creating edges by "joining" 2 classes - orientdb

Question

In Orientdb 3.0 RC1 (Tinkerpop/Gremlin community edition) I have 2 vertex classes:
- 'Company' with 1 property 'address'
- 'Address' with 1 property 'address' having a UNIQUE_HASH_INDEX on this property
Need to create edges of class 'Location' between 'Company' vertexes to the corresponding 'Address' vertex based on having the same 'address' property value.
First I tried using Gremlin the following way:
g.V().hasLabel("Company").as("a").
V().hasLabel("Address").as("b").
where("a", eq("b")).by("address").
addE("Location").next()
But the mid-traversal is not hitting the index .....I guess the OrientDB-Gremlin implementation not complete yet or my above query not good.
Then I converted the above to use a sideEffect():
g.V().hasLabel("Company").sideEffect{g.V().hasLabel("Address").has("address",it.get().property('address').value()).addE('Location').from(it.get()).next()}
but after quickly adding around 1k edges the query abruptly aborts and the OrientDB logs a lot of warnings like this:
"WARNI {db=ter1050} This database instance has 1280 open command/query result sets, please make sure you close them with OResultSet.close()"
So once again .....my query has a problem or I hit a bug.
I didn't find a way to do it in OrientDB SQL also.
I know this can be done using Tinkerpop API in Java but I was hoping for something more simple.

Answer 1

Try this:
OrientDB orientDB = new OrientDB("remote:localhost/", "<username>", "<password>", OrientDBConfig.defaultConfig());
ODatabaseDocument db = orientDB.open("<db name>","<username>", "<password>");
OResultSet result = db.command("select from Company");
OResultSet address_class = db.command("select from Address");
List<OResult> company = new ArrayList<OResult>();
List<OResult> address = new ArrayList<OResult>();
while(result.hasNext())
{
OResult record = result.next();
company.add(record);
}
while(address_class.hasNext())
{
OResult record = address_class.next();
address.add(record);
}
for(int i = 0; i < company.size(); i++)
{
String company_address = company.get(i).getProperty("address");
for(int j = 0; j < address.size(); j++)
{
String addresses = address.get(j).getProperty("address");
if(company_address.equals(addresses))
{
ORecordId company_rid = company.get(i).getProperty("#rid");
ORecordId addresses_rid = address.get(j).getProperty("#rid");
db.command("create edge Location from " + company_rid + " to " + addresses_rid);
}
}
}
db.close();
orientDB.close()
this is the result:
Hope it helps
Regards