comphead commented on issue #3646:
URL:
https://github.com/apache/datafusion-comet/issues/3646#issuecomment-4016959016
I tried to replace `.equals_datatype` to `.contains` which is more
nullability friendly however it would still doesn't work this scenario.
`.contains` ignores nullability if the primary datatype is nullable, but
` let data_type = args[0].data_type();` doesn't guarantee exactly this
datatype would be nullable.
I feel we can tweak `check_datatype` and if incoming datatypes are lists
then take first NULLABLE datatype instead of just first
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