AdamGS commented on issue #20135:
URL: https://github.com/apache/datafusion/issues/20135#issuecomment-4464327970
I think I have a an impl that at least passes tests, but one thing I've run
into is that the UDF is `Volatile`, but than means that it won't be pushed down
into the scan if it isn't actively projected (like in `SELECT column1
FROM parquet_table
WHERE file_row_index() > 2`) regardless of placement, WDYT about allowing
volatile expressions to be pushed down if their placement indicates that it
should?
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