+ global $db;
+ // are there MyISAM tables in the DB? If so, trigger a warning message
+ $r = q("SELECT `engine` FROM `information_schema`.`tables` WHERE `engine` = 'myisam' AND `table_schema` = '%s' LIMIT 1",
+ dbesc($db->database_name()));
+ $showwarning = false;
+ $warningtext = array();
+ if (dbm::is_result($r)) {
+ $showwarning = true;
+ $warningtext[] = sprintf(t('Your DB still runs with MyISAM tables. You should change the engine type to InnoDB. As Friendica will use InnoDB only features in the future, you should change this! See <a href="%s">here</a> for a guide that may be helpful converting the table engines. You may also use the <tt>convert_innodb.sql</tt> in the <tt>/util</tt> directory of your Friendica installation.<br />'), 'https://dev.mysql.com/doc/refman/5.7/en/converting-tables-to-innodb.html');
+ }
+ // MySQL >= 5.7.4 doesn't support the IGNORE keyword in ALTER TABLE statements
+ if ((version_compare($db->server_info(), '5.7.4') >= 0) AND
+ !(strpos($db->server_info(), 'MariaDB') !== false)) {
+ $warningtext[] = t('You are using a MySQL version which does not support all features that Friendica uses. You should consider switching to MariaDB.');
+ }