Validate that dbdata dir is of the correct PG version when starting.

[nbbaier]

I have a data directory that I initialized with initdb. When I try to run the example connecting to that data directory, the Promise returned by db.query(...) never resolves. Here's the code:

import { PGlite } from "@electric-sql/pglite";

const db = new PGlite("./pgdata");

await db.waitReady;

const result = await db.query("select 'Hello world' as message;");

console.log(result);

await db.close();

EDIT: I just realized that this is most likely because there is a difference in the version of postgres that created the dbs:

// created by installed initdb command on my machine
PostgreSQL 16.0 on aarch64-apple-darwin21.6.0, compiled by Apple clang version 14.0.0 (clang-1400.0.29.102), 64-bit

// created by pglite
PostgreSQL 15devel on aarch64-apple-darwin22.6.0, compiled by emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.25 (febd44b21ecaca86e2cb2a25ef3ed4a0a2076365), 32-bit

It would be nice to include an error for this type of thing. Are there plans for this to be resolved?

[samwillis]

Hey, yep, PGlite is using v15 and there is no compatibility between major pg versions data stores. We need to improve error handling in this situation.

thanks for the report.