Inline typecasting helpers from Column to the appropriate types

1 files changed, 17 insertions, 1 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 757553cd68..c34f4c5a53 100644
--- a/activerecord/lib/active_record/connection_adapters/type/date_time.rb
+++ b/activerecord/lib/active_record/connection_adapters/type/date_time.rb
@@ -11,7 +11,23 @@ module ActiveRecord
         private
 
         def cast_value(string)
-          Column.string_to_time(string)
+          return string unless string.is_a?(::String)
+          return if string.empty?
+
+          fast_string_to_time(string) || fallback_string_to_time(string)
+        end
+
+        # '0.123456' -> 123456
+        # '1.123456' -> 123456
+        def microseconds(time)
+          time[:sec_fraction] ? (time[:sec_fraction] * 1_000_000).to_i : 0
+        end
+
+        def fallback_string_to_time(string)
+          time_hash = ::Date._parse(string)
+          time_hash[:sec_fraction] = microseconds(time_hash)
+
+          new_time(*time_hash.values_at(:year, :mon, :mday, :hour, :min, :sec, :sec_fraction, :offset))
         end
       end
     end