SPARQL can now compare xsd:date type as well, fixes #532

2 files changed, 53 insertions, 1 deletions

diff --git a/rdflib/plugins/sparql/datatypes.py b/rdflib/plugins/sparql/datatypes.py
index 82c21a91..be2351e2 100644
--- a/rdflib/plugins/sparql/datatypes.py
+++ b/rdflib/plugins/sparql/datatypes.py
@@ -9,7 +9,7 @@ XSD_DTs = set(
      XSD.boolean, XSD.dateTime, XSD.nonPositiveInteger, XSD.negativeInteger,
      XSD.long, XSD.int, XSD.short, XSD.byte, XSD.nonNegativeInteger,
      XSD.unsignedLong, XSD.unsignedInt, XSD.unsignedShort, XSD.unsignedByte,
-     XSD.positiveInteger))
+     XSD.positiveInteger, XSD.date))
 
 _sub_types = {
     XSD.integer: [
diff --git a/test/test_issue532.py b/test/test_issue532.py
new file mode 100644
index 00000000..3a745bc6
--- /dev/null
+++ b/test/test_issue532.py
@@ -0,0 +1,52 @@
+# test for https://github.com/RDFLib/rdflib/issues/532
+
+from rdflib import Graph
+
+data = """
+@base <http://purl.org/linkedpolitics/MembersOfParliament_background> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
+@prefix lpv: <vocabulary/> .
+@prefix NationalParty: <NationalParty/> .
+
+<EUmember_1026>
+    a lpv:MemberOfParliament ;
+    lpv:MEP_ID "1026" ;
+    lpv:countryOfRepresentation <EUCountry_FR> ;
+    lpv:dateOfBirth "1946-07-13"^^xsd:date ;
+    lpv:politicalFunction [
+        a lpv:PoliticalFunction ;
+        lpv:beginning "1989-10-13"^^xsd:date ;
+        lpv:end "1992-01-14"^^xsd:date ;
+        lpv:institution NationalParty:sans_etiquette
+    ] , [
+        a lpv:PoliticalFunction ;
+        lpv:beginning "2005-02-24"^^xsd:date ;
+        lpv:end "2007-01-30"^^xsd:date ;
+        lpv:institution NationalParty:Union_pour_la_democratie_francaise
+    ] ;
+    foaf:familyName "Bourlanges" ;
+    foaf:givenName "Jean-Louis" .
+"""
+
+g = Graph()
+g.parse(data=data, format='n3')
+
+getnewMeps ="""
+PREFIX lpv: <http://purl.org/linkedpolitics/vocabulary/>
+prefix foaf: <http://xmlns.com/foaf/0.1/>
+prefix xsd: <http://www.w3.org/2001/XMLSchema#>
+
+SELECT DISTINCT ?name ?lastname WHERE {
+  ?member a lpv:MemberOfParliament .
+  ?member foaf:givenName ?name .
+  ?member foaf:familyName ?lastname .
+  ?member lpv:politicalFunction ?function .
+  ?function lpv:beginning ?date .
+
+  FILTER (?date >= "2004-06-20"^^xsd:date)
+}
+"""
+
+result = list(g.query(getnewMeps))
+assert len(result) == 1