viirya commented on a change in pull request #29950:
URL: https://github.com/apache/spark/pull/29950#discussion_r502657789
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/CollapseProjectSuite.scala
##########
@@ -170,4 +171,34 @@ class CollapseProjectSuite extends PlanTest {
val expected = Sample(0.0, 0.6, false, 11L, relation.select('a as
'c)).analyze
comparePlans(optimized, expected)
}
+
+ test("SPARK-32945: avoid collapsing projects if reaching max allowed common
exprs") {
Review comment:
Added end-to-end test.
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