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https://issues.apache.org/jira/browse/IMPALA-12631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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YifanZhang resolved IMPALA-12631.
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Fix Version/s: Impala 4.4.0
Resolution: Fixed
> 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
> Priority: Major
> Fix For: Impala 4.4.0
>
>
> 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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