public class PromotionTemplateStatistics {

    ...

    @Column(name = "views")
    @Field(name = "viewsSort", analyze = Analyze.NO, store = Store.NO, index = Index.NO)
    @SortableField(forField = "viewsSort")
    private Long views;

    @Column(name = "conversion")
    @Field(name = "conversionSort", analyze = Analyze.NO, store = Store.NO, index = Index.NO)
    @SortableField(forField = "conversionSort")
    private BigDecimal conversion;

    ...
}