HQL错误：with-clause引用了两个不同的from子句元素

Question

我正在尝试运行此查询，这将给我计数 但它似乎确实有效

def query  = "select count(A.id) from Artifact A "+
             "LEFT JOIN A.classification C on (A.id=C.artifactId) "+
             "where C.id IS NULL";
def tc = Artifact.executeQuery(query);

Answer 1

这可能有所帮助：

def query  = "select count(A.id) from Artifact A "+
             "LEFT JOIN A.classification C "+
             "where C.id IS NULL";
def tc = Artifact.executeQuery(query);

你不需要在这里，因为神器应该已经连接了＃34;通过映射进行分类。