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https://issues.apache.org/jira/browse/SPARK-3609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14141493#comment-14141493
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Apache Spark commented on SPARK-3609:
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User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/2468
> Add sizeInBytes statistics to Limit operator
> --------------------------------------------
>
> Key: SPARK-3609
> URL: https://issues.apache.org/jira/browse/SPARK-3609
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.1.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
>
> The {{sizeInBytes}} statistics of a {{LIMIT}} operator can be estimated
> fairly precisely when all output attributes are of native data types, all
> native data types except {{StringType}} have fixed size. For {{StringType}},
> we can use a relatively large (say 4K) default size.
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