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From felixcheung <>
Subject [GitHub] spark issue #15493: [SPARK-17946][PYSPARK] Python crossJoin API similar to S...
Date Sun, 16 Oct 2016 04:10:48 GMT
Github user felixcheung commented on the issue:
    That's a great point. Currently R is the same as Python in that when `joinExpr` is `NULL`
(R) or `on` is `None` (Python), CrossJoin is assumed. (Python [here](
    Problem is by default `joinExpr = NULL` (R) and `on = None` (Python) - one approach is
to change both defaults, so that when omitted, they don't default to CrossJoin.
    Another approach is to additional ask for `joinType` or `how` of a new `cross_join` -
but this could be a bigger change.

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