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Release 0-6-20091207

Student Name:	Suran Jayathilaka
Mentor Name:	rick hillegas
Title:	Implement ANSI/ISO Sequence Generators For Apache Derby
Abstract:	This project will add support for ANSI/ISO compliant sequence generators to the Apache Derby RDBMS with the following features. 1. Creating/dropping a Sequence generators with optional clauses 2. Granting and revoking permissions to users or roles to use a sequence generator 3. Invoking a sequence generator 4. Altering an existing sequence generator Also two new system catalogs to store sequence descriptions and usage permission records will be added, along with upgrade logic for older databases.