tustvold commented on code in PR #6818:
URL: https://github.com/apache/arrow-datafusion/pull/6818#discussion_r1251657851
##########
datafusion/expr/src/built_in_function.rs:
##########
@@ -895,15 +894,37 @@ impl BuiltinScalarFunction {
],
self.volatility(),
),
- BuiltinScalarFunction::DateTrunc => Signature::one_of(
- vec![
- Exact(vec![Utf8, Timestamp(Nanosecond, None)]),
- Exact(vec![Utf8, Timestamp(Microsecond, None)]),
- Exact(vec![Utf8, Timestamp(Millisecond, None)]),
- Exact(vec![Utf8, Timestamp(Second, None)]),
- ],
- self.volatility(),
- ),
+ BuiltinScalarFunction::DateTrunc => {
+ let time_zones = vec![
Review Comment:
FWIW this issue also arises for decimal types, I suspect that the current
pattern of explicitly listing the possible type signatures is going to require
revisiting. We probably want to extend the pattern established in #6778 and
allow functions to return a signature given a set of input types.
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