Extending binary operators in logical plans

[renzobautista]

Hi all, I'm currently using DataFusion to generate logical plans from a user-inputted SQL query. In my custom SQL implementation, I want to allow some binary operators (+,-,*,/) to take in strings as input (i.e. coercing Utf8 + Utf8 to Float64). Is this currently possible? I was able to customize other scalar functions and aggregations by making a UDF (e.g. for SUM, CEIL), but haven't found a way to do the same for binary operators.

[jonahgao]

Can customizing SQL planner meet your requirement? Here is an example.

[renzobautista]

i think this should work, will give it a go -- thanks @jonahgao !