case_sensitive_comparison

# File activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 605
      def case_sensitive_comparison(table, attribute, column, value)
        if !value.nil? && column.collation && !column.case_sensitive?
          table[attribute].eq(Arel::Nodes::Bin.new(Arel::Nodes::BindParam.new))
        else
          super
        end
      end