Github user davies commented on the issue: https://github.com/apache/spark/pull/15089 @JoshRosen Answer your questions here: 1. This is special designed for Python UDF (we do not have similar requirement in other place), I'd not to make it general without have a real use case from other places. 2. Since we already have page pool, so I did not try to re-use the page here (will be more complicated).
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