Implement NULL-safe equality operator <=>
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Key: HIVE-2810
URL: https://issues.apache.org/jira/browse/HIVE-2810
Project: Hive
Issue Type: New Feature
Components: Query Processor, UDF
Reporter: Carl Steinbach
Ref:
http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html#operator_equal-to
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