kjeldahl-mysql_schema_bulk_change

= mysql_schema_bulk_change

• http://github.com/jacob_kjeldahl/mysql_schema_bulk_change

== DESCRIPTION:

This extension to the MysqlAdapter in ActiveRecord enables bulk updates to schema definitions.

Pr. default when calling connection#add_column the change will be executed a once, but Mysql allows for multiple changes to be executed in one SQL statement (http://dev.mysql.com/doc/refman/5.1/en/alter-table.html). The advantage of this is that it takes a lot less time, especially if the table is large.

== FEATURES/PROBLEMS:

• Bulk updates to schema definitions when using connection.change_table do |table|
• Use the old approch using change_table_direct

== SYNOPSIS:

In a migration:

change_table :large_table do |t| t.string :name t.column :name, :string t.index :name => 'index_on_name' t.remove_index :name => 'index_on_author' t.remove :auhor_id, :editor_id end

== REQUIREMENTS:

• ActiveRecord 2.3.2
• Mysql

== INSTALL:

• sudo gem install kjeldahl-mysql_schema_bulk_change --source http://gems.github.com

== LICENSE:

(The MIT License)

Copyright (c) 2009 Jacob Kjeldahl

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.