Indhumathi27 commented on a change in pull request #3977:
URL: https://github.com/apache/carbondata/pull/3977#discussion_r503982610



##########
File path: core/src/main/java/org/apache/carbondata/core/view/MVProvider.java
##########
@@ -545,14 +545,14 @@ private void touchMDTFile() throws IOException {
         FileFactory.createDirectoryAndSetPermission(this.systemDirectory,
             new FsPermission(FsAction.ALL, FsAction.ALL, FsAction.ALL));
       }
-      if (!FileFactory.isFileExist(this.schemaIndexFilePath)) {
-        FileFactory.createNewFile(
-            this.schemaIndexFilePath,
-            new FsPermission(FsAction.ALL, FsAction.ALL, FsAction.ALL));
+      if (FileFactory.isFileExist(this.schemaIndexFilePath)) {

Review comment:
       ```suggestion
         CarbonFile schemaIndexFile = 
FileFactory.getCarbonFile(this.schemaIndexFilePath);
         if (schemaIndexFile.exists()) {
           schemaIndexFile.delete();
         }
         schemaIndexFile.createNewFile(new FsPermission(FsAction.ALL, 
FsAction.ALL, FsAction.ALL));
         this.lastModifiedTime = schemaIndexFile.getLastModifiedTime();
   ```




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