disjunction_query Class Reference

The disjunction query is a compound query. More...

#include <couchbase/disjunction_query.hxx>

Inheritance diagram for disjunction_query:

Public Member Functions
template<typename... SearchQuery>
	disjunction_query (SearchQuery &&... queries)
	Create a disjunction query.
template<typename... SearchQuery>
auto	or_else (SearchQuery... queries) -> disjunction_query &
	Add one or more queries to add to the disjunction.
auto	min (std::uint32_t number_of_queries) -> disjunction_query &
	Set the minimum number of child queries that must be satisfied for the disjunction query.
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

The disjunction query is a compound query.

The result documents must satisfy a configurable minimal (min) number of child queries. By default this min is set to 1.

At execution, a conjunction query that has no child queries is not allowed and will fail fast.

Match documents with at least one (see min) of the following conditions is satisfied:

• "location" in the field reviews.content
• true in the field free_breakfast.

auto query = couchbase::disjunction_query{
  couchbase::match_query("location hostel").field("reviews.content"),
  couchbase::boolean_field_query(true).field("free_breakfast"),
  couchbase::boolean_field_query(true).field("late_check_in"),
}.min(2);

See also

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

Since

1.0.0

Committed

Generally available API and should be preferred in production

Constructor & Destructor Documentation

disjunction_query()

template<typename... SearchQuery>

disjunction_query ( SearchQuery &&... queries )

inlineexplicit

Create a disjunction query.

Template Parameters

SearchQuery

any subclass of search_query

Parameters

queries

sequence of query arguments

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.

min()

auto min ( std::uint32_t number_of_queries ) -> disjunction_query&

inline

Set the minimum number of child queries that must be satisfied for the disjunction query.

Parameters

number_of_queries

minimum number of child queries.

Returns

this query for chaining purposes.

Since

1.0.0

Committed

Generally available API and should be preferred in production

or_else()

template<typename... SearchQuery>

auto or_else ( SearchQuery... queries ) -> disjunction_query&

inline

Add one or more queries to add to the disjunction.

Template Parameters

SearchQuery

any subclass of search_query

Parameters

queries

sequence of query arguments

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/disjunction_query.hxx