org.nuxeo.ecm.core.storage.dbs

Class DBSQueryOptimizer

java.lang.Object

org.nuxeo.ecm.core.storage.QueryOptimizer

org.nuxeo.ecm.core.storage.dbs.DBSQueryOptimizer

public class DBSQueryOptimizer
extends QueryOptimizer

DBS-specific query optimizer.

Knows how reference prefixes are computed, especially for the ACL case which has a storage structure different than what the NXQL syntax suggests.

Since:

9.3

Nested Class Summary

Nested classes/interfaces inherited from class org.nuxeo.ecm.core.storage.QueryOptimizer

QueryOptimizer.PrefixInfo, QueryOptimizer.ProjectionReferenceRenamer, QueryOptimizer.ProjectionWildcardsFinder, QueryOptimizer.ReferencePrefixAnalyzer

Field Summary

Fields

Modifier and Type	Field and Description
protected static Pattern	CORRELATED_ECM_TAG
protected static String	CORRELATED_ECM_TAG_IMPLICIT
protected static Pattern	CORRELATED_WILDCARD_SPLIT

Fields inherited from class org.nuxeo.ecm.core.storage.QueryOptimizer

CORR_BASE, correlationCounter, facetFilter, GROUPING_BY_EXPR_PREFIX, neverPerInstanceMixins, onlyRelations, schemaManager, TYPE_DOCUMENT, TYPE_RELATION, TYPE_ROOT

Constructor Summary

Constructors

Constructor and Description
DBSQueryOptimizer()

Method Summary

Modifier and Type	Method and Description
String	getCorrelatedWildcardPrefix(String name) Gets the prefix to use for this reference name (NXQL) if it contains a correlated wildcard.

Methods inherited from class org.nuxeo.ecm.core.storage.QueryOptimizer

addFacetFilters, addIsNotNullClauses, addTypes, addWhere, addWhere, addWildcardNotNullClauses, findPrefix, getDocumentTypeNamesExtending, getDocumentTypeNamesForFacet, getExpressionCount, getPredicatePrefix, getStringLiterals, isTypeRelation, makeSingleAndPredicate, optimize, reorganizeGroupedExpressions, simplifyTypes, withFacetFilter

Methods inherited from class java.lang.Object

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

Field Detail

CORRELATED_WILDCARD_SPLIT

protected static final Pattern CORRELATED_WILDCARD_SPLIT

CORRELATED_ECM_TAG

protected static final Pattern CORRELATED_ECM_TAG

CORRELATED_ECM_TAG_IMPLICIT

protected static final String CORRELATED_ECM_TAG_IMPLICIT

See Also:

Constant Field Values

Constructor Detail

DBSQueryOptimizer

public DBSQueryOptimizer()

Method Detail

getCorrelatedWildcardPrefix

public String getCorrelatedWildcardPrefix(String name)

Description copied from class: QueryOptimizer

Gets the prefix to use for this reference name (NXQL) if it contains a correlated wildcard.

The prefix is used to group together sets of expression that all use references with the same prefix.

Specified by:

getCorrelatedWildcardPrefix in class QueryOptimizer

Parameters:

name - the reference name (NXQL)

Returns:

the prefix, or an empty string if there is no correlated wildcard