[GitHub] [pinot] walterddr opened a new issue, #8597: [Feature] create FunctionRegistry based on argument type not argument count

[GitBox <gi...@apache.org>]

walterddr opened a new issue, #8597:
URL: https://github.com/apache/pinot/issues/8597

   Currently Pinot's [FunctionRegistry](https://github.com/apache/pinot/blob/89836a57c0d2346e4a04d43c8a9d8ef1e7900b18/pinot-common/src/main/java/org/apache/pinot/common/function/FunctionRegistry.java) registers and looks up function based on name and function argument count. this causes problem that we can't register 2 function with the same name but different function argument type. for example `sum(int, int)` and `sum(long, long)` 
   
   Propose to change a FunctionRegistry to accept lookup based on argument type.
   -  `Map<String, Map<Integer, FunctionInfo>> FUNCTION_INFO_MAP;` will be changed to be of type: `Map<String, Map<Collection<DataType>, FunctionInfo>>`.
   - Lookup will now support both argument count and argument type list.
   
   Note: this depends on LiteralContext in #8596 as there's backward incompatible Literal argument type issue
   


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