Nachiket Patil created CASSANDRA-13369:
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             Summary: If there are multiple values for a key, CQL grammar 
choses last value. This should not be silent or should not be allowed.
                 Key: CASSANDRA-13369
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13369
             Project: Cassandra
          Issue Type: Bug
          Components: CQL
            Reporter: Nachiket Patil
            Assignee: Nachiket Patil
            Priority: Minor
             Fix For: 4.0


If through CQL, multiple values are specified for a key, grammar parses the map 
and last value for the key wins. This behavior is bad.
e.g. 
`$ CREATE KEYSPACE "Excalibur"
  WITH REPLICATION = {'class' : 'NetworkTopologyStrategy', 'dc1' : 2, 'dc1' : 
5};`

Parsing this statement, 'dc1' gets RF = 5. This can be catastrophic, may even 
result in loss of data. This behavior should not be silent or not be allowed at 
all.  




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