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SQL provides state-of-the-art, high-performance SQL integration for Elixir, built to handle extreme concurrency with unmatched expressiveness and ergonomic query composition. Write safe, composable, parameterized queries directly, without translating to Ecto or any ORM.
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lib/application.ex
# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: 2025 DBVisor
defmodule SQL.Application do
@moduledoc false
import SQL
def start(_type, _args) do
pools = Application.get_env(:sql, :pools, [])
children = for {name, opts} <- pools do
{SQL.Pool, Map.put(Map.new(opts), :name, name)}
end
result = {:ok, _sup} = Supervisor.start_link(children, strategy: :one_for_one)
for {name, opts} <- pools do
pid = Process.whereis(name)
children = Supervisor.which_children(pid)
pids = Enum.reverse(Enum.map(children, fn {_id, pid, _type, _mod} -> pid end))
:persistent_term.put(name, List.to_tuple(pids))
config = {name, Map.new(opts)}
SQL.begin(:transaction, name)
oids = Mix.Tasks.Sql.Get.oids(config)
get = Mix.Tasks.Sql.Get.get(config)
SQL.commit(:transaction)
:persistent_term.put({name, :oids}, oids)
:persistent_term.put({name, :columns}, get)
end
result
end
end