update

phoenix/deps/ecto_sql/lib/ecto/adapters/sql/stream.ex

@@ -0,0 +1,43 @@
+defmodule Ecto.Adapters.SQL.Stream do
+  @moduledoc false
+
+  defstruct [:meta, :statement, :params, :opts]
+
+  def build(meta, statement, params, opts) do
+    %__MODULE__{meta: meta, statement: statement, params: params, opts: opts}
+  end
+end
+
+alias Ecto.Adapters.SQL.Stream
+
+defimpl Enumerable, for: Stream do
+  def count(_), do: {:error, __MODULE__}
+
+  def member?(_, _), do: {:error, __MODULE__}
+
+  def slice(_), do: {:error, __MODULE__}
+
+  def reduce(stream, acc, fun) do
+    %Stream{meta: meta, statement: statement, params: params, opts: opts} = stream
+    Ecto.Adapters.SQL.reduce(meta, statement, params, opts, acc, fun)
+  end
+end
+
+defimpl Collectable, for: Stream do
+  def into(stream) do
+    %Stream{meta: meta, statement: statement, params: params, opts: opts} = stream
+    {state, fun} = Ecto.Adapters.SQL.into(meta, statement, params, opts)
+    {state, make_into(fun, stream)}
+  end
+
+  defp make_into(fun, stream) do
+    fn
+      state, :done ->
+        fun.(state, :done)
+        stream
+
+      state, acc ->
+        fun.(state, acc)
+    end
+  end
+end