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Sort-merge join is more robust in Spark since sorting can be made using the Tungsten sort operator. Author: Reynold Xin <rxin@databricks.com> Closes #7733 from rxin/smj and squashes the following commits: 61e4d34 [Reynold Xin] Fixed test case. 5ffd731 [Reynold Xin] Fixed JoinSuite. a137dc0 [Reynold Xin] [SPARK-9418][SQL] Use sort-merge join as the default shuffle join. |
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