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sergioschel

Member

From: Brazil

Registered: 2014-10-23

Posts: 9

Problem with timeout MySQL + ZEOS

Hello,
I am using the example 13 - StandAlone JSON SQL server, I changed the connection to use MySQL with ZEOS:

Props := TSQLDBZEOSConnectionProperties.Create('zdbc:mysql://localhost:3306/teste?username=root;password=root;MYSQL_OPT_RECONNECT=TRUE','teste', '', '');

The Process function of the standard return is UTF8 but after connection timeout of MySQL the process function returns AnsiString.

To test I put the MySQL server timeout 10 seconds.

Run SQL command that return with special character as select campo from teste

Return before timeout: [{"campo":"Está correto"}]

Return after timeout: [{"campo":"Está correto"}]

Please help

Last edited by sergioschel (2015-08-06 12:11:01)

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,242

Website

Re: Problem with timeout MySQL + ZEOS

What do you mean by "I put the MySQL server timeout" ?

I guess there should be an option to force an UTF-8 automatic reconnection via MYSQL_OPT_RECONNECT.

sergioschel

Member

From: Brazil

Registered: 2014-10-23

Posts: 9

Re: Problem with timeout MySQL + ZEOS

Hi ab,

Thanks for return,

how can i do it  in reconnecting?

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,242

Website

Re: Problem with timeout MySQL + ZEOS

I do not know.

You have to check the MySQL provider options, or perhaps ask in ZDBC forum.

Leslie7

Member

Registered: 2015-06-25

Posts: 248

Re: Problem with timeout MySQL + ZEOS

Avoiding loosing the connection is probably the next best thing after automatic reconnect.
Calling TZConnection.Ping  with a smaller than timeout frequency should be enough to practically keep the connection open.

http://dev.mysql.com/doc/refman/5.7/en/mysql-ping.html

I am not sure whether it should be MYSQL_OPT_RECONNECT=TRUE or MYSQL_OPT_RECONNECT=1.