Enforcing uniqueness constraint on vertex-centric indices
52 views
Skip to first unread message
Jean-Baptiste Musso
Nov 19, 2014, 8:46:11 AM11/19/14
to aureliu...@googlegroups.com
Greetings,
I’ve been looking through the documentation for ways to enforce a uniqueness constraint on a vertex-centric index.
Use case : edges store various sensor data between two vertices, each edge stores values at a specific timestamp that must be unique. On some not-so-rare occasions, duplicate sensor data (same values, same timestamp) can be sent more than once for insertion to the graph and we need to make sure that a duplicate edge is not created (by only checking the timestamp).
We could do it easily at the application level but we’re wondering if there’s a way to enforce such uniqueness constraint at the database level.
I was thinking that we could chain .unique() to the vertex-centric index definition just as we do when defining regular, graph-wide indexes. To the best of my knowledge, I don’t think such feature exists. If not, is this something doable and that may be added in a future version of Titan?
Thanks. Cheers,
Jean-Baptiste
I’ve been looking through the documentation for ways to enforce a uniqueness constraint on a vertex-centric index.
Use case : edges store various sensor data between two vertices, each edge stores values at a specific timestamp that must be unique. On some not-so-rare occasions, duplicate sensor data (same values, same timestamp) can be sent more than once for insertion to the graph and we need to make sure that a duplicate edge is not created (by only checking the timestamp).
We could do it easily at the application level but we’re wondering if there’s a way to enforce such uniqueness constraint at the database level.
I was thinking that we could chain .unique() to the vertex-centric index definition just as we do when defining regular, graph-wide indexes. To the best of my knowledge, I don’t think such feature exists. If not, is this something doable and that may be added in a future version of Titan?
Thanks. Cheers,
Jean-Baptiste
Matthias Broecheler
Nov 19, 2014, 1:57:24 PM11/19/14
to aureliu...@googlegroups.com
No, vertex-centric uniqueness is not supported right now.
--
You received this message because you are subscribed to the Google Groups "Aurelius" group.
To unsubscribe from this group and stop receiving emails from it, send an email to aureliusgraph...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/aureliusgraphs/628d8d0e-8365-499a-bebd-143eaf1ddeb1%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Reply all
Reply to author
Forward
0 new messages