Database version control - pf congres version

Database Version Control Without Pain Harrie Verveer PFCongres - April 17th 2010

Database Version Control What’s the problem? 2

Here used to be an image of an airplane that I removed because of the license the image was published under http://www.sxc.hu/photo/754535

Here used to be an image of an airplane that I removed because of the license the image was published under http://www.sxc.hu/photo/1207911

http://en.wikipedia.org/wiki/File:STS120LaunchHiRes.jpg Here used to be an image of the space shuttle that I removed because of the license the image was published under

http://www.sxc.hu/photo/1255121 Here used to be an image of a bike that I removed because of the license the image was published under

Why Database Version Control 7

Why Database Version Control Database Version Control is left behind 8

Simple Patching Strategy The basic idea 9

Simple patching strategy Patch files 10

Simple patching strategy 11

Simple patching strategy Mostly structural changes 12

Simple patching strategy Chronological filenames 13

Simple patching strategy Remember last executed patch 14

Simple patching strategy Development Write code Write DB patches Apply patches to own DB Apply patches Commit Update 15

Example patch file patch-001.sql 16

Fixing patches patch-002.sql 17

Fixing patches patch-003.sql 18

Fixing patches patch-003.sql Never modify a patch file once it’s under version control 18

Undo patch files patch-001.sql 19

Undo patch files undo-001.sql 20

Here used to be an image of a one-way sign that I removed because of the license the image was published under http://www.freefoto.com/preview/41-07-7

Process Copy production to test environment Apply patches Run tests Backup live database Update production 22

Bonus points Install.sql 23

Bonus points Initial dummy content 24

Here used to be an image of a guy in a rowing boat that I removed because of the license the image was published under http://www.sxc.hu/photo/643214

Here used to be an image of a sunken boat that I removed because of the license the image was published under http://www.sxc.hu/photo/946855

Automating the process Faster & Safer 27

Typical patch script Run the patches 28

Typical patch script Keep track of last executed patch 29

Typical patch script 30

Typical patch script update.sh 33

Branches Merge problems 34

Branches Trunk patch-001.sql patch-002.sql patch-003.sql 35

Branches Trunk patch-001.sql patch-002.sql patch-003.sql Branch A create branch patch-004.sql patch-004.sql patch-005.sql patch-005.sql 36

Branches Trunk patch-001.sql patch-002.sql patch-003.sql Branch A create branch patch-004.sql patch-004.sql patch-005.sql patch-005.sql Merge 37

Branches Trunk patch-001.sql patch-002.sql patch-003.sql Branch A create branch patch-004.sql patch-006.sql patch-004.sql patch-005.sql patch-007.sql patch-005.sql Merge 37

Branches Trunk patch-001.sql Branch A create branch patch-002.sql patch-002.sql patch-003.sql Branch B create branch patch-003.sql Merge patch-004.sql patch-004.sql patch-004.sql patch-005.sql patch-005.sql Merge patch-005.sql Merge Merge 38

Separate sequence db/patches/trunk/ db/patches/branchA/ patch-001.sql patch-001.sql patch-002.sql patch-002.sql patch-003.sql 39

Separate sequence db/patches/trunk/ db/patches/branchA/ patch-001.sql patch-001.sql patch-002.sql patch-002.sql patch-003.sql Trunk version 3 BranchA version 2 39

Patchfile naming Filenames based on time 40

Patch log At this point our patch number tracking doesn’t work anymore!!! patch_20100322_2158.sql patch_20100323_0839.sql patch_20100327_1025.sql 41

Patch log At this point our patch number tracking doesn’t work anymore!!! patch_20100322_2158.sql patch_20100323_0839.sql patch_20100327_1025.sql Last executed: patch_20100327_1025 41

Patch log At this point our patch number tracking doesn’t work anymore!!! patch_20100322_2158.sql patch_20100322_2253.sql patch_20100323_0839.sql patch_20100325_1528.sql patch_20100327_1025.sql patch_20100328_1230.sql Last executed: patch_20100327_1025 41

Patch log At this point our patch number tracking doesn’t work anymore!!! patch_20100322_2158.sql patch_20100322_2253.sql patch_20100323_0839.sql patch_20100325_1528.sql patch_20100327_1025.sql patch_20100328_1230.sql patch_20100322_2158.sql patch_20100322_2253.sql Last executed: patch_20100323_0839.sql patch_20100327_1025 patch_20100325_1528.sql patch_20100327_1025.sql patch_20100328_1230.sql 41

Patch log 42

Branches False sense of security 43

Phing Avoiding the NIH syndrome 44

http://phing.info/ 45

Phing 46

DB Deploy 48

DB Deploy 49

DB Deploy changelog table: 50

Akrabat DB Schema Manager Zend Framework specific solution 51

Akrabat DB Schema Manager Zend Framework Proposed by Rob Allen in 2006 Recently implemented Might be in ZF in the near future http://github.com/akrabat/Akrabat 52

Writing the patch scripts/migrations/001-CreateUserTable.php 53

Writing the patch scripts/migrations/001-CreateUserTable.php 54

Running the patch 55

Akrabat DB Schema Manager Easy to use if you know ZF PHP instead of SQL-only Easy to ‘undo’ patches Branch merging problem Run from your deploy script 58

Multiple servers ssh harrie@webserver188 59

http://www.capify.org/ 60

Capistrano cd /dir/where/my/app/is svn update php updatedb.php 61

Capistrano cd /dir/where/my/app/is svn update php updatedb.php 62

Capistrano & the database 63

Capistrano Automate deployment No coding needed Extending possible Useful tool for PHP developers Replace railsy voodoo with PHPish 1337ness 64

Summary 65

Summary Patchfiles • Automating • Branch merging Phing + DB Deploy http://phing.info http://dbdeploy.com Akrabat DB Schema Manager http://akrabat.com http://github.com/akrabat/Akrabat Capistrano http://capify.org 66

Questions ? 67

Contact me Harrie Verveer Software Engineer at Ibuildings E-mail: harrie@ibuildings.nl Skype: harrie-ibuildings Twitter: @harrieverveer http://joind.in/1499 68

Dutch PHP Conference june 10 - 12 RAI Amsterdam http://phpconference.nl 69

Database version control - pf congres version

by Harrie Verveer on Apr 21, 2010

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Database version control - pf congres version — Presentation Transcript