Did you try it?
It’s documented here: ecto_sql/lib/ecto/adapters/sql.ex at 2ec71d74655cc076b6c965740a357dfe1505883a · elixir-ecto/ecto_sql · GitHub and here’s the macro, which adds it to the repo: ecto_sql/lib/ecto/adapters/sql.ex at 2ec71d74655cc076b6c965740a357dfe1505883a · elixir-ecto/ecto_sql · GitHub
It’s not part of the Ecto.Repo behaviour though, which is why it’s not documented in that module. It’s only available if you’re using a SQL based adapter.
