[jira] [Created] (TINKERPOP3-612) Support only two types of Cardinality -- SINGLE and MULTI

["Marko A. Rodriguez (JIRA)" <ji...@apache.org>]

Marko A. Rodriguez created TINKERPOP3-612:
---------------------------------------------

             Summary: Support only two types of Cardinality -- SINGLE and MULTI
                 Key: TINKERPOP3-612
                 URL: https://issues.apache.org/jira/browse/TINKERPOP3-612
             Project: TinkerPop 3
          Issue Type: Improvement
          Components: structure
    Affects Versions: 3.0.0.GA
            Reporter: Marko A. Rodriguez
            Assignee: Marko A. Rodriguez


We currently support the following {{Cardinality}} states:

* {{single}}: one property per property key.
* {{list}}: any number of properties per property key.
* {{set}}: multi properties for the property key if and only if the values are unique.

Right now equality for {{set}} is determined by {{Object.equals}}. This may be sufficient for most users, but maybe not. Next, this is an expensive operation for vendors that don't index on value. Finally, it seems to be of limited use in practice due to its complex behavior regarding meta-property overwriting. I think its best to NOT include {{set}} as an option -- simplifies the API and is more aligned with the core semantics of:

* {{single}}
* {{multi}}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)