Github user liancheng commented on the pull request:
https://github.com/apache/spark/pull/6796#issuecomment-116879298
@rtreffer Yeah, it's intended. As explained above, this feature flag must
be set to `false` for now because the write path hasn't been refactored to
respect the Parquet format spec. If we turn this on, `CatalystSchemaConverter`
will generate standard Parquet schema while the write path still writes data
conforming to the old legacy format, which leads to data corruption.
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