Zoltan Haindrich created HIVE-25748:
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Summary: Investigate Union comparision
Key: HIVE-25748
URL: https://issues.apache.org/jira/browse/HIVE-25748
Project: Hive
Issue Type: Improvement
Reporter: Zoltan Haindrich
both of the following cases change the "non-used" part of the union (note:
`create_union(idx,o0,o1)` creates a union which uses the `idx`-th object)
{code}
SELECT (NULLIF(create_union(0,1,2),create_union(0,1,3)) is not null);
false
SELECT (NULLIF(create_union(0,1,2),create_union(1,2,1)) is not null);
true
{code}
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