Support any mysql-like adapter

activerecord/lib/active_record/railties/databases.rake

@@ -57,7 +57,7 @@ namespace :db do
       end
     rescue
       case config['adapter']
-      when 'mysql'
+      when /mysql/
         @charset   = ENV['CHARSET']   || 'utf8'
         @collation = ENV['COLLATION'] || 'utf8_unicode_ci'
         creation_options = {:charset => (config['charset'] || @charset), :collation => (config['collation'] || @collation)}
@@ -224,7 +224,7 @@ namespace :db do
   task :charset => :environment do
     config = ActiveRecord::Base.configurations[Rails.env || 'development']
     case config['adapter']
-    when 'mysql'
+    when /mysql/
       ActiveRecord::Base.establish_connection(config)
       puts ActiveRecord::Base.connection.charset
     when 'postgresql'
@@ -242,7 +242,7 @@ namespace :db do
   task :collation => :environment do
     config = ActiveRecord::Base.configurations[Rails.env || 'development']
     case config['adapter']
-    when 'mysql'
+    when /mysql/
       ActiveRecord::Base.establish_connection(config)
       puts ActiveRecord::Base.connection.collation
     else
@@ -343,7 +343,7 @@ namespace :db do
     task :dump => :environment do
       abcs = ActiveRecord::Base.configurations
       case abcs[Rails.env]["adapter"]
-      when "mysql", "oci", "oracle"
+      when /mysql/, "oci", "oracle"
         ActiveRecord::Base.establish_connection(abcs[Rails.env])
         File.open("#{Rails.root}/db/#{Rails.env}_structure.sql", "w+") { |f| f << ActiveRecord::Base.connection.structure_dump }
       when "postgresql"
@@ -391,7 +391,7 @@ namespace :db do
     task :clone_structure => [ "db:structure:dump", "db:test:purge" ] do
       abcs = ActiveRecord::Base.configurations
       case abcs["test"]["adapter"]
-      when "mysql"
+      when /mysql/
         ActiveRecord::Base.establish_connection(:test)
         ActiveRecord::Base.connection.execute('SET foreign_key_checks = 0')
         IO.readlines("#{Rails.root}/db/#{Rails.env}_structure.sql").join.split("\n\n").each do |table|
@@ -425,7 +425,7 @@ namespace :db do
     task :purge => :environment do
       abcs = ActiveRecord::Base.configurations
       case abcs["test"]["adapter"]
-      when "mysql"
+      when /mysql/
         ActiveRecord::Base.establish_connection(:test)
         ActiveRecord::Base.connection.recreate_database(abcs["test"]["database"], abcs["test"])
       when "postgresql"
@@ -481,7 +481,7 @@ task 'test:prepare' => 'db:test:prepare'
 
 def drop_database(config)
   case config['adapter']
-  when 'mysql'
+  when /mysql/
     ActiveRecord::Base.establish_connection(config)
     ActiveRecord::Base.connection.drop_database config['database']
   when /^sqlite/