DuckDB

Description

The duckdb offline store provides support for reading FileSources. It can read both Parquet and Delta formats. DuckDB offline store uses ibis under the hood to convert offline store operations to DuckDB queries.

• Entity dataframes can be provided as a Pandas dataframe.

Getting started

In order to use this offline store, you'll need to run pip install 'feast[duckdb]'.

Example

feature_store.yaml

project: my_project
registry: data/registry.db
provider: local
offline_store:
    type: duckdb
online_store:
    path: data/online_store.db

Functionality Matrix

The set of functionality supported by offline stores is described in detail here. Below is a matrix indicating which functionality is supported by the DuckDB offline store.

	DuckdDB
get_historical_features (point-in-time correct join)	yes
pull_latest_from_table_or_query (retrieve latest feature values)	yes
pull_all_from_table_or_query (retrieve a saved dataset)	yes
offline_write_batch (persist dataframes to offline store)	yes
write_logged_features (persist logged features to offline store)	yes

Below is a matrix indicating which functionality is supported by IbisRetrievalJob.

	DuckDB
export to dataframe	yes
export to arrow table	yes
export to arrow batches	no
export to SQL	no
export to data lake (S3, GCS, etc.)	no
export to data warehouse	no
export as Spark dataframe	no
local execution of Python-based on-demand transforms	yes
remote execution of Python-based on-demand transforms	no
persist results in the offline store	yes
preview the query plan before execution	no
read partitioned data	yes

To compare this set of functionality against other offline stores, please see the full functionality matrix.