com.bigdata.rdf.sparql.ast.explainhints

Class UnsatisfiableMinusExplainHint

java.lang.Object

com.bigdata.rdf.sparql.ast.explainhints.ExplainHint

com.bigdata.rdf.sparql.ast.explainhints.UnsatisfiableMinusExplainHint

All Implemented Interfaces:

IExplainHint

public class UnsatisfiableMinusExplainHint
extends ExplainHint

Explain hint indicating a MINUS expression that is unsatisfiable, i.e. does not have any effect at all. This happens if the left- and right-hand side of the minus have no variables in common. In such cases, the minus is optimized away, and there's most likely a problem in the query.

Version:

$Id$

Author:

Michael Schmidt

Nested Class Summary

Nested classes/interfaces inherited from interface com.bigdata.rdf.sparql.ast.explainhints.IExplainHint

IExplainHint.ExplainHintCategory, IExplainHint.ExplainHintSeverity

Constructor Summary

Constructors

Constructor and Description
UnsatisfiableMinusExplainHint(BOp explainHintASTBase)

Method Summary

Methods inherited from class com.bigdata.rdf.sparql.ast.explainhints.ExplainHint

getExplainHintCategory, getExplainHintDescription, getExplainHintNode, getExplainHintSeverity, getExplainHintType, getHelpLink, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

UnsatisfiableMinusExplainHint

public UnsatisfiableMinusExplainHint(BOp explainHintASTBase)