Weston Pace created ARROW-14010:
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Summary: [C++][Python] No way to generate UUID filenames with new
datasets API
Key: ARROW-14010
URL: https://issues.apache.org/jira/browse/ARROW-14010
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Weston Pace
Assignee: Weston Pace
I had assumed this could be done using the "partition_filename_cb" in
"pyarrow.parquet.write_to_dataset" but that doesn't work if
"use_legacy_dataset" is False. The "basename_template" only allows string
substitution so it cannot inject UUID. Given that this is the only support for
any kind of "append" mode when writing to datasets I think this feature is
important and can block migration from the old writer.
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