Hi again,
I have another question about indexing,
Will these two kinds of indexing work the same (I mean is the way they
index the schema the same?)?:
JAVA API:
IndexDefinition indexDefinition;
try ( Transaction tx = graphDb.beginTx() )
{
Schema schema = graphDb.schema();
indexDefinition = schema.indexFor( DynamicLabel.label( "User" ) )
.on( "username" )
.create();
tx.success();
}
Cypher Query:
CREATE INDEX ON :User(username)
And in general is java api faster than cypher queries? for some queries
like:
MATCH (u:User), (uu:User) WHERE u.userid=? AND uu.userid=? CREATE (u)
-(:Friends{status:{1}})-> (uu)
Best,
Reihane
On Thursday, February 13, 2014 11:49:57 AM UTC-8, Reihane Boghrati wrote:
>
> I may need to rephrase my sentence, for example we can have a user with
> userid = 10 in our database, and when we query the database (which is
> indexed by lucene) for user with userid=10, the database may not find a
> result for that query. However it actually exists. This is not acceptable
> for social networks (which is the focus of BG benchmark).
> I heard about this issue in Lucene indexing service from Prof.
> Ghandeharizadeh at USC DBLAB. if you wish you can contact him directly.
>
> On Wednesday, February 12, 2014 10:54:46 AM UTC-8, Reihane Boghrati wrote:
>>
>> Hi,
>>
>> I'm writing a client for Neo4j to evaluate that with BG benchmark.
>> As far as I know, Neo4j is using Lucene for indexing nodes and the Cypher
>> query for creating index is something like : CREATE INDEX ON :Users(userid)
>> I believe that Lucene retrieval is not 100% accurate, meaning that if it
>> doesn't return data, one cannot be sure data is not existed. Is that right?
>> I browsed different websites but I couldn't find an alternative index
>> service. I was wondering if anyone is aware of any other accurate index
>> provider that can be used in Neo4j?
>>
>> Best,
>> Reihane
>>
>>
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