Jefffrey opened a new issue, #5473:
URL: https://github.com/apache/arrow-datafusion/issues/5473
**Describe the bug**
A clear and concise description of what the bug is.
Cannot do `count(Expr::Wildcard)` aggregate with DataFrame API
**To Reproduce**
Steps to reproduce the behavior:
```rust
ctx.table("alltypes_plain")
.await?
.aggregate(vec![], vec![count(Expr::Wildcard)])?
.explain(false, false)?
.show()
.await?;
```
Throws error:
`Error: Internal("Wildcard expressions are not valid in a logical query
plan")`
**Expected behavior**
A clear and concise description of what you expected to happen.
Should be like when doing SQL:
```rust
ctx.sql("select count(*) from alltypes_plain")
.await?
.explain(false, false)?
.show()
.await?;
```
Gives plan:
```
+---------------+---------------------------------------------------+
| plan_type | plan |
+---------------+---------------------------------------------------+
| logical_plan | Aggregate: groupBy=[[]], aggr=[[COUNT(UInt8(1))]] |
| | TableScan: alltypes_plain projection=[id] |
| physical_plan | ProjectionExec: expr=[7300 as COUNT(UInt8(1))] |
| | EmptyExec: produce_one_row=true |
| | |
+---------------+---------------------------------------------------+
```
Where `count(*)` has been transformed to `count(1)` essentially.
**Additional context**
Add any other context about the problem here.
Expansion substitute:
https://github.com/apache/arrow-datafusion/blob/e9852074bacd8c891d84eba38b3417aa16a2d18c/datafusion/expr/src/utils.rs#L43-L45
See SQL substitute function:
https://github.com/apache/arrow-datafusion/blob/e9852074bacd8c891d84eba38b3417aa16a2d18c/datafusion/sql/src/expr/function.rs#L193-L218
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