Search operation, the total_count that is taken is not in conformity with the actual

[wgclk]

To do query operation, the value of total_count is not the expected result.
The following is the IEX operation：

iex(4)rummage = %{
...(4)>       search: %{name:  %{search_type: :like, search_term: "c"}},
...(4)>       sort: %{field: :name, order: :asc},
...(4)>       paginate: %{page: 1}
...(4)>     }
%{paginate: %{page: 1},
search: %{name: %{search_term: "c", search_type: :like}},
sort: %{field: :name, order: :asc}}

iex(5)> {queryable, rummage} = ZergApi.Base.Exchange.rummage(rummage)
[debug] QUERY OK source="exchanges" db=0.1ms
SELECT count(DISTINCT e0.`id`) FROM `exchanges` AS e0 []
{#Ecto.Query<from e in subquery(from e in subquery(from e in ZergApi.Base.Exchange),
where: like(e.name, ^"%c%")),
order_by: [asc: e.name], limit: ^10, offset: ^0>,
%{paginate: %{max_page: 1, page: 1, per_page: 10, total_count: 10},
 search: %{name: %{assoc: [], search_expr: :where, search_term: "c",
     search_type: :like}},
 sort: %{assoc: [], field: :name, order: :asc}}}

To do query operation, the value of total_countde is not the expected result.
The following is the IEX operation
There are ten pieces of data in this table. After the search operation, three data should be returned, that is, total_count=3, and the actually returned total_count =10, and the following is the actual data.
and the following is the actual data

iex(6)> exchanges = queryable |> ZergApi.Repo.all
[debug] QUERY OK db=0.4ms
SELECT s0.`id`, s0.`name`, s0.`cn_name`, s0.`home_page`, s0.`timezone`, s0.`inserted_at`, s0.`updated_at` FROM (SELECT s0.`id` AS `id`, s0.`name` AS `name`, s0.`cn_name` AS `cn_name`, s0.`home_page` AS `home_page`, s0.`timezone` AS `timezone`, s0.`inserted_at` AS `inserted_at`, s0.`updated_at` AS `updated_at` FROM (SELECT e0.`id` AS `id`, e0.`name` AS `name`, e0.`cn_name` AS `cn_name`, e0.`home_page` AS `home_page`, e0.`timezone` AS `timezone`, e0.`inserted_at` AS `inserted_at`, e0.`updated_at` AS `updated_at` FROM `exchanges` AS e0) AS s0 WHERE (s0.`name` LIKE ?)) AS s0 ORDER BY s0.`name` LIMIT ? OFFSET ? ["%c%", 10, 0]
[%ZergApi.Base.Exchange{__meta__: #Ecto.Schema.Metadata<:loaded, "exchanges">,
  cn_name: "", home_page: "", id: 5,
  inserted_at: ~N[2018-04-10 14:02:17.000000], name: "",
  products: #Ecto.Association.NotLoaded<association :products is not loaded>,
  timezone: "Asia/Shanghai", updated_at: ~N[2018-04-10 14:02:17.000000]},
 %ZergApi.Base.Exchange{__meta__: #Ecto.Schema.Metadata<:loaded, "exchanges">,
  cn_name: "", home_page: "", id: 6,
  inserted_at: ~N[2018-04-10 14:02:17.000000], name: "",
  products: #Ecto.Association.NotLoaded<association :products is not loaded>,
  timezone: "Asia/Shanghai", updated_at: ~N[2018-04-10 14:02:17.000000]},
 %ZergApi.Base.Exchange{__meta__: #Ecto.Schema.Metadata<:loaded, "exchanges">,
  cn_name: "", home_page: "", id: 4,
  inserted_at: ~N[2018-04-10 14:02:17.000000], name: "",
  products: #Ecto.Association.NotLoaded<association :products is not loaded>,
  timezone: "Asia/Shanghai", updated_at: ~N[2018-04-10 14:02:17.000000]}]

Can you tell me how to solve this problem？