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Database connection behaviour for database transactions and connection pooling
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lib/db_connection/query.ex
defprotocol DBConnection.Query do
@moduledoc """
The `DBConnection.Query` protocol is responsible for preparing and
encoding queries.
"""
@fallback_to_any true
@doc """
Parse a query.
This function is called to parse a query term before it is prepared using a
connection callback module.
See `DBConnection.prepare/3`.
"""
@spec parse(any, Keyword.t) :: any
def parse(query, opts)
@doc """
Describe a query.
This function is called to describe a query after it is prepared using a
connection callback module.
See `DBConnection.prepare/3`.
"""
@spec describe(any, Keyword.t) :: any
def describe(query, opts)
@doc """
Encodes a query.
This function is called to encode a query before it is executed using a
connection callback module.
See `DBConnection.execute/3`.
"""
@spec encode(any, Keyword.t) :: any
def encode(query, opts)
end
defimpl DBConnection.Query, for: Any do
def parse(query, _), do: query
def describe(query, _), do: query
def encode(query, _), do: query
end