Add caching to json_tuple
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Key: HIVE-2607
URL: https://issues.apache.org/jira/browse/HIVE-2607
Project: Hive
Issue Type: Improvement
Reporter: Kevin Wilfong
Assignee: Kevin Wilfong
get_json_object uses a variety of caches to improve its performance.
json_tuple could benefit from having a similar cache from JSON string to
JSONObject.
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