== Partition Plugin

This plugin uses native database techniques to partition tables based on field values.

Currently this plugin only works for Postgres and will only partition based on a date or string field.

== Installation

script/plugin install git://github.com/ss/se-partition.git

== Example migration

class CreateUser < ActiveRecord::Migration

def self.up create_table :users do |t| t.string :name t.timestamps end add_index :users, :created_at

# Partition user table by week
SE::Partition.partition(User, :created_at, :interval => 'week', :verbose => false)

end

def self.down drop_table :users end end

== Postgres Notes

The postgres code was heavily borrowed from: http://valgogtech.blogspot.com/2008/04/table-partitioning-automation-triggers.html

In order for postgres partitioning to work most effectively, you need to make sure you have constraint_exclusion set to 'on' or 'partition' in your postgresql.conf

You'll also need to add the following monkey-patch:

class ActiveRecord::ConnectionAdapters::PostgreSQLAdapter

partition triggers can't return values. :(

def supports_insert_with_returning?
  false
end

end