andygrove opened a new issue, #2319:
URL: https://github.com/apache/arrow-datafusion/issues/2319
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
I have a simple schema containing a column with the qualified name `df.a`:
``` rust
let schema = DFSchema::new_with_metadata(vec![
DFField::new(Some("df"), "a", DataType::Int64, false),
], HashMap::new())?;
```
If I attempt to look this up using `schema.index_of("df.a")` I get the very
confusing error `No field named 'df.a'. Valid fields are 'df.a'.`.
There is an `index_of_column_by_name(&self, qualifier: Option<&str>, name:
&str)` which would be a better API to call and this works as expected but it is
not public.
As a workaround I have to use
`index_of_column(&Column::from_qualified_name("df.a"))` instead, creating a
temporary data structure and invoking a tokenizer which seems heavyweight.
**Describe the solution you'd like**
My proposal would be:
- Deprecate `index_of(&self, name: &str)` and also have it return an error
if passed a qualified name
- Make `index_of_column_by_name` public
**Describe alternatives you've considered**
None
**Additional context**
None
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