shahrs87 commented on a change in pull request #978:
URL: https://github.com/apache/phoenix/pull/978#discussion_r532782887



##########
File path: 
phoenix-core/src/main/java/org/apache/phoenix/coprocessor/UngroupedAggregateRegionScanner.java
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@@ -479,6 +486,8 @@ void deleteCForQ(Tuple result, List<Cell> results, 
UngroupedAggregateRegionObser
             delete.addColumns(deleteCF,  deleteCQ, ts);
             // force tephra to ignore this deletes
             
delete.setAttribute(PhoenixTransactionContext.TX_ROLLBACK_ATTRIBUTE_KEY, new 
byte[0]);
+            // TODO: should we set the source of operation attribute here.
+            // TODO: This will be true if we drop column or drop table

Review comment:
       @gjacoby126  Could you please advise whether should we add the attribute 
here ? This codepath is used when we drop the column which will in turn 
generate Delete Marker. 




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