Package org.apache.solr.search

Class RankQParserPlugin

java.lang.Object

org.apache.solr.search.QParserPlugin

org.apache.solr.search.RankQParserPlugin

All Implemented Interfaces:

NamedListInitializedPlugin

public class RankQParserPlugin
extends QParserPlugin

RankQParserPlugin can be used to introduce document-depending scoring factors to ranking. While this QParser delivers a (subset of) functionality already available via FunctionQParser, the benefit is that RankQParserPlugin can be used in combination with the minExactCount to use BlockMax-WAND algorithm (skip non-competitive documents) to provide faster responses.

Since:

8.6

See Also:

• RankField

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RankQParserPlugin.RankQParser

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EXPONENT
static final String	FIELD
static final String	FUNCTION
static final String	NAME
static final String	PIVOT
static final String	SCALING_FACTOR
static final String	WEIGHT

Fields inherited from class org.apache.solr.search.QParserPlugin

DEFAULT_QTYPE, standardPlugins

Constructor Summary

Constructors

Constructor	Description
RankQParserPlugin()

Method Summary

Modifier and Type	Method	Description
QParser	createParser(String qstr, org.apache.solr.common.params.SolrParams localParams, org.apache.solr.common.params.SolrParams params, SolrQueryRequest req)	Creates the QParser.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.util.plugin.NamedListInitializedPlugin

init

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

FIELD

public static final String FIELD

See Also:

• Constant Field Values

FUNCTION

public static final String FUNCTION

See Also:

• Constant Field Values

WEIGHT

public static final String WEIGHT

See Also:

• Constant Field Values

PIVOT

public static final String PIVOT

See Also:

• Constant Field Values

SCALING_FACTOR

public static final String SCALING_FACTOR

See Also:

• Constant Field Values

EXPONENT

public static final String EXPONENT

See Also:

• Constant Field Values

Constructor Details

RankQParserPlugin

public RankQParserPlugin()

Method Details

createParser

public QParser createParser(String qstr,
 org.apache.solr.common.params.SolrParams localParams,
 org.apache.solr.common.params.SolrParams params,
 SolrQueryRequest req)

Description copied from class: QParserPlugin

Creates the QParser.

Specified by:

createParser in class QParserPlugin

See Also:

• QParser(String, SolrParams, SolrParams, SolrQueryRequest)