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Posted to dev@tinkerpop.apache.org by Stephen Mallette <sp...@gmail.com> on 2015/11/30 20:29:39 UTC
Immutable Vertex Labels
It occurred to me today while responding to a post regarding Titan that TP
3 APIs assume that vertex labels are immutable. Titan is happy with that
because it doesn't allow such things, but it made me wonder about other
providers.
A quick bit of research showed that Neo4j could support such a thing:
http://neo4j.com/docs/stable/query-set.html#set-set-a-label-on-a-node
I was wondering if other providers could comment on their ability to
support modifying a vertex label after the vertex is created. If we find
that it is such that many providers could support it then maybe the TP3 API
should support that.
Re: Immutable Vertex Labels
Posted by Marko Rodriguez <ok...@gmail.com>.
Hi,
I personally like the symmetry between edge and vertex labels. If you want to "change a label" for an edge, you have to delete the edge and create a new one with the label you want. Likewise for vertices. With this, label-methods fall nicely from Element. Finally, realize that there are also VertexProperty labels and would those support mutation ?… eek.
I have no real skin in the game, so….
Marko.
http://markorodriguez.com
On Nov 30, 2015, at 1:15 PM, Stephen Mallette <sp...@gmail.com> wrote:
> I'm only at the point of figuring out if there are enough graph providers
> who can implement single label mutability to warrant the discussion of
> whether or not we should have it in TinkerPop. Thanks for weighing in from
> sqlg perspective.
>
> On Mon, Nov 30, 2015 at 2:47 PM, pieter <pi...@gmail.com> wrote:
>
>> Sqlg does not support changing a vertex label.
>> In our case however it could be as trivial as a ALTER TABLE command.
>>
>> Neo4j supports many labels per node/element which is significantly
>> different to TinkerPop's label semantic.
>> Would you propose that also or just editing the one label?
>>
>> Thanks
>> Pieter
>>
>>
>>
>>
>> On 30/11/2015 21:29, Stephen Mallette wrote:
>>> It occurred to me today while responding to a post regarding Titan that
>> TP
>>> 3 APIs assume that vertex labels are immutable. Titan is happy with that
>>> because it doesn't allow such things, but it made me wonder about other
>>> providers.
>>>
>>> A quick bit of research showed that Neo4j could support such a thing:
>>>
>>> http://neo4j.com/docs/stable/query-set.html#set-set-a-label-on-a-node
>>>
>>> I was wondering if other providers could comment on their ability to
>>> support modifying a vertex label after the vertex is created. If we find
>>> that it is such that many providers could support it then maybe the TP3
>> API
>>> should support that.
>>>
>>
>>
Re: Immutable Vertex Labels
Posted by Stephen Mallette <sp...@gmail.com>.
I'm only at the point of figuring out if there are enough graph providers
who can implement single label mutability to warrant the discussion of
whether or not we should have it in TinkerPop. Thanks for weighing in from
sqlg perspective.
On Mon, Nov 30, 2015 at 2:47 PM, pieter <pi...@gmail.com> wrote:
> Sqlg does not support changing a vertex label.
> In our case however it could be as trivial as a ALTER TABLE command.
>
> Neo4j supports many labels per node/element which is significantly
> different to TinkerPop's label semantic.
> Would you propose that also or just editing the one label?
>
> Thanks
> Pieter
>
>
>
>
> On 30/11/2015 21:29, Stephen Mallette wrote:
> > It occurred to me today while responding to a post regarding Titan that
> TP
> > 3 APIs assume that vertex labels are immutable. Titan is happy with that
> > because it doesn't allow such things, but it made me wonder about other
> > providers.
> >
> > A quick bit of research showed that Neo4j could support such a thing:
> >
> > http://neo4j.com/docs/stable/query-set.html#set-set-a-label-on-a-node
> >
> > I was wondering if other providers could comment on their ability to
> > support modifying a vertex label after the vertex is created. If we find
> > that it is such that many providers could support it then maybe the TP3
> API
> > should support that.
> >
>
>
Re: Immutable Vertex Labels
Posted by pieter <pi...@gmail.com>.
Sqlg does not support changing a vertex label.
In our case however it could be as trivial as a ALTER TABLE command.
Neo4j supports many labels per node/element which is significantly
different to TinkerPop's label semantic.
Would you propose that also or just editing the one label?
Thanks
Pieter
On 30/11/2015 21:29, Stephen Mallette wrote:
> It occurred to me today while responding to a post regarding Titan that TP
> 3 APIs assume that vertex labels are immutable. Titan is happy with that
> because it doesn't allow such things, but it made me wonder about other
> providers.
>
> A quick bit of research showed that Neo4j could support such a thing:
>
> http://neo4j.com/docs/stable/query-set.html#set-set-a-label-on-a-node
>
> I was wondering if other providers could comment on their ability to
> support modifying a vertex label after the vertex is created. If we find
> that it is such that many providers could support it then maybe the TP3 API
> should support that.
>