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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/token.ex
# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: 2025 DBVisor
defmodule SQL.Token do
@moduledoc false
@type token :: {atom, keyword, list}
@type tokens :: [{atom, keyword, list}]
@doc """
Returns a SQL string for a given token.
"""
@doc since: "0.2.0"
@doc deprecated: "Use SQL.Token.to_iodata/3 instead"
@callback token_to_string(tokens | token) :: String.t()
@doc """
Returns a SQL string for a given token.
"""
@doc since: "0.3.0"
@callback to_iodata(token :: {atom(), keyword(), list()}, context :: map(), indent :: non_neg_integer()) :: iodata()
defmacro __using__(opts) do
quote bind_quoted: [opts: opts] do
@doc false
@behaviour SQL.Token
def token_to_string(token), do: SQL.Adapters.ANSI.token_to_string(token, __MODULE__)
def to_iodata(token, context, indent), do: SQL.Adapters.ANSI.module.to_iodata(token, context, indent)
def to_iodata([], _context, _indent, acc), do: acc
def to_iodata([[]|tokens], context, indent, acc), do: to_iodata(tokens, context, indent, acc)
def to_iodata([token|tokens], context, indent, acc), do: to_iodata(tokens, context, indent, [acc|context.module.to_iodata(token, context, indent)])
def indention(indent, acc \\ [])
def indention(0, acc), do: acc
def indention(indent, acc), do: indention(indent-1, [?\s, ?\s|acc])
defoverridable token_to_string: 1, to_iodata: 3
end
end
end