如何在HQL中的HAVING COUNT（）中使用CASE？

Question

我在PostgreSQL客户端控制台中测试了以下SQL查询，该工作正常：

SELECT document_url FROM signature_transaction WHERE app_id = 2 GROUP BY document_url HAVING COUNT(CASE WHEN response_delivered THEN 1 ELSE 0 END) = COUNT(id);

然后我尝试使用像这样的NamedQuery在Java代码中做同样的事情：

SELECT t.documentUrl FROM SignatureTransaction t WHERE t.appId = :appId GROUP BY t.documentUrl HAVING COUNT(CASE WHEN t.responseDelivered THEN 1 ELSE 0 END) = COUNT(t.id)

但是在部署应用程序时收到以下错误：

ERROR [org.hibernate.internal.SessionFactoryImpl] (ServerService Thread Pool -- 86) HHH000177: 
Error in named query: SignatureTransaction.findUrlOfDeliveredDocuments: 
org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected AST node: responseDelivered near line 1, column 133 
[SELECT t.documentUrl FROM org.app.model.SignatureTransaction t WHERE t.appId = :appId GROUP BY t.documentUrl HAVING COUNT(CASE WHEN responseDelivered THEN 1 ELSE 0 END) = COUNT(t.id)]

我试图在COUNT（）中使用所有这些名称，没有工作：

• responseDelivered
• t.responseDelivered
• response_delivered
• org.app.model.SignatureTransaction.responseDelivered

编写此HQL的正确方法是什么？

Answer 1

尝试检查SignatureTransaction实体是否具有responseDelivered字段并正确设置其名称。注意HSQL在实体中看不到表名列的名称字段，这很重要。