Fuzzy Search

• A fuzzy search retrieves documents containing terms that closely match a given term instead of exact matches, assisting in finding relevant results when the search term is misspelled or has minor variations.

• Fuzzy search is available only via DocumentQuery or RQL.

• Use the Fuzzy method when querying with WhereEquals.

• In this page:

  • Fuzzy search example
  • Syntax

Fuzzy search example

• DocumentQuery
• DocumentQuery_async
• RQL

List<Company> companies = session.Advanced
  .DocumentQuery<Company>()
   // Query with a term that is misspelled
  .WhereEquals(x => x.Name, "Ernts Hnadel")
  // Call 'Fuzzy' 
  // Pass the required similarity, a decimal param between 0.0 and 1.0
  .Fuzzy(0.5m)
  .ToList();

// Running the above query on the Northwind sample data returns document: companies/20-A
// which contains "Ernst Handel" in its Name field.

List<Company> companies = await asyncSession.Advanced
  .AsyncDocumentQuery<Company>()
   // Query with a term that is misspelled
  .WhereEquals(x => x.Name, "Ernts Hnadel")
   // Call 'Fuzzy' 
   // Pass the required similarity, a decimal param between 0.0 and 1.0
  .Fuzzy(0.5m)
  .ToListAsync();

// Running the above query on the Northwind sample data returns document: companies/20-A
// which contains "Ernst Handel" in its Name field.

from "Companies"
where fuzzy(Name = "Ernts Hnadel", 0.5)

Syntax

IDocumentQuery<T> Fuzzy(decimal fuzzy);

Parameter	Type	Description
fuzzy	decimal	A value between 0.0 and 1.0. With a value closer to 1.0, terms with a higher similarity will be matched.