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https://issues.apache.org/jira/browse/PARQUET-113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14295949#comment-14295949
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Ryan Blue commented on PARQUET-113:
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Thanks, [~spena]! It looks like we need to add another backward-compatibility
rule to the spec for maps written with Hive. I think all we would need to do is
require that MAP_KEY_VALUE can be used in place of the MAP annotation.
> Clarify parquet-format specification for LIST and MAP structures.
> -----------------------------------------------------------------
>
> Key: PARQUET-113
> URL: https://issues.apache.org/jira/browse/PARQUET-113
> Project: Parquet
> Issue Type: Bug
> Components: parquet-format, parquet-mr
> Reporter: Ryan Blue
> Assignee: Ryan Blue
>
> There are incompatibilities in the way that some parquet object models
> translate nested structures annotated by LIST and MAP / MAP_KEY_VALUE. We
> need to define clearly what the structures should look like and how to
> interpret existing structures, including what must be supported to read
> current parquet-avro, parquet-thrift, etc. files.
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