1 files changed, 2 insertions, 8 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index 9cb7c46df5..648c869915 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -543,7 +543,7 @@ module ActiveRecord
           m.register_type %r(longblob)i,   Type::Binary.new(limit: 2**32 - 1)
           m.register_type %r(^float)i,     Type::Float.new(limit: 24)
           m.register_type %r(^double)i,    Type::Float.new(limit: 53)
-          m.register_type %r(^json)i,      MysqlJson.new
+          m.register_type %r(^json)i,      Type::Json.new
 
           register_integer_type m, %r(^bigint)i,    limit: 8
           register_integer_type m, %r(^int)i,       limit: 4
@@ -837,12 +837,7 @@ module ActiveRecord
           end
         end
 
-        class MysqlJson < Type::Internal::AbstractJson # :nodoc:
-          def changed_in_place?(raw_old_value, new_value)
-            # Normalization is required because MySQL JSON data format includes
-            # the space between the elements.
-            super(serialize(deserialize(raw_old_value)), new_value)
-          end
+        class MysqlJson < Type::Json # :nodoc:
         end
 
         class MysqlString < Type::String # :nodoc:
@@ -865,7 +860,6 @@ module ActiveRecord
             end
         end
 
-        ActiveRecord::Type.register(:json, MysqlJson, adapter: :mysql2)
         ActiveRecord::Type.register(:string, MysqlString, adapter: :mysql2)
         ActiveRecord::Type.register(:unsigned_integer, Type::UnsignedInteger, adapter: :mysql2)
     end