Definition
Important
The $vectorSearch aggregation pipeline stage is only available
for collections hosted on MongoDB Atlas cluster tiers
running MongoDB version 6.0.11 or later. To learn more, see
Vector Search.
$vectorSearch$vectorSearchperforms a semantic search on data in your Atlas cluster.If you store vector embeddings on your Atlas cluster, you can seamlessly index the vector data along with your other collection data. You can use the
$vectorSearchstage to pre-filter your data and perform semantic search against the indexed fields.Your vector data must be less than or equal to 4096 dimensions in width.
Behavior
Starting in MongoDB 8.0, you can use a $vectorSearch stage in a
$unionWith stage.
Limitations
You cannot use a $vectorSearch stage in a $facet
stage or a $lookup stage.
Learn More
To learn more about creating Vector Search indexes, see Index Vector Embeddings.
To learn more about
$vectorSearchpipeline stage syntax and usage, see Vector Search Queries.