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Posted to github@arrow.apache.org by "r4ntix (via GitHub)" <gi...@apache.org> on 2023/03/16 11:39:57 UTC

[GitHub] [arrow-datafusion] r4ntix commented on issue #5466: Rework `ParquetExec::metadata_size_hint`

r4ntix commented on issue #5466:
URL: https://github.com/apache/arrow-datafusion/issues/5466#issuecomment-1471796131

   Great suggestion.
   But in addition to moving `metadata_size_hint` to `PartitionedFile`, we also need to consider how to get `metadata_size_hint` value in `infer_schema` and `infer_stats` functions of `ParquetFormat`.
   https://github.com/apache/arrow-datafusion/blob/258af4bf69758b6307d191f072ba88a7b847fbe5/datafusion/core/src/datasource/file_format/parquet.rs#L143-L185
   
   Maybe we need to extend `ObjectMeta` in arrow-rs/object_store repo, such as adding an `extensions` field for user defined per object metadata? 
   @tustvold could you provide some suggestions?


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