alamb commented on issue #2041:
URL:
https://github.com/apache/arrow-datafusion/issues/2041#issuecomment-1073219075
FWIW I would expect this code:
```rust
let plan = LogicalPlanBuilder::scan_empty(Some("t1"), &employee_schema(),
None)?
.join_using(&t2, JoinType::Inner, vec!["id"])?
.project(vec![Expr::Wildcard])? // my question about here
.build()?;
```
To generate a DataFusionError with "Wildcard expressions are not valid in a
logical query plan"
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