Seonggon Namgung created HIVE-28800:
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Summary: Improve LongColumnStatsAggregator by preventing
overestimation of NDV
Key: HIVE-28800
URL: https://issues.apache.org/jira/browse/HIVE-28800
Project: Hive
Issue Type: Bug
Reporter: Seonggon Namgung
Assignee: Seonggon Namgung
When calculating the aggregated column statistics for a long-type column, the
estimated NDV may sometimes exceed the total number of integers within the
column’s value range. This estimated value is impossible and could lead to
incorrect optimization decisions based on the statistics.
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