Zhenhua Wang created SPARK-17129:
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Summary: support partition-level stats and cardinality estimation
Key: SPARK-17129
URL: https://issues.apache.org/jira/browse/SPARK-17129
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Zhenhua Wang
need to support generation/storing/loading partition-level statistics, and use
stats from single/multiple partitions (after partition pruning) to estimate
cardinality
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