Walcaino
Messing around with Broadway and Cainophile.
With this application running, run:
{:ok, pid} = Postgrex.start_link(database: "caino")
q = "insert into survey_views (shop_id, question_id) values ('abc123', 9);"
for _ <- 0..51_000, do: Postgrex.query!(pid, q, []); :ok
and parquet files will be written to local disk.
The next step would be to write the parquet to S3.