fix timeout

Author: greg-rychlewski

lib/ecto/adapters/myxql.ex

@@ -539,10 +539,10 @@ defmodule Ecto.Adapters.MyXQL do
     {args, cmd_opts}
   end
 
-  # Largely ported from Elixir System.cmd implementation
-  # with the intent of using file redirection for passing
-  # dump files into the mysql client so that users don't
-  # run into shell limits when dump files are large
+  # Ported from Elixir System.cmd implementation with the
+  # intent of using file redirection for passing dumps
+  # into the mysql client so that users don't run into
+  # shell limits when files are too large
   defp run_with_port(cmd, opts, opt_args, contents, cmd_opts \\ []) do
     unless System.find_executable(cmd) do
       raise "could not find executable `#{cmd}` in path, " <>
@@ -562,6 +562,7 @@ defmodule Ecto.Adapters.MyXQL do
     port_opts = port_opts(cmd_opts, args: args)
     port = Port.open({:spawn_executable, cmd}, port_opts)
     Port.command(port, contents)
+    Port.command(port, :eof)
 
     {initial, fun} = Collectable.into("")