Full-Text Search with Index

The index:

class Employees_ByNotes extends AbstractJavaScriptIndexCreationTask {

    constructor() {
        super();

        // Define the index-fields 
        this.map("Employees", e => ({
            employeeNotes : e.Notes
        }));

        // Configure the index-field for FTS:
        // Set 'Search' on index-field 'employeeNotes'
        this.index("employeeNotes", "Search");
        
        // Optionally: Set your choice of analyzer for the index-field.
        // Here the text from index-field 'employeeNotes' will be tokenized by 'WhitespaceAnalyzer'.
        this.analyze("employeeNotes", "WhitespaceAnalyzer");

        // Note:
        // If no analyzer is set then the default 'RavenStandardAnalyzer' is used.
    }
}

Query with Search:

• Using the search method has the advantage of using any of its functionalities,
  such as using wildcards, searching for multiple terms, etc.

• Refer to Full-Text search with dynamic queries for all available Search options.

const employees = await session
     // Query the index
    .query({ indexName: "Employees/ByNotes" })
     // Call 'Search':
     // pass the index field name that was configured for FTS and the term to search for.
    .search("employeeNotes", "French")
    .all();

// * Results will contain all Employee documents that have 'French' in their 'Notes' field.
//
// * Search is case-sensitive since field was indexed using the 'WhitespaceAnalyzer'
//   which preserves casing.

from index "Employees/ByNotes"
where search(employeeNotes, "French")

The index:

class Employees_ByEmployeeData extends AbstractJavaScriptIndexCreationTask {

    constructor() {
        super();

        // Define the index-fields 
        this.map("Employees", e => ({
            // Multiple document-fields can be indexed
            // into the single index-field 'employeeData' 
            employeeData : [e.FirstName, e.LastName, e.Title, e.Notes]
        }));

        // Configure the index-field for FTS:
        // Set 'Search' on index-field 'employeeNotes'
        this.index("employeeNotes", "Search");

        // Note:
        // Since no analyzer is set then the default 'RavenStandardAnalyzer' is used.
    }
}

Sample query:

const employees = await session
     // Query the static-index
    .query({ indexName: "Employees/ByEmployeeData" })
    .openSubclause()
     // A logical OR is applied between the following two Search calls:
    .search("employeeData", "Manager")
     // A logical AND is applied between the following two terms: 
    .search("employeeData", "French Spanish", "AND")
    .closeSubclause()
    .all();

// * Results will contain all Employee documents that have:
//   ('Manager' in any of the 4 document-fields that were indexed)
//   OR 
//   ('French' AND 'Spanish' in any of the 4 document-fields that were indexed)
//
// * Search is case-insensitive since the default analyzer is used

from index "Employees/ByEmployeeData"
where (search(employeeData, "Manager") or search(employeeData, "French Spanish", and))