isEmptyPath() to use ContentSummary cache
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Key: HIVE-2030
URL: https://issues.apache.org/jira/browse/HIVE-2030
Project: Hive
Issue Type: Improvement
Reporter: Siying Dong
Assignee: Siying Dong
Priority: Minor
addInputPaths() calls isEmptyPath() for every input path. Now every call is a
DFS namenode call. Making isEmptyPath() to use cached ContentSummary, we should
be able to avoid some namenode calls and reduce latency in the case of multiple
partitions.
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