taiyang-li commented on code in PR #7235:
URL: https://github.com/apache/incubator-gluten/pull/7235#discussion_r1759641353


##########
gluten-ut/spark33/src/test/scala/org/apache/spark/sql/catalyst/expressions/GlutenMathExpressionsSuite.scala:
##########
@@ -18,11 +18,40 @@ package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.gluten.utils.BackendTestUtils
 
+import org.apache.spark.sql.GlutenQueryTestUtil.isNaNOrInf
 import org.apache.spark.sql.GlutenTestsTrait
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.types._
 
+import org.apache.commons.math3.util.Precision
+
+import java.nio.charset.StandardCharsets
+
 class GlutenMathExpressionsSuite extends MathExpressionsSuite with 
GlutenTestsTrait {
+  override protected def checkResult(

Review Comment:
   Yes, I'll apply it only to CH backend. 



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