gremlin

问题 When I am updating my schema, I created a new property(say A) but I forgot to build index. Without knowing that, I have tried to add the value for that property resulted in :> g.V().hasLabel('AA').has('active',true).property('A','ok').count() ** Could not find a suitable index to answer graph query and graph scans are disabled: [(~label = user)]:VERTEX** :> g.V().hasLabel('AA').has('active',true).has('A','ok').valueMap() But when I do valueMap by traversing it with other indexed property then

问题 When I am updating my schema, I created a new property(say A) but I forgot to build index. Without knowing that, I have tried to add the value for that property resulted in :> g.V().hasLabel('AA').has('active',true).property('A','ok').count() ** Could not find a suitable index to answer graph query and graph scans are disabled: [(~label = user)]:VERTEX** :> g.V().hasLabel('AA').has('active',true).has('A','ok').valueMap() But when I do valueMap by traversing it with other indexed property then

问题 I am calling JanusGraph remote, which returns ReferenceVertex by default. In order to retrieve properties as well, I use valueMap(), which works well for simple queries. However, in my use case I need to build a join, which works well based on ReferenceVertex as follows: // select t1.table2_ID, t2.table2_ID from table1 as t1 inner join table2 as t2 on t1.table2_ID = t2.table2_ID GraphTraversal<?, ?> t1 = __.start().as("table1").out("relatesTo").hasLabel("table2").as("table2"); GraphTraversal<

问题 I'm using gremlinpython 3.4.1 on Python 3.7.2, and when get vertex/edge responses it is providing <T.id: > for id and <T.label: 3> for the label. How would I get it to provide the string value for id and label in the response instead? My aim is take the output and generate JSON The output: python3 stackoverflow.py [{'name': ['USA'], 'parentname': ['USA'], 'shortname': ['US'], <T.id: 1>: 'country-us', 'parentid': ['country-us'], <T.label: 3>: 'Country'}] The code: from gremlin_python import

问题 I am using Titan 1.0.0 supported by cassandra 2.1.7 as backend storage. While trying to execute the same query on gremlin console and java program, I am getting 2 the output in two different formats. I am using the gremlin console provided by titan-1.0.0-hadoop1 and for java I am using TinkerPop Gremlin 3.0.1-incubating. Gremlin Console: gremlin> g.V().has('msid',within(-2128958273, 2147477890)).as('in').local(outE('hie_child').has('hostid_e',within(153,83)).order().by('hrank',incr).limit(5))

问题 It seems that the unique id for vertices is community_id in DSE Graph. I have found that this works (id is long) : v = g.V().has("VertexLabel","community_id",id).next() none of those work: v = g.V("community_id",id).next() v = g.V("community_id","VertexLabel:"+id).next() v = g.V(id).next() v = g.V().hasId(id).next() v = g.V().hasId("VertexLabel:"+id).next() v = g.V("VertexLabel:"+id).next() Edit After some investigation I found that for a vertex v, v.id() returns a LinkedHashMap: Vertex v =

问题 I'm using the CosmosDB Graph database to store the names of a few people, their marriages and the children whom they have out of the marriages. In the following diagram, you will see that the person Husband has a Child A from his first marriage and Child B from his second marriage. Father of Husband Mother of Husband GRAND FATHER & GRAND MOTHER +---------------+--------------+ Marriage | +------------+---------------+--------------+-----------+ FATHER & MOTHER Ex Wife A Marriage Husband

问题 I'm using the CosmosDB Graph database to store the names of a few people, their marriages and the children whom they have out of the marriages. In the following diagram, you will see that the person Husband has a Child A from his first marriage and Child B from his second marriage. Father of Husband Mother of Husband GRAND FATHER & GRAND MOTHER +---------------+--------------+ Marriage | +------------+---------------+--------------+-----------+ FATHER & MOTHER Ex Wife A Marriage Husband

问题 I want to connect to my gremlin server where i have given the gremlin-server.yaml and remote.yaml with the same host. My gremlin is on the linux server. While giving the :remote command i get, gremlin> :remote connect tinkerpop.server conf/remote-objects.yaml 05:20:38 WARN org.apache.tinkerpop.gremlin.driver.handler.WebSocketClientHandler - Exception caught during WebSocket processing - closing connection io.netty.handler.codec.http.websocketx.WebSocketHandshakeException: Invalid handshake

问题 I'm writing gremlin query with 'match()' traversal. It seems some pattern matching behaves differently than other pattern languages. How input traverser values are bound by pattern variables. g.V('A', 'B').match(__.as('x'), __.as('y')).project('x', 'y') ==>[x:v[A],y:v[A]] ==>[x:v[B],y:v[B]] I think pattern variable x and y have no constraints and result will be ==>[x:v[A],y:v[A]] ==>[x:v[A],y:v[B]] ==>[x:v[B],y:v[A]] ==>[x:v[B],y:v[B]] It seems a constraint x = y is added implicitly. When