java - JPA查询: how to use select * from my_table where created_at > now() - INTERVAL '3 months' ?

Question

如何添加条件为 created_at > now() - INTERVAL '3month' 的 where 子句？

JPA 实体列:

@Column(name = "created_at")
@CreationTimestamp
@Temporal(TemporalType.TIMESTAMP)

Answer 1

您可以使用命名查询。

用以下方式注释您的实体类:

@NamedQuery(name = "Entity.findByCreatedDateGreaterThan", query = "FROM Entity e WHERE u.createdDate > :date")

要使用此命名查询:

public List<Entity> getEntityByCreatedDateGreaterThan() {
    Calendar calendar = Calendar.getInstance();
    calendar.add(Calendar.DAY_OF_MONTH, -90);
    Query namedQuery = getEntityManager().createNamedQuery("Entity.findByCreatedDateGreaterThan");
    namedQuery.setParameter("date", calendar.getTime());
    return namedQuery.getResultList();
}