kunal642 commented on a change in pull request #3970:
URL: https://github.com/apache/carbondata/pull/3970#discussion_r504400394



##########
File path: sdk/sdk/src/main/java/org/apache/carbondata/sdk/file/CarbonIUD.java
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@@ -173,10 +184,16 @@ public void update(String path, Expression 
filterExpression,
     RecordWriter<NullWritable, ObjectArrayWritable> deleteDeltaWriter =
         CarbonTableOutputFormat.getDeleteDeltaRecordWriter(path);
     ObjectArrayWritable writable = new ObjectArrayWritable();
-
+    long day = 24L * 3600 * 1000;
     while (reader.hasNext()) {
       Object[] row = (Object[]) reader.readNextRow();
       writable.set(Arrays.copyOfRange(row, row.length - 1, row.length));
+      for (Integer dateIndex : dateIndexes) {
+        row[dateIndex] = new Date((day * ((int) row[dateIndex])));

Review comment:
       Date and Timestamp conversion should be in SDK reader. Please fix the 
reader 




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