1 files changed, 2 insertions, 22 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
index 9a5e2d05ef..1458fbf496 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
@@ -1,5 +1,3 @@
-require 'active_record/connection_adapters/postgresql/cast'
-
 module ActiveRecord
   module ConnectionAdapters
     # PostgreSQL-specific extensions to column definitions in a table.
@@ -18,26 +16,8 @@ module ActiveRecord
         @default_function = default_function
       end
 
-      # :stopdoc:
-      class << self
-        include PostgreSQL::Cast
-
-        # Loads pg_array_parser if available. String parsing can be
-        # performed quicker by a native extension, which will not create
-        # a large amount of Ruby objects that will need to be garbage
-        # collected. pg_array_parser has a C and Java extension
-        begin
-          require 'pg_array_parser'
-          include PgArrayParser
-        rescue LoadError
-          require 'active_record/connection_adapters/postgresql/array_parser'
-          include PostgreSQL::ArrayParser
-        end
-      end
-      # :startdoc:
-
-      def accessor
-        cast_type.accessor
+      def serial?
+        default_function && default_function =~ /\Anextval\(.*\)\z/
       end
     end
   end