awhyte commented on issue #1193:
URL:
https://github.com/apache/datafusion-python/issues/1193#issuecomment-3134235415
Thanks very much for the quick response, Tim.
Sadly passing `col("a").expr` as `my_lib_function(col("a").expr)` also fails
with the same message. Perhaps the build configuration was too different - I'll
take a look at that to check.
I'm not quite sure I understand what you mean by wrapping the PyExpr?
Thank you for the link and the great write-up there - I'm not sure how I
missed that previously. Would a helpful contribution here be for me to write
`FFI_` and `Foreign` implementations for expressions? The current
`datafusion-ffi` crate seems to handle expressions via protobuf serialisation
from `datafusion-proto` which doesn't seem so nice.
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