Table name in published model

[usc-isi-i2]

Table name in published model

[szeke]

Hi,

The offline mode supports using a single model to generate RDF from
multiple table. Here is an example invocation.

mvn exec:java -Dexec.mainClass="edu.isi.karma.rdf.OfflineRdfGenerator"
-Dexec.args="--sourcetype DB --modelfilepath .ttl --outputfile
--dbtype MySQL --hostname xxx.edu --username pedro --password
szekely --portnumber 3306 --dbname mydb --tablename mytable" &> xxx.log

You must execute this command in your Web-Karma installation directory. I
think you just need to substitute the --tablename value.

BTW, next week we will release an upgrade to the RDF generation that works
almost 100 times faster and can generate about 1M triples per minute.

Thanks for using Karma

Pedro

On Fri, Oct 25, 2013 at 3:57 AM, FrenkT [email protected] wrote:

Hi, I'm currently creating an R2RML model from karma web UI, publishing it
and using it to periodically generate RDF in batch mode. My problem is that
in the R2RML contains some reference about the name of the MySQL table that
I used to generate it, but I would like to use it with tables that have
different names but still the same content.
For example, I published the model using a table named "sensors1", I would
like to use the R2RML to publish RDF of a table named "sensors2" that has
the same columns as "sensors1". Is this possible to to this? Maybe using
some regular expressions in the R2RML? Thanks

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/39
.

[FrenkT]

I'm using that invocation, and it usually works. The problem is that in the R2RML file there is some reference to the name of the table that I used to generate it, for example in my model I can see entries like this:
km-dev:sourceName "DB1"
:
rr:tableName "DB1"

I think that this makes me get an error if I call the offline RDF generation with --tablename DB2 , even if DB2 has the same columns as DB1. This is the error:
edu.isi.karma.webserver.KarmaException: Resource not found in model for the source: DB2

[szeke]

We will try to replicate the problem. The idea is that the command line parameter should override the rr:tableName, and looks like this is not working properly.

Can you post the full stack trace of the error so we can be sure we are replicating your error.

[FrenkT]

This is the terminal message and error. The table park_replica exists and i replaced all the table reference in the R2RML with another name.

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building ISI Karma Maven Webapp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> exec-maven-plugin:1.2.1:java (default-cli) @ webkarma >>>
[INFO]
[INFO] <<< exec-maven-plugin:1.2.1:java (default-cli) @ webkarma <<<
[INFO]
[INFO] --- exec-maven-plugin:1.2.1:java (default-cli) @ webkarma ---
Loading the R2RML model file...done
Generating RDF...
ERROR edu.isi.karma.rdf.OfflineRdfGenerator.main() - Error occured while generating RDF!
edu.isi.karma.webserver.KarmaException: Resource not found in model for the source: park_replica
at edu.isi.karma.kr2rml.WorksheetR2RMLJenaModelParser.(WorksheetR2RMLJenaModelParser.java:107)
at edu.isi.karma.rdf.DatabaseTableRDFGenerator.generateRDFFromWorksheet(DatabaseTableRDFGenerator.java:148)
at edu.isi.karma.rdf.DatabaseTableRDFGenerator.generateRDF(DatabaseTableRDFGenerator.java:135)
at edu.isi.karma.rdf.OfflineRdfGenerator.main(OfflineRdfGenerator.java:204)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
at java.lang.Thread.run(Thread.java:724)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 11.454s
[INFO] Finished at: Sun Oct 27 12:52:48 CET 2013
[INFO] Final Memory: 20M/210M
[INFO] ------------------------------------------------------------------------

[szeke]

Thx for the stack trace. We will take a look.

[dkapoor]

Issue fixed and pushed to development branch

[szeke]

Pushed to master.