Allow ARRAY_CONTAINS to be used as join key
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Key: HIVE-1919
URL: https://issues.apache.org/jira/browse/HIVE-1919
Project: Hive
Issue Type: Improvement
Reporter: Adam Kramer
Using ARRAY_CONTAINS(b.haystack, a.needle) fails with the "Both Left and Right
Aliases Encountered in Join" error. But, it doesn't have to...it is effectively
an equi-join, just more complicated. The appropriate functionality can be
attained using EXPLODE and GROUP BY, but that is ridiculous in terms of amount
of work generated for the cluster.
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