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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can also take a look at this repo: https://github.com/gabfl/bigquery_fdw/blob/main/src/bqclient.py if not for the FDW, then at least to the python bit that reads data, though I'm not sure how well it goes through large datasets.
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