2 files changed, 1 insertions, 12 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 2d7cd6c17a..c761153941 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -28,8 +28,6 @@ module ActiveRecord #:nodoc:
   end
   class ConfigurationError < StandardError #:nodoc:
   end
-  class UnknownTypeError < ActiveRecordError #:nodoc:
-  end
   
   class AttributeAssignmentError < ActiveRecordError #:nodoc:
     attr_reader :exception, :attribute
@@ -224,7 +222,6 @@ module ActiveRecord #:nodoc:
   #   objects that should be inspected to determine which attributes triggered the errors.
   # * +AttributeAssignmentError+ -- an error occurred while doing a mass assignment through the +attributes=+ method.
   #   You can inspect the +attribute+ property of the exception object to determine which attribute triggered the error.
-  # * +UnknownTypeError+ -- Raised when AbstractAdapter#type_to_sql cannot map the type given to a native type.
   #
   # *Note*: The attributes listed are class-level attributes (accessible from both the class and instance level).
   # So it's possible to assign a logger to the class through Base.logger= which will then be used by all
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index 5f9f99b0b2..e0c880780e 100755
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -392,7 +392,6 @@ module ActiveRecord
       end
 
       def add_column(table_name, column_name, type, options = {})
-        native_type = native_database_types[type]
         add_column_sql = "ALTER TABLE #{table_name} ADD #{column_name} #{type_to_sql(type, options[:limit])}"
         add_column_options!(add_column_sql, options)
         execute(add_column_sql)
@@ -431,14 +430,7 @@ module ActiveRecord
       end       
 
       def type_to_sql(type, limit = nil)
-        unless native = native_database_types[type]
-          raise(
-            ActiveRecord::UnknownTypeError, 
-            "Unable to convert type '#{type}' to a native type. " +
-            "Valid options: #{native_database_types.keys.to_sentence}"
-          )
-        end
-
+        native = native_database_types[type]
         limit ||= native[:limit]
         column_type_sql = native[:name]
         column_type_sql << "(#{limit})" if limit