Benjamin Lerer created CASSANDRA-18813:
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             Summary: Simplify the Bind Marker and Term logic
                 Key: CASSANDRA-18813
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18813
             Project: Cassandra
          Issue Type: Improvement
          Components: CQL/Interpreter
            Reporter: Benjamin Lerer
            Assignee: Benjamin Lerer


The current logic around {{Term}} and {{Terms}} classes is confusing specially 
with {{MultiItemTerminal}} and {{MultiColumnRaw}} that are used to handle 
different use cases that could be handled simply with the {{Term}} interface.

On top of that IN marker add to the confusion because the are represented as 
single Term where in practice they are a set of terms. Representing them as a 
{{Terms}} could simplify  the way we handle IN restrictions.

The goal of this ticket is:
*  to refactor the {{Term}} and {{Terms}} interfaces to simplify the logic
* Represents IN bind marker as {{Terms}} instead of having 2 different 
representations (a list of terms and a single {{MultiItemTerminal}}.
* Simplify the {{AbstractMarker}} hierachy     



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