table_comment

# File activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 291
      def table_comment(table_name) # :nodoc:
        scope = quoted_scope(table_name)

        query_value(<<~SQL, "SCHEMA").presence
          SELECT table_comment
          FROM information_schema.tables
          WHERE table_schema = #{scope[:schema]}
            AND table_name = #{scope[:name]}
        SQL
      end