In these circumstances the driver raises an exception and execution fails. Normally, with a JDBC driver, PreparedStatement s are precompiled on creation, which gives increased performance if they are used a sufficient number of times. This is caused by triggers; replication is also implemented through triggers, so you will encounter this issue on replicated databases too. If you’ll look at the query you are trying to execute, you’ll see that it probably returns an update count first, followed by a ResultSet. 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. Why do I get java. There may be a number of reasons why this could happen:.
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Normally, with a JDBC driver, PreparedStatement s are precompiled on creation, which gives increased performance if they are used a sufficient number of times.
You are required to use TDS 5. While doing this it times out, throwing the exception you see which means that jTDS was not mssl to get information about the running instances.
Although this means that a “good” driver could “fix” this behavior, fixing it would imply caching the whole server response, equaling a huge jtda drop. We will make the necessary changes.
The existing configuration should look similar to this:. Once I did this, everything worked well. Driver class, which means that jtds.
If you are getting this in an application, start your application with. In both cases if you call Statement. If you’ll look at the query you are trying to execute, you’ll see that it probably returns an update count first, followed by a ResultSet. The database administrator told me that the SQL Server instance name is.
Maven Repository: » jtds
In this case it’s the net. While you are using getConnection function. The existing configuration should look similar to this: That syntax worked when connecting to the server and instance using SSMS, but it didn’t work when connecting through the Java driver. You will have to use the instance property either append it smsql the URL or place it into the Properties you supply to getConnection instead of doing it the Microsoft way. Or even better, a benchmark I can run myself? When calling a stored procedure that has output parameters, the driver has to call the procedure using a remote procedure call RPC.
A common mistake is to append a semicolon “;” to the end of the URL e. This gives jTDS a 2x performance increase over the next fastest driver in some not so uncommon cases.
Indeed, some SQLExceptions jjtds reported with a correct state code and some not.
A common solution rather than the inelegant execute and then cycling through multiple result sets, msswl to supress the update counts for statements you are uninterested in. In the Bitbucket Server home directorybitbucket.
Post as a guest Name. So, for maximum compatibility, it is recommended that you use execute anytime you run queries returning more than one result even if the particular driver you are using allows you to do otherwise. Powered by Confluence and Scroll Viewport.
This mssqo common if say you are querying a stored procedure that creates a temp table, runs updates against it and then returns the table as a result set. 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.
Transitioning from jTDS to Microsoft’s JDBC driver – Atlassian Documentation
jjtds This is caused by triggers; replication is also implemented through triggers, so you will encounter this issue on replicated databases too. Because there is no URL when using the JtdsDataSource there are three other properties with setters and getters to take the place of those items that are part of the URL’s syntax: Is there any commercial technical support available for jTDS?
SQL is sent to the server each time without any preparation, literals are inserted in the SQL slower. 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.
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.
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