| 类型: | bool |
| 默认: | off |
| 上下文: | user |
| 重新开始: | false |
| 以来: | 11 |
允许或者禁止查询规划器使用面向分区的分组或聚集，这使得在分区表上的分组或聚集可以在每个分区上分别执行。如果GROUP BY子句不包括分区键，只有部分聚集能够以基于每个分区的方式执行，并且finalization必须最后执行。由于面向分区的分组或聚集在规划期间会使用可观的CPU时间和内存，所以默认值为off。
在 StackOverflow
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- Java Hibernate insert hypertable in timescaledb is very slow
- Why does "explain analyzing" this query fnish fast (showing a parallel plan), while running the actual query without "explain analyze" doesn't?