Samba Siva Rao Kolusu created CASSANDRA-12654:

             Summary: Query Validation Error : CQL IN operator over last 
partitioning|clustering column (valid) is rejected if a query fetches 
collection columns
                 Key: CASSANDRA-12654
             Project: Cassandra
          Issue Type: Bug
          Components: CQL
            Reporter: Samba Siva Rao Kolusu
            Priority: Minor
             Fix For: 3.8, 3.9, 3.10, 4.0

although IN operator is allowed over the last clustering or partitioning 
columns, the CQL Query Validator is rejecting queries when they attempt to 
fetch collection columns in their result set.

It seems a similar bug (CASSANDRA-5376) was raised some time ago, and a fix 
(rather mask) was provided to give a better error message to such queries in 

Considering that Cassandra & CQL has evolved a great deal from that period, it 
now seems possible to provide an actual fix to this problem, i.e. allowing 
queries to fetch collection columns even when IN operator is used.

please read the following mail thread to understand the context :

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