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https://issues.apache.org/jira/browse/HIVE-9500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14295968#comment-14295968
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Thejas M Nair commented on HIVE-9500:
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I believe the reason why I limited it to 24 was because chars up to ascii value
24 are not likely to be seen in the data in most cases. As a result you could
get away without escaping those chars. I also felt that when dealing with
larger levels of nesting, other formats such as ORC would be a better choice.
> Support nested structs over 24 levels.
> --------------------------------------
>
> Key: HIVE-9500
> URL: https://issues.apache.org/jira/browse/HIVE-9500
> Project: Hive
> Issue Type: Improvement
> Reporter: Aihua Xu
> Labels: SerDe
>
> Currently we support up to 24 levels of nested structs when
> hive.serialization.extend.nesting.levels is set to true, while the customers
> have the requirement to support more than that.
> It would be better to make the supported levels configurable or completely
> removed (i.e., we can support any number of levels).
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