Github user cloud-fan commented on the pull request:
https://github.com/apache/spark/pull/10128#issuecomment-161626933
I think it's not a good example to show that we need to allow
nondeterministic expressions in join codition. We can use `Repartition`
operator to fix data skew, like
`sqlContext.table(tblName).repartition(numPartitions).registerTempTable`, which
looks better than your random join approach. Do you find other cases that need
to use nondeterministic expressions in join codition?
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