Copyright (c) 2005-2013 Andrew Chilton andychilton@gmail.com
PgPatcher is a program which helps you organise and apply SQL patches for your Postgres database schema. You could run this program as part of your upgrade scripts which makes sure that each patch is applied in the right order.
As an example, consider the following:
$ pgpatcher -U dbuser -d dbname -s /usr/share/kiwiwriters/db/patch -l 5
This command would make sure the database is patched up to level 5. If any particular patches don't apply, further ones won't be applied at all. The patch level is stored in a table called 'property' which you should create in the first patch.
This program creates both a skeleton forward and reverse patch. In the case of any normal patch the skeleton file doesn't contain much but in the case of patch level 1 (two files, 0->1 and the reverse patch 1->0) the skeleton file contains code to create the property table, update it and drop it in the reverse patch.
$ pgcreatepatch -l 1
Creates two files:
- patch_0_1.sql
- patch_1_0.sql
Both pgpatcher and pgcreatepatch both take the following options:
- -d = dbname
- -U = user
- -h = host
- -s = script (the prefix for the script, default: 'patch')
- -l = level
- -v = verbose
But please see --help on either program for more information.
Artistic v2 - http://opensource.org/licenses/Artistic-2.0
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