feat: Implement Databricks Unity Catalog offline store integration by falloficaruss · Pull Request #6515 · feast-dev/feast
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When users run feast apply or feast plan with source validation enabled, this subclass still inherits OfflineStore.validate_data_source and get_table_column_names_and_types_from_data_source, so validation goes through SparkSource.validate() and starts a plain Spark session via get_spark_session_or_start_new_with_repoconfig instead of this Databricks helper. In a local Databricks Connect setup with no active Databricks session, UC tables are validated against a local/non-UC Spark session and fail before any of the wrapped retrieval methods run; override these validation/schema methods to initialize the Databricks session too.
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