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Posted to github@arrow.apache.org by "tustvold (via GitHub)" <gi...@apache.org> on 2023/11/01 17:17:52 UTC

Re: [PR] Read only enough bytes to infer Arrow IPC file schema via stream [arrow-datafusion]

tustvold commented on PR #7962:
URL: https://github.com/apache/arrow-datafusion/pull/7962#issuecomment-1789347016

   FWIW for consistency we might want to do something closer to what we do for parquet where:
   
   * We have an estimate of the size of the footer which we fetch
   * We read the actual footer size
   * We then fetch any extra data needed
   * Once decoded the footer provides information on the schema and where the data blocks are located
   
   This PR instead appears to read the first RecordBatch, whilst I _think_ this should work (provided the file contains data), the more standard approach might be to read the footer.
   


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