HaoYang670 commented on issue #4917:
URL:
https://github.com/apache/arrow-datafusion/issues/4917#issuecomment-1385080638
Hi @jackwener, I have one question about the `optimize_node` function:
```rust
fn optimize_node(
&self,
rule: &Arc<dyn OptimizerRule + Send + Sync>,
plan: &LogicalPlan,
config: &dyn OptimizerConfig,
) -> Result<Option<LogicalPlan>> {
// TODO: future feature: We can do Batch optimize
rule.try_optimize(plan, config)
}
```
Does it only optimize the top level plan node or the whole plan tree?
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