PG wire protocol notes: https://www.npgsql.org/doc/dev/type-representations.html?q=wire
Parquet Repetition/Definition Levels: https://blog.twitter.com/engineering/en_us/a/2013/dremel-made-simple-with-parquet
https://crates.io/crates/pg_bigdecimal
multi-dim array https://docs.rs/postgres_array/latest/postgres_array/struct.Array.html