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Understanding EclipseLink, 2.4
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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 Times or Timestamps)

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.

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

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