Question

我想使用当前日期函数

比较jpql查询中的两个日期

我收到了错误

语法错误解析[SELECT d FROM Dossier d WHERE d.depid = 1 AND d.typeDossier =：tpd AND d.dateCreation＆lt; CURRENT_TIMESTAMP（）+ 5]。
[105,107]左表达式不是算术表达式

这是我的疑问：

public List<Dossier> getDossierFindAllParDepartementDBTECHandUrgen() {
    return (List<Dossier>) em.createQuery("SELECT d FROM Dossier d WHERE d.depid=1 AND d.typeDossier = :tpd AND " +
        "d.dateCreation < CURRENT_TIMESTAMP() + 5",
                                          Dossier.class).setParameter("tpd", "Urgent").getResultList();
}

Answer 1

JPA支持函数CURRENT_TIMESTAMP

https://en.wikibooks.org/wiki/Java_Persistence/JPQL#Functions

但不适用于算术运算。您可以使用参数解决问题，例如

TypedQuery<Dossier> query = em.createQuery("SELECT d FROM Dossier d WHERE d.depid=1 AND d.typeDossier = :tpd AND " +
        "d.dateCreation < :fiveDaysAhead",
                                          Dossier.class);
Date myFiveDaysAhead = new Date(Calendar.getInstance().add(Calendar.DAYS_OF_YEAR,5).getTimeInMillis());//or something
query.setParameter("tpd", "Urgent");
query.setParameter("fiveDaysAhead", myFiveDaysAhead, TemporalType.TIMESTAMP);

也可能找到供应商特定的解决方案，正如我在另一个答案中注意到的https://stackoverflow.com/a/18514326/2835455

将CURRENT_TIMESTAMP（）用于查询时出错

1 个答案: