peter-toth commented on code in PR #13046:
URL: https://github.com/apache/datafusion/pull/13046#discussion_r1813093649
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datafusion/core/src/physical_optimizer/optimizer.rs:
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@@ -103,6 +103,10 @@ impl PhysicalOptimizer {
// replacing operators with fetching variants, or adding limits
// past operators that support limit pushdown.
Arc::new(LimitPushdown::new()),
+ // The EliminateCommonPhysicalSubExprs rule extracts common
physical
+ // subexpression trees into a `ProjectionExec` node under the
actual node to
+ // calculate the common values only once.
+ Arc::new(EliminateCommonPhysicalSubexprs::new()),
Review Comment:
Yes, this rule is useful only for Comet and similar usecases. Let me remove
it from the default optimizer:
https://github.com/apache/datafusion/commit/d2529cef3ae097be7b0979a6965adc5570af3cd4
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