yjshen commented on a change in pull request #965:
URL: https://github.com/apache/arrow-datafusion/pull/965#discussion_r706770477
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File path: datafusion/src/execution/context.rs
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@@ -710,17 +710,17 @@ impl Default for ExecutionConfig {
optimizers: vec![
Arc::new(ConstantFolding::new()),
Arc::new(EliminateLimit::new()),
- Arc::new(AggregateStatistics::new()),
Arc::new(ProjectionPushDown::new()),
Arc::new(FilterPushDown::new()),
Arc::new(SimplifyExpressions::new()),
- Arc::new(HashBuildProbeOrder::new()),
Arc::new(LimitPushDown::new()),
],
physical_optimizers: vec![
Arc::new(CoalesceBatches::new()),
Arc::new(Repartition::new()),
Arc::new(AddCoalescePartitionsExec::new()),
+ Arc::new(AggregateStatistics::new()),
Review comment:
We may want to run all the optimizers multiple rounds until no further
plan tree changing or we reached an upper limit round of optimization, in order
to keep stats up to date as well as optimization consistency.
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