Limitations of Statement.addBatch() jdbc:odbc bridge to SQL Server 2K

Question

Hi all,
I was attempting some performance tuning in my applications and I attempted to use the addBatch method in a statement during a loop and the corresponding executeBatch when the loop is complete. For some reason all my inserts were not sent to the database. So I did a test. I wrote some code that would allow me to create 'X' amount of sql statements and add them to batch and execute. Here's a sample of my code:
void jButton7_actionPerformed(ActionEvent e)
try
if(connect == null)
String url = "jdbc:odbc:someDataSourceName";
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
connect =
DriverManager.getConnection( url, "****", "****");
System.out.println("Connection supports batch updates T/F = " + connect.getMetaData().supportsBatchUpdates());
int x = new Integer(fldNumOfLoops.getText()).intValue();
java.sql.Statement stat = connect.createStatement();
stat.addBatch("create table stutemp (somecolumn varchar(200)); ");
for(int i = 0; i < x; i++)
stat.addBatch("insert into stutemp (somecolumn) values('This is a test of inserting row Number " + i + "'); ");
java.sql.Timestamp tsNow = new java.sql.Timestamp(new java.util.Date().getTime());
stat.executeBatch();
System.out.println("Batching " + x + " rows started " + tsNow + " ended " + new java.sql.Timestamp(new java.util.Date().getTime()));
stat.close();
stat = null;
stat = connect.createStatement();
java.sql.ResultSet rs = stat.executeQuery("select count(*) from stutemp");
while(rs.next())
System.out.println("Results returned from sb batching = " + rs.getString(1));
stat.close();
stat = null;
stat = connect.createStatement();
stat.execute("drop table stutemp");
connect.close();
connect = null;
catch(Exception ex)
ex.printStackTrace();
For some reason, I'm only safe inserting 455 records along with the table create. sometimes it will allow me to insert 456, or 457, but never any more than that. And it fluctuates. Does anyone know why this is? Is there a size limit on adding statements to batch? For giggles, I created a String Buffer version where I'm adding statements to a stringbuffer and doing an execute on the statement. I'm getting the same results.
Thanks,
Stu

Answer 1

Sorry, One more thing. If I put a Thread.Sleep(); after the execute batch I get more inserts depending on the amount of time I tell my thread to sleep.........
What's up with this. Shouldn't this be a Sync process where the calling thread should wait until the statement executes????????????????