hi experts

recently we need to enable "replace" function for our customer, like
replacing all the X with Y in "123X456X". According to
https://calcite.apache.org/docs/reference.html the replace function seems
not implemented. I see there's another function called "OVERLAY", however
it's replacing with "index" instead of a "pattern".

Is there any plans to support replace function? Do I have to implement a
UDF by myself now?​

-- 
Regards,

*Bin Mahone | 马洪宾*

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