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Wenchen Fan updated SPARK-29954:
Parent Issue: SPARK-31412 (was: SPARK-29544)
> collect the runtime statistics of row count in
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https://issues.apache.org/jira/browse/SPARK-29954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ke Jia updated SPARK-29954:
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Description: We need the row count info to more accurately estimate the
data skew situation when too many
