Google cloud platform 无法从数据流SQL访问BigQuery

我正在尝试将pubsub中的一些数据与bigquery表连接起来

select 
  st.*,
  wo.workorder
from pubsub.topic.newcobi.sensor_ticks as st
left join 
  bigquery.table.newcobi.masterdata.workorders as wo on st.machine_id = wo.machine

这应该与google教程上的示例非常相似。但它总是在以下方面失败：

Error message from worker: java.io.IOException: Failed to start reading from source: org.apache.beam.runners.core.construction.UnboundedReadFromBoundedSource$BoundedToUnboundedSourceAdapter@6283e583 
org.apache.beam.runners.dataflow.worker.WorkerCustomSources$UnboundedReaderIterator.start(WorkerCustomSources.java:792)
(...)
Caused by: java.lang.UnsupportedOperationException: BigQuery storage source must be split before reading 
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageSourceBase.createReader(BigQueryStorageSourceBase.java:169) 
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageTableSource.createReader(BigQueryStorageTableSource.java:43) 
(...)

无论我将结果写入bigquery还是pubsub，都会发生这种情况。那么：在阅读之前，我如何拆分表格

谢谢

---

Stefan

只是确认一下-您是从Dataflow SQL UI执行此操作的吗？另外，您的BQ表的大小是多少？这个问题有任何更新吗？只是确认一下-您是从Dataflow SQL UI执行此操作的吗？还有，你的BQ表有多大？这个问题有更新吗？