cloud-fan commented on a change in pull request #32932:
URL: https://github.com/apache/spark/pull/32932#discussion_r656246044
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File path: docs/sql-performance-tuning.md
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@@ -228,6 +228,8 @@ The "REPARTITION_BY_RANGE" hint must have column names and
a partition number is
SELECT /*+ REPARTITION */ * FROM t
SELECT /*+ REPARTITION_BY_RANGE(c) */ * FROM t
SELECT /*+ REPARTITION_BY_RANGE(3, c) */ * FROM t
+ SELECT /*+ ADAPTIVE_REPARTITION */ * FROM t
+ SELECT /*+ ADAPTIVE_REPARTITION(c) */ * FROM t
Review comment:
I'm not good at naming, let's get more opinions. cc @dongjoon-hyun
@HyukjinKwon @maropu @viirya
Basically this hint means the user wants to add a shuffle right before data
writing, to redistribute data and avoid small files/skewed partitions. It's
different from normal repartition as this allows more aggressive optimization
from AQE.
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