fff8d7ee6c
This PR fixes the problem reported by Justin Yip in the thread 'NullPointerException with functions.rand()'
Tested using spark-shell and verified that the following works:
sqlContext.createDataFrame(Seq((1,2), (3, 100))).withColumn("index", rand(30)).show()
Author: tedyu <yuzhihong@gmail.com>
Closes #6793 from tedyu/master and squashes the following commits:
62fd97b [tedyu] Create RandomSuite
750f92c [tedyu] Add test for Rand() with seed
a1d66c5 [tedyu] Fix NullPointerException with functions.rand()
(cherry picked from commit
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