Davies Liu created SPARK-13213:
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Summary: BroadcastNestedLoopJoin is very slow
Key: SPARK-13213
URL: https://issues.apache.org/jira/browse/SPARK-13213
Project: Spark
Issue Type: Improvement
Reporter: Davies Liu
Since we have improve the performance of CartisianProduct, which should be
faster and robuster than BroacastNestedLoopJoin, we should do CartisianProduct
instead of BroacastNestedLoopJoin, especially when the broadcasted table is
not that small.
Today, we hit a query that take very long time but still not finished, once
decrease the threshold for broadcast (disable BroacastNestedLoopJoin), it just
finished in seconds.
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