LiaCastaneda commented on issue #17508:
URL: https://github.com/apache/datafusion/issues/17508#issuecomment-3564080258
> making CAST(B.C as Utf8) have qualified name ("B", "C")
IIRC two columns with the same qualified name and same field name, might
result in an schema error as well during logical planning (see
[here](https://github.com/apache/datafusion/blob/e6ddb48f4017fdd7f94ff360695514934f4a5823/datafusion/common/src/dfschema.rs#L233)).
> OR making it so that unaliased CASTs do appear in the field name in the
schema, something like B.C::TEXT
if we had
```
SELECT
CAST(B.C as TEXT),
CAST(B.C as TEXT)
FROM table
```
could it still conflict?
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