Riza Suminto created IMPALA-12847:
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Summary: Make computeScanRangeLocations and computeStats
idempotent in HdfsScanNode.java
Key: IMPALA-12847
URL: https://issues.apache.org/jira/browse/IMPALA-12847
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Riza Suminto
Assignee: Riza Suminto
After IMPALA-12631, HdfsScanNode.computeScanRangeLocations() need check if
countStarSlot_ is null or not to schedule footer range only.
HdfsScanNode.computeScanRangeLocations() is called along with
HdfsScanNode.init() call.
An external frontend that has its own count star slot analysis and
initialization will need to recompute scan range assignment and stats after
HdfsScanNode.init(). Therefore, computeScanRangeLocations() and computeStats()
should be made idempotent after init() and exposed to subclasses.
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