|> (&Ecto.Adapter.Queryable.plan_query(:all, Ecto.Adapters.Postgres, &1)).() |> elem(0) 

Ecto.Adapters.SQL.to_sql(:all, Repo, query)

defmodule MyQueries do
  import Ecto.Query
  alias Ecto.Adapters.Queryable
  alias MyLib.Repo

  def my_query do
    from l in "left",
    left_join: r in "right", on: r.id == l.r_id,
    select: {l.id, r:id}
  end
  
  def inspect(query) do
    Queryable.plan_query(query)
  end
  
  def execute(%Ecto.Query{} = query) do
    Repo.all(query)
  end
  def execute({query, _}) do
    Ecto.Adapters.Postgres.Connection.all(query)
  end
end