Ron Hu created SPARK-21322:
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Summary: support histogram in filter cardinality estimation
Key: SPARK-21322
URL: https://issues.apache.org/jira/browse/SPARK-21322
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 2.1.0
Reporter: Ron Hu
Histogram is effective in dealing with skewed distribution. After we generate
histogram information for column statistics, we need to adjust filter
estimation based on histogram data structure.
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