When jTDS sends the 8. The exception is thrown because it’s better to warn the user that the output parameters are not yet set instead of leaving the impression that all is ok and cause other, harder to detect problems. Features such as generated keys retrieval, named stored procedure parameters, and save points are also implemented. The default install does not configure the SQL Browser service to start automatically so you must do it manually. This gives jTDS a 2x performance increase over the next fastest driver in some not so uncommon cases. Although queries returning multiple results are not very common, it is the reason why this behavior is customizable from the URL. Without the native SSO library installed you still have to provide the username and password because otherwise jTDS cannot determine user credentials.

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This is common if say you are querying a stored procedure that creates a temp table, runs updates against it ktds then returns the table as a result set.

In this case the driver will be able to use an RPC succesfully as all the parameters are represented by parameter markers? ,oad that’s the case, replace jtds. Actually we do have benchmark results from two different benchmarks, both developed by large commercial SQL Server JDBC driver vendors to demonstrate the performance of their own drivers. As a sidenote, The Microsoft jtes and probably the others, too “optimize” this behavior by skipping over the update count, which is wrong according to the JDBC spec.

For queries that return multiple results the JDBC spec requires execute to be used. The root cause is that triggers also return update counts and jTDS can’t make the difference between these update counts and the “real” one neither could any other SQL Server client.


Unable to load database driver – help with datasource profile

However, you can run any of the benchmarks yourself, the effort is minimal. You can control the real batch size using the batchSize parameter; setting it to a non-zero value will break up batches into smaller pieces on execution, hopefully avoiding the problem.

When calling a stored procedure that has output parameters, the driver has to call the procedure using a loar procedure call RPC.

The only part of jTDS we guarantee is thread safe is the Connection object, and multi threaded access to Statement s is discouraged except for issuing cancels.

We will make the necessary changes. A common solution rather than the inelegant execute and then cycling through multiple result sets, is liad supress the update counts for statements you are uninterested in.

JDBC Drivers for Microsoft SQL Server – DbVisualizer

In these circumstances the driver raises an exception and execution fails. So for procedures returning ResultSet s you will have to loop, consuming all results before reading the output parameters i. Can jTDS be used in a multi threaded application?

CallableStatement output parameter getter throws java. In order to change jtss you have to specify it explicitly in the Properties or the URL you supply when you create the connection. The number of statements that are kept open simultaneously can be controlled with the maxStatements parameter; see the jTDS URL format for more information.

For the moment you can get technical support from individual developers of jTDS. The “Connection refused” exception is thrown by jTDS when it is unable to connect to the server.


[SQL] Unable to load database driver – help with datasource profile – JIRA

So, for maximum compatibility, it is recommended that you use execute anytime you run queries returning more jyds one result even if the particular driver you are using allows you to do otherwise. In case you are wondering if this is right, this is a quote from the CallableStatement API documentation: SQL is sent to the server each time without any preparation, literals are inserted in the SQL slower. Is there any commercial technical support available for jTDS?

Or even better, a benchmark I can run myself? Indeed, loaf SQLExceptions are reported with a correct state code and some not.

The exception you are getting is usually caused by a timeout. Why do I still need to provide a username and password? Memory Usage Memory usage keeps increasing when using generated PreparedStatements. A common mistake is to append a semicolon “;” to the end of the URL e. Scenario iwhile it does work, is not necessarily a good solution because it requires a lot of locking and waiting on the jtxs network connection plus last but not least a lot of caching.

There is a good side to this: Although queries returning multiple results are not very common, it is the reason why this behavior is customizable from the URL.

Here are the results of the i-net test: There may be a number of reasons why this could happen:.