DBConnection.handle_begin
You're seeing just the callback
handle_begin
, go back to DBConnection module for more information.
Specs
handle_begin(opts :: Keyword.t(), state :: any()) :: {:ok, result(), new_state :: any()} | {status(), new_state :: any()} | {:disconnect, Exception.t(), new_state :: any()}
Handle the beginning of a transaction.
Return {:ok, result, state}
to continue, {status, state}
to notify caller
that the transaction can not begin due to the transaction status status
,
{:error, exception, state}
(deprecated) to error without beginning the
transaction, or {:disconnect, exception, state}
to error and disconnect.
A callback implementation should only return status
if it
can determine the database's transaction status without side effect.
This callback is called in the client process.