peter-toth commented on code in PR #40473:
URL: https://github.com/apache/spark/pull/40473#discussion_r1142068268
##########
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala:
##########
@@ -449,6 +449,20 @@ class SubexpressionEliminationSuite extends SparkFunSuite
with ExpressionEvalHel
assert(e2.getCommonSubexpressions.size == 1)
assert(e2.getCommonSubexpressions.head == add)
}
+
+ test("SPARK-42851: Handle supportExpressions consistently across add and
get") {
+ val tx = {
+ val arr = Literal(Array(1, 2))
+ val ArrayType(et, cn) = arr.dataType
+ val lv = NamedLambdaVariable("x", et, cn)
+ val lambda = LambdaFunction(lv, Seq(lv))
+ ArrayTransform(arr, lambda)
+ }
+ val equivalence = new EquivalentExpressions
+ val isNewExpr = equivalence.addExpr(tx)
Review Comment:
`.addExpr()`'s boolean result is counter-intuitive to other collection's
`.add()` methods so IMO `isNewExpr` should be `!equivalence.addExpr(tx)` here.
This is the reasons why I think getting rid of `.addExpr()` is probably the
most straightforward fix here: https://github.com/apache/spark/pull/40488
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