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Database Version Control Without Pain




                           Harrie Verveer
                          June 11th 2010
Database Version Control
What’s the problem?




                           2
http://www.sxc.hu/photo/754535
http://www.sxc.hu/photo/1207911
http://en.wikipedia.org/wiki/File:STS120LaunchHiRes.jpg
http://www.sxc.hu/photo/1255121
Why Database Version Control




                               7
Simple Patching Strategy
The basic idea




                           8
Simple patching strategy




                           9
Example patch file

patch-001.sql




                     10
http://www.sxc.hu/photo/1214820
Simple patching strategy

                      Development
                            Write code
                        Write DB patches
                     Apply patches to own DB




     Apply patches                             Commit




                          Update


                                                        12
Fixing patches

patch-002.sql




                 13
Fixing patches

patch-002.sql




                 13
Fixing patches

patch-002.sql




                 13
Fixing patches

patch-003.sql




                 14
Fixing patches

patch-003.sql




     Never modify a patch file once
       it’s under version control


                                      14
Undo patch files

undo-001.sql




                   15
http://www.freefoto.com/preview/41-07-7
Bonus points




               Install.sql




                             17
Bonus points




         Initial dummy content




                                 18
http://www.sxc.hu/photo/643214
http://www.sxc.hu/photo/946855
Automating the process
Faster & Safer




                         21
http://www.sxc.hu/photo/314594
Typical patch script




                       23
Typical patch script

update.sh




                       24
http://www.sxc.hu/photo/1196126
Branches
Merge problems




                 26
Branches
Trunk
    patch-001.sql

    patch-002.sql


    patch-003.sql




                    27
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




                                               28
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




                                                               28
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


                                                                    29
Separate sequence

db/patches/trunk/   db/patches/branchA/

patch-001.sql       patch-001.sql
patch-002.sql       patch-002.sql
patch-003.sql




                                          30
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




                                                  30
Patchfile naming




       patch_20100611_1430.sql




                                 31
Patch log




            32
http://www.sxc.hu/photo/692740
Phing & DB Deploy
Avoiding the NIH syndrome




                            34
http://phing.info/




                     35
Phing




        36
37
DB Deploy




            38
DB Deploy

db/patches/1-create_user_table.sql




                                     39
Phing & DB Deploy




                    40
DB Deploy

changelog table:




                   41
DB Deploy

changelog table:




                   41
DB Deploy




            PHP




                  42
DB Deploy




            SQL




                  43
DB Deploy




            Features




                       44
Liquibase
A different approach




                       45
Liquibase




            www.liquibase.org




                                46
Liquibase




            47
Liquibase




            48
Liquibase




            49
Liquibase

  Updating
  Reverting
  Tagging
  Generate XML
  Diff




                 50
http://www.sxc.hu/photo/1241520
Liquibase




            Branches




                       52
Liquibase




            DBMS Support




                           53
Liquibase




            Documentation




                            54
Liquibase




            Java




                   55
Akrabat DB Schema Manager
Zend Framework specific solution




                                   56
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




                                      57
Writing the patch

scripts/migrations/001-CreateUserTable.php




                                             58
Writing the patch

scripts/migrations/001-CreateUserTable.php




                                             59
Akrabat DB Schema Manager




              PHP Patches




                            60
Akrabat DB Schema Manager




      Easy syntax if you know ZF




                                   61
Akrabat DB Schema Manager




              Easy to use




                            62
Akrabat DB Schema Manager




            Branch merging




                             63
Doctrine Migrations




                      64
Doctrine Migrations




         http://www.doctrine-project.org/




                                            65
Doctrine Migrations




                      66
Doctrine Migrations




            Update-to-version




                                67
Doctrine Migrations




             Generate patches




                                68
Doctrine Migrations




 Useful if you’re already using Doctrine
                   ORM




                                           69
Summary




          70
Summary

 Patchfiles                 Akrabat DB Schema Manager
                            http://akrabat.com
 • Automating
                            http://github.com/akrabat/Akrabat
 • Branch merging

                            Doctrine Migrations
 Phing + DB Deploy          http://www.doctrine-project.org
 http://phing.info
 http://dbdeploy.com


 Liquibase
 http://www.liquibase.org




                                                                71
Questions ?




              72
Contact me

Harrie Verveer
Software Engineer at Ibuildings


E-mail:
harrie@ibuildings.nl


Skype:
harrie-ibuildings


Twitter:
@harrieverveer




               http://joind.in/1544
                                      73

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Database version control DPC version

Editor's Notes

  1. ORM = Object Relations Mapper