Package cz.cvut.kbss.jopa.query

Class QueryHints

java.lang.Object

cz.cvut.kbss.jopa.query.QueryHints

public class QueryHints
extends Object

Defines query hints supported by JOPA.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DISABLE_INFERENCE	Indicates that inferred results should be omitted from query results.
static final String	ENABLE_ENTITY_LOADING_OPTIMIZER	Enables the use of optimized SPARQL query assembly and entity loading.
static final String	TARGET_ONTOLOGY	Allows specifying the target ontology for query execution.

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

DISABLE_INFERENCE

public static final String DISABLE_INFERENCE

Indicates that inferred results should be omitted from query results.

See Also:

• Constant Field Values

TARGET_ONTOLOGY

public static final String TARGET_ONTOLOGY

Allows specifying the target ontology for query execution.

By target ontology, it is meant either the shared ontology, which does not contain pending transactional changes, or the transactional ontology (w.r.t. the persistence context issuing the query), where transactional changes may influence the query results.

Note that OntoDriver implementations may choose to ignore the selection depending on their internal transaction and query execution mechanism.

Valid values are CENTRAL and TRANSACTIONAL.

See Also:

• Constant Field Values

ENABLE_ENTITY_LOADING_OPTIMIZER

public static final String ENABLE_ENTITY_LOADING_OPTIMIZER

Enables the use of optimized SPARQL query assembly and entity loading.

The optimized SPARQL query assembly and entity loading adjusts the query to load all entity attribute values as part of the query execution and reconstructs the resulting entities from the query results, instead of loading them one by one.

See Also:

• Constant Field Values