CONSTRUCT WHERE is not supported

[white-gecko]

As I understand the SPARQL 1.1 standard the following two queries should be equal (cf. https://www.w3.org/TR/sparql11-query/#constructWhere):

https://qlever.cs.uni-freiburg.de/dnb/k1Yz2K:

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX dcterms: <http://purl.org/dc/terms/>
CONSTRUCT {
  ?page foaf:isPrimaryTopicOf ?topic; dc:title ?title; dcterms:medium <http://rdaregistry.info/termList/RDACarrierType/1018> .
  ?snapshot dcterms:isPartOf ?page .
} WHERE {
  ?page foaf:isPrimaryTopicOf ?topic; dc:title ?title; dcterms:medium <http://rdaregistry.info/termList/RDACarrierType/1018> .
  ?snapshot dcterms:isPartOf ?page .
} LIMIT 100

https://qlever.cs.uni-freiburg.de/dnb/4yew0o:

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX dcterms: <http://purl.org/dc/terms/>
CONSTRUCT WHERE {
  ?page foaf:isPrimaryTopicOf ?topic; dc:title ?title; dcterms:medium <http://rdaregistry.info/termList/RDACarrierType/1018> .
  ?snapshot dcterms:isPartOf ?page .
} LIMIT 100

The first gives results the second doesn't.

[joka921]

Thanks for reporting this, as far as I understand the SPARQL grammar, you are absolutely right.
I just have to look if this is a two line fix, or if it requires to rewrite large parts of the parser.