Re: Janusgraph not able to find suitable index for a index enabled property key


Boxuan Li
 

Hi Harshit,

You should use STRING mapping if you want exact string match. TEXT mapping is for full text search. See 

Best,
Boxuan

On Mon, Jan 10, 2022 at 1:15 PM Harshit Sharma <harshit.sharma1080@...> wrote:
Hi Marc,

1. Creation of property keys and indices in the schema + commit
      graph = (Janusgraph) GraphDBConfigurator.getGraph()
      mgmt = graph.openManagement()
      
     For Vertex ->
           propertyKey = mgmt.makePropertyKey(propertyKeyName).dataType (String.class).cardinality(Cardinality.SET).make()
          if(existingIndex) 
                janusgraphIndex = mgmt.getGraphIndex(VERTEX_INDEX_NAME)
                mgmt.addIndex(janusgraphIndex, propertyKey)
          else
               indexBuilder = mgmt.buildIndex(VERTEX_INDEX_NAME,  Vertex.class)
               if(cardinality is SET)
                        indexBuilder.addKey(propertyKey, String.class.equals(propertyKey.dataType) ? Mapping.TEXT.asParameter() : Mapping.DEFAULT.asParameter())
               else
                        indexBuilder.addKey(propertyKey, String.class.equals(propertyKey.dataType) ? Mapping.TEXTSTRING.asParameter() : Mapping.DEFAULT.asParameter())
  
    For Edge ->
            propertyKey = mgmt.makePropertyKey(propertyKeyName).dataType (String.class).cardinality(Cardinality.SINGLE).make()
             propertyKey = mgmt.makePropertyKey(propertyKeyName).dataType (String.class).cardinality(Cardinality.SINGLE).make()
          if(existingIndex) 
                janusgraphIndex = mgmt.getGraphIndex(EDGE_INDEX_NAME)
                mgmt.addIndex(janusgraphIndex, propertyKey)
          else
               indexBuilder = mgmt.buildIndex(EDGE_INDEX_NAME,  Vertex.class)
               if(cardinality is SET)
                        indexBuilder.addKey(propertyKey, String.class.equals(propertyKey.dataType) ? Mapping.TEXT.asParameter() : Mapping.DEFAULT.asParameter())
               else
                        indexBuilder.addKey(propertyKey, String.class.equals(propertyKey.dataType) ? Mapping.TEXTSTRING.asParameter() : Mapping.DEFAULT.asParameter())
         
            mgmt.commit();
    


       3.   Query of a vertex based on a property value in another transaction
             Let say i created a property key "domain_vertex_key1_s" for vertex
             Query = g.V().has("domain_vertex_key1_s", "val1);
             
             Let say I created a property key "domain_edge_key1_s" for edge
            
             Query = g.V().has("domain_vertex_key1_s","val2");
          

On Mon, 10 Jan, 2022, 12:46 am , <hadoopmarc@...> wrote:
Hi Harshit,

Can you please describe the steps you have taken in more detail:
  • creation of property keys and indices in the schema + commit,
  • creation of a vertex with a property in one committed transaction,
  • query of a vertex based on a property value in another transaction.

Marc

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