Details
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Type:
Bug
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Status: Accepted
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Resolution: Unresolved
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Affects Version/s: BIGDATA_RELEASE_1_5_0
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Fix Version/s: None
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Component/s: Project Management, Property Path, Query Engine
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Labels:
Description
The ALP Service makes it possible to specify limits (minimum, maximum path length) and extract bindings from a property path.
- The ALP Service is implemented by the ASTALPServiceOptimizer. Document this code.
- Create a wiki page for the ALP service support.
- See http://wiki.bigdata.com/wiki/index.php?title=PropertyPaths
A sample query is:
#e.g. "Go three hops out in either direction from vertex <id:v0> where the edge is of type <test:foo> and the edge has <some:prop>=someVal."
service bd:alp { " +
<id:v0> ?edge ?to . " +
hint:Prior hint:alp.pathExpr true .
?edge rdf:type <test:foo> .
?edge <some:prop> "someVal" .
hint:Group hint:alp.lowerBound 1 .
hint:Group hint:alp.upperBound 3 .
hint:Group hint:alp.bidirectional true .
}
See BLZG-1120.