HyperSQL is the only open-source relational database management system with a high performance dedicated lob storage system, suitable for gigabytes of lob data. Unit test only test the code on the class, mocking dependencies, thus not using the real ones as you were doing. Advanced features include user-defined SQL procedures and functions, schemas, datetime intervals, updatable views, arrays, lobs, full and lateral joins and set operations. MariaDB and others were also considered. A connection should be reused as much as possible and closed only when it is not going to be used again for a long while. In other words, before adding a whole new database, why not upgrade existing users first to a newer version of HSLQDB 2.

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The embedded database concept is very helpful during the development phase, because they are lightweight, fast, quick start time, improve testability, ease of configuration, it lets developer focus more on the development instead of how to configure a data source to the database, or waste time to start a heavyweight database to just test a few lines of code.

This is done by making a connection to the database, then using various methods of the java. Unit test only test the code on the class, mocking dependencies, thus not using the real ones as you were doing.

For H2 embeddev, make sure it start within the same unit test, else you will unable to connect to the database. When a server instance is started, or when a connection is made to an in-process database, a new, empty embeddec is created if no database exists at the given path.


The data file contains the data for cached tables and the backup file is a compressed backup of the last known consistent state of the data file.

So it all started with this: In this case, if the database does not exist, the getConnection method will throw an exception. Tools can use command line arguments. While the “test” catalog is hsqpdb, a test.

HSQLDB Connection Help

It would be better to default to a SQLite provider. With Firebird there is just a single firebird. This article relies too much on references to primary sources.

Thanks for your response. Have u included the appropriate jar files in ur classpath?

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Java code to connect to the local secure SSL hsql and http Servers. This command rewrites the. MariaDB and others were also considered. Sign up or log in Sign up using Google.

The database engine runs in a JVM and opens one or more in-process catalogs.

HSQLDB Connection Help using JDBC for HSQLDB Embedded and HSQLDB Server for Windows, Mac and Linux

See the Properties chapter. Establishing a connection and closing it has some overheads, therefore it is not good practice to create a new connection to perform a small number of operations. But if a second connection is made to an open database, using a path and name that differs only in case, hsqqldb the connection is made to the existing open database.

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Note When the engine closes the database at a shutdown, it creates temporary files with the extension. Tabbed forms within a Main Form. It would have meant significantly dumbing down LO. Connection object also has some methods for transaction control.

These files should not be deleted by the user. I can confirm that the auto-increment problem I mentioned above has been fixed in version 5. The command line argument –help can be used to get a list of available arguments.

Chapter 1. Running and Using HyperSQL

If you create an identical directory structure on the C: Please help improve this article by adding citations to reliable sources. PreparedStatement is much faster than using a java. Looking at the documentation hsqldh Firebird I found that it does not implement auto-increment fields directly.

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. The script file contains the definition of tables and other database objects, plus the data for non-cached tables.

At the time of the next startup, all such files will be renamed or deleted by the database engine.