I have recently been introduced to SparkSQL
. We use Spark 2.4
. I recently found out that SparkSQL
query supports the following hints for its Join strategies:
Unfortunately, I have not found any online materials which elaborately discuss these hints and their application scenarios. I wish to learn some tips regarding when to use these hints in a query Join for improving query performance.
Can anyone explain with some examples. Any help is appreciated. Thanks
there are some post,Hope it help you: Spark SQL Joins Sort-Merge Join
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