Doing following query on a virtual graph.
./stardog query CRAB "SELECT * {GRAPH <virtual://CRAB> {?x a <http://www.w3.org/ns/locn#Address>}} LIMIT 5"
+-------------------------------------------+
| x |
+-------------------------------------------+
| http://id.vlaanderen.be/id/adres/84401 |
| http://id.vlaanderen.be/id/adres/84402 |
| http://id.vlaanderen.be/id/adres/84403 |
| http://id.vlaanderen.be/id/adres/84404 |
| http://id.vlaanderen.be/id/adres/84405 |
+-------------------------------------------+
Query returned 5 results in 00:02:30.072
Ay suggestion or tips to speed this type of query up?
Other queries are fine.
./stardog query CRAB "SELECT * {GRAPH <virtual://CRAB> {<http://id.vlaanderen.be/id/adres/84405> ?p ?v.}} LIMIT 5"
+-------------------------------------+--------------+
| p | v |
+-------------------------------------+--------------+
| http://purl.org/dc/terms/identifier | 84405 |
| rdf:type | locn:Address |
+-------------------------------------+--------------+
Query returned 2 results in 00:00:00.091
Hey Paul,What you are doing here is kind of querying all virtual mappings and reporting URI and Type.Given the fact you are doing it on a relational database database means you are selecting all "rows" for "every mapping" (table).This is kind of cool for an RDF store but not for a RDMBS.In my experience you need to really carefully design your mappings (step by step) and keep track of SQL that is generated to your database.N
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