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HSQL Database Engine 2.0.0

HSQL Database Engine - A relational database engine

A relational database engine to help you with your work.

HSQL Database Engine is a Java based relational database engine with a JDBC driver, supporting a large subset of ANSI-92 SQL. A small, fast engine with both in memory and disk based tables.

HSQL Database Engine features  :


- Original code, based on in-depth study of database theory and the SQL Standard

- Ahead of other open-source solutions in supported SQL features

- The fastest overall open-source SQL implementation for small and medium sized databases

- Three transaction control models, including lock based and MVCC models

- Fully multithreaded

- Compact code footprint


- 100% Java

- Support JDK 1.1.x, 1.2.x, 1.3.x, 1.4.x, 1.5.x, 1.6.x in HyperSQL 1.8.1 and 1.5.x and 1.6.x in HyperSQL 2.0

- Extensive JDBC interface support with batch statement and scrollable ResultSet functionality

- Updatable, insertable ResultSet functionality

- Full JDBC DatabaseMetaData and ResultSetMetaData support

- Java stored procedures and functions

- Full support for PreparedStatement objects to speed up query processing


- Relational Database Management System, which can store Serializable Java objects

- Very extensive support for SQL:2008 Standard syntax, including most optional features

- Supports all base data types of the SQL Standard, including BINARY, BIT, BOOLEAN, date-time, INTERVAL, BLOB, CLOB

- Supports datetime and interval arithmetic with and without time zone

- Supports user-defined DOMAIN types, including type constraints




- UNION, EXCEPT, INTERSECT, including use of parentheses, limits and offsets, ALL, DISTINCT and CORRESPONDING keywords

- Scalar (single value) SELECTS, row, table and correlated subqueries including IN, EXISTS, ANY, ALL

- Views, temporary tables and sequences

- Updatable views

- Primary key, unique and check constraints on single or multiple columns

- Referential Integrity (foreign keys) on multiple columns with full cascading options (delete, update, set null, set default)


- COUNT, SUM, MIN, MAX, AVG and statistical aggregate functions

- Full support for SQL expressions such as CASE .. WHEN .. ELSE .. , NULLIF , BETWEEN, MATCHES, etc.

- SQL standard autoincrement IDENTITY column support plus sequences

- SQL standard GENERATED columns calculated using other columns and function calls

- Very extensive set of built-in functions

- Transaction COMMIT, ROLLBACK and SAVEPOINT support

- Multiple schemata per database

- Triggers, implemented as Java classes, or as SQL statements

- Database security with passwords, user rights and roles with GRANT and REVOKE down to column level

- Extensive set of ALTER TABLE commands, including change of table column type

- SQL stored procedures and functions

- INSTEAD OF triggers which enable insert, update and delete on several table with a single statement

- Full set of SQL Standard INFORMATION SCHEMA views

- Query optimizer can use indexes for AND, OR, IN predicates


- In-memory tables for fastest operation

- Disk based tables for large data sets

- Text tables with external file data sources such as CSV files can be used as SQL tables

- CLOB and BLOB storage up to 64 TB with no memory limit on individual LOB size

- Disk tables (CACHED TABLE) up to 256GB and text tables up to 2GB each

- Size of each string or binary item only limited by memory

- Fast startup and shutdown with internal incremental backup feature

- Online and offline backup capability

- Database dump as SQL script with or without data


- Embedded (into Java applications) and Client-Server operating modes

- Three client server protocols: HSQL, HTTP and HSQL-BER - can run as an HTTP web server - all with SSL option

- Can be used in applets, read-only media (CD), inside jars, webstart and embedded applications

- Multiple databases per JVM

- ODBC support


- Powerful and compact Java command line and GUI tools for database management

- Transfer tool for conversion of databases to / from other popular database management systems


- Java

HSQL Database Engine Details

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