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com.bigdata.rdf.sparql.ast.eval.query-hints-01.rq Maven / Gradle / Ivy

PREFIX rdf:  
PREFIX rdfs: 
PREFIX foaf: 

SELECT ?x ?o
WHERE {

  # disable join order optimizer
  hint:Group hint:optimizer "None" .

  # query hint binds for the group.
  hint:Group hint:maxParallel 10 .

  # query hint binds for the group and any subgroups.
  hint:GroupAndSubGroups hint:com.bigdata.bop.PipelineOp.pipelineQueueCapacity 20 .

  # query hint binds for the (sub)query but does not effect other (sub)queries.
  hint:SubQuery hint:com.bigdata.relation.accesspath.BlockingBuffer.chunkOfChunksCapacity 20 .

  ?x rdfs:label ?o .

  ?x rdf:type foaf:Person .

  # query hint binds for the immediately proceeding basic graph pattern.
  hint:Prior hint:com.bigdata.relation.accesspath.IBuffer.chunkCapacity 1000 .

  # query hint binds for the immediately proceeding basic graph pattern.
  #hint:Prior hint:com.bigdata.bop.IPredicate.fullyBufferedReadThreshold 5000 .

}