com.bigdata.rdf.sparql.ast.eval

Class AST2BOpJoins

java.lang.Object

com.bigdata.rdf.sparql.ast.eval.AST2BOpBase

com.bigdata.rdf.sparql.ast.eval.AST2BOpFilters

com.bigdata.rdf.sparql.ast.eval.AST2BOpJoins

Direct Known Subclasses:

AST2BOpRTO

public class AST2BOpJoins
extends AST2BOpFilters

Class handles join patterns.

Version:

$Id$

Author:

Bryan Thompson

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.rdf.sparql.ast.eval.AST2BOpBase

AST2BOpBase.Annotations

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AST2BOpJoins()

Method Summary

Methods

Modifier and Type	Method and Description
static PipelineOp	join(PipelineOp left, Predicate pred, Set<IVariable<?>> doneSet, Collection<IConstraint> constraints, Long cutoffLimit, Properties queryHints, AST2BOpContext ctx) Add a join for a statement pattern.

Methods inherited from class com.bigdata.rdf.sparql.ast.eval.AST2BOpFilters

addChunkedMaterializationStep, addMaterializationSteps1, addMaterializationSteps2, addMaterializationSteps3, addNonConditionalMaterializationSteps, getJoinConstraints, getJoinConstraints, getJoinConstraints2

Methods inherited from class com.bigdata.rdf.sparql.ast.eval.AST2BOpBase

applyQueryHints, applyQueryHints, leftOrEmpty

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AST2BOpJoins

protected AST2BOpJoins()

Method Detail

join

public static PipelineOp join(PipelineOp left,
              Predicate pred,
              Set<IVariable<?>> doneSet,
              Collection<IConstraint> constraints,
              Long cutoffLimit,
              Properties queryHints,
              AST2BOpContext ctx)

Add a join for a statement pattern. This handles triples-mode, named-graph and default graph join patterns whether on a single machine or on a cluster.

Parameters:

left -

pred - The predicate describing the statement pattern.

doneSet - The set of variables already known to be materialized.

constraints - Constraints on that join (optional).

cutoffLimit - When non-null, this is the limit for a cutoff join (RTO).

queryHints - Query hints associated with that StatementPatternNode.

ctx - The evaluation context.