org.wikidata.query.rdf.blazegraph.label

Class LabelServiceExtractOptimizer

java.lang.Object

com.bigdata.rdf.sparql.ast.optimizers.AbstractJoinGroupOptimizer

org.wikidata.query.rdf.blazegraph.label.LabelServiceExtractOptimizer

All Implemented Interfaces:

com.bigdata.rdf.sparql.ast.optimizers.IASTOptimizer

public class LabelServiceExtractOptimizer
extends com.bigdata.rdf.sparql.ast.optimizers.AbstractJoinGroupOptimizer

This class extracts label statements from label service's SERVICE clause. This is to work around bug: https://jira.blazegraph.com/browse/BLZG-2097 EmptyLabelService will insert the statements back.

Field Summary

Fields

Modifier and Type	Field and Description
static String	EXTRACTOR_ANNOTATION Annotation to store extracted nodes.

Constructor Summary

Constructors

Constructor and Description
LabelServiceExtractOptimizer()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	optimizeJoinGroup(com.bigdata.rdf.sparql.ast.eval.AST2BOpContext ctx, com.bigdata.rdf.sparql.ast.StaticAnalysis sa, com.bigdata.bop.IBindingSet[] bSets, com.bigdata.rdf.sparql.ast.JoinGroupNode op)

Methods inherited from class com.bigdata.rdf.sparql.ast.optimizers.AbstractJoinGroupOptimizer

optimize

Methods inherited from class java.lang.Object

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

Field Detail

EXTRACTOR_ANNOTATION

public static final String EXTRACTOR_ANNOTATION

Annotation to store extracted nodes.

Constructor Detail

LabelServiceExtractOptimizer

public LabelServiceExtractOptimizer()

Method Detail

optimizeJoinGroup

protected void optimizeJoinGroup(com.bigdata.rdf.sparql.ast.eval.AST2BOpContext ctx,
                     com.bigdata.rdf.sparql.ast.StaticAnalysis sa,
                     com.bigdata.bop.IBindingSet[] bSets,
                     com.bigdata.rdf.sparql.ast.JoinGroupNode op)

Specified by:

optimizeJoinGroup in class com.bigdata.rdf.sparql.ast.optimizers.AbstractJoinGroupOptimizer