dilipbiswal commented on issue #23769: [SPARK-26864][SQL] Query may return incorrect result when python udf is used as a join condition and the udf uses attributes from both legs of left semi join. URL: https://github.com/apache/spark/pull/23769#issuecomment-463527513 @cloud-fan I was thinking about this and have a question. Now that we only support only inner joins and also it requires an user intervention to explicitly turn on cross join, is it worth having a dedicated optimizer rule and tests for this functionality ? Just wanted to know your thoughts on this.
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