jiacai2050 commented on issue #2994:
URL:
https://github.com/apache/arrow-datafusion/issues/2994#issuecomment-1202540912
alias is one potential solution, when I debug this issue, I find something
strange:
```diff
modified datafusion/expr/src/expr_schema.rs
@@ -223,9 +223,9 @@ impl ExprSchemable for Expr {
)),
_ => Ok(DFField::new(
None,
- &self.name(input_schema)?,
- self.get_type(input_schema)?,
- self.nullable(input_schema)?,
+ &self.name(input_schema).unwrap(),
+ self.get_type(input_schema).unwrap(),
+ self.nullable(input_schema).unwrap(),
)),
}
```
datafusion panic at `self.get_type()` not `self.name()`, if the rewritten
schema is incomplete, why would `self.name` success?
It seems a little strange that `self.name` and `self.get_type` have
different behavior.
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