update

phoenix/deps/ecto_sql/integration_test/support/repo.exs

@@ -0,0 +1,23 @@
+defmodule Ecto.Integration.Repo do
+  defmacro __using__(opts) do
+    quote do
+      use Ecto.Repo, unquote(opts)
+
+      @query_event __MODULE__
+                   |> Module.split()
+                   |> Enum.map(& &1 |> Macro.underscore() |> String.to_atom())
+                   |> Kernel.++([:query])
+
+      def init(_, opts) do
+        fun = &Ecto.Integration.Repo.handle_event/4
+        :telemetry.attach_many(__MODULE__, [[:custom], @query_event], fun, :ok)
+        {:ok, opts}
+      end
+    end
+  end
+
+  def handle_event(event, latency, metadata, _config) do
+    handler = Process.delete(:telemetry) || fn _, _, _ -> :ok end
+    handler.(event, latency, metadata)
+  end
+end