
TimeID NUMBER(6) CONSTRAINT fk_time REFERENCES DimTime,
-- TRowID NUMBER(5) CONSTRAINT fk_trow REFERENCES DimTRow,
SumTotalAmount NUMBER(22) NOT NULL);
DimClient
CLIENTID
CLIENT#
NAME
TOWN
COUNTY
2503
1
LEE M1
West Bridgford
Nottingham
2504
2
HELEN W2
Hyson Green
Nottingham
2505
3
LEE M3
Lenton Abbey
Nottingham
2506
4
LORA W4
Beeston
Nottingham
2507
5
SCOTT M5
Radford
Nottingham
2508
6
MINA W6
Hyson Green
Nottingham
    ..cff.
DDL for DimClient
CREATE TABLE DimClient(
ClientID NUMBER(5) PRIMARY KEY,
Name VARCHAR2(30) NOT NULL);
DimTime
TIMEID
FULLDATE
YEAR
SEASON
MONTH
MONTHDAY
WEEK
WEEKDAY
817
02-MAR-10
2010
Spring
3
2
9
3
818
03-MAR-10
2010
Spring
3
3
9
4
819
04-MAR-10
2010
Spring
3
4
9
5
820
05-MAR-10
2010
Spring
3
5
9
6
821
06-MAR-10
2010
Spring
3
6
9
7
822
07-MAR-10
2010
Spring
3
7
9
1
DDL for DimTime
CREATE TABLE DimTime(
TimeID NUMBER(6) PRIMARY KEY,
Year NUMBER(4) NOT NULL,
Season VARCHAR2(20));
I have the following analysis request to perform on this data mart:
Top 5 clients by value of ticket sale for each season
For this requirement I came up with the following query:
SELECT * FROM
(SELECT FacTIC.ClientID, DimCLI.Name, SUM(SumtotalAmount) SumTotalAmount, DimTIM.Season
FROM FactTicketPurchase FacTIC, DimClient DimCLI, DimTime DimTIM
WHERE FacTIC.ClientID = DimCLI.ClientID
AND FacTIC.TimeID = DimTIM.TimeID
AND Season = 'Spring' AND Year = 2010
GROUP BY Season, FacTIC.ClientID, DimCLI.Name
ORDER BY Season ASC, SumTotalAmount DESC)
WHERE rownum <=5;
As you can see, in line 06 of the above query, I am explicitly specifying the season for the query to return.
However what I would like to do is just one query that could autocratically go through the seasons and years available in the time dimension in a fashion similar to a FOR-EACH statement. This way, if we get more years added to the time dimension, we wouldn't have to amend the query.
Is this possible?
Regards,
P.

I think I fixed it!
The trick was to look into the r_num value. As soon as I added it to my query I started to see how r_num was being calculated and I realised that I had to add Season to my partition, right after Year.
SELECT Year, Season, TotalAmount, Name
FROM (
   SELECT   DimCLI.Name
   ,        DimTIM.Year
   ,        DIMTIM.Season
   ,        SUM(FacTIC.SumTotalAmount) TotalAmount
   ,        RANK() OVER (PARTITION BY Year, Season
                         ORDER BY SUM(FacTIC.SumTotalAmount) DESC
                        ) AS r_num
   FROM     FactTicketPurchase FacTIC
   ,        DimClient DimCLI
,         DimTime DimTIM
   WHERE    FacTIC.ClientID = DimCLI.ClientID
   AND      FacTIC.TimeID = DimTIM.TimeID
   GROUP BY DimTIM.Year
   ,        DimTIM.Season
   ,        DimCLI.Name
WHERE r_num <= 5 -- Need to amend this line on my data sample to show 2 rows.
ORDER BY Year, Season, TotalAmount DESC;
Looking at my data sample, I got the following:
YEAR
SEASON
TOTALAMOUNT
CLIENTID
2010
Autumn
29
2504
2010
Autumn
26
2503
2010
Spring
25
2503
2010
Spring
14
2506
2010
Summer
26
2506
2010
Summer
26
2504
2010
Winter
28
2503
2010
Winter
26
2506
2011
Autumn
23
2506
2011
Autumn
14
2503
2011
Spring
25
2505
2011
Spring
13
2503
2011
Summer
21
2505
2011
Summer
14
2503
2011
Winter
19
2505
Now, looking at my real data, (considering the top 5 rows, not the top 2), I got:
YEAR
SEASON
TOTALAMOUNT
NAME
2010
Autumn
141
BUSH M225
2010
Autumn
140
DIANA W66
2010
Autumn
136
HANA W232
2010
Autumn
120
DIANA W220
2010
Autumn
120
WILSON M459
2010
Spring
137
DAVID M469
2010
Spring
125
ALEX M125
2010
Spring
124
PETER M269
2010
Spring
115
ZHOU M463
2010
Spring
114
TANIA W304
2010
Summer
138
JANE W404
2010
Summer
105
MINA W8
2010
Summer
97
DAVID M275
2010
Summer
96
CLINTON M483
2010
Summer
93
ANNA W288
2011
Spring
12
LUISE W20
2011
Spring
7
ANNA W432
2011
Spring
7
LEE M409
2011
Spring
7
CHRIS W274
2011
Spring
7
HELEN W136
2011
Spring
7
LILY W114
2011
Spring
7
LUISE W348
2011
Spring
7
LIU M107
2011
Spring
7
VICTORY W194
2011
Spring
7
DIANA W240
2011
Spring
7
HELEN W120
2011
Spring
7
LILY W296
2011
Spring
7
MATTHEW M389
2011
Spring
7
PACO M343
2011
Spring
7
YANG M411
2011
Spring
7
ERIC M101
2011
Spring
7
ALEX M181
2011
Spring
7
SMITH M289
2011
Spring
7
DIANA W360
2011
Spring
7
MATTHEW M63
2011
Spring
7
SALLY W170
2011
Spring
7
JENNY W258
2011
Spring
7

HT1711 When I load one of my own CD's onto itunes, it creates separate albums for each unique pairing (ie: singer/composer or singer/orchestra). How can I keep all the cuts together on one album?

When I load one of my own cd's onto itunes, it creates separate albums for each unique pairing (ie: singer/composer or singer/orchestra). I end up with
the cuts scattered over several albums. How do I keep all the cuts on an album together rather than divided between several albums? I'm brand new with this technology, so I need your information in simple terms. Thank-you.

Generally all you need to do is fill in an appropriate Album Artist. For more details see my article on Grouping Tracks Into Albums, in particular the topic One album, too many covers.
The site could do with updating as some options have changed with iTunes 11, but the principles are the same.
tt2

Problem For/Each statement (or the problem is the MouseListener...)

Hi guys,
I'm making a program in java for school.
Now I have this:
          for(Stap2TrampolineModel trampoline : lijstTrampolines)
               trampoline = new Stap2TrampolineModel(0,215,100,"Poing",lijstKinderen); //model
               trampolineView = new Stap2TrampolineView(trampoline); //view
               trampolineController = new Stap2TrampolineController(trampoline, trampolineView); //controller
               trampolineView.setBounds(trampoline.getXInvoer(),trampoline.getYInvoer(),trampoline.getFormaat()+1,20);
               add(trampolineView);
               repaint();
and in the mouselistener this:
public void mouseClicked( MouseEvent e )
          System.out.println(lijstTrampolines.size());
          // Onderzoek of met de rechterknop is geklikt
if( e.isMetaDown() )
     // x = e.getX(); (for later needs)
//y = e.getY(); (for later needs)
lijstTrampolines.add(trampoline);
repaint();
The program should display a "trampoline" when I click...but it doesnt. It is added to the list, because I can see that in the console because of the System.out.println
But it doesn't show the display I want. When I delete the for each statement, it does show the "trampoline". So the mouselistener works (it gets added when I click) and the arraylist works (it shows that in the console), but the for each statement doesnt work...
Anyone knows how to solve this problem?

Where is this foreach loop located? In inialisation presumably. But that's over and done with when your mouseListener is called. I'd guess your list is empty when the loop is called, and it does nothing.
Your mouse listener, when it adds a trampoline must also add a trampoline view object. And the repaints don't do you any good, use revalidate() after adding a trampoline view to recalculate the layout.

Create single TO for each position of material in purchase order

Hi, I am facing a problem while recieving stock from GR mvt 101
I'm following this steps
1.- I'm creating a purchase order with several materials (The number of material
is diferent for each material)
2.- Good Receipt with MIGO,I'm using movement type 101, this was configurated for
create automatic TR and TO
3.- while I'm traying to create a Tranfer Order(LT04), SAP system send this errror
"you need to create single TO for each position of material"
Note: Only one Transfer Requirement was created with several postions.
4.- if I use LB11, the transfer order is created manual for each material, however
I need to do this one by one.
Are there any configuration that enable create one single TO for each position in
purchase order??.
Im trying to create TO with LT10 using a new movement type and this enable me move
material to bin location. However the TR still exist.
Thanks in advance.
Regards

The problem was resolved.
Thanks in advance

Creating a JButton for each line in a txt file

I need to know how to creating a JButton for each line in a txt file then add an actionListener to the number of buttons (note they are in a JTable). Here is a clipet of code thanx for the help (note that this is one part of a program i am making there are 2 more classes. If u need them just ask) Thanx:
class Diary extends JFrame implements ActionListener {
     private JTextArea note;
     private JTextField name;
     private JMenuBar menu = new JMenuBar();
     private JMenu file, edit, font, background, tcolor, settings, help;
     private JMenuItem nu, copy, paste, save, exit, b8, b10, b12, b14, b16, b18, b20, b24, b30, bblue, bred, bgreen, bpink, cblue, cred, cgreen, cpink, eset, nver, using, about;
     private String[] columnNames = {
          "File"
     private Vector dat = new Vector();
     private JTable filetable;
     public Diary() {
          setSize(new Dimension(500, 500));
          setTitle("Diary 2.00");
          file = new JMenu("File");
          menu.add(file);
          nu = new JMenuItem("new");
          nu.addActionListener(this);
          file.add(nu);
          file.add(new JSeparator());
          copy = new JMenuItem("copy");
          copy.addActionListener(this);
          file.add(copy);
          paste = new JMenuItem("paste");
          paste.addActionListener(this);
          file.add(paste);
          file.add(new JSeparator());
          save = new JMenuItem("Save");
          save.addActionListener(this);
          file.add(save);
          file.add(new JSeparator());
          exit = new JMenuItem("exit");
          exit.addActionListener(this);
          file.add(exit);
          edit = new JMenu("Edit");
          menu.add(edit);
          font = new JMenu("font");
          edit.add(font);
          b8 = new JMenuItem("8");
          b8.addActionListener(this);
          font.add(b8);
          b10 = new JMenuItem("10");
          b10.addActionListener(this);
          font.add(b10);
          b12 = new JMenuItem("12");
          b12.addActionListener(this);
          font.add(b12);
          b14 = new JMenuItem("14");
          b14.addActionListener(this);
          font.add(b14);
          b16 = new JMenuItem("16");
          b16.addActionListener(this);
          font.add(b16);
          b18 = new JMenuItem("18");
          b18.addActionListener(this);
          font.add(b18);
          b20 = new JMenuItem("20");
          b20.addActionListener(this);
          font.add(b20);
          b24 = new JMenuItem("24");
          b24.addActionListener(this);
          font.add(b24);
          b30 = new JMenuItem("30");
          b30.addActionListener(this);
          font.add(b30);
          background = new JMenu("background");
          edit.add(background);
          bblue = new JMenuItem("blue");
          bblue.addActionListener(this);
          background.add(bblue);
          bred = new JMenuItem("red");
          bred.addActionListener(this);
          background.add(bred);
          bgreen = new JMenuItem("green");
          bgreen.addActionListener(this);
          background.add(bgreen);
          bpink = new JMenuItem("pink");
          bpink.addActionListener(this);
          background.add(bpink);
          tcolor = new JMenu("text color");
          edit.add(tcolor);
          cblue = new JMenuItem("blue");
          cblue.addActionListener(this);
          tcolor.add(cblue);
          cred = new JMenuItem("red");
          cred.addActionListener(this);
          tcolor.add(cred);
          cgreen = new JMenuItem("green");
          cgreen.addActionListener(this);
          tcolor.add(cgreen);
          cpink = new JMenuItem("pink");
          cpink.addActionListener(this);
          tcolor.add(cpink);
          settings = new JMenu("Settings");
          menu.add(settings);
          eset = new JMenuItem("Edit Settings");
          eset.addActionListener(this);
          settings.add(eset);
          help = new JMenu("Help");
          menu.add(help);
          using = new JMenuItem("Using");
          using.addActionListener(this);
          help.add(using);
          about = new JMenuItem("About");
          about.addActionListener(this);
          help.add(about);
          help.add(new JSeparator());
          nver = new JMenuItem("new Versions");
          nver.addActionListener(this);
          help.add(nver);
          note = new JTextArea("");
          try {
               BufferedReader filein = new BufferedReader(new FileReader("files.txt"));
               String sfile;
               while ((sfile = filein.readLine()) != null) {
                    //add buttons per each line of the txt file and show em
          catch (FileNotFoundException ioe) {
               JOptionPane.showMessageDialog(null, "Iternal Error, contact [email protected] if the error persists", "", JOptionPane.WARNING_MESSAGE);
          catch (IOException ioe) {
               JOptionPane.showMessageDialog(null, "Iternal Error, contact [email protected] if the error persists", "", JOptionPane.WARNING_MESSAGE);JOptionPane.showMessageDialog(null, "Iternal Error, contact [email protected] if the error persists", "", JOptionPane.WARNING_MESSAGE);
          String[][] data = new String[dat.size()][];
          for (int x = 0; x < dat.size(); x++) {
               data[x] = (String[])dat.get(x);
          filetable = new JTable(data, columnNames);
          filetable.setPreferredScrollableViewportSize(new Dimension(100, 500));
          JScrollPane scrollpane = new JScrollPane(filetable);
          name = new JTextField("diary");
          JPanel main = new JPanel(new GridLayout(0, 1));
          getContentPane().add(note);
          getContentPane().add(name, BorderLayout.SOUTH);
          getContentPane().add(scrollpane, BorderLayout.WEST);
          setJMenuBar(menu);
     public void actionPerformed(ActionEvent e) {
          if (e.getSource() == nu) {
               int nuask = JOptionPane.showConfirmDialog(Diary.this, "Are you sure you want to make a new entry?\nThis will erease any unsaved entry's!!");
               if (nuask == JOptionPane.YES_OPTION) {
                    note.setText("");
                    note.setBackground(Color.WHITE);
                    note.setForeground(Color.BLACK);
          if (e.getSource() == copy) {
               note.copy();
          if (e.getSource() == paste) {
               note.paste();
          if (e.getSource() == save) {
               try {
                    String sn = name.getText();
                FileWriter outputStream = new FileWriter("saved/" + sn + ".txt");
                setTitle("Diary 1.00 : " + sn);
                outputStream.write(note.getText());
                outputStream.close();
            catch(IOException ioe) {
                 System.out.println("IOException");
          if (e.getSource() == exit) {
               int exitask = JOptionPane.showConfirmDialog(Diary.this, "Are you sure you want to exit? Any unsaved entries will be deleted");
               if (exitask == JOptionPane.YES_OPTION) {
                    System.exit(0);
          if (e.getSource() == b8) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),8));
          if (e.getSource() == b10) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),10));
          if (e.getSource() == b12) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),12));
          if (e.getSource() == b14) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),14));
          if (e.getSource() == b18) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),18));
          if (e.getSource() == b20) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),20));
          if (e.getSource() == b24) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),24));
          if (e.getSource() == b30) {
               note.setFont(new Font(note.getFont().getName(),note.getFont().getStyle(),30));
          if (e.getSource() == bblue) {
               note.setBackground(Color.BLUE);
          if (e.getSource() == bred) {
               note.setBackground(Color.RED);
          if (e.getSource() == bgreen) {
               note.setBackground(Color.GREEN);
          if (e.getSource() == bpink) {
               note.setBackground(Color.PINK);
          if (e.getSource() == cblue) {
               note.setForeground(Color.BLUE);
          if (e.getSource() == cred) {
               note.setForeground(Color.RED);
          if (e.getSource() == cgreen) {
               note.setForeground(Color.GREEN);
          if (e.getSource() == cpink) {
               note.setForeground(Color.PINK);
          if (e.getSource() == eset) {
               new UserSettings().setVisible(true);
          if (e.getSource() == about) {
               JOptionPane.showMessageDialog(null, "Created by Collin Doering 2005 in Gr.9\n\nErrors:\n------------------------------------------------------------------\n1. No File Encryption\n2. No user and password Encryption", "", JOptionPane.INFORMATION_MESSAGE );
          if (e.getSource() == nver) {
               JOptionPane.showMessageDialog(null, "New Version |3.00| expected July, 2005\n\nNew Features\n----------------------------------------------\n1. File Encryption\n2. User File Encryption\n3. Full help dialog\n4. More Text changing features", "", JOptionPane.INFORMATION_MESSAGE);
          if (e.getSource() == using) {
               JOptionPane.showMessageDialog(null, "Go ask Collin Doering\[email protected]", "", JOptionPane.INFORMATION_MESSAGE );
THANK YOU

so i still do not understand how i would create one
button per each line in a txt flle then read in the
file that the txt file specified.This assumes you know how many lines there are in the file.
If not, modify as per my prior post
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
String[] linesInFile = {"Hello","World","Goodbye","Now"};
JButton[] btn = new JButton[linesInFile.length];
public Testing()
    setLocation(200,200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new GridLayout(0,1));
    for(int x = 0; x < btn.length; x++)
      btn[x] = new JButton(linesInFile[x]);//<---this would be where file.readLine() goes
      jp.add(btn[x]);
      btn[x].addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent ae){
          JOptionPane.showMessageDialog(getContentPane(),ae.getActionCommand());}});
    getContentPane().add(jp);
    pack();
public static void main(String[] args){new Testing().setVisible(true);}
}

Jdbc driver creates new thread for each statement with a query timeout set

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