Dandandan commented on a change in pull request #375:
URL: https://github.com/apache/arrow-datafusion/pull/375#discussion_r637600299
##########
File path: datafusion/src/physical_plan/windows.rs
##########
@@ -57,25 +74,81 @@ pub fn create_window_expr(
name,
)?,
})),
- WindowFunction::BuiltInWindowFunction(fun) => {
- Err(DataFusionError::NotImplemented(format!(
- "window function with {:?} not implemented",
- fun
- )))
- }
+ WindowFunction::BuiltInWindowFunction(fun) =>
Ok(Arc::new(BuiltInWindowExpr {
+ window: create_built_in_window_expr(fun, args, input_schema,
name)?,
+ })),
+ }
+}
+
+fn create_built_in_window_expr(
+ fun: &BuiltInWindowFunction,
+ _args: &[Arc<dyn PhysicalExpr>],
+ _input_schema: &Schema,
+ name: String,
+) -> Result<Arc<dyn BuiltInWindowFunctionExpr>> {
+ match fun {
+ BuiltInWindowFunction::RowNumber => Ok(Arc::new(RowNumber::new(name))),
+ _ => Err(DataFusionError::NotImplemented(format!(
+ "window function with {:?} not yet implemented",
Review comment:
```suggestion
"Window function with {:?} not yet implemented",
```
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