spark `char` need to have custom nullability

[rluvaton]

Describe the bug

the UDF uses the default is_nullable which is always true which is not the case

To Reproduce

No response

Expected behavior

No response

Additional context

No response

[Rohita-29]

take

[skushagra]

Hi @Rohita-29,

Let me know if you are working on this. I have a PR ready for this, sorry accidently missed this comment. 😅

[Rohita-29]

Hi Kushagra, Please go ahead with it if a PR is already available.

On Wed, Dec 10, 2025 at 1:10 AM Kushagra S @.***> wrote:

skushagra left a comment (apache/datafusion#19170) https://github.com/apache/datafusion/issues/19170#issuecomment-3633965654

Hi @Rohita-29 https://github.com/Rohita-29,

Let me know if you are working on this. I have a PR ready for this, sorry accidently missed this comment. 😅

— Reply to this email directly, view it on GitHub https://github.com/apache/datafusion/issues/19170#issuecomment-3633965654, or unsubscribe https://github.com/notifications/unsubscribe-auth/BP2CA6PR6X5GEITPVY7E2KD4A4QRNAVCNFSM6AAAAACOJM3VI2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMZTHE3DKNRVGQ . You are receiving this because you were mentioned.Message ID: @.***>

[skushagra]

Great! Will do then..