这个问题在这里已有答案:
我想用INNER JOIN实现JPA查询。我试过这个:
@Override
public Optional<PaymentTransactions> paymentTransactionByWpfPaymentId(Integer id) {
String hql = "SELECT t.* FROM " + PaymentTransactions.class.getName() + " t "
+ " INNER JOIN " + WpfPaymentPaymentTransactions.class.getName() + " wppt "
+ " ON t.id = wppt.payment_transaction_id "
+ " WHERE wppt.wpf_payment_id = :id "
+ " ORDER BY t.id ASC LIMIT 1";
TypedQuery<PaymentTransactions> query = entityManager.createQuery(hql, PaymentTransactions.class).setParameter("id", id);
List<PaymentTransactions> wpfPayments = query.getResultList();
return wpfPayments.isEmpty() ? Optional.empty() : Optional.of(wpfPayments.get(0));
}
但是当我运行代码时出现此错误:
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: expecting IDENT, found '*' near line 1, column 10 [SELECT t.* FROM org.datalis.plugin.entity.PaymentTransactions t INNER JOIN org.datalis.plugin.entity.WpfPaymentPaymentTransactions wppt ON t.id = wppt.payment_transaction_id WHERE wppt.wpf_payment_id = :id ORDER BY t.id ASC LIMIT 1]
你知道我如何解决这个问题以及导致这个问题的原因吗?
可能我需要实现Spring Repository并进行本机查询?
用t.*
替换t
。
您希望返回PaymentTransactions
对象,而不是其字段的值。
HQL也不是SQL,它不支持*
。