instance method batch_condition

# File activerecord/lib/active_record/relation/batches.rb, line 348
      def batch_condition(relation, cursor, values, operators)
        cursor_positions = cursor.zip(Array(values), operators)

        first_clause_column, first_clause_value, operator = cursor_positions.pop
        where_clause = predicate_builder[first_clause_column, first_clause_value, operator]

        cursor_positions.reverse_each do |column_name, value, operator|
          where_clause = predicate_builder[column_name, value, operator == :lteq ? :lt : :gt].or(
            predicate_builder[column_name, value, :eq].and(where_clause)
          )
        end

        relation.where(where_clause)
      end