Class FilterSelectivityKeys

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.optimizer.FilterSelectivityKeys

public final class FilterSelectivityKeys
extends Object

Utility methods for deriving stable keys used by learned filter selectivity tracking.

Method Summary

Modifier and Type	Method	Description
static boolean	conditionIntersectsPattern(ValueExpr condition, StatementPattern pattern)
static String	filterKeyFor(ValueExpr condition)
static String	filterTemplateKeyFor(ValueExpr condition, StatementPattern patternLocalBase)
static Set<StatementPattern>	originPatternsForFilter(Filter filter)
static PatternKey	patternKeyFor(StatementPattern pattern)
static StatementPattern	patternLocalBaseForFilter(Filter filter)
static String	qualifyFilterKey(String filterKey, int localBoundComponentMask)

Methods inherited from class Object

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

Method Details

patternKeyFor

public static PatternKey patternKeyFor(StatementPattern pattern)

filterKeyFor

public static String filterKeyFor(ValueExpr condition)

filterTemplateKeyFor

public static String filterTemplateKeyFor(ValueExpr condition,
 StatementPattern patternLocalBase)

qualifyFilterKey

public static String qualifyFilterKey(String filterKey,
 int localBoundComponentMask)

patternLocalBaseForFilter

public static StatementPattern patternLocalBaseForFilter(Filter filter)

originPatternsForFilter

public static Set<StatementPattern> originPatternsForFilter(Filter filter)

conditionIntersectsPattern

public static boolean conditionIntersectsPattern(ValueExpr condition,
 StatementPattern pattern)