more efficient QLever query

[egonw]

SPARQLQueries/4.Federated/InChIKey_to_Wikidata_for_ChEBI_and_HMDB.rq

Line 31 in aab0d17

OPTIONAL { ?wd rdfs:label ?wdLabel . FILTER(LANG(?wdLabel) = "en") } #Retrieve the label from Wikidata for the metabolite

Since OPTIONAL sections will be run by QLever separately, this will ask for labels for all elements, making it relatively slow. You can reduce this by adding further restrictions.

So, please add ?wd wdt:P235 [] . so that you have this:

OPTIONAL { ?wd wdt:P235 [] . ?wd rdfs:label ?wdLabel . FILTER(LANG(?wdLabel) = "en") }

Please apply to all labels in QLever queries.