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.
In order to use this offline store, you'll need to run pip install 'feast[duckdb]'.
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.
Below is a matrix indicating which functionality is supported by IbisRetrievalJob.
To compare this set of functionality against other offline stores, please see the full functionality matrix.
| DuckdDB | |
|---|---|
| DuckDB | |
|---|---|
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
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