[英]Spark-SQL Query Hints for Join Performance Improvement
I have recently been introduced to SparkSQL
.我最近被介绍给
SparkSQL
。 We use Spark 2.4
.我们使用
Spark 2.4
。 I recently found out that SparkSQL
query supports the following hints for its Join strategies:我最近发现
SparkSQL
查询的 Join 策略支持以下提示:
Unfortunately, I have not found any online materials which elaborately discuss these hints and their application scenarios.不幸的是,我没有找到任何在线资料详细讨论这些提示及其应用场景。 I wish to learn some tips regarding when to use these hints in a query Join for improving query performance.
我希望了解一些关于何时在查询 Join 中使用这些提示以提高查询性能的技巧。
Can anyone explain with some examples.任何人都可以用一些例子来解释。 Any help is appreciated.
任何帮助表示赞赏。 Thanks
谢谢
there are some post,Hope it help you: Spark SQL Joins Sort-Merge Join有一些帖子,希望对你有所帮助: Spark SQL Joins Sort-Merge Join
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