Ed Summers
2016-09-25 10:32:06 UTC
I've been experimenting a bit with queries that contain regular expressions and have noticed that they seem to be triggering 502 Bad Gateway errors. Or perhaps it's just a coincidence and there were other things going on around 10AM GMT?
Here's an example query where I'm looking for cities that start with "Silver":
---
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT ?s ?label
WHERE {
?s wdt:P31 wd:Q515 .
?s rdfs:label ?label
FILTER(regex(?label, "^Silver"))
}
LIMIT 15
---
Am I doing something wrong in the query? Occasionally it seems to work, but most of the time it waits for a while and then I get the 502 error. Any guidance you may have would be appreciated.
//Ed
Here's an example query where I'm looking for cities that start with "Silver":
---
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT ?s ?label
WHERE {
?s wdt:P31 wd:Q515 .
?s rdfs:label ?label
FILTER(regex(?label, "^Silver"))
}
LIMIT 15
---
Am I doing something wrong in the query? Occasionally it seems to work, but most of the time it waits for a while and then I get the 502 error. Any guidance you may have would be appreciated.
//Ed
