我正在尝试运行此查询，这将使我计数
但它确实有效

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); 

请您参考如下方法:

这可能会有所帮助:

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