N Campbell created HIVE-3185:
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Summary: allow union set operation without ALL keyword (align to
ISO-SQL 2012 specification)
Key: HIVE-3185
URL: https://issues.apache.org/jira/browse/HIVE-3185
Project: Hive
Issue Type: Improvement
Affects Versions: 0.8.0
Reporter: N Campbell
Allow a union operation to be specified as <qb1> union <qb2> in addition to th
<qb1> union all <qb2>
Common requirement of queries to project two sets where it is not always the
case you want distinct rows in the set. Failing to do so obviously will result
in the current exception:
mismatched input 'select' expecting ALL near 'union' in query operator
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