darthunix/pgr

Lets call Rust from PostgreSQL

PGR

A playground for experiments with Rust inside PG extension.

How to install it?

cd pg
make install

How to use it?

create extension pgr;
select hello_rust();

This example calls a Rust function hello_world() inside PG that:

1. Creates a C compatible string with safe Rust.
2. Allocates a memory chunk using PostgreSQL allocator with unsafe Rust.
3. Copies the string from the Rust memory to the palloced one and attaches the pointer and some additional information to PgMemoryChunk structure.
4. Returns PgMemoryChunk (it has a C ABI) to PG function, retrieves data and prints the string.

We should not care about GC in Rust as its compiler automatically adds deallocations when the objects run out of the scope.