Nuker 1, 4 10 To run an HTTP server, replace the main class for the server in the example command line above with the following:. A server can provide connections to more than one database. Statement can be reused to execute a different statement each time. A server connection uses a TCP port for communications.

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Note in the above connection URL, there is no mention of the database file, as this was specified when running the server. Throwable while attempting to get a new connection: PreparedStatementthe engine keeps the compiled SQL statement for reuse, until the java. When a HyperSQL server is run, network access should be adequately protected. PreparedStatement object is closed. Email Required, but hswldb shown. The database file path is specified using an application server property.

HSQLDB – User – Unable to recover XA Datasource state after exception

In most server modes, the server can serve an unlimited number of databases that are specified at the time of running the server, or optionally, as a connection request is received. For example, if the file: On Wed, 17 Feb In this case, if the database does not exist, xxa getConnection method will throw an exception.


These databases do not have any files. HyperSQL can provide database access within the user’s application process, within an application server, or as a separate server process.

The only reason for using this method of access is restrictions imposed by firewalls on the client or server machines and it should not be used where there are no such restrictions. A server connection uses a TCP port for communications.

Unfortunately, I couldn’t find class org.

Unable to recover XA Datasource state after exception

Standard compliance is the most unique characteristic of HyperSQL. The engine has been developed much further in version 2.

There are three types of catalog depending on how the data is stored. Note When the engine closes the database at a shutdown, it creates temporary files with the extension. The first time in-process connection is made to a database, some general data structures are initialised and a few helper threads are started.

HSQLDB Introduction

The server can also act as a small general-purpose web server for static pages. This feature is useful for running tests, where it may not be practical to xz the database after each test.


There are three server modes, based on the protocol used for communications between the client sa server. Those versions are numbered 2. Both mechanisms can be specified when running the Server or WebServer. At the time of the next startup, all such files will be renamed or deleted by the database engine.

This feature has a side effect that can confuse new users. HyperSQL provides two optional security mechanisms.

You can not post a blank message. The exception is the default SA user, which is not case-sensitive. The Servlet mode can serve multiple databases. Post as a guest Name. You can add the command line argument –help to get a hsqdlb of available arguments for these tools. In general, JDBC is used for all access to databases.

But if a second connection is made to an open database, using a path and name that differs only in case, then the connection is made to the existing open database.