Fuzzy entity query in Wikidata with Sparql times out

Question

I\'m trying to do a fuzzy (ie.. partial or case-insensitive) entity label lookup in Wikidata with Sparql (via the online endpoint). Unfortunately these return a \"Query

Answer 1

Be more specific. Triplestores work with things, not with strings. For example, the following query works fine:

SELECT ?item WHERE {
    ?item wdt:P735 wd:Q2958359 .
    ?item rdfs:label ?label .
    FILTER (CONTAINS(LCASE(STR(?label)), "lindbergh"))
}

If it is not possible to be sufficiently specific, you need full-text search capabilities.

• In fact, Blazegraph supports full-text search using magic bds:search predicate, but this facility is not enabled on Wikidata.
• Additionally, Blazegraph supports external full-text search using magic fts:search predicate. The current implementation supports Apache Solr only. Perhaps it is relatively easy to support ElasticSearch, which is used in Wikidata, but anyway, this facility is not enabled.

There is a task to provide full-text search in a form of yet another Wikidata magic service, but this functionality is still not available on the public endpoint.

As a workaround, one can use SQL queries on Quarry. This is my query on Quarry:

USE wikidatawiki_p; 
DESCRIBE wb_terms;

SELECT CONCAT("Q", term_entity_id) AS wikidata_id, term_language, term_text, term_search_key
FROM wb_terms
WHERE term_type = 'label' AND
                         term_search_key IN (LOWER('Lindbergh'), LOWER('Charles Lindbergh'));

The query time limit on Quarry is 30 minutes.