Tuples and UDTs as CQL map values  

Workaround for using tuples and UDTs as CQL map values.

DSE Search does not support using tuples and UDTs as CQL map values. Use this workaround to simulate a map-like data model.

Procedure

  1. Declare a collection of tuples or UDTs that have a type field that represents what would have been the map key:
    Create the tuple type. The tuple type applies to tuples and UDTs.
    CREATE TYPE Address (type text, street text, city text)

    Create table for UDT:

    CREATE TABLE Person (name text primary key, addresses set<frozen<address>>)

    Or create a table for a tuple:

    CREATE TABLE Person (name text primary key, addresses set<frozen<tuple<text, text, text>>>)
  2. Using this collection of tuples or UDTs as a map-like data model, it is possible to query for person addresses of a given type (key).
    For example, to query for persons whose home address is in London:
    {!tuple}addresses.type:Home AND
        addresses.city:London