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From "Tyler Hobbs (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-11466) Add Dynamic Type to the Native Protocol
Date Wed, 30 Mar 2016 20:19:25 GMT
Tyler Hobbs created CASSANDRA-11466:
---------------------------------------

             Summary: Add Dynamic Type to the Native Protocol
                 Key: CASSANDRA-11466
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11466
             Project: Cassandra
          Issue Type: Improvement
          Components: CQL
            Reporter: Tyler Hobbs


There are several cases where the native protocol limits our ability to support functions
due to argument or result types that are only known at execution time.  For example, we can't
support {{fromJson()}} in the selection clause or {{toJson()}} outside of the selection clause.

To support these functions and other use cases, we should add a dynamic type to the native
protocol.  The serialization format for this would be a {{<type>}} field (i.e. a numeric
typecode, as defined in the native protocol spec) followed by the serialized value.  When
deserializing values, drivers would first read the typecode to determine the type, then decode
the remainder of the bytes accordingly.  How this type information is exposed to the end user
is up to the driver authors.



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