akashrn5 commented on a change in pull request #4180:
URL: https://github.com/apache/carbondata/pull/4180#discussion_r695389629



##########
File path: 
core/src/main/java/org/apache/carbondata/core/scan/executor/util/RestructureUtil.java
##########
@@ -119,14 +119,18 @@
         for (CarbonDimension tableDimension : tableComplexDimension) {
           if (isColumnMatches(isTransactionalTable, 
queryDimension.getDimension(),
               tableDimension)) {
-            ProjectionDimension currentBlockDimension = null;
+            ProjectionDimension currentBlockDimension;
             // If projection dimension is child of struct field and contains 
Parent Ordinal
             if (null != 
queryDimension.getDimension().getComplexParentDimension()) {
               currentBlockDimension = new 
ProjectionDimension(queryDimension.getDimension());
             } else {
               currentBlockDimension = new ProjectionDimension(tableDimension);
+              // for complex dimension update datatype, set scale and 
precision by traversing.
+              // Spark requires the resultant row with latest datatype,
+              // update the dimension here to collect the resultant rows with 
updated datatype.
+              
fillNewDatatypesForComplexChildren(currentBlockDimension.getDimension(),
+                  queryDimension.getDimension());
             }
-            // TODO: for complex dimension set scale and precision by 
traversing
             // the child dimensions

Review comment:
       remove this here and add along with new comment




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