Jefffrey commented on issue #19004:
URL: https://github.com/apache/datafusion/issues/19004#issuecomment-3635593713
I'll add on to this issue, we should look into improving the error message
when using coercion API too. For example:
```sql
> select log('');
Error during planning: Internal error: Function 'log' failed to match any
signature, errors: Internal error: Expect TypeSignatureClass::Decimal but
received NativeType::String, DataType: Utf8.
This issue was likely caused by a bug in DataFusion's code. Please help us
to resolve this by filing a bug report in our issue tracker:
https://github.com/apache/datafusion/issues,Internal error: Expect
TypeSignatureClass::Float but received NativeType::String, DataType: Utf8.
This issue was likely caused by a bug in DataFusion's code. Please help us
to resolve this by filing a bug report in our issue tracker:
https://github.com/apache/datafusion/issues,Error during planning: Function
'log' expects 2 arguments but received 1,Error during planning: Function 'log'
expects 2 arguments but received 1.
This issue was likely caused by a bug in DataFusion's code. Please help us
to resolve this by filing a bug report in our issue tracker:
https://github.com/apache/datafusion/issues No function matches the given name
and argument types 'log(Utf8)'. You might need to add explicit type casts.
Candidate functions:
log(Coercion(TypeSignatureClass::Decimal))
log(Coercion(TypeSignatureClass::Float,
implicit_coercion=ImplicitCoercion([Numeric], default_type=Float64))
log(Coercion(TypeSignatureClass::Float,
implicit_coercion=ImplicitCoercion([Numeric], default_type=Float64),
Coercion(TypeSignatureClass::Decimal))
log(Coercion(TypeSignatureClass::Float,
implicit_coercion=ImplicitCoercion([Numeric], default_type=Float64),
Coercion(TypeSignatureClass::Float,
implicit_coercion=ImplicitCoercion([Numeric], default_type=Float64))
```
It's not very readable, and it includes `InternalError` which is not right
in terms of semantics.
This can be tackled as a separate task, with this issue as a wider tracking
issue.
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