1 files changed, 4 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/type/date_time.rb b/activerecord/lib/active_record/connection_adapters/type/date_time.rb
index c34f4c5a53..43203a4cd4 100644
--- a/activerecord/lib/active_record/connection_adapters/type/date_time.rb
+++ b/activerecord/lib/active_record/connection_adapters/type/date_time.rb
@@ -8,6 +8,10 @@ module ActiveRecord
           :datetime
         end
 
+        def extract_precision(sql_type)
+          $1.to_i if sql_type =~ /\((\d+)\)/
+        end
+
         private
 
         def cast_value(string)