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https://issues.apache.org/jira/browse/SPARK-17073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15489326#comment-15489326
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Apache Spark commented on SPARK-17073:
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User 'wzhfy' has created a pull request for this issue:
https://github.com/apache/spark/pull/15090
> generate basic stats for column
> -------------------------------
>
> Key: SPARK-17073
> URL: https://issues.apache.org/jira/browse/SPARK-17073
> Project: Spark
> Issue Type: Sub-task
> Components: Optimizer
> Affects Versions: 2.0.0
> Reporter: Ron Hu
>
> For a specified column, we need to generate basic stats including max, min,
> number of nulls, number of distinct values, max column length, average column
> length.
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