def evalGraph(ctx, part):
if ctx.dataset is None:
raise Exception("Non-conjunctive-graph doesn't know about " +
"graphs. Try a query without GRAPH.")
ctx = ctx.clone()
graph = ctx[part.term]
if graph is None:
res = []
for graph in ctx.dataset.contexts():
# in SPARQL the default graph is NOT a named graph
if graph == ctx.dataset.default_context:
continue
ctx.pushGraph(graph)
ctx.push()
graphSolution = [{part.term: graph.identifier}]
res += _join(evalPart(ctx, part.p), graphSolution)
ctx.pop()
ctx.popGraph()
return res
else:
ctx.pushGraph(ctx.dataset.get_context(graph))
return evalPart(ctx, part.p)
def evalGraph(ctx, part):
if ctx.dataset is None:
raise Exception(
"Non-conjunctive-graph doesn't know about " +
"graphs. Try a query without GRAPH.")
ctx = ctx.clone()
graph = ctx[part.term]
if graph is None:
res = []
for graph in ctx.dataset.contexts():
# in SPARQL the default graph is NOT a named graph
if graph == ctx.dataset.default_context:
continue
ctx.pushGraph(graph)
ctx.push()
graphSolution = [{part.term: graph.identifier}]
res += _join(evalPart(ctx, part.p), graphSolution)
ctx.pop()
ctx.popGraph()
return res
else:
ctx.pushGraph(ctx.dataset.get_context(graph))
return evalPart(ctx, part.p)
def evalJoin(ctx, join):
# TODO: Deal with dict returned from evalPart from GROUP BY
# only ever for join.p1
a = set(evalPart(ctx, join.p1))
b = set(evalPart(ctx, join.p2))
return _join(a, b)
def evalJoin(ctx, join):
# TODO: Deal with dict returned from evalPart from GROUP BY
# only ever for join.p1
a = set(evalPart(ctx, join.p1))
b = set(evalPart(ctx, join.p2))
return _join(a, b)
def evalLeftJoin(ctx, join):
a = set(evalPart(ctx, join.p1))
b = set(evalPart(ctx, join.p2))
res = set()
res.update(_filter(_join(a, b), join.expr))
res.update(_diff(a, b, join.expr))
return res
def evalLeftJoin(ctx, join):
a = set(evalPart(ctx, join.p1))
b = set(evalPart(ctx, join.p2))
res = set()
res.update(_filter(_join(a, b), join.expr))
res.update(_diff(a, b, join.expr))
return res
def evalDeleteWhere(ctx, u):
"""
http://www.w3.org/TR/sparql11-update/#deleteWhere
"""
res = evalBGP(ctx, u.triples)
for g in u.quads:
cg = ctx.dataset.get_context(g)
ctx.pushGraph(cg)
res = _join(res, evalBGP(ctx, u.quads[g]))
ctx.popGraph()
for c in res:
g = ctx.graph
g -= _fillTemplate(u.triples, c)
for g in u.quads:
cg = ctx.dataset.get_context(c.get(g))
cg -= _fillTemplate(u.quads[g], c)
def evalDeleteWhere(ctx, u):
"""
http://www.w3.org/TR/sparql11-update/#deleteWhere
"""
res = evalBGP(ctx, u.triples)
for g in u.quads:
cg = ctx.dataset.get_context(g)
ctx.pushGraph(cg)
res = _join(res, evalBGP(ctx, u.quads[g]))
ctx.popGraph()
for c in res:
g = ctx.graph
g -= _fillTemplate(u.triples, c)
for g in u.quads:
cg = ctx.dataset.get_context(g)
cg -= _fillTemplate(u.quads[g], c)
