GitHub - dougcole/activerecordpostgresqlexplain: an ActiveRecord extention for accessing Postgresql's explain data

Name		Name	Last commit message	Last commit date
lib		lib
tasks		tasks
test		test
MIT-LICENSE		MIT-LICENSE
README		README
Rakefile		Rakefile
init.rb		init.rb
install.rb		install.rb
uninstall.rb		uninstall.rb

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ActiveRecordPostgresqlExplain
=======================

an ActiveRecord extention for accessing Postgresql's explain data - useful for estimating the cost of queries in Postgresql.


Example
=======

>> User.estimate(:cost, :conditions => "login ILIKE '%doug%'")
=> 85.78

>> User.estimate(:count, :conditions => "login ILIKE '%doug%'")
=> 15

Note these are only estimates, take them as an order of magnitude estimate instead of faster count:
>> User.count(:conditions => "login ILIKE '%doug%'")
=> 8    # vs the estimate of 15


Copyright (c) 2008 Estately.com, released under the MIT license