Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Using Edition-based redefinition with PL/SQL How to deploy database code changes with zero downtime Chris Saxon, Oracle Developer Advocate for & blogs.oracle.com/sqlblogs.oracle.com/sql

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Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | The PL/SQL Deployment Challenge! How do we get PL/SQL into production with no outage?

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | The PL/SQL Deployment Challenge! Database may be INcon SIS tenT

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | The PL/SQL Deployment Challenge! No time to test

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | The PL/SQL Deployment Challenge! Can’t get DDL lock

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Emergency Rollback?

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Solutions pre-11gR2

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Rename Your Objects! YOUR_PKG_V1 -> YOUR_PKG_V2 -> YOUR_PKG_V3 -> etc.

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | PROCEDURE PACKAGE VIEW Rename Your Objects!

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | PROCEDURE PACKAGE VIEW PROCEDURE_V2 PACKAGE_V2 VIEW_V2 Rename Your Objects!

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Rename Your Objects! SMALL_VIEW_V3BIG_VIEW_V2SMALL_VIEW_V2 SOME_PKG_V5aSOME_PKG_V5b A_PKG_V3A_PROC_V3A_PROC_V5b

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Replicate Your Database and $$$

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Limited code reuse Lose native compilation No dependency management No Database Compiled PL/SQL!

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | EBR to the Rescue!

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | EDITION_1EDITION_2EDITION_3 EBR to the Rescue! PROCEDURE PACKAGE VIEW

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | How do I use EBR?

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Editions Enable Your Database Editions enable your users – alter user enable editions; There is no rollback command!

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Create the Edition Create an edition – create edition new_edition; Grant user privileges: – grant use on edition new_edition to my_user;

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Switch Edition and Deploy! Change current edition – Alter session set edition = new_edition; Compile your code

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Connect and Test Can specify in connection string: – ORA_EDITION environment variable – oracle.jdbc.editionName JDBC variable – Link database service to edition

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | That was too easy! Surely there must be a catch?

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Not Everything is Editionable MY_PACKAGE PUBLIC SYNONYM MATERIALIZED VIEW

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Not Everything is Editionable MY_PACKAGE PUBLIC SYNONYM MATERIALIZED VIEW

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Many editions > risk of missteaks

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Managing Multiple Editions Set your database default edition Remove access to old editions Good governance!

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Further Reading 11gR2 Documentation: m#ADFNS020 m#ADFNS020 12cR1 Documentation: Oracle-BASE article: redefinition-11gr2.phphttp://oracle-base.com/articles/11g/edition-based- redefinition-11gr2.php Tom Kyte’s Oracle Magazine article, Edition-Based Redefinition, Part 1: html html Edition-based redefinition whitepaper, Bryn Llewellyn July 2009: based-redefinition pdf based-redefinition pdf

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Summary Use EBR to deploy PL/SQL with zero downtime Easier than replication More practical than package renaming Requires 11gR2+

Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Questions?