…in FROM clause.” We can’t DELETE and SELECT from the same table in a single query in MySQL. But we can use MySQL…length+1 FROM TreePaths AS supertree JOIN TreePaths AS subtree WHERE subtree.ancestor =…cross over that boundary. Everything else takes care of itself. I also wrote about Closure Table in…
Post: Thank you for joining us at Percona Live, NYC 2012
October 7, 2012 By 1 Comment
… Suite solution for deploying and managing MySQL in the Cloud. MariaDB have showcased …to dramatically increase performance of complicated join queries. MySQL users are always hungry for…cross database replication. It feature set beats MySQL 5.6 but as Robert Hodges puts it , “it works with MySQL…
Post: The Doom of Multiple Storage Engines
May 8, 2010 By 22 Comments
…engines may have and if we venture into using cross storage engine transactions we’re up for a … really this is not enough as MySQL allows you using multiple storage engines in the query you need to test all kinds of combination such as running multi-table update joining …
Post: SQL Injection Questions Followup
July 26, 2012 By 2 Comments
… $placeholders = join(“,”, array_fill(0, count($params), “?”)); $sql = “SELECT * FROM Bugs WHERE bug_id IN ($placeholders)”; $stmt…do this in SQL expressions instead of in application code. See http://dev.mysql.com/doc/refman…here: https://www.owasp.org/index.php/Cross_Site_Scripting_Flaw I’d like …
Post: Packing for company meeting in Egypt
November 29, 2007 By 5 Comments
… on Friday and returning back in a week. Similary to early MySQL practice we have invited … out their Passport issues in time or simply joined us too late in trip organization process. Why Egypt… on it when expected and now keep fingers crossed hoping Flight, Accommodation, Internet, Weather will all …
Comment: Finding your MySQL High-Availability solution – The questions
October 19, 2009 By 36 Comments
…sharding. You have probably tune your schema in a way to reduce cross-node interactions. How do you manage things… you use SSL between your application servers and your MySQL servers? 2.9 Good point and yes, this …might help but there are ways to improve the joins. If I find some time, I’ll backport …
Comment: Why MySQL's binlog-do-db option is dangerous
May 14, 2009 By 15 Comments
…-options-slave.html#option_mysqld_replicate-do-table http://dev.mysql.com/doc/refman/5.0/en/replication-options-slave.html… cross-database updates, in contrast to –replicate-ignore-db.” But you still need to be aware of it’s quirks, queries that JOIN the wrong tables in updates could leave your replication out of sync.
