Database Support

EclipseLink supports any relational database that is compliant with SQL and has a compliant JDBC driver. EclipseLink has extended support for several database platforms. The extended support mainly consists of providing native sequencing support, schema creation, and certain database functions.

The databases in Table A-1 are supported. The Java classes are in the org.eclipse.persistence.platform.database package and are described in Java API Reference for EclipseLink.

Table A-1 Supported Database Platforms

Database	Java Class	Features
Apache Derby	`org.eclipse.persistence.platform.database.DerbyPlatform`	Provides Derby-specific behavior.
Attunity	`org.eclipse.persistence.platform.database.AttunityPlatform`	Platform class that works with Attunity's Connect JDBC driver.
dBASE	`org.eclipse.persistence.platform.database.DBasePlatform`	Provides dBASE-specific behavior, including: Writes `Time` and `Timestamp` as strings (dBASE does not support `Time`s or `Timestamp`s)
Firebird	`org.eclipse.persistence.platform.database.FirebirdPlatform`	Provides Firebird-specific behavior.
H2	`org.eclipse.persistence.platform.database.H2Platform`	Provides H2-specific behavior.
HyperSQL DataBase (HSQL)	`org.eclipse.persistence.platform.database.HSQLPlatform`	Provides HSQL-specific behavior. Supports HSQL functionality as of 1.8.1. Features include: DDL creation `IDENTITY` sequencing `SEQUENCE` objects Functions Pagination
IBM Cloudscape	`org.eclipse.persistence.platform.database.CloudscapePlatform`	Provides CloudScape DBMS-specific behavior.
IBM DB2 Mainframe	`org.eclipse.persistence.platform.database.DB2MainframePlatform`	Provides DB2 Mainframe-specific behavior. This provides for some additional compatibility in certain DB2 versions on OS390. Features include: Specialized `CONCAT` syntax
IBM DB2	`org.eclipse.persistence.platform.database.DB2Platform`	Provides DB2-specific behavior, including: Schema creation Native SQL for `byte[]`, `Date`, `Time`, and `Timestamp` Table qualified names. Stored procedures Temporary tables Casting Database functions Identity sequencing `SEQUENCE` sequencing
IBM Informix	`org.eclipse.persistence.platform.database.InformixPlatform`	Provides Informix-specific behavior, including: Types for schema creation. Native sequencing using `@SERIAL`.
Microsoft Access	`org.eclipse.persistence.platform.database.AccessPlatformPlatform`	Provides Microsoft Access-specific behavior.
Microsoft SQLServer	`org.eclipse.persistence.platform.database.SQLServerPlatform`	Provides Microsoft SQL Server-specific behavior, including: Native SQL for `byte[]`, `Date`, `Time`, and `Timestamp`. Native sequencing using `@IDENTITY`.
MySQL	`org.eclipse.persistence.platform.database.MySQLPlatform`	Provides MySQL-specific behavior, including: Native SQL for `Date`, `Time`, and `Timestamp` Native sequencing Mapping of class types to database types for the schema framework Pessimistic locking Platform specific operators
Oracle	`org.eclipse.persistence.platform.database.OraclePlatform`	Provides Oracle Database-specific behavior, including: `LOB` `NChar` `XMLType` `TIMESTAMP` (`TZ`, `LTZ`) Native batch writing Structured object-relational data-types PLSQL datatypes and stored procedures VPD, RAC, proxy authentication XDK XML parser Hierarchical selects (Select by prior) Returning clause Flashback history and queries Stored procedures, output parameters and output cursors Stored functions Oracle AQ
Oracle JavaDB	`org.eclipse.persistence.platform.database.JavaDBPlatform`	Allows the use of `JavaDBPlatform` as a synonym for `DerbyPlatform`.
Oracle TimesTen	`org.eclipse.persistence.platform.database.TimesTenPlatform`	Provides Oracle TimesTen database-specific behavior.
Oracle TimesTen7	`org.eclipse.persistence.platform.database.TimesTen7Platform`	Provides Oracle TimesTen 7 database-specific behavior.
PervasivePlatform	`org.eclipse.persistence.platform.database.PervasivePlatform`	Provides Pervasive PSQL-specific behavior.
PointBase	`org.eclipse.persistence.platform.database.PointBasePlatform`	Provides PointBase database-specific behavior.
PostgreSQL	`org.eclipse.persistence.platform.database.PostgreSQLPlatform`	Provides PostgreSQL database-specific behavior, including: Native SQL for `Date`, `Time`, and `Timestamp` Native sequencing Mapping of class types to database types for the schema framework Pessimistic locking Platform specific operators `LIMIT`/`OFFSET` query syntax for select statements See also PostgreSQL: `http://wiki.eclipse.org/EclipseLink/FAQ/JPA/PostgreSQL`
SAP MaxDB	`org.eclipse.persistence.platform.database.MaxDBPlatform`	Provides MaxDB database-specific behavior.
SAP SyBase SQLAnywhere	`org.eclipse.persistence.platform.database.SQLAnywherePlatform`	Provides SQL Anywhere-specific behavior.
Sybase	`org.eclipse.persistence.platform.database.SybasePlatform`	Provides Sybase-specific behavior, including: Native SQL for `byte[]`, `Date`, `Time`, and `Timestamp` Native sequencing using `@IDENTITY`
Fujitsu Symfoware	`org.eclipse.persistence.platform.database.SymfowarePlatform`	Provides Symfoware-specific behavior, including: DDL Generation Outer Join Subquery (with limitations) Stored Procedure Calls Stored Procedure Generation Native Sequences/Identifier fields JPA Bulk Update/Delete (with limitations) Batch Reading Batch Writing Pessimistic Locking (with limitations) First Result/Limit (with limitations) Expression Framework (with limitations) Delimiters Auto Detection

It also possible to extend EclipseLink to add extended support for additional platforms. There are also several user-contributed platforms in the EclipseLink incubator project. See Platform Incubator:

http://wiki.eclipse.org/EclipseLink/Development/Incubator/Platform