google-bigquery - BigQuery 执行计划中的 PARTITION 是什么？

Question

在执行查询时，在 BigQuery 执行计划中，我得到了名为“ REPARTITION ”的新阶段

任何人都可以帮助我理解“重新分区”一词的含义。

您可以引用下图了解更多详情。

REPARTITION

Answer 1

来自 documentation :

Another important property of the query execution architecture is that it is dynamic, which means that the query plan may be modified while a query is in flight. Stages that are introduced while a query is running are often used to improve data distribution throughout query workers. In query plans where this occurs, these are typically labeled as Repartition stages.