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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/10/26 08:29:02 UTC

[GitHub] [arrow-rs] alanhe commented on issue #746: Examples (or guidance) on parquet usage

alanhe commented on issue #746:
URL: https://github.com/apache/arrow-rs/issues/746#issuecomment-951706502


   I’ve some doubts too.
   
   I try to write a parquet file locally. What I learned is to use `SerializedFileWriter` and manually call `next_row_group` to append data chunks.
   
   But by setting `WriterProperties::data_pagesize_limit` and `WriterProperties::max_row_group_size`, shouldn’t a writer automatically divided data into appropriate row groups? I could assume by calling `write_batch` repeatedly and the writer would take care of the details to keep it stick to the threshold values.
   
   A few more examples on read / write parquet file would be really great. Thanks! 😊


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