term_query Class Reference

A query that looks for exact matches of the term in the index (no analyzer, no stemming). More...

#include <couchbase/term_query.hxx>

Inheritance diagram for term_query:

Public Member Functions
	term_query (std::string term)
	Create a new term query.
auto	prefix_length (std::uint32_t length) -> term_query &
	Require that the term also have the same prefix of the specified length (must be positive).
auto	field (std::string field_name) -> term_query &
	If a field is specified, only terms in that field will be matched.
auto	fuzziness (std::uint32_t fuzziness) -> term_query &
	Perform fuzzy matching.
auto	match_operator (couchbase::match_operator concatenation_operator) -> term_query &
	Defines how the individual match terms should be logically concatenated.
auto	encode () const -> encoded_search_query override
Public Member Functions inherited from search_query
virtual	~search_query ()=default
template<typename derived_query = search_query, std::enable_if_t< std::is_base_of_v< search_query, derived_query >, bool > = true>
auto	boost (double boost) -> derived_query &
	The boost parameter is used to increase the relative weight of a clause (with a boost greater than 1) or decrease the relative weight (with a boost between 0 and 1).

Additional Inherited Members
Protected Member Functions inherited from search_query
	search_query ()=default
Protected Attributes inherited from search_query
std::optional< double >	boost_ {}

Detailed Description

A query that looks for exact matches of the term in the index (no analyzer, no stemming).

Useful to check what the actual content of the index is. It can also apply fuzziness on the term. Usual better alternative is match_query.

See also

https://docs.couchbase.com/server/current/fts/fts-supported-queries-term.html server documentation

https://docs.couchbase.com/server/current/fts/fts-supported-queries-fuzzy.html fuzzy search

Since

1.0.0

Committed

Generally available API and should be preferred in production

Constructor & Destructor Documentation

term_query()

term_query ( std::string term )

inlineexplicit

Create a new term query.

The mandatory term is the exact string that will be searched into the index. Note that the index can (and usually will) contain terms that are derived from the text in documents, as analyzers can apply process like stemming. For example, indexing "programming" could store "program" in the index. As a term query doesn't apply the analyzers, one would need to look for "program" to have a match on that index entry.

Parameters

term	the input string to be matched against

Since

1.0.0

Committed

Generally available API and should be preferred in production

Member Function Documentation

encode()

auto encode ( ) const -> encoded_search_query

overridevirtual

Returns

encoded representation of the query.

Since

1.0.0

Internal

Internal interface

Implements search_query.

field()

auto field ( std::string field_name ) -> term_query&

inline

If a field is specified, only terms in that field will be matched.

Parameters

field_name

name of the field to be matched

Returns

this query for chaining purposes.

Since

1.0.0

Committed

Generally available API and should be preferred in production

fuzziness()

auto fuzziness ( std::uint32_t fuzziness ) -> term_query&

inline

Perform fuzzy matching.

If the fuzziness parameter is set to a non-zero integer the analyzed text will be matched with the specified level of fuzziness.

Parameters

fuzziness

level of fuzziness (the maximum supported fuzziness is 2).

Returns

this query for chaining purposes.

Since

1.0.0

Committed

Generally available API and should be preferred in production

match_operator()

auto match_operator ( couchbase::match_operator concatenation_operator ) -> term_query&

inline

Defines how the individual match terms should be logically concatenated.

Parameters

concatenation_operator

operator to be used

Returns

this query for chaining purposes.

Since

1.0.0

Committed

Generally available API and should be preferred in production

prefix_length()

auto prefix_length ( std::uint32_t length ) -> term_query&

inline

Require that the term also have the same prefix of the specified length (must be positive).

The prefix length only makes sense when fuzziness is enabled. It allows to apply the fuzziness only on the part of the term that is after the length character mark.

For example, with the term "something" and a prefix length of 4, only the "thing" part of the term will be fuzzy-searched, and hits must start with "some".

Parameters

length

the length of the term prefix

Returns

this query for chaining purposes.

Since

1.0.0

Committed

Generally available API and should be preferred in production

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The documentation for this class was generated from the following file:

• couchbase/term_query.hxx