Prisma migration not working with dolt

Discussed in https://github.com/prisma/prisma/discussions/15786

<div type='discussions-op-text'>

^{Originally posted by PavelSafronov October 14, 2022} Hi Prisma folks, Pavel with Dolthub here. Our product, dolt, provides a MySQL-like database, and one of our customers is experiencing issues while using Prisma+dolt, while the same migration works with Prisma+MySQL.

The error they are encountering is

Error: Error: unknown error: table not found: _prisma_migrations
   0: migration_core::state::DevDiagnostic
             at migration-engine/core/src/state.rs:251

But according to dolt DB logs, this error happens before Prisma queries the database for tables. Our current theory is that a different error is being originally thrown, and somehow causes the table not found error. But that’s just a theory.

Here is a repro repo that can illustrate the issue: https://github.com/PavelSafronov/prisma-dolt-debug I’ve included DB and Prisma logs for both the successful (MySQL) and the unsuccessful (dolt) runs.

We’re kind of stuck here:

• We’ve enabled Prisma logs, but those don’t appear to capture the engine internals. Is there a way to get engine logs?
• We’ve tried stepping through the Node.js code, but this in turns calls the Rust engine code, and I’m not sure how to step through that code. Is there a way to debug the Rust engine code during a migration?

Any advice you have will be really appreciated.</div>

[PavelSafronov]

I’m not sure about how long this will take us to fix, but I don’t think Prisma should be special-casing our error messages, that seems like a bad idea. It might be a good idea to avoid preparing a statement this early in the process, but Prisma may have very valid reasons for doing what it’s doing right now.

[PavelSafronov]

Hi @janpio , here are the answers to your questions:

• Obsidian db is just an empty database the test creates. It’s the name our customer used for the repro repo.
• Just tried db push with dolt, and that command succeeded. Curious.
• HostedDolt should work, but I’ve been testing this with just a local dolt installation, and that’s what the repro repo uses as well.