# SingleStore

## Description

The SingleStore online store provides support for materializing feature values into a SingleStore database for serving online features.

## Getting started

In order to use this online store, you'll need to run `pip install 'feast[singlestore]'`. You can get started by then running `feast init` and then setting the `feature_store.yaml` as described below.

## Example

{% code title="feature\_store.yaml" %}

```yaml
project: my_feature_repo
registry: data/registry.db
provider: local
online_store:
    type: singlestore
    host: DB_HOST
    port: DB_PORT
    database: DB_NAME
    user: DB_USERNAME
    password: DB_PASSWORD
```

{% endcode %}

## Functionality Matrix

The set of functionality supported by online stores is described in detail [here](https://docs.feast.dev/v0.48-branch/reference/overview#functionality).\
Below is a matrix indicating which functionality is supported by the SingleStore online store.

|                                                           | SingleStore |
| --------------------------------------------------------- | ----------- |
| write feature values to the online store                  | yes         |
| read feature values from the online store                 | yes         |
| update infrastructure (e.g. tables) in the online store   | yes         |
| teardown infrastructure (e.g. tables) in the online store | yes         |
| generate a plan of infrastructure changes                 | no          |
| support for on-demand transforms                          | yes         |
| readable by Python SDK                                    | yes         |
| readable by Java                                          | no          |
| readable by Go                                            | no          |
| support for entityless feature views                      | yes         |
| support for concurrent writing to the same key            | no          |
| support for ttl (time to live) at retrieval               | no          |
| support for deleting expired data                         | no          |
| collocated by feature view                                | yes         |
| collocated by feature service                             | no          |
| collocated by entity key                                  | no          |

To compare this set of functionality against other online stores, please see the full [functionality matrix](https://docs.feast.dev/v0.48-branch/reference/overview#functionality-matrix).