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https://issues.apache.org/jira/browse/PARQUET-191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14337819#comment-14337819
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Ryan Blue commented on PARQUET-191:
-----------------------------------
Implemented in [PR
#126|https://github.com/apache/incubator-parquet-mr/pull/126].
> Avro schema conversion incorrectly converts maps with nullable values.
> ----------------------------------------------------------------------
>
> Key: PARQUET-191
> URL: https://issues.apache.org/jira/browse/PARQUET-191
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Affects Versions: 1.5.0
> Reporter: Ryan Blue
> Fix For: 1.6.0
>
>
> The current conversion from a Parquet type to an Avro schema doesn't preserve
> optional map types. This doesn't affect deserialization, so nullable map
> values will have a non-null Avro schema but may have null values.
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