1. Shyam Varan Nath President, Oracle BIWA SIG Session #464 April 17, 2008 11 AM-12 noon Database Development Best Practices: Supporting Agile/Extreme Programming

2. About Me! Oracle DBA/Developer since Oracle V6 (1994). OCP in 4 database tracks since 1998 Spoken in Oracle Openworld since 2003, IOUG/Collaborate since 2005 Founder and President of Oracle BIWA SIG Awarded IOUG – Oracle Contribution Award 2007 for success of BIWA SIG Currently Senior Oracle Developer at Citco Experience of development in Finance/Banking, Telecomm, Healthcare etc

3. Introduction Agile Development and its impacts to Database Developers/DBA’s Understand the buzz words like Agile Development, Xtreme Programming, Scrum Adapt ourselves to support such an environment Develop a free and easy to implement Oracle database centric framework for handling rapid database changes

4. What this Session is Not About? Database normalization or how to develop ER models Designing database for performance optimization or tuning Coding tips or writing efficient PL/SQL scripts

5. What is Scrum?

6. Software Development Methodology Waterfall Methodology Users Requirements Document (URD)

7. Database Development Tasks Different tasks for a DB developers / DBA Database Schema Design (ER Diagram) Schema changes Data changes, initial data loads Stored business logic in procedures, functions and triggers

8. Challenges for a Database Developer / DBA A. Go Crazy with all these releases in-house OR B. Use the DB schema numbering methodology developed earlier to keep it under control. And the final answer is

9. Development Lifecycle 1.1. Development phases of new application (it could be deployment of new packaged application with customization instead) 2.2. Rollout of the application 3.3. Periodic new features, enhancements released in phased manner 4.4. Hot fixes / defect fixes for purely production support.

10. Product Conformance Matrix Product Conformance Matrix to track the difference components of the product including the DB related components

11. Organized FileSystem Name and store the database scripts in organized folders

12. Patch Framework Table for Patch Framework create table V_PATCH_STAT ( stat VARCHAR2(2) not null, stat_txt VARCHAR2(80) not null, crt_usr VARCHAR2(30) default 'user' null, crt_dttm DATE default sysdate null, mdfy_usr VARCHAR2(30) null, mdfy_dttm DATE null ); create table V_PATCH_HIST ( patch VARCHAR2(25) not null, patch_level VARCHAR2(10) not null, patch_date DATE default SYSDATE null, version VARCHAR2(10) null, patch_stat VARCHAR2(2) null );

13. Patch Execution -- !!! Change Previously required patch !!! Exec BP_INSERT_PATCH_HIST('&patch_name','&patch_number', '&patch_version', 'DBPatch','236', '1'); ---------------------------------------------------------------------------- -- [S1] Adding column pay_recv to PAYMENT_BATCHES --Payment Batch Performance Inprovements -- CODE: TKYTE ---------------------------------------------------------------------------- create or replace procedure sp_patch_237_S1 as … create or replace procedure sp_patch_237_S2 as … etc

14. Execution of the Framework CREATE OR REPLACE PROCEDURE sp_patch_schema IS BEGIN DBMS_OUTPUT.put_line ('EXECUTE sp_patch_237_S1'); sp_patch_237_S1; DBMS_OUTPUT.put_line ('EXECUTE sp_patch_schema done'); --Execute this if there are no schema changes to update status patch --DBMS_OUTPUT.put_line ('No schema changes for this patch'); END sp_patch_schema; / Execute BP_SCHEMA_CHANGES ('&patch_name', '&patch_number', '&patch_version');

15. Code Snippets and Demo

16. Summary and Recap Recap –Agile, Xtreme Development –Impact on Database developers and DBA’s –Adapting to Agile methodology, develop DB centric framework –Pieces of the framework

17. Questions?

18. Thank You Please complete the evaluation form –Speaker: Shyam Varan Nath, –Session name: Database Development Best Practices: Supporting Agile/Extreme Programming –Session#464 –Contact information Shyam Varan Nath www.OracleBIWA.org 954 609 2402 ShyamVaran@Gmail.com