java - HIbernate HQL 意外 token

Question

我有以下 Hibernate 查询:

String HSQL = "from Page as p "
  + "where not exists (from Link as l where l.dealId = p.id) "
  + "and p.userId = :userId";

return (List<Deal>) sessionFactory.getCurrentSession()
  .createQuery(HSQL)
  .setParameter("userId", userId)
  .list();

但是在方法 .createQuery(HSQL) 上失败并出现以下异常

[ ERROR ] [12.11.2019 13:19:10] --- U: I: S: --- org.hibernate.hql.internal.ast.ErrorTracker: line 1:137: unexpected token: .
[ ERROR ] [12.11.2019 13:19:10] --- U: I: S: --- org.hibernate.hql.internal.ast.ErrorTracker: line 1:137: unexpected token: .
antlr.NoViableAltException: unexpected token: .
    at org.hibernate.hql.internal.antlr.HqlBaseParser.fromClassOrOuterQueryPath(HqlBaseParser.java:1972) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.fromRange(HqlBaseParser.java:1499) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.fromClause(HqlBaseParser.java:1343) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectFrom(HqlBaseParser.java:1063) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:748) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.subQuery(HqlBaseParser.java:3910) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.quantifiedExpression(HqlBaseParser.java:3515) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.unaryExpression(HqlBaseParser.java:3373) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
    at org.hibernate.hql.internal.antlr.HqlBaseParser.multiplyExpression(HqlBaseParser.java:3273) [hibernate-core-5.4.1.Final.jar:5.4.1.Final]
...

我的 Hibernate 版本是 5.4.1。

查询有什么问题？

Answer 1

我认为在您的实体中 dealId 是 Page 类型而不是 Long 类型，因此您可以使用:

"where not exists (from Link as l where l.dealId = p) "
                                        ^^^^^^^^^^^^