Re: [Lazarus] Multiple versions of MySQL/MariaDB
Is it possible to detect which version of MySQL/MariaDB is used , and according to the result select the right connection, at run-time ? Trial and error: Loop over the connection component until you find one that doesn't raise exception when activated. Simple, but takes more resource. Querying the tool: Executes `mysql --version` and parse the result. Apparently the output is consistent enough between versions, it's always the fifth column. More complicated logic, but lower resource usage. Let the user decide: Provide a config file and let user fill it. Just connect anyway to whatever value supplied by user, certainly you can limit to certain accepted values only. This lifts the responsibility to user to supply the correct version. -- View this message in context: http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Multiple-versions-of-MySQL-MariaDB-tp4043756p4043757.html Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Multiple versions of MySQL/MariaDB
On Fri, 28 Aug 2015, Koenraad Lelong wrote: Hi, What defines the TMySQL-connection-version ? Are those the installed libraries on the client ? Or is it the server ? Is it possible to detect which version of MySQL/MariaDB is used , and according to the result select the right connection, at run-time ? Load the mysql library manually and check the version returned by function mysql_get_client_version:culong; By far the easiest, I would imagine ? Michael. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Multiple versions of MySQL/MariaDB
Hi, What defines the TMySQL-connection-version ? Are those the installed libraries on the client ? Or is it the server ? Is it possible to detect which version of MySQL/MariaDB is used , and according to the result select the right connection, at run-time ? The problem is that my development-PC does not neccessarily have the same libraties as the user-PC. FWIW, I'm running linux on the development-PC. Regards, Koenraad. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
