Postgresql'在hibernate中选择distinct'

Question

hibernate是否支持select distinct on query？

SELECT DISTINCT ON (location) location, time, report
FROM weather_reports
ORDER BY location, time DESC;

有没有办法为该查询创建hibernate标准？

Answer 1

既然这里有“怀疑”和“猜测”，当我偶然发现这个问题时，我肯定会回答：

不，Hibernate不支持DISTINCT ON查询。

org.hibernate.hql.internal.ast.QuerySyntaxException: 
unexpected token: ON near line 1, column 17
[SELECT DISTINCT ON (location) location, time, report FROM weather_reports ORDER BY location, time DESC]

在Hibernate 4.3.9-final下测试

请注意，这不适用于普通的DISTINCT查询。 请参阅https：//stackoverflow.com/questions/263850 ...