org.exist.xquery
Interface Optimizable

All Superinterfaces:

Expression

All Known Implementing Classes:

AbstractMatchFunction, DeprecatedExtRegexp, DeprecatedExtRegexpOr, ExtFulltext, ExtNear, ExtPhrase, FunMatches, FunReplace, FunTokenize, FuzzyMatchAll, FuzzyMatchAny, GeneralComparison, MatchRegexp, NGramSearch, Query, QueryField, ValueComparison

public interface Optimizable
extends Expression

Field Summary

Fields inherited from interface org.exist.xquery.Expression

DOT_TEST, EXPRESSION_ID_INVALID, IGNORE_CONTEXT, IN_NODE_CONSTRUCTOR, IN_PREDICATE, IN_UPDATE, IN_WHERE_CLAUSE, NEED_INDEX_INFO, NO_CONTEXT_ID, NON_STREAMABLE, POSITIONAL_PREDICATE, SINGLE_STEP_EXECUTION, UNORDERED, USE_TREE_TRAVERSAL

Method Summary

boolean	canOptimize(Sequence contextSequence)
int	getOptimizeAxis()
boolean	optimizeOnChild()
boolean	optimizeOnSelf()
NodeSet	preSelect(Sequence contextSequence, boolean useContext)

Methods inherited from interface org.exist.xquery.Expression

accept, allowMixNodesInReturn, analyze, dump, eval, eval, getCardinality, getColumn, getContext, getContextDocSet, getContextId, getDependencies, getExpressionId, getLine, getParent, getPrimaryAxis, getSource, getSubExpression, getSubExpressionCount, match, needsReset, resetState, returnsType, setASTNode, setContextDocSet, setContextId, setLocation, setPrimaryAxis, simplify

Method Detail

canOptimize

boolean canOptimize(Sequence contextSequence)

optimizeOnSelf

boolean optimizeOnSelf()

optimizeOnChild

boolean optimizeOnChild()

preSelect

NodeSet preSelect(Sequence contextSequence,
                  boolean useContext)
                  throws XPathException

Throws:

XPathException

getOptimizeAxis

int getOptimizeAxis()