Delta Lake-based Cubic ODS fact table generation job#203
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ealexa05
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Approving for testing in dev over the weekend, still want to think through this carefully. Exciting stuff!
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This adds a new OdinJob instance, CubicODSDelta, which sits parallel to the current CubicODSFact, reading the same history table and snapshot paths and writing fact tables (in delta lake’s parquet format) to a new fact table path: s3://mbta-ctd-dataplatform-dev-springboard/odin/data/cubic/ods_delta . This new path is given a new schema definition in duck_db.py, which is structured read the delta format via delta_scan, and so becomes a new schema
cubic_deltaavailable in the data repository.Importantly, this new job makes no use of the parquet handling utility code in odin/src/utils/parquet.py. Fact table output is written entirely via the Python Delta Lake API; history table input is read via Python’s duckdb API. This is expected to make the job more reliable and faster than the existing CubicODSFact.