alamb commented on issue #1356:
URL:
https://github.com/apache/arrow-datafusion/issues/1356#issuecomment-978309526
I agree that the `coercion` framework is a bit messy at the moment. It might
help to start refactoring by collecting the coercion logic into a single module
with some clearly defined entrypoint.
Perhaps something like
```rust
pub fn coerce_to(expr: Expr, to_type: &DataType) -> Option<Expr> {
...
}
```
With appropriate comments and tests
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