截至2018年10月23日，BigQuery计划的查询功能似乎不支持WRITE_TRUNCATE加载模式结合群集.

As of 23-10-2018, it seems that the BigQuery scheduled query functionality does NOT support the WRITE_TRUNCATE loading pattern in combination with clustering.

确实起作用的工作是使用DML语句写入集群目标表.

What DOES work however, is writing to a clustered target table using a DML statement.