dongjoon-hyun commented on a change in pull request #30245:
URL: https://github.com/apache/spark/pull/30245#discussion_r523281950
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala
##########
@@ -146,20 +146,111 @@ class SubexpressionEliminationSuite extends
SparkFunSuite {
equivalence.addExprTree(add)
// the `two` inside `fallback` should not be added
assert(equivalence.getAllEquivalentExprs.count(_.size > 1) == 0)
- assert(equivalence.getAllEquivalentExprs.count(_.size == 1) == 3) // add,
two, explode
+ assert(equivalence.getAllEquivalentExprs.count(_.size == 1) == 3) // add,
two, explode
}
- test("Children of conditional expressions") {
- val condition = And(Literal(true), Literal(false))
+ test("Children of conditional expressions: If") {
val add = Add(Literal(1), Literal(2))
- val ifExpr = If(condition, add, add)
+ val condition = GreaterThan(add, Literal(3))
- val equivalence = new EquivalentExpressions
- equivalence.addExprTree(ifExpr)
- // the `add` inside `If` should not be added
- assert(equivalence.getAllEquivalentExprs.count(_.size > 1) == 0)
- // only ifExpr and its predicate expression
- assert(equivalence.getAllEquivalentExprs.count(_.size == 1) == 2)
+ val ifExpr1 = If(condition, add, add)
+ val equivalence1 = new EquivalentExpressions
+ equivalence1.addExprTree(ifExpr1)
+
+ // `add` is in both two branches of `If` and predicate.
+ assert(equivalence1.getAllEquivalentExprs.count(_.size == 2) == 1)
+ assert(equivalence1.getAllEquivalentExprs.filter(_.size == 2).head ==
Seq(add, add))
+ // one-time expressions: only ifExpr and its predicate expression
+ assert(equivalence1.getAllEquivalentExprs.count(_.size == 1) == 2)
+ assert(equivalence1.getAllEquivalentExprs.filter(_.size == 1).head ==
Seq(ifExpr1))
Review comment:
Thank you, @leoluan2009 and @viirya . The follow-up is merged to reduce
the flakiness.
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