Permalink
Switch branches/tags
Nothing to show
Find file
Fetching contributors…
Cannot retrieve contributors at this time
46 lines (31 sloc) 1.18 KB
== 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