Overview

Functionality

In Feast, each batch data source is associated with a corresponding offline store. For example, a SnowflakeSource can only be processed by the Snowflake offline store. Otherwise, the primary difference between batch data sources is the set of supported types. Feast has an internal type system, and aims to support eight primitive types (bytes, string, int32, int64, float32, float64, bool, and timestamp) along with the corresponding array types. However, not every batch data source supports all of these types.

For more details on the Feast type system, see here.

Functionality Matrix

There are currently four core batch data source implementations: FileSource, BigQuerySource, SnowflakeSource, and RedshiftSource. There are several additional implementations contributed by the Feast community (PostgreSQLSource, SparkSource, and TrinoSource), which are not guaranteed to be stable or to match the functionality of the core implementations. Details for each specific data source can be found here.

Below is a matrix indicating which data sources support which types.

FileBigQuerySnowflakeRedshiftPostgresSparkTrino

bytes

yes

yes

yes

yes

yes

yes

yes

string

yes

yes

yes

yes

yes

yes

yes

int32

yes

yes

yes

yes

yes

yes

yes

int64

yes

yes

yes

yes

yes

yes

yes

float32

yes

yes

yes

yes

yes

yes

yes

float64

yes

yes

yes

yes

yes

yes

yes

bool

yes

yes

yes

yes

yes

yes

yes

timestamp

yes

yes

yes

yes

yes

yes

yes

array types

yes

yes

no

no

yes

yes

no