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### HyperSQL version 2.3.3 Distribution

HSQLDB (HyperSQL Database) is a relational database management system written in Java. Now in its 15th year, the latest version 2.3.3 is the result of 10 years development since version 1.8.0 and 5 years improvements over version 2.0. It offers many features and adheres closely to the latest SQL and JDBC 4 standards.

This is a point release of version 2.3. 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.

#### SUPPORTWARE

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 request.

#### COMMERCIAL SUPPORT

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.

#### SCALABILITY UPGRADES

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 queries and other statements.

#### PACKAGE CONTENTS

This download contains the following files and directories:

bin

This directory contains some Windows utility wrapper scripts, and some HTML pages with HSQLDB embedded as an applet.

#### build

This directory contains the ant build.xml script, Gradle build files, plus MSDOS CMD files for build. See the Building HyperSQL Jars appendix of the HyperSQL User Guide for details.

#### classes

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.

#### doc

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

The license texts for the source and binaries, based on the BSD license. hsqldb_lic.txt is for sources developed entirely by the HSQL Development Group. hypersonic_lic.txt is for the few sources that contain code from the closed HypersonicSQL project.

#### lib

The jar needed for running HyperSQL and its GUI utilities (hsqldb.jar) has been pre-built in this directory. The jar is compatible with Java version 1.6. The jar for SqlTool (sqltool.jar) is also in this directory. The extra zip file in the directory is needed only for recompiling hsqldb and is not required for deployment.

#### src

All source code is in this directory.

#### testrun

Contains test scripts for the database engine and SqlTool. These scripts are run by separate test utilities for the engine and SqlTool

#### CHANGES

- Versions 2.x have evolved over five years since 2010. This version is the most stable and bug-free version in the 2.x series.
- Compared to version 1.8, there are many new features and changes. Most of these do not affect compatibility with version 1.8.x.
- Differences are detailed in the Guide. The main differences are as follows:
- Transaction isolation is always enforced - READ COMMITTED and SERIALIZABLE modes are supported.
- GENERATED BY DEFAULT AS IDENTITY does not create a primary key. A primary key must be declared explicitly.
- Column sizes are enforced, although you can change this and other properties to some extent.

#### UPDATES

We constantly fix reported issues. Please check the web site regularly for latest updated version and latest information.

#### RESOURCES

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.

#### NOTE

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)

http://hsqldb.org