1 files changed, 3 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb b/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb
index fbab654112..af1db30047 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb
@@ -2,14 +2,14 @@ module ActiveRecord
   module ConnectionAdapters
     module MySQL
       module Quoting # :nodoc:
-        QUOTED_TRUE, QUOTED_FALSE = '1', '0'
+        QUOTED_TRUE, QUOTED_FALSE = '1'.freeze, '0'.freeze
 
         def quote_column_name(name)
-          @quoted_column_names[name] ||= "`#{super.gsub('`', '``')}`"
+          @quoted_column_names[name] ||= "`#{super.gsub('`', '``')}`".freeze
         end
 
         def quote_table_name(name)
-          @quoted_table_names[name] ||= super.gsub('.', '`.`')
+          @quoted_table_names[name] ||= super.gsub('.', '`.`').freeze
         end
 
         def quoted_true