Smalyshev added a comment.
Another broken one:
SELECT ?item ?itemLabel WHERE {
{
SELECT (MIN(?item) AS ?item) WHERE {?item wdt:P373 "A Topographical and
Historical Description of London and Middlesex (1820) by Bayley, Brewer and
Nightingale"
FILTER NOT EXISTS {?item wdt:P31 wd:Q4167836}
}
}
SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}
`itemLabel` is empty in the new code. Looking at explain, this is rewritten
as:
WITH {
QueryType: SELECT
SELECT ( com.bigdata.rdf.sparql.ast.FunctionNode(VarNode(item))[
FunctionNode.scalarVals=null,
FunctionNode.functionURI=http://www.w3.org/2006/sparql-functions#min,
valueExpr=com.bigdata.bop.rdf.aggregate.MIN(item)] AS VarNode(item) )
JoinGroupNode {
StatementPatternNode(VarNode(item),
ConstantNode(Vocab(6)[http://www.wikidata.org/prop/direct/P]:XSDUnsignedShort(373)),
ConstantNode(TermId(1466429127L)[A Topographical and Historical Description of
London and Middlesex (1820) by Bayley, Brewer and Nightingale]))
[scope=DEFAULT_CONTEXTS]
AST2BOpBase.estimatedCardinality=1
AST2BOpBase.originalIndex=POS
QueryType: ASK
SELECT VarNode(item) VarNode(-exists-1)[anonymous]
JoinGroupNode {
StatementPatternNode(VarNode(item),
ConstantNode(Vocab(6)[http://www.wikidata.org/prop/direct/P]:XSDUnsignedByte(31)),
ConstantNode(Vocab(2)[http://www.wikidata.org/entity/Q]:XSDUnsignedInt(4167836)))
[scope=DEFAULT_CONTEXTS]
AST2BOpBase.estimatedCardinality=4309882
AST2BOpBase.originalIndex=POS
} AST2BOpBase.estimatedCardinality=4309882
@askVar=-exists-1
FILTER( NotExistsNode(VarNode(-exists-1))[
FunctionNode.scalarVals=null,
FunctionNode.functionURI=http://www.bigdata.com/sparql-1.1-undefined-functionsnot-exists,
graphPattern=
JoinGroupNode {
StatementPatternNode(VarNode(item),
ConstantNode(Vocab(6)[http://www.wikidata.org/prop/direct/P]:XSDUnsignedByte(31)),
ConstantNode(Vocab(2)[http://www.wikidata.org/entity/Q]:XSDUnsignedInt(4167836)))
[scope=DEFAULT_CONTEXTS]
AST2BOpBase.estimatedCardinality=4309882
AST2BOpBase.originalIndex=POS
} AST2BOpBase.estimatedCardinality=4309882,
valueExpr=com.bigdata.rdf.internal.constraints.NotBOp(com.bigdata.rdf.internal.constraints.EBVBOp(-exists-1))]
)
}
} AS -subSelect-1 JOIN ON () DEPENDS ON ()
QueryType: SELECT
includeInferred=true
timeout=600000
SELECT ( VarNode(item) AS VarNode(item) ) ( VarNode(itemLabel) AS
VarNode(itemLabel) )
JoinGroupNode {
SERVICE <ConstantNode(TermId(0U)[http://wikiba.se/ontology#label])> {
JoinGroupNode {
StatementPatternNode(ConstantNode(TermId(0U)[http://www.bigdata.com/rdf#serviceParam]),
ConstantNode(TermId(0U)[http://wikiba.se/ontology#language]),
ConstantNode(TermId(17380L)[en])) [scope=DEFAULT_CONTEXTS]
StatementPatternNode(VarNode(item),
ConstantNode(Vocab(74)[http://www.w3.org/2000/01/rdf-schema#label]),
VarNode(itemLabel)) [scope=DEFAULT_CONTEXTS]
}
}
INCLUDE -subSelect-1 JOIN ON ()
}
Which is wrong - the service clause should go after the subselect, not
before. ` hint:Query hint:optimizer "None".` doesn't change anything - should
it? Should we have some way to disable the rewriting behavior in case it fails?
TASK DETAIL
https://phabricator.wikimedia.org/T175840
EMAIL PREFERENCES
https://phabricator.wikimedia.org/settings/panel/emailpreferences/
To: Igorkim78, Smalyshev
Cc: Smalyshev, Lucas_Werkmeister_WMDE, Aklapper, darthmon_wmde, ET4Eva,
Nandana, Lahi, Gq86, Darkminds3113, GoranSMilovanovic, QZanden, EBjune, merbst,
LawExplorer, Avner, Gehel, _jensen, rosalieper, Cirdan, Jonas, FloNight,
Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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