jackwener commented on issue #4917:
URL:
https://github.com/apache/arrow-datafusion/issues/4917#issuecomment-1385398346
> Does it only optimize the top level plan node or the whole plan tree? I
don't understand the difference between it and the `try_optimize`.
We can do batch optimize in one plannode
```rust
rules: Vec<rule>
for rule in rules {
rule.try_optimize(plan, config)
}
```
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