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Spark source (contrib)

Description

Spark data sources are tables or files that can be loaded from some Spark store (e.g. Hive or in-memory). They can also be specified by a SQL query.

New in Feast: SparkSource now supports advanced table formats including Apache Iceberg, Delta Lake, and Apache Hudi, enabling ACID transactions, time travel, and schema evolution capabilities. See the Table Formats guide for detailed documentation.

Disclaimer

The Spark data source does not achieve full test coverage. Please do not assume complete stability.

Examples

Basic Examples

Using a table reference from SparkSession (for example, either in-memory or a Hive Metastore):

from feast.infra.offline_stores.contrib.spark_offline_store.spark_source import (
    SparkSource,
)

my_spark_source = SparkSource(
    table="FEATURE_TABLE",
)

Using a query:

from feast.infra.offline_stores.contrib.spark_offline_store.spark_source import (
    SparkSource,
)

my_spark_source = SparkSource(
    query="SELECT timestamp as ts, created, f1, f2 "
          "FROM spark_table",
)

Using a file reference:

from feast.infra.offline_stores.contrib.spark_offline_store.spark_source import (
    SparkSource,
)

my_spark_source = SparkSource(
    path=f"{CURRENT_DIR}/data/driver_hourly_stats",
    file_format="parquet",
    timestamp_field="event_timestamp",
    created_timestamp_column="created",
)

Table Format Examples

SparkSource supports advanced table formats for modern data lakehouse architectures. For detailed documentation, configuration options, and best practices, see the Table Formats guide.

Apache Iceberg

from feast.infra.offline_stores.contrib.spark_offline_store.spark_source import SparkSource
from feast.table_format import IcebergFormat

iceberg_format = IcebergFormat(
    catalog="my_catalog",
    namespace="my_database"
)

my_spark_source = SparkSource(
    name="user_features",
    path="my_catalog.my_database.user_table",
    table_format=iceberg_format,
    timestamp_field="event_timestamp"
)

Delta Lake

from feast.infra.offline_stores.contrib.spark_offline_store.spark_source import SparkSource
from feast.table_format import DeltaFormat

delta_format = DeltaFormat()

my_spark_source = SparkSource(
    name="transaction_features",
    path="s3://my-bucket/delta-tables/transactions",
    table_format=delta_format,
    timestamp_field="transaction_timestamp"
)

Apache Hudi

from feast.infra.offline_stores.contrib.spark_offline_store.spark_source import SparkSource
from feast.table_format import HudiFormat

hudi_format = HudiFormat(
    table_type="COPY_ON_WRITE",
    record_key="user_id",
    precombine_field="updated_at"
)

my_spark_source = SparkSource(
    name="user_profiles",
    path="s3://my-bucket/hudi-tables/user_profiles",
    table_format=hudi_format,
    timestamp_field="event_timestamp"
)

For advanced configuration including time travel, incremental queries, and performance tuning, see the Table Formats guide.

Configuration Options

The full set of configuration options is available here.

Table Format Options

Supported Types

Spark data sources support all eight primitive types and their corresponding array types. For a comparison against other batch data sources, please see here.