Details
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Improvement
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Status: Open
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Major
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Resolution: Unresolved
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None
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None
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Description
Parquet files store min/max/count data in foot metadata.
When a query is submitted to a Parquet table, and stats are not available, Hive should launch a single multi-threaded processor that simply reads the meta data of each Parquet file instead of walking through every single record in the table.