chenboat commented on a change in pull request #4608: Unit tests and bug fixes 
for DeleteTable rest API for controller.
URL: https://github.com/apache/incubator-pinot/pull/4608#discussion_r324223469
 
 

 ##########
 File path: 
pinot-controller/src/main/java/org/apache/pinot/controller/api/resources/PinotTableRestletResource.java
 ##########
 @@ -254,14 +254,20 @@ public SuccessResponse deleteTable(
 
     List<String> tablesDeleted = new LinkedList<>();
     try {
-      if (tableType != TableType.REALTIME && 
!TableNameBuilder.REALTIME.tableHasTypeSuffix(tableName)) {
+      if (tableType != TableType.REALTIME && 
!TableNameBuilder.REALTIME.tableHasTypeSuffix(tableName)
+          && _pinotHelixResourceManager.hasOfflineTable(tableName)) {
         _pinotHelixResourceManager.deleteOfflineTable(tableName);
         
tablesDeleted.add(TableNameBuilder.OFFLINE.tableNameWithType(tableName));
       }
-      if (tableType != TableType.OFFLINE && 
!TableNameBuilder.OFFLINE.tableHasTypeSuffix(tableName)) {
+      if (tableType != TableType.OFFLINE && 
!TableNameBuilder.OFFLINE.tableHasTypeSuffix(tableName)
+          && _pinotHelixResourceManager.hasRealtimeTable(tableName)) {
         _pinotHelixResourceManager.deleteRealtimeTable(tableName);
         
tablesDeleted.add(TableNameBuilder.REALTIME.tableNameWithType(tableName));
       }
+      if (tablesDeleted.size() == 0) {
+        throw new ControllerApplicationException(LOGGER, "Table '" + tableName 
+ "' does not exist",
+            Response.Status.BAD_REQUEST);
 
 Review comment:
   Done. Good point.

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