[GitHub] [arrow] wgtmac commented on issue #35304: [Python] Read ORC metadata

["wgtmac (via GitHub)" <gi...@apache.org>]

wgtmac commented on issue #35304:
URL: https://github.com/apache/arrow/issues/35304#issuecomment-1538516563

   > In C++, there is a `ORCFileReader::ReadMetadata()`, which is exposed as the `metadata` property in the Python `ORCReader`. Does that already give the relevant information, or is this a different set of metadata? (I know that arrow and parquet also both have file-level metadata as field-level metadata, so the same might be the case here)
   > 
   > I see that the ORC C++ `orc::Type` has a `getAttributeKeys`, and the proto spec has an `attributes` field for a Type (https://github.com/apache/orc/blob/cd79029e41e9cfe434529f820e73900e6a72797e/proto/orc_proto.proto#L226). Is this the information that you looking for?
   
   I think @Fokko is looking for a way to expose `attributes` from ORC. `attributes` store the information about column field-id defined by Apache Iceberg.


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