[Virtuoso-users] Virtuoso 6.1.3 NT import problem

2011-04-15 Thread Bernhard Haslhofer
Hi, we recently switched to Virtuoso 6.1.3 and since then our data import process terminates with the following error message: *** Error 23000: [Virtuoso Driver][Virtuoso Server]SR133: Can not set NULL to not nullable column 'DB.DBA.RDF_QUAD.O' at line 0 of Top-Level: DB.DBA.TTLP_MT_LOCAL_FILE(

[Virtuoso-users] SPARQL DESCRIBE Performance Issue

2009-12-21 Thread Bernhard Haslhofer
Hi, I am currently performing some data analysis on our local DBpedia dataset running on a Virtuoso 6 server. For that I need to execute a large amount of SPARQL DESCRIBE queries against the local Virtuoso SPARQL endpoint - in a single run approx. 400.000 queries. I know that this will take som

[Virtuoso-users] SPARQL Result Problem - Virtuoso 06.00.3123

2009-12-10 Thread Bernhard Haslhofer
Hi, for research purposes I have imported DBpedia dumps into a local Virtuoso 06.00.3123 instance using the following command: ttlp_mt (file_to_string_output ('$f'), '', '$g', 255); I am using the 255 flag cause I need all triples in the store, also the erroneous ones. Now, when executing th

[Virtuoso-users] rdf import - turtle parser flags

2009-11-10 Thread Bernhard Haslhofer
Hi, I am currently playing around with dbpedia imports into Virtuoso, which works pretty well with the script provided in the documentation. The only issue I could not solve yet, is how to use the turtle parser so that it also imports triples with non-URI conforming nodes. In the older DBpedia