PRQL Postgres Reverse Proxy
PRQL is a modern SQL replacement.
This proxy sits in front of a Postgres instance and intercepts queries: queries that are prefixed by prql: are
treated as PRQL instead of SQL: they are converted to SQL on the fly by the proxy, and the generated SQL is sent
to the server for processing. If the PRQL conversion fails, errors are returned as PSQL errors.
Usage
prqlproxy --server <SERVER> --address <ADDRESS>
Options:
-s, --server <SERVER> Address:port of the PostgreSQL database server to proxy
-a, --address <ADDRESS> Address:port of the listening proxy
-h, --help Print help
-V, --version Print version
Example
Start the proxy prqlproxy -s localhost:5432 -a localhost:6142
Connect from psql:
psql -h localhost -p 6142 -d pagila -U postgres
Password for user postgres:
psql (14.7 (Homebrew))
Type "help" for help.
pagila=# prql: from customer
pagila-# select [first_name, last_name]
pagila-# take 1..20;
first_name | last_name
------------+-----------
MARY | SMITH
PATRICIA | JOHNSON
LINDA | WILLIAMS
BARBARA | JONES
ELIZABETH | BROWN
JENNIFER | DAVIS
MARIA | MILLER
SUSAN | WILSON
MARGARET | MOORE
DOROTHY | TAYLOR
LISA | ANDERSON
NANCY | THOMAS
KAREN | JACKSON
BETTY | WHITE
HELEN | HARRIS
SANDRA | MARTIN
DONNA | THOMPSON
CAROL | GARCIA
RUTH | MARTINEZ
SHARON | ROBINSON
(20 rows)
pagila=# prql: I don't know what I'm doing;
ERROR: Unknown name `I`
Development
It's a very basic reverse proxy built in Rust with Tokio and the PRQL Rust library.
SSL is not supported.