Learn the "why" behind slow queries and how to fix them in our 2-Part Webinar.
Register now >
Products
Platform
Atlas
Build and scale with an AI-ready platform
Platform Services
Database
Deploy a multi-cloud database
Search
Deliver engaging search experiences
Vector Search
Design intelligent apps with gen AI
Stream Processing
Integrate MongoDB and Kafka
Self Managed
Enterprise Advanced
Run and manage MongoDB yourself
Community Edition
Develop locally with MongoDB
Tools
Compass
Work with MongoDB data in a GUI
Integrations
Integrations with third-party services
Relational Migrator
Migrate to MongoDB with confidence
View All Products
Explore our full developer suite
arrow-right
MongoDB 8.0
Our fastest version ever
arrow-right
Build with MongoDB Atlas
Get started for free in minutes
Sign Up
Test Enterprise Advanced
Develop with MongoDB on-premises
Download
Try Community Edition
Explore the latest version of MongoDB
Download
Resources
Documentation
Atlas Documentation
Get started using Atlas
Server Documentation
Learn to use MongoDB
Tools and Connectors
Learn how to connect to MongoDB
MongoDB Drivers
Use drivers and libraries for MongoDB
Resources Hub
Get help building the next big thing with MongoDB
arrow-right
Connect
Community
Join a global community of developers
Courses and Certification
Learn for free from MongoDB
Events and Webinars
Find an event or webinar near you
Solutions
Use cases
Artificial Intelligence
Modernization
Payments
Serverless Development
Gaming
Intelligent Search
Edge and Mobile
Industries
Financial Services
Telecommunications
Healthcare
Retail
Public Sector
Manufacturing
Solutions Library
Organized and tailored solutions to kick-start projects
arrow-right
AI Applications Program
Expedite your AI journey with expert guidance
Learn more
arrow-right
Startups and AI Innovators
For world-changing ideas and AI pioneers
Learn more
arrow-right
Customer Case Studies
Hear directly from our users
See Stories
arrow-right
Company
Careers
Start your next adventure
Blog
Read articles and announcements
Newsroom
Read press releases and news stories
Partners
Learn about our partner ecosystem
Leadership
Meet our executive team
Company
Learn more about who we are
Contact Us
Reach out to MongoDB
Connect with an expert
arrow-right
Investors
Visit our investor portal
Learn more
arrow-right
Pricing
Eng
Support
Sign In
menu-vertical
Get Started
Products
Platform
Atlas
Build and scale with an AI-ready platform
Platform Services
Database
Deploy a multi-cloud database
Search
Deliver engaging search experiences
Vector Search
Design intelligent apps with gen AI
Stream Processing
Integrate MongoDB and Kafka
Self Managed
Enterprise Advanced
Run and manage MongoDB yourself
Community Edition
Develop locally with MongoDB
Tools
Compass
Work with MongoDB data in a GUI
Integrations
Integrations with third-party services
Relational Migrator
Migrate to MongoDB with confidence
View All Products
Explore our full developer suite
arrow-right
MongoDB 8.0
Our fastest version ever
arrow-right
Build with MongoDB Atlas
Get started for free in minutes
Sign Up
Test Enterprise Advanced
Develop with MongoDB on-premises
Download
Try Community Edition
Explore the latest version of MongoDB
Download
Resources
Documentation
Atlas Documentation
Get started using Atlas
Server Documentation
Learn to use MongoDB
Tools and Connectors
Learn how to connect to MongoDB
MongoDB Drivers
Use drivers and libraries for MongoDB
Resources Hub
Get help building the next big thing with MongoDB
arrow-right
Connect
Community
Join a global community of developers
Courses and Certification
Learn for free from MongoDB
Events and Webinars
Find an event or webinar near you
Solutions
Use cases
Artificial Intelligence
Modernization
Payments
Serverless Development
Gaming
Intelligent Search
Edge and Mobile
Industries
Financial Services
Telecommunications
Healthcare
Retail
Public Sector
Manufacturing
Solutions Library
Organized and tailored solutions to kick-start projects
arrow-right
AI Applications Program
Expedite your AI journey with expert guidance
Learn more
arrow-right
Startups and AI Innovators
For world-changing ideas and AI pioneers
Learn more
arrow-right
Customer Case Studies
Hear directly from our users
See Stories
arrow-right
Company
Careers
Start your next adventure
Blog
Read articles and announcements
Newsroom
Read press releases and news stories
Partners
Learn about our partner ecosystem
Leadership
Meet our executive team
Company
Learn more about who we are
Contact Us
Reach out to MongoDB
Connect with an expert
arrow-right
Investors
Visit our investor portal
Learn more
arrow-right
Pricing
Eng
Support
Sign In
menu-vertical
Get Started
Docs Home
Get Started
Development
Database Manual
Select a version
Overview
Documents
Databases & Collections
Client Libraries
Connect to Clusters
Database Users
CRUD Operations
Indexes
Data Modeling
Aggregation Operations
Search
Quick Start
Queries & Indexes
Manage Indexes
Index Reference
Analyzers
Field Mappings
array
autocomplete
boolean
date
dateFacet
document
embeddedDocuments
geo
knnVector
number
numberFacet
objectId
string
stringFacet
token
uuid
vector
Stored Source
Synonym Mappings
Index Partitions
Query Reference
Search Playground
Improve Accuracy
Improve Performance
Review Deployment Options
Monitor Atlas Search
Design Search for Your Data Model
Compatibility & Limitations
Changelog
Vector Search
Time Series
Change Streams
Transactions
Data Federation
In-Use Encryption
Development Checklist
Replication
Sharding
Performance
Reference
Support
Build AI Applications
AI Models
AI Integrations
AI Agents
Streaming Data
Atlas Stream Processing
Atlas Triggers
Release Notes
Server Release Notes
Atlas Release Notes
Search Release Notes
Vector Search Release Notes
Management
Client Libraries
Tools
AI Models
Atlas Architecture Center
Docs Home
Get Started
Development
Management
Client Libraries
Tools
AI Models
Atlas Architecture Center
Database Manual
Select a version
Overview
Documents
Databases & Collections
Client Libraries
Connect to Clusters
Database Users
CRUD Operations
Indexes
Data Modeling
Aggregation Operations
Search
Quick Start
Queries & Indexes
Manage Indexes
Index Reference
Analyzers
Field Mappings
array
autocomplete
boolean
date
dateFacet
document
embeddedDocuments
geo
knnVector
number
numberFacet
objectId
string
stringFacet
token
uuid
vector
Stored Source
Synonym Mappings
Index Partitions
Query Reference
Search Playground
Improve Accuracy
Improve Performance
Review Deployment Options
Monitor Atlas Search
Design Search for Your Data Model
Compatibility & Limitations
Changelog
Vector Search
Time Series
Change Streams
Transactions
Data Federation
In-Use Encryption
Development Checklist
Replication
Sharding
Performance
Reference
Support
Build AI Applications
AI Models
AI Integrations
AI Agents
Streaming Data
Atlas Stream Processing
Atlas Triggers
Release Notes
Server Release Notes
Atlas Release Notes
Search Release Notes
Vector Search Release Notes
Docs Menu
Ask MongoDB AI
Docs Home
/
/
Field Mappings
Docs Home
/
/
Index Reference
/
Field Mappings
Docs Home
/
Development
/
Search
/
Queries & Indexes
/
Index Reference
/
Field Mappings
How to Index Token Fields
Copy page
Deployment Type
Select
Interface
Select
Back
stringFacet
Next
uuid
Rate this page