viirya commented on a change in pull request #32586:
URL: https://github.com/apache/spark/pull/32586#discussion_r635497784
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
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@@ -42,7 +42,7 @@ class EquivalentExpressions {
}
// For each expression, the set of equivalent expressions.
- private val equivalenceMap = mutable.HashMap.empty[Expr,
mutable.ArrayBuffer[Expression]]
+ private val equivalenceMap = mutable.LinkedHashMap.empty[Expr,
mutable.ArrayBuffer[Expression]]
Review comment:
yea, can be reverted back to HashMap, if we are going to sort it at all.
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