alamb commented on code in PR #3703:
URL: https://github.com/apache/arrow-datafusion/pull/3703#discussion_r989016120
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datafusion/optimizer/src/unwrap_cast_in_comparison.rs:
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@@ -122,10 +122,6 @@ impl ExprRewriter for UnwrapCastExprRewriter {
let right = right.as_ref().clone();
let left_type = left.get_type(&self.schema);
let right_type = right.get_type(&self.schema);
- // can't get the data type, just return the expr
- if left_type.is_err() || right_type.is_err() {
- return Ok(expr.clone());
- }
Review Comment:
> Why we need to remove this code? @alamb
My thinking was that any such error is the result of some other issue with
the planning or other pass; Thus, if we ignore the error in the
`UnwrapCastExprRewriter` pass we make it harder to find and debug the real
underlying problem.
It also has no test coverage (no test fails when this code is removed) which
also makes me think all it will do is make debugging future errors harder
@liukun4515 if you think strongly this code should still be here it is fine
with me and I will close the PR
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