mysql随机排序 order by rand()

@Query("SELECT a from #{#entityName} a where a.isDeleted=0 and a.sourceType=1 order by rand()")
fun findGankAll(pageable: Pageable): Page<Image>

@Query("SELECT a from #{#entityName} a where a.sourceType=1  and a.isDeleted=0 and a.category like %:searchText% order by rand()")
fun searchGank(@Param("searchText") searchText: String, pageable: Pageable): Page<Image>