When it comes to Postgres extensions for columnar storage, I like how Citus [1] handles the more general problem of columnar tables instead of focusing just on "hypertables" which necessarily must have a time column as primary key.
This works fine when you have partitioned tables over time, and the current partition is row-oriented, while the historic read-only partitions are columnar.
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[ 0.18 ms ] story [ 17.4 ms ] thread[1] https://github.com/citusdata/citus?tab=readme-ov-file#creati...
“Update, delete, and foreign keys are currently unsupported on columnar tables. “