jackwener commented on code in PR #4233:
URL: https://github.com/apache/arrow-datafusion/pull/4233#discussion_r1028048962
##########
datafusion/optimizer/src/optimizer.rs:
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@@ -225,6 +225,14 @@ impl Optimizer {
let result = rule.try_optimize(&new_plan, optimizer_config);
match result {
Ok(Some(plan)) => {
+ if plan.schema() != new_plan.schema() {
+ return Err(DataFusionError::Internal(format!(
Review Comment:
Indeed, we may need to relax restrictions on some conditions, such as
`nullable`.
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