YifanZhang created IMPALA-12631:
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Summary: Improve count star performance for parquet scans
Key: IMPALA-12631
URL: https://issues.apache.org/jira/browse/IMPALA-12631
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: YifanZhang
Assignee: YifanZhang
The code in the backend function HdfsParquetScanner::GetNextInternal() is not
efficient now. We use row group statistics instead of file meta statistics,
which leads to unnecessary materialization overhead.
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