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emacsql-mysql - best way to close connection?

From: Guido Van Hoecke
Subject: emacsql-mysql - best way to close connection?
Date: Sat, 01 Apr 2017 09:14:06 +0200


I create a mysql connection in a let* form:

(let* ((host "")
       (dummy (netrc-credentials host)) ;; needed to define remaining netrc 
       (info (netrc-machine (netrc-parse (expand-file-name "~/.netrc")) host))
       (id (cdr (assoc "login" info)))
       (pw (cdr (assoc "password" info)))
       (db (emacsql-mysql "database" :user id :password pw :host host)))

Somehow I hoped that the connection would go away when the let* form
finishes but the connection does survive. The documentation at
[[][EmacSQL]] does mention: 'It works
by maintaining a inferior process running (a "connection") for
interacting with the back-end database. Connections are automatically
cleaned up if they are garbage collected. All requests are synchronous.'

Each time the form is executed, a new connection is created. Typically
this happens once a day, but by the end of the week it accumulates 7
open connections :(

There's probably a better way to create and close connections, but up to
now I have not been able to find relevant documentation.

Please advise.



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