Allow subquery values in insert_all

lib/ecto/adapters/sqlite3/connection.ex

@@ -799,6 +799,9 @@ defmodule Ecto.Adapters.SQLite3.Connection do
         raise ArgumentError,
               "Cell-wise default values are not supported on INSERT statements by SQLite3"
 
+      {%Ecto.Query{} = query, params_counter}, counter ->
+        {[?(, all(query), ?)], counter + params_counter}
+
       _, counter ->
         # TODO: Should we have cell wise value support?
         #       Essentially ``?1 ?2 ?3`` instead of ``? ? ?``

test/ecto/integration/crud_test.exs

@@ -52,15 +52,20 @@ defmodule Ecto.Integration.CrudTest do
     end
 
     test "insert_all" do
+      TestRepo.insert!(%User{name: "John"}, [])
       timestamp = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
+      # doing this a weird way to test multiple query parameters
+      name_query =
+        from(u in User, where: u.name == ^"John" and ^true, select: u.name)
 
       account = %{
-        name: "John",
+        name: name_query,
         inserted_at: timestamp,
         updated_at: timestamp
       }
 
       {1, nil} = TestRepo.insert_all(Account, [account], [])
+      %{name: "John"} = TestRepo.one(Account)
     end
   end