}
		argVal.setFloat(f)
		err = e.aggregate.runningSum.arithOp(opPlus, argVal)

	case aggFnMin:
		err = e.aggregate.runningMin.minmax(argVal, false, isFirstRow)

	case aggFnMax:
		err = e.aggregate.runningMax.minmax(argVal, true, isFirstRow)

	default:
		err = errInvalidAggregation
	}

	return err
}

// assumed to be numeric. Attempts conversion to numeric type for `a`
// (first int, then float) only if the underlying values do not have a
// type.
func (v *Value) minmax(a *Value, isMax, isFirstRow bool) error {
	err := inferTypeForArithOp(a)
	if err != nil {
		return err
	}

	if !a.isNumeric() {
		return errArithMismatchedTypes
	}