HSQLDB (HyperSQL Database) is a relational database management system written in Java. Now in its 24th year, HSQLDB version 2.7.4 is the result of 14 years improvements since version 2.0. It offers many features and adheres closely to the latest SQL and JDBC 4.3 standards.
This release should be used in preference to earlier 2.x releases, as it fixes a number of bugs and regressions, as well as improving functionality and adding new features.
The main jars in this package are Java module jars and compatible with Java 11 and later. The alternative jars are compatible with Java 8 and later. The jars have been tested with JRE 8, 11 and 21.
The development and maintenance of HyperSQL has been possible because of financial contributions by business users. We need renewed contributions. Please subscribe to SupportWare at http://hsqldb.org/web/supportware . Especially if you include HSQLDB as part of an applications that you sell, or use it in production, you are expected to subscribe to SupportWare at the appropriate level. Subscribers get priority for support and feature requests.
Hourly paid support for HyperSQL is available from http://hyperxtreme.co.uk. This service provides all the help needed to use or integrate HSQLDB with your application.
For applications that require more speed with very large data sets, or need to store more data in a memory database, the commercial product, HyperXtremeSQL is available from http://hyperxtreme.co.uk. This product is fully compatible with HSQLDB SQL queries and JDBC calls. It also has extensive SQL OLAP and procedural language features, together with extra crash-recovery and database management capabilities.
This download contains the following files and directories:
bin
This directory contains some Windows utility wrapper scripts.
This directory contains the ant build.xml script and Gradle build files. See the Building HyperSQL Jars appendix of the HyperSQL User Guide for details.
When the jar is rebuilt, this directory contains the *.class files generated by the ANT build tool. It does not exist in the distribution zip.
A set of HTML, PDF and text documents covering different aspects of HSQLDB and some of its utilities.
HyperSQL
User Guide in HTML format.
HyperSQL User Guide
in PDF format.
HyperSQL
Utilities Guide in HTML format.
HyperSQL
Utilities Guide in PDF
format.
The JavaDoc for public classes, including the JDBC documentation.
Chronological list of minor changes and bug fixes since the release of version 2.0 changelist_2_0.txt
HyperSQL source and binaries are released under the 3-clause BSD license. The license text hsqldb_lic.txt is for sources developed entirely by the HSQL Development Group. The hypersonic_lic.txt is for the few sources that contain code from the closed HypersonicSQL project.
The jar needed for running HyperSQL and its GUI utilities (hsqldb.jar) has been pre-built in this directory. The jar for SqlTool (sqltool.jar) is also in this directory. The jars are compatible with Java version 8 and above. The extra zip file in the directory is needed only for recompiling hsqldb and is not required for deployment.
All source code is in this directory.
Contains test scripts for the database engine and SqlTool. These scripts are run by separate test utilities for the engine and SqlTool
All source code for documentation is in this directory.
We constantly fix reported issues. Please check the web site regularly for latest updated version and latest information. Follow us on Twitter @hypersql for updates.
Support documentation for HyperSQL including the FAQ and links to resources are available from http://hsqldb.org/support in various forms, including user forums. Support is given to open source developers for using HSQLDB in their products.
The highly configurable java source code formatter Jindent is used to format the HSQLDB source code.
This Software is developed and published by the HSQL Development Group
Fred Toussi (fredt (at) users.sourceforge.net)
Blaine Simpson (blaine dot simpson (at) admc dot com)