[GitHub] [carbondata] akashrn5 commented on a change in pull request #3438: [CARBONDATA-3531]Support load and query for MV timeseries and support multiple granularity.

[GitBox]

akashrn5 commented on a change in pull request #3438: [CARBONDATA-3531]Support load and query for MV timeseries and support multiple granularity.
URL: https://github.com/apache/carbondata/pull/3438#discussion_r346339697
 
 

 ##########
 File path: datamap/mv/core/src/main/scala/org/apache/carbondata/mv/rewrite/Utils.scala
 ##########
 @@ -416,6 +416,30 @@ object Utils extends PredicateHelper {
     }
   }
 
+  private def canBeDerived(subsumer: ModularPlan, expE: Expression): Boolean = {
+    var canBeDerived = false
+    subsumer.asInstanceOf[Select].outputList.forall {
+      case Alias(s: ScalaUDF, _) =>
+        expE.children.foreach { expr =>
+          if (s.semanticEquals(expr)) {
+            canBeDerived = true
 
 Review comment:
   there will be one UDF expression only and one reference column inside that, so its ok

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