bug#25628: 26.0.50; [PATCH] sql-mode w/ sqlite: In-memory database

[npostavs]

> From: Rolf Ade <rolf@pointsman.de>
> Date: Sun, 5 Feb 2017 19:46:24 +0100
> Subject: [PATCH] sql-mode w/ sqlite: In-memory database
>
> Enable the usage of an in-memory database. Prior to this, sql-mode w/
> sqlite could only be used with file databases.
> * list/progmodes/sql.el (sql-get-login-ext): Don't expand an empty
> file name provided by the user, but call sub-process sqlite with that,
> in which case it use an in-memory database.

Could this potentially cause problems for users of a non-sqlite
database?