Jena adaptor and sqlldr
Hi,
I am trying jena adaptor API. I succeeded in different kind of loading. I would like to know if it is the same tool that this api uses. Mainly, I wonder if the bulk loader uses a stage table and sqlldr like we directly use it in oracle .
Thanks for your precision,
Dacko
Actually, we don't want you to worry about the underlying machinery :)
When you use the Jena Adaptor's addInBatch API, then we use batch loading capabilities through JDBC.
When you use the Jena Adaptor's addInBulk API, then we create, through JDBC, staging table, populate it and also a separate table for long literals, invoke bulk loader, and finally add those triples with long literals. As you can see, there is no SQLLoader involved.*
Hope it helps,
Zhe Wu
Similar Messages
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Jena adaptor doesn't use ID column in model _TPL table
The Oracle semantic technology developers guide, recommends that the triple table for an RDF model have at least 2 columns, an ID column with values from a sequence, and a triple column. The Jena adaptor creates a table with only a triple column. This isn't consistent with recommended practice from the manual, and could be a problem for other software that expects this column. I'm not exactly sure what purpose the ID column serves except to distinguish mutiple copies of the same triple.
Is it possible to configure the adaptor to do this?
Currently I'm modifying my other software to conform to the Oracle RDF configuration that Jena prefers, but that might be a problem somewhere down the line.I don't think that ID column is recommended. The dev guide shows an application example with an ID column. It does not mean (or say) it is a recommended practice.
For Jena Adaptor, one TRIPLE column is sufficient. An additional ID column does not provide additional value for the Jena functions provided.
Cheers,
Zhe Wu -
We are pleased to announce the availability of the Oracle Jena Adaptor, that will enable the use of the Jena framework with Oracle RDF. Jena is an Open Source framework developed by Hewlett-Packard and is available under a BSD-style license; see http://jena.sf.net for details.
The Jena adaptor software implements the well-known Jena Graph and Model APIs. It extends the capabilities of Oracle semantic data management (Oracle 10gR2 RDF and Oracle 11gR1 RDF/OWL) with a set of easy-to-use Java APIs. Enhancements have been done to the server side to accommodate those APIs.
You can download the Oracle Jena Adaptor by visitng the Oracle Semantic Technologies page at http://www.oracle.com/technology/tech/semantic_technologies/index.html and clicking on 'Software' in the column on the right.
Melli Annamalai
Oracle Database Semantic TechnologiesIt appears like the readme.txt is not included in the zip file kept at the down location. Can you verify this please?
Thanks,
Rajesh. -
Two problems in BSBM benchmark of Oracle 10g with Jena Adaptor 2.0
Hi, all.
I'm proceeding BSBM benchmark for Oracle 10g with Jena Adaptor 2.0.
I'm using the codes that were introduced in Jena Adaptor 2.0 guide document, and I've applied Jena patches to Oracle 10g (10.2.0).
But, two problems are occured in benchmark process.
The first problem is
that 250k dataset(consisted of 250030 triples) loading time elapses over several hours, (See below code snippet.)
and the other is
that exceptions are occured in some sparql query execution.
I used below queries which have no error in query syntax.
I confirmed that through other benchmark tests.
In case of oracle benchmark test, quey1 is ok. but, query2 makes exception.
Please, look about the Exception message below.
What should I do for getting much better benchmark result?
I appreciate any help or any hint.
Best regards ~
### Query 1 ###
PREFIX bsbm-inst: <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/>
PREFIX bsbm: <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/vocabulary/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?product ?label
WHERE {
?product rdfs:label ?label .
?product a <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/ProductType18> .
?product bsbm:productFeature <http://www4.wiwiss.fu-
berlin.de/bizer/bsbm/v01/instances/ProductFeature833> .
?product bsbm:productFeature <http://www4.wiwiss.fu-
berlin.de/bizer/bsbm/v01/instances/ProductFeature61> .
?product bsbm:productPropertyNumeric1 ?value1 .
FILTER (?value1 > 136)
ORDER BY ?label
LIMIT 10
### Query 2 ###
PREFIX bsbm-inst: <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/>
PREFIX bsbm: <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/vocabulary/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
SELECT ?label ?comment ?producer ?productFeature ?propertyTextual1 ?propertyTextual2 ?
propertyTextual3
?propertyNumeric1 ?propertyNumeric2 ?propertyTextual4 ?propertyTextual5 ?propertyNumeric4
WHERE {
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
rdfs:label ?label .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
rdfs:comment ?comment .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:producer ?p .
?p rdfs:label ?producer .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
dc:publisher ?p .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:productFeature ?f .
?f rdfs:label ?productFeature .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:productPropertyTextual1 ?propertyTextual1 .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:productPropertyTextual2 ?propertyTextual2 .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:productPropertyTextual3 ?propertyTextual3 .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:productPropertyNumeric1 ?propertyNumeric1 .
<http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536>
bsbm:productPropertyNumeric2 ?propertyNumeric2 .
OPTIONAL { <http://www4.wiwiss.fu-
berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536> bsbm:productPropertyTextual4 ?
propertyTextual4 }
OPTIONAL { <http://www4.wiwiss.fu-
berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536> bsbm:productPropertyTextual5 ?
propertyTextual5 }
OPTIONAL { <http://www4.wiwiss.fu-
berlin.de/bizer/bsbm/v01/instances/dataFromProducer11/Product536> bsbm:productPropertyNumeric4 ?
propertyNumeric4 }
### Exception Message (in query 2 execution) ###
Exception in thread "main" java.sql.SQLException: ORA-00936: missing expression
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe
(T4CPreparedStatement.java:799)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1038)
at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe
(T4CPreparedStatement.java:839)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1133)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal
(OraclePreparedStatement.java:3285)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery
(OraclePreparedStatement.java:3329)
at oracle.spatial.rdf.client.jena.Oracle.executeQuery(Oracle.java:255)
at oracle.spatial.rdf.client.jena.OracleSemQueryPlan.executeBindings
(OracleSemQueryPlan.java:302)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterBlockTriplesQH$StagePattern.<init>
(QueryIterBlockTriplesQH.java:89)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterBlockTriplesQH.nextStage
(QueryIterBlockTriplesQH.java:55)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage
(QueryIterRepeatApply.java:92)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding
(QueryIterRepeatApply.java:54)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext
(QueryIteratorBase.java:69)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage
(QueryIterRepeatApply.java:85)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding
(QueryIterRepeatApply.java:54)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext
(QueryIteratorBase.java:69)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage
(QueryIterRepeatApply.java:85)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding
(QueryIterRepeatApply.java:54)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext
(QueryIteratorBase.java:69)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage
(QueryIterRepeatApply.java:85)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding
(QueryIterRepeatApply.java:54)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext
(QueryIteratorBase.java:69)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIterConvert.hasNextBinding
(QueryIterConvert.java:47)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext
(QueryIteratorBase.java:69)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding
(QueryIteratorWrapper.java:29)
at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext
(QueryIteratorBase.java:69)
at com.hp.hpl.jena.sparql.engine.ResultSetStream.hasNext(ResultSetStream.java:62)
at benchmark.repository.oracle.OracleQuerying.getSelectQueryResult
(OracleQuerying.java:148)
at benchmark.repository.oracle.OracleQuerying.doSparqlQuery(OracleQuerying.java:101)
at benchmark.repository.oracle.OracleQuerying.queryingData(OracleQuerying.java:90)
at benchmark.repository.oracle.OracleQuerying.querying(OracleQuerying.java:49)
at benchmark.repository.oracle.OracleQuerying.<init>(OracleQuerying.java:44)
at benchmark.Benchmark.runTest(Benchmark.java:113)
at benchmark.Benchmark.main(Benchmark.java:56)
### Loading Code Snippet ###
String jdbcURL = "jdbc:oracle:thin:@" + Constants.HOST + ":1521:orcl";
OracleDataSource ds = new OracleDataSource();
ds.setURL(jdbcURL);
ds.setUser(Constants.ORACLE_USER);
ds.setPassword(Constants.ORACLE_PASSWORD);
OracleConnection conn = (OracleConnection) ds.getConnection();
oracle = new Oracle(conn);
modelOracleSem = ModelOracleSem.createOracleSemModel(oracle, modelName);
graphOracleSem = modelOracleSem.getGraph();
graphOracleSem.createTables();
graphOracleSem.clearRepository();
for (int i = 0; i < fileList.length; i++) {
file = fileList;
if (file.isDirectory())
continue;
inputFilePath = file.getAbsolutePath();
InputStream in = null;
try {
in = FileManager.get().open(inputFilePath);
if (in == null) {
throw new IllegalArgumentException("File: " + inputFilePath + " not found");
modelOracleSem.read(in, "", "N-TRIPLE");
modelOracleSem.commit();
} finally {
if (in != null)
in.close();Hi,
The data loading was slow because incremental loading API was used. Please take a look at OracleBulkUpdateHandler. There is an addInBatch API that you can use.
Now regarding queries, Jena Adaptor v2.0 was primarily designed for Oracle Database 11g Release 1.
Recently, a new version of Jena Adaptor has been released and it's optimized for Oracle Database 11g
Release 2.
Is it possible to run your BSBM benchmark tests against Oracle Database 11g Release 2 using the latest
Jena Adaptor (http://forums.oracle.com/forums/ann.jspa?annID=1179) ?
Thanks,
Zhe Wu -
Ena Assemblers in the new Oracle Jena Adaptor?
Hello,
will there be Jena Assemblers in the new Oracle Jena Adaptor?
I try to access the Oracle Spatial DBMS through Joseki, a Jena-HTTP Interface, and need Oracle Jena Assemblers for this.
http://tech.groups.yahoo.com/group/jena-dev/message/35839
By the way, can you tell me in round terms when native SPARQL/SPARUL-Support in Oracle Spatial is expexted?
Thanks and Regards,
Srdja MatovicHmm. We haven't opened source this Oracle Jena Adaptor.
Please let me know what exactly you are looking for. I may be able to help you quickly.
Email me at alan dot wu at oracle dot com
if you want to take this off line.
Thanks. -
One Tip on using Oracle Jena Adaptor
To run Oracle Jena Adaptor smoothly, we recommend using the java executable under
$ORACLE_HOME/jdk/bin
and including in your classpath the JDBC library, ojdbc5.jar, under
$ORACLE_HOME/jdbc/libIt appears like the readme.txt is not included in the zip file kept at the down location. Can you verify this please?
Thanks,
Rajesh. -
Hi, i wanna ask how to integrate Jena Adaptor with SWRLB . is it possible ?
ThanksActually, we don't want you to worry about the underlying machinery :)
When you use the Jena Adaptor's addInBatch API, then we use batch loading capabilities through JDBC.
When you use the Jena Adaptor's addInBulk API, then we create, through JDBC, staging table, populate it and also a separate table for long literals, invoke bulk loader, and finally add those triples with long literals. As you can see, there is no SQLLoader involved.*
Hope it helps,
Zhe Wu -
No signal to VGA monitor using Mac mini display to VGA adaptor and first time boot Mac mini
Just unpacked Mac mini and powered up using Mac mini to VGA display adaptor and VGA monitor. There is no signal to the monitor ( power is on).
How to see the display?[ 13.093] (==) No Layout section. Using the first Screen section.
[ 13.093] (==) No screen section available. Using defaults.
[ 13.093] (**) |-->Screen "Default Screen Section" (0)
[ 13.093] (**) | |-->Monitor "<default monitor>"
[ 13.093] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
First step would be to create the necessary entries (easier to make a complete xorg.conf versus xorg.conf.d/##-whatever.conf).
All Desktop Environments / Window Managers rely on X. Man pages are helpful, possibly some headaches ahead as I fought a dual-monitor display this way.
I currently run a xrandr script to switch displays on my hp pavilion: https://wiki.archlinux.org/index.php/Xrandr#Scripts
Check it out. -
I installed windows 7 on my macbook pro. all is working but lan adaptor and sound od laptop is not working. please help me or send the link where i can download the these drivers.I have lost my resource cd .
If you are running Lion or Mountain Lion, the drivers are downloaded from within Bootcamp Assistant. If you are running Snow Leopard the drivers are on your Snow Leopard install disk.
Read the Bootcamp Install Guide for your version of OSx. http://www.apple.com/support/bootcamp/
Bootcamp questions should be asked in the Bootcamp forum where the Bootcamp gurus hang out https://discussions.apple.com/community/windows_software/boot_camp -
Can the iPod touch 5g connect to an audio amplifier via lightning to 30 pin adaptor and through a 30 pin to RCA cable adaptor? It works on the latest iPod nano but it doesn't on iPhone 6. I have spoken to the apple reseller sales personnel but he has no clue.
If it works on the 7G Nano and does not on the iPhone 6 I would not expect it to work on the 5G iPod..
Just what adopter are you talking about? Can you provide a link? -
Can anybody help?
I am considering buying a new MAC laptop to run LOGIC for composition and band live/recording, but which one is best as I do not want to spend too much money?
Does it have a line in and how do you monitor sound?
Will I need adaptors and an interface?
Also, I am guessing as Logic only runs on MAC surely then they would not the best spec to recommend to run it?
I see all the upgrades as additional memory or a faster process?
Is a retina screen necessary, and why flash based storage against a 1TB hard drive, and a i5 instead of an i7
The main reason for this purchase is to play live and use backing tracks and record found sounds and make creative songs.
I hope you can provide some valuable feedback, as I am a longtime MAC user and see upgrades and changes happen regularly but the most important thing is the songs not the equipment.
I have £500 already and willing to add another 500 to 700 pounds, then software extra.Can anybody help?
I am considering buying a new MAC laptop to run LOGIC for composition and band live/recording, but which one is best as I do not want to spend too much money?
Does it have a line in and how do you monitor sound?
Will I need adaptors and an interface?
Also, I am guessing as Logic only runs on MAC surely then they would not the best spec to recommend to run it?
I see all the upgrades as additional memory or a faster process?
Is a retina screen necessary, and why flash based storage against a 1TB hard drive, and a i5 instead of an i7
The main reason for this purchase is to play live and use backing tracks and record found sounds and make creative songs.
I hope you can provide some valuable feedback, as I am a longtime MAC user and see upgrades and changes happen regularly but the most important thing is the songs not the equipment.
I have £500 already and willing to add another 500 to 700 pounds, then software extra. -
Thunderbolt port for ethernet adaptor and display
Hi-
As there is only one Thunderbolt port on a MacBook Air, how am I supposed to connect my gigabit adaptor AND a display at the same time?
Thanks.Unless the display is (Apple's) Thunderbolt Display, which replicates TB as well as providing Ethernet, FireWire, USB, and audio, you might need to live with little less than "Gigabit" and get a USB->Ethernet adapter.
-
Which transport protocol is most efficient in JMS adaptor and why..???
Hi all,
Which transport protocol is most efficient in JMS adaptor and why..???
Also can anyone tell me how to check queues in the integration server and in the reciever side....???
If any one explain it rather than providing any link...i will be delighted...
Thanks....
Biplab<i>Which transport protocol is most efficient in JMS adaptor and why..???</i>
U have to select the JMS provider for the JMS adapter under Transport Protocol.
The selection of JMS provider could be according to ur cost estimation.
http://help.sap.com/saphelp_nw04/helpdata/en/c1/739c4186c2a409e10000000a155106/frameset.htm
SONIQ MQ and IBM MQ series r widely used
<i>Also can anyone tell me how to check queues in the integration server and in the reciever side....???</i>
smq1 - outbound queues
smq2 - inbound queues
Regards,
Prateek -
SPARQL query through Jena adaptor not work when string literals used
Hi,
When I executed the following SPARQL query through Oracle Jena adaptor:
SELECT ?personHasFirstName WHERE
{?personHasFirstName foaf:firstName ?name . }
I got the expected results.
However it won't return anything when I narrowed the query to match a particular name like below:
SELECT ?personHasFirstName WHERE
{?personHasFirstName foaf:firstName \"Julie\" . }
I also tried the Filter approach:
SELECT ?personHasFirstName WHERE {?personHasFirstName foaf:firstName ?name . FILTER (?name =\"Julie\") }
It still doesn't return any results.
I saw from the release notes about the bug dealing with "\". My guess is that the above behavior is caused by that bug. What is the suggested way to walk-around this? Thanks,
WeihuaCould you please try this? It works as expected on my machine.
GraphOracleSem graph = new GraphOracleSem( oracle, modelName);
ModelOracleSem model = new ModelOracleSem(graph);
Node sub = Node.createURI("http://test.com/employee123");
Node pre = Node.createURI("http://xmlns.com/foaf/0.1/firstName");
Node obj = Node.createLiteral("Julie");
graph.add(Triple.create(sub, pre, obj));
String queryString =
" PREFIX foaf: <http://xmlns.com/foaf/0.1/> " +
"SELECT ?person WHERE { ?person foaf:firstName \"Julie\" . } ";
QueryExecution qexec = QueryExecutionFactory.create(
QueryFactory.create(queryString), model);
try {
ResultSet results = qexec.execSelect();
while (results.hasNext()) {
QuerySolution soln = results.nextSolution();
psOut.println("runQuery: soln " + soln);
finally {
if (qexec != null)
qexec.close();
output snippet:
runQuery: soln ( ?person = <http://test.com/employee123> ) -
Sparql endpoint with Jena adaptor
Hello,
I'm using the Oracle-Jena adaptor. It works well. But we want now to get an sparql server (http sparql protocol)? Anyone here has any experience with that?Hi,
It says the following in the readme instructions on how to install Jena adaptor.
Please consult the Oracle® Database Semantic Technologies Developer's Guide 11g Release 2 (11.2) documentation for Jena Adaptor installation instructions.
But can't seem to find the instructions in the developers guide, do you know if the installation instructions exist? if so can you point to the location?
Thanks,
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