Index: database.rb
===================================================================
--- database.rb	(revision 17354)
+++ database.rb	(working copy)
@@ -21,7 +21,7 @@
     class << self
       # Returns true if the database is PostgreSQL
       def postgresql?
-        (ActiveRecord::Base.connection.adapter_name =~ /postgresql/i).present?
+        ActiveRecord::Base.connection.adapter_name.casecmp('postgresql') == 0
       end
 
       # Returns the PostgreSQL version or nil if another DBMS is used
@@ -46,7 +46,7 @@
 
       # Returns true if the database is MySQL
       def mysql?
-        (ActiveRecord::Base.connection.adapter_name =~ /mysql/i).present?
+        ActiveRecord::Base.connection.adapter_name.casecmp('mysql') == 0
       end
 
       # Returns a SQL statement for case/accent (if possible) insensitive match