diesel_migrations fails when search_path is set in migration script

Setup

Any migration script similar to the following up.sql

SET search_path='foo';

--alternatively you could use:
--SELECT pg_catalog.set_config('search_path', '', false);

Versions

• Rust: 1.90
• Diesel:

diesel = { version = "2.2.0", features = ["postgres"] }
diesel_migrations = { version = "2.2.0", features = ["postgres"] }

• Database: postgres
• Operating System linux

Feature Flags

• diesel: postgres
• diesel_migrations: postgres

Problem Description

diesel_migrations fails when search_path is set in migration script

What are you trying to accomplish?

Perform a migration where the search_path is set

This allows using shortened names for things like types

What is the expected output?

$ diesel migration run
Running migration 2025-08-27-111711_initial
$

What is the actual output?

$ diesel migration run
Running migration 2025-08-27-111711_initial
2025-08-27T18:52:00.647148Z ERROR diesel::database: Failed to execute query query=Query { sql: "INSERT INTO \"__diesel_schema_migrations\" (\"version\") VALUES ($1)", binds: [] } err=DatabaseError(Unknown, "relation \"__diesel_schema_migrations\" does not exist")
Failed to run migrations: relation "__diesel_schema_migrations" does not exist
$

Are you seeing any additional errors?

n/a

Steps to reproduce

• create a migration script containing SET search_path='foo' or similar
• run migration script with diesel migration run or any other method (eg. programmatically is expected to perform similarly to CLI)

Checklist

• I have already looked over the issue tracker and the discussion forum for similar possible closed issues.
• This issue can be reproduced on Rust's stable channel. (Your issue will be closed if this is not the case)
• This issue can be reproduced without requiring a third party crate