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https://issues.apache.org/jira/browse/CASSANDRA-3753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592306#comment-13592306
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Adriano Paggi commented on CASSANDRA-3753:
------------------------------------------

The type names returned are partial for collection types.  Returns just MapType 
without saying anything about the key-value types.  A more intuitive response 
could be something like 

org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type)

Just like in CqlResult -> schema -> value_types (returned by execute_cql3_query)

Maybe this ticket should be re-opened?

                
> Update CqlPreparedResult to provide type information
> ----------------------------------------------------
>
>                 Key: CASSANDRA-3753
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3753
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: API
>    Affects Versions: 1.1.0
>            Reporter: Jonathan Ellis
>            Assignee: Sylvain Lebresne
>            Priority: Critical
>              Labels: cql
>             Fix For: 1.1.0
>
>         Attachments: 0001-3753-cql3.patch, 0002-Thrift-gen-file-changes.patch
>
>
> As discussed on CASSANDRA-3634, adding type information to a prepared 
> statement would allow more client-side error checking.

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