Ted-Jiang commented on PR #2177:
URL:
https://github.com/apache/arrow-datafusion/pull/2177#issuecomment-1109783993
@alamb @thinkharderdev @doki23 i met the same problem in #2343
if we treat it as a `Expr` , we need change it to `PhysicalExpr` but
``` rust
/// Evaluate an expression against a RecordBatch
fn evaluate(&self, batch: &RecordBatch) -> Result<ColumnarValue>;
```
```rust
pub enum ColumnarValue {
/// Array of values
Array(ArrayRef),
/// A single value
Scalar(ScalarValue),
}
```
cause of it return ColumnarValue, we can not return result as a table, am i
right?
Should i implement a `TablePhysicalExpr`
using
```rust
fn evaluate(&self, batch: &RecordBatch) -> Result<Vec<ColumnarValue>>;
```
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