*De :*Vladislav Vaintroub [mailto:vvaintroub@xxxxxxxxx]
*Envoyé :* vendredi 31 mars 2017 14:44
*À :* jerome brauge; Diego Dupin
*Cc :* MariaDB Developers (maria-developers@xxxxxxxxxxxxxxxxxxx)
*Objet :* Re: [Maria-developers] bb-10.2-compatibility - processlist
On 31.03.2017 14:35, jerome brauge wrote:
Vladislav,
It’s weird to implement setClientInfo without provide a way to see
values (MySql Connector J only put values in a hashtable, I do not
know what it is for !)
On Oracle, Sybase, SQLServer and DB2, these values are pushed in
processes system view.
https://dev.mysql.com/doc/refman/5.6/en/session-connect-attrs-table.html
is actually something like that, and both MySQL and MariaDB drivers
support connectionAttributes in the connection URL, so maybe it is
something that you can use.
It is weird that these client connection attributes are tied to
performance schema, that can be switched off during runtime, or during
compilation. I'd rather have it in the information schema, that cannot
be switched off. Maybe it is something that we need to fix.
As much as possible, we want avoid to use one solution per database
vendor or a feature with a performance cost.
But I agree, it's boring if it’s implementation can change in future.
Thanks.
Regards
Jérôme.
*De :*Vladislav Vaintroub [mailto:vvaintroub@xxxxxxxxx]
*Envoyé :* vendredi 31 mars 2017 12:37
*À :* jerome brauge; bar@xxxxxxxxxxx <mailto:bar@xxxxxxxxxxx>
*Cc :* MariaDB Developers (maria-developers@xxxxxxxxxxxxxxxxxxx
<mailto:maria-developers@xxxxxxxxxxxxxxxxxxx>); Diego Dupin
*Objet :* Re: [Maria-developers] bb-10.2-compatibility - processlist
On 3/31/2017 12:16 PM, jerome brauge wrote:
Hi Vladislav,
As I understand is that this plugin allow user to see their own
session variables.
Here, we can see these information for each session (for
monitoring purpose, licensing control, …)
Is it correct ?
Yes, I think you're correct and I'm not .
I was chatting to Diego, our JDBC expert, he does not seem to recall
the reason session variables were used. I assume the implementation
can change without any notification.
MySQL Connector/J does not issue SET as I understand at the moment,
does not talk to DB at all.
But for monitoring purposes, there is something in performance schema
you might find useful
https://dev.mysql.com/doc/refman/5.6/en/session-connect-attrs-table.html
, most current drivers populate this table with similar information
to Appname, client user, client hostname
Regards,
Jérôme.
*De :*Vladislav Vaintroub [mailto:vvaintroub@xxxxxxxxx]
*Envoyé :* vendredi 31 mars 2017 12:06
*À :* jerome brauge; bar@xxxxxxxxxxx <mailto:bar@xxxxxxxxxxx>
*Cc :* MariaDB Developers (maria-developers@xxxxxxxxxxxxxxxxxxx
<mailto:maria-developers@xxxxxxxxxxxxxxxxxxx>)
*Objet :* Re: [Maria-developers] bb-10.2-compatibility - processlist
Hi Jerome, Bar
is user_variables plugin not enough for that ?
https://mariadb.com/kb/en/mariadb/information-schema-user_variables-table/
It is only one driver that sets these user variables, so it might not
be worth to extend processlist even more for general case, just for that.
On 3/31/2017 11:05 AM, jerome brauge wrote:
Hello Alexander,
Here is a patch to add information provided by JDBC
(setClientInfo) in information_schema.processlist
(ApplicationName, ClientUser, ClientHostname).
Do you think that it can be integrate ?
Regards,
Jérôme.
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