Java Hibernate支持UNION ALL吗?
我是一个部分UI开发人员,现在我需要转入Hibernate开发。今天,当我尝试使用UNION ALL时,HQL出现了一个问题,以下是HQL:Java Hibernate支持UNION ALL吗?,java,sql,database,hibernate,hql,Java,Sql,Database,Hibernate,Hql,我是一个部分UI开发人员,现在我需要转入Hibernate开发。今天,当我尝试使用UNION ALL时,HQL出现了一个问题,以下是HQL: SELECT COUNT(DISTINCT users.userId) AS totalSize FROM (SELECT DISTINCT d1.sponsor.id AS userId FROM Dating d1 WHERE d1.invitee.id = ? UNION ALL SELECT DISTINCT d2.invitee.id AS
SELECT COUNT(DISTINCT users.userId) AS totalSize FROM (SELECT DISTINCT
d1.sponsor.id AS userId FROM Dating d1 WHERE d1.invitee.id = ? UNION ALL
SELECT DISTINCT d2.invitee.id AS userId FROM Dating d2 WHERE d2.sponsor.id = ?)
AS users
它显示如下错误:
org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: ( near line 1, column 55
然后我尝试将此HQL转换为原始SQL:
SELECT COUNT(DISTINCT users.userId) AS totalSize FROM (SELECT DISTINCT
d1.sponsorId AS userId FROM mmy_dating d1 WHERE d1.inviteeId = 6 UNION
ALL SELECT DISTINCT d2.inviteeId AS userId FROM mmy_dating d2 WHERE
d2.sponsorId = 6) AS users;
它通常会显示正确的结果,所以我在想,如果Hibernate不支持UNIONALL语法
提前感谢。仍有此功能的请求。另请看一下想与大家分享的内容,在我的案例中,我发现了一种绕过这种情况的情况。 这里唯一的规则是使用相同的类型,在本例中,对应于返回列表的字符串可以添加任意多的表:
public List<String> findByCPForCNPJ(String query){
TypedQuery<String> ccpf = manager.createQuery("select cpf from PessoaFisica where cpf like :pCpf", String.class);
ccpf.setParameter("pCpf", "%" + query + "%");
List<String> lista1 = ccpf.getResultList();
TypedQuery<String> ccnpj = manager.createQuery("select cnpj from PessoaJuridica where cnpj like :pCnpj", String.class);
ccnpj.setParameter("pCnpj", "%" + query + "%");
lista1.addAll(ccnpj.getResultList());
return lista1;
}
公共列表findByCPForCNPJ(字符串查询){
TypedQuery ccpf=manager.createQuery(“从PessoaFisica中选择cpf,其中cpf类似于:pCpf”,String.class);
ccpf.setParameter(“pCpf”、“%”+query+“%”);
List lista1=ccpf.getResultList();
TypedQuery ccnpj=manager.createQuery(“从PessoaJuridica中选择cnpj,其中cnpj类似于:pCnpj”,String.class);
ccnpj.setParameter(“pCnpj”、“%”+query+“%”);
addAll(ccnpj.getResultList());
返回列表1;
}
我希望我贡献了一点,祝大家好运…我使用纯SQL而不是HQL来实现它。@BradyChu如果您使用纯SQL,那么您可以使用本机SQL而不是HQL。