UUID and TIMEUUID

    • hex_digit is a hexadecimal digit ([0-9a-fA-F]).
    • Columns of type or TIMEUUID can be part of the PRIMARY KEY.
    • Implicitly, values of type UUID and TIMEUUID datatypes are neither convertible nor comparable to other datatypes.
    • TIMEUUIDs are version 1 UUIDs: they include the date and time of their generation and a spatially unique node identifier.
    1. cqlsh:example> CREATE TABLE devices(id UUID PRIMARY KEY, ordered_id TIMEUUID);
    1. cqlsh:example> INSERT INTO devices (id, ordered_id) 
    2.                VALUES (123e4567-e89b-42d3-a456-426655440000, 123e4567-e89b-12d3-a456-426655440000);
    1. cqlsh:example> SELECT * FROM devices;