当具有相同术语的HQL选择有效时,为什么此HQL删除失败？

Question

为什么以下HQL查询失败？

string hql = @"delete MyLog log
               where
                    log.UtcTimestamp < :threshold and
                    log.Configuration.Application = :application";

session.CreateQuery(hql)
       .SetDateTime("threshold", threshold)
       .SetEnum("application", this.application)
       .ExecuteUpdate();

在select中使用相同形式的查询:

string hql = @"from MyLog log
               where
                    log.UtcTimestamp < :threshold and
                    log.Configuration.Application = :application";
IList<MyLog> log = session.CreateQuery(hql)
    .SetDateTime("threshold", threshold)
    .SetEnum("application", this.application)
    .List<MyLog>();

MyLog的映射包含:

References(x => x.Configuration)
     .Columns("CONFIGURATION_ID")
     .ReadOnly();      

Configuration的映射包含:

Map(x => x.Application, "APPLICATION_ID");

我得到的错误是:

从MYLOG中删除,CONFIGURATION countercon1_,其中UTC_TIMESTAMP <:p0和APPLICATION_ID =:p1; :p0 = 04/10/2010 17:15:52,:p1 = 7

NHibernate.Exceptions.GenericADOException:无法执行更新查询[SQL:

从MYLOG,CONFIGURATION中删除countercon1_,其中UTC_TIMESTAMP <？和APPLICATION_ID =？

] ---> Oracle.DataAccess.Client.OracleException:ORA-00933:SQL命令未正确结束

Answer 1

试试这个:

delete MyLog log
where log.id in
          (select l.id
           from MyLog l
           where l.UtcTimestamp < :threshold and
           and.Configuration.Application = :application)