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Boost Search Results
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When querying with some filtering conditions,
a basic score is calculated for each document in the results by the underlying engine. -
Providing a boost value to some fields allows you to prioritize the resulting documents.
The boost value is integrated with the basic score, making the document rank higher. -
Boosting can be achieved in the following ways:
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At query time:
Apply a boost factor to searched terms at query time - as described in this article. -
Via index definition:
Apply a boost factor in your index definition - see this boosting indexing article.
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The automatic ordering of the results by the score is configurable.
Learn more here: automatic score-based ordering -
The calculated score details of the results can be retrieved if needed.
Learn more here: get resulting score -
In this page:
Boost results - when making a full-text search
const employees = await session
// Make a dynamic full-text search Query on 'Employees' collection
.query({ collection: "Employees"})
// This search predicate will use the default boost value of 1
.search('Notes', 'English')
// This search predicate will use a boost value of 10
.search('Notes', 'Italian')
// Call 'boost' to set the boost value of the previous 'search' call
.boost(10)
.all();
// * Results will contain all Employee documents that have
// EITHER 'English' OR 'Italian' in their 'Notes' field (case-insensitive).
//
// * Matching documents that contain 'Italian' will get a HIGHER score
// than those that contain 'English'.
//
// * Unless configured otherwise, the resulting documents will be ordered by their score. from "Employees" where
search(Notes, "English") or boost(search(Notes, "Italian"), 10)
{"p0":"English","p1":"Italian"}
Boost results - when querying with where clause
const companies = await session
// Make a dynamic DocumentQuery on 'Companies' collection
.query({ collection: "Companies"})
// Define a 'where' condition
.whereStartsWith("Name", "O")
// Call 'boost' to set the boost value of the previous 'where' predicate
.boost(10)
// Call 'orElse' so that OR operator will be used between statements
.orElse()
.whereStartsWith("Name", "P")
.boost(50)
.orElse()
.whereEndsWith("Name", "OP")
.boost(90)
.all();
// * Results will contain all Company documents that either
// (start-with 'O') OR (start-with 'P') OR (end-with 'OP') in their 'Name' field (case-insensitive).
//
// * Matching documents that end-with 'OP' will get the HIGHEST scores.
// Matching documents that start-with 'O' will get the LOWEST scores.
//
// * Unless configured otherwise, the resulting documents will be ordered by their score.from "Companies" where
boost(startsWith(Name, "O"), 10) or
boost(startsWith(Name, "P"), 50) or
boost(endsWith(Name, "OP"), 90)
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