org.eclipse.viatra.query.runtime.rete.util

Class ReteHintOptions

java.lang.Object

org.eclipse.viatra.query.runtime.rete.util.ReteHintOptions

public final class ReteHintOptions
extends java.lang.Object

Provides key objects (of type QueryHintOption) for QueryEvaluationHints.

Since:

1.5

Field Summary

Fields

Modifier and Type	Field and Description
static QueryHintOption<java.lang.Boolean>	cacheOutputOfEvaluatorsByDefault
static QueryHintOption<java.lang.Boolean>	checkScopeBoundaries Deprecated. Use the base index option DANGLING_FREE_ASSUMPTION_DEFAULT instead.
static QueryHintOption<java.lang.Boolean>	deleteRederiveEvaluation
static QueryHintOption<java.lang.Boolean>	expandWeakenedAlternativeConstraints This hint allows the query planner to take advantage of "weakened alternative" suggestions of the meta context.
static QueryHintOption<java.lang.Boolean>	prioritizeConstantFiltering
static QueryHintOption<java.lang.Boolean>	useDiscriminatorDispatchersForConstantFiltering

Constructor Summary

Constructors

Constructor and Description
ReteHintOptions()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

useDiscriminatorDispatchersForConstantFiltering

public static final QueryHintOption<java.lang.Boolean> useDiscriminatorDispatchersForConstantFiltering

prioritizeConstantFiltering

public static final QueryHintOption<java.lang.Boolean> prioritizeConstantFiltering

cacheOutputOfEvaluatorsByDefault

public static final QueryHintOption<java.lang.Boolean> cacheOutputOfEvaluatorsByDefault

deleteRederiveEvaluation

public static final QueryHintOption<java.lang.Boolean> deleteRederiveEvaluation

Since:

1.6

checkScopeBoundaries

public static final QueryHintOption<java.lang.Boolean> checkScopeBoundaries

Deprecated. Use the base index option DANGLING_FREE_ASSUMPTION_DEFAULT instead.

This hint disallows the Rete network to remove type checks that can be inferred from other constraints but might leave the model scope. In general, this might result in larger Rete networks, but can avoid hard to debug issues.

Was related to the dangling edges issue http://bugs.eclipse.org/512752, but is now entirely ignored.

Since:

1.6

expandWeakenedAlternativeConstraints

public static final QueryHintOption<java.lang.Boolean> expandWeakenedAlternativeConstraints

This hint allows the query planner to take advantage of "weakened alternative" suggestions of the meta context. For instance, enumerable unary type constraints may be substituted with a simple type filtering where sufficient.

Since:

1.6

Constructor Detail

ReteHintOptions

public ReteHintOptions()