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https://issues.apache.org/jira/browse/PARQUET-1990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17312404#comment-17312404
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Antoine Pitrou commented on PARQUET-1990:
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WTH #2, https://github.com/apache/parquet-cpp/pull/360 added a converted type
named "NA" in order to serialize Arrow null arrays.
https://github.com/apache/parquet-format/pull/45 added a converted type named
"NA" in the Thrift definition.
https://github.com/apache/parquet-format/pull/51 then removed the converted
type "NA" (before it was released) and replaced it with the logical type
"NullType". But the Parquet C++ implementation wasn't updated to also remove
"NA".
> [C++] ConvertedType::NA is written out in some cases
> -----------------------------------------------------
>
> Key: PARQUET-1990
> URL: https://issues.apache.org/jira/browse/PARQUET-1990
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-cpp
> Reporter: Micah Kornfield
> Assignee: Micah Kornfield
> Priority: Major
>
> This makes it an invalid thrift enum. ::NA is a placeholder enum internal to
> C++. There will right out an enum value of 24 to thrift which can cause
> errors for other readers. See:
> https://issues.apache.org/jira/browse/ARROW-10553
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