mmooyyii commented on code in PR #17113:
URL: https://github.com/apache/datafusion/pull/17113#discussion_r2283871618
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datafusion/functions/src/math/round.rs:
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@@ -84,9 +79,41 @@ impl ScalarUDFImpl for RoundFunc {
&self.signature
}
+ fn coerce_types(&self, arg_types: &[DataType]) -> Result<Vec<DataType>> {
Review Comment:
> why do we need a custom coerce types method? Why not just add two more
entries to the existing table of `one_of`?
The arg of `one_of` TypeSignature must have a specific typmod.
but input decimal will have about 78*78 kind of types;
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