Collection types

Cassandra blob data type represents a constant hexadecimal number.

A collection column is declared using the collection type, followed by another type, such as int or text, in angle brackets. For example, you can create a table having a list of textual elements, a list of integers, or a list of some other element types.


Collection types cannot currently be nested. For example, you cannot define a list within a list:

list<list<int>>     \\not allowed

Currently, you cannot create an index on a column of type map, set, or list.