Matt McCline created HIVE-19116:
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Summary: Vectorization: Vector Map data type doesn't keep the
order of the key/values pairs as read
Key: HIVE-19116
URL: https://issues.apache.org/jira/browse/HIVE-19116
Project: Hive
Issue Type: Bug
Components: Hive
Affects Versions: 3.0.0
Reporter: Matt McCline
Assignee: Matt McCline
The VectorExtractRow class does not preserve the order of the key/value pairs
when going from MapColumnVector to a Map object. This causes Q file
differences in tests with the MAP data type making it seem like we are getting
Wrong Results (well, actually we are).
When LazyMap class (for example) adds key/value pairs to its "map" it uses a
LinkedHashSet to preserve insert order.
FYI: [~teddy.choi]
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