LuciferYang commented on code in PR #37163:
URL: https://github.com/apache/spark/pull/37163#discussion_r919652743


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sql/core/src/test/scala/org/apache/spark/sql/InjectRuntimeFilterSuite.scala:
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@@ -209,11 +209,13 @@ class InjectRuntimeFilterSuite extends QueryTest with 
SQLTestUtils with SharedSp
     // `MergeScalarSubqueries` can duplicate subqueries in the optimized plan 
and would make testing
     // complicated.
     conf.setConfString(SQLConf.OPTIMIZER_EXCLUDED_RULES.key, 
MergeScalarSubqueries.ruleName)
+    conf.setConf(SQLConf.CBO_ENABLED, false)

Review Comment:
   Seems this line is to keep consistent with the previous behavior, but should 
we add some TODO for this change? For example, spilt this Suites into 
`withCBOEnabled` and `withCBODisabled`?
   
   I found many suites in this class will fail when `CBOEnabled`.



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