Database Refactoring With Liquibase

AGILE DATABASE DEVELOPMENT WITH Tim Berglund June, 2009

TIM BERGLUND

WE BELIEVE CODE CHANGES

WE ACT LIKE THE DATABASE DOESN’T

TERMINAL MALADAPTION

EMBALMING

WON’T DIE

NOT REALLY ALIVE

CURSES THE DBA WHO CHANGES IT

WE WILL BREAK THE CURSE

AGILE DATABASE DEVELOPMENT

Refactoring Evolutionary Automated Data Testing Modeling Agile Database Development Source Sandboxes Control

REFACTORING

REFACTORING This term occasionally gets abused!

REFACTORING A disciplined way to make small changes to your source code to improve its design, making it easier to work with.

REFACTORING Not adding features!

REFACTORING Not ﬁxing bugs!

REFACTORING Opportunistically improving design to accommodate change.

DATABASE REFACTORING A simple change to a database schema that improves its design while retaining both its behavioral and informational semantics.

EVOLUTIONARY DATA MODELING

EVOLUTIONARY DATA MODELING NOT TRYING TO “GET IT RIGHT UP FRONT.”

EVOLUTIONARY DATA MODELING MAYBE SOME BIG THOUGHTS AT FIRST

EVOLUTIONARY DATA MODELING BUILD THE SIMPLEST THING THAT CAN POSSIBLY WORK...EVERY DAY

DATABASE TESTS TDD IN THE DB

DATABASE TESTS

DATABASE TESTS STORED PROCEDURES

DATABASE TESTS STORED PROCEDURES SQLUNIT

DATABASE TESTS STORED PROCEDURES SQLUNIT DBUNIT

DATABASE TESTS STORED PROCEDURES SQLUNIT DBUNIT CUSTOM HYBRIDS

SOURCE CONTROL

SOURCE CONTROL LIKE MOTHER TAUGHT YOU

SOURCE CONTROL

SOURCE CONTROL DDL EXTRACT/MIGRATION SCRIPTS REFERENCE DATA STORED PROCS/TRIGGERS

SANDBOXES

COMMAND-LINE TOOL

COMMAND-LINE TOOL JAVA/JDBC

COMMAND-LINE TOOL JAVA/JDBC CROSS-PLATFORM

COMMAND-LINE TOOL JAVA/JDBC CROSS-PLATFORM ANT, MAVEN, SPRING, GRAILS

CHANGELOG

CHANGELOG COMMANDS

CHANGELOG COMMANDS MIGRATION SCENARIOS

CHANGELOG

CHANGELOG SQL IN XML

CHANGELOG SQL IN XML COHERENT GROUPS OF OPERATIONS

CHANGELOG SQL IN XML COHERENT GROUPS OF OPERATIONS TRACKED IN DATABASE

CHANGELOG <changeSet author="tlberglund (generated)" id="1236660747556-11"> <createTable tableName="scshoppingcart"> <column autoIncrement="true" name="id" type="INT"> <constraints nullable="false"/> </column> <column name="userid" type="INT"> <constraints nullable="false"/> </column> <column name="lastmodified" type="DATETIME"/> <column name="name" type="VARCHAR(50)"/> </createTable> </changeSet> <changeSet author="tlberglund" id="spot-1-1-2"> <renameTable oldTableName="scscrubrecordwarehouse" newTableName="scrub_record_log" /> </changeSet>

LIQUIBASE COMMANDS

LIQUIBASE COMMANDS generateChangeLog

LIQUIBASE COMMANDS changeLogSync

LIQUIBASE COMMANDS update

LIQUIBASE COMMANDS tag

LIQUIBASE COMMANDS rollback

LIQUIBASE COMMANDS diff

AND WE’RE BACK

Refactoring Evolutionary Automated Data Testing Modeling Agile Database Development Source Sandboxes Control

CULTIVATING THE BROWNFIELD

LEGACY ENTERPRISE APP

NEW GRAILS HOTNESS

HARD CUTOVER

CREATIVE ORM MAPPINGS

WITHERING ON THE VINE

BROWNFIELD DATA INTEGRATION

BROWNFIELD DATA INTEGRATION TIME ZERO MIGRATION

BROWNFIELD TESTING

BROWNFIELD TESTING INTEGRATION TEST DATA

BROWNFIELD TESTING

BROWNFIELD TESTING T0 MIGRATION SCRIPTS

BROWNFIELD TESTING

THE CURSE IS BROKEN

THANK YOU! TIM BERGLUND AUGUST TECHNOLOGY GROUP, LLC http://www.augusttechgroup.com tim.berglund@augusttechgroup.com @tlberglund

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Database Refactoring With Liquibase

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