org.nuxeo.ecm.core.storage

Class QueryOptimizer

java.lang.Object

org.nuxeo.ecm.core.storage.QueryOptimizer

public class QueryOptimizer
extends Object

Generic optimizer for a NXQL query.

Since:

5.9.4

Field Summary

Fields

Modifier and Type	Field and Description
protected Set<String>	neverPerInstanceMixins
protected boolean	onlyRelations Do we match only relations?
protected SchemaManager	schemaManager
protected LinkedList<Operand>	toplevelOperands
static String	TYPE_DOCUMENT
static String	TYPE_RELATION
static String	TYPE_ROOT

Constructor Summary

Constructors

Constructor and Description
QueryOptimizer()

Method Summary

Modifier and Type	Method and Description
protected void	addFacetFilterClauses(FacetFilter facetFilter)
protected void	analyzeToplevelOperands(Operand node) Expand toplevel ANDed operands into simple list.
MultiExpression	getOptimizedQuery(SQLQuery query, FacetFilter facetFilter)
protected static Set<String>	getStringLiterals(LiteralList list)
protected void	simplifyToplevelOperands() Simplify ecm:primaryType positive references, and non-per-instance mixin types.
protected void	visitFromClause(FromClause node) Finds all the types to take into account (all concrete types being a subtype of the passed types) based on the FROM list.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_ROOT

public static final String TYPE_ROOT

See Also:

Constant Field Values

TYPE_DOCUMENT

public static final String TYPE_DOCUMENT

See Also:

Constant Field Values

TYPE_RELATION

public static final String TYPE_RELATION

See Also:

Constant Field Values

schemaManager

protected final SchemaManager schemaManager

neverPerInstanceMixins

protected final Set<String> neverPerInstanceMixins

toplevelOperands

protected final LinkedList<Operand> toplevelOperands

onlyRelations

protected boolean onlyRelations

Do we match only relations?

Constructor Detail

QueryOptimizer

public QueryOptimizer()

Method Detail

getOptimizedQuery

public MultiExpression getOptimizedQuery(SQLQuery query,
                                         FacetFilter facetFilter)

addFacetFilterClauses

protected void addFacetFilterClauses(FacetFilter facetFilter)

visitFromClause

protected void visitFromClause(FromClause node)

Finds all the types to take into account (all concrete types being a subtype of the passed types) based on the FROM list.

Adds them as a ecm:primaryType match in the toplevel operands.

analyzeToplevelOperands

protected void analyzeToplevelOperands(Operand node)

Expand toplevel ANDed operands into simple list.

simplifyToplevelOperands

protected void simplifyToplevelOperands()

Simplify ecm:primaryType positive references, and non-per-instance mixin types.

getStringLiterals

protected static Set<String> getStringLiterals(LiteralList list)