Geekality » MySql http://www.geekality.net With a hint of Social Ineptitude Tue, 27 Jul 2010 16:15:56 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 How to delete WordPress post revisions http://www.geekality.net/2009/10/20/how-to-delete-wordpress-post-revisions/ http://www.geekality.net/2009/10/20/how-to-delete-wordpress-post-revisions/#comments Tue, 20 Oct 2009 21:40:23 +0000 Torleif http://www.geekality.net/?p=689 Continue reading →]]> Having revisions on my posts is nice I suppose. But I was starting to get a bit annoyed with the increasingly long list of revisions in each post. And they really did get long. Mainly because I am in a bit of a testing and experimenting phase which means that I have done a lost of adjustments to almost every single post so far because I don’t have 100% control on how I want things or how things will end up looking and so on :P

Anyways, I found a nice little MySQL snippet to clear out all of them in a French comment to a blog post. Thought I could share it here. Especially since I then know where to find it and it won’t disappear on me.

DELETE x,y,z
FROM wp_63nbis_posts x
LEFT JOIN wp_63nbis_term_relationships y ON (x.id = y.object_id)
LEFT JOIN wp_63nbis_postmeta z ON (x.id = z.post_id)
WHERE x.post_type = 'revision'

I did a select first (just swap delete x,y,z with select *) to check that it would delete what it was actually supposed to. And then a delete inside a transaction with another select afterwards, just in case :P (All of which are very easy to do in MySQL Query Browser)

By the way, in the comments to that mentioned blog post there are also mentioned some other solutions to this problem. For example:

  • Adding define('WP_POST_REVISIONS', N); to your wp-config.php file, where N would be the maximum number of revisions you want to allow, or -1 if you want them all.
  • Add a plugin to WordPress called revision delete!.
]]> http://www.geekality.net/2009/10/20/how-to-delete-wordpress-post-revisions/feed/ 0 How to reset the MySql root account http://www.geekality.net/2008/12/27/how-to-reset-the-mysql-root-account/ http://www.geekality.net/2008/12/27/how-to-reset-the-mysql-root-account/#comments Sat, 27 Dec 2008 16:38:24 +0000 Torleif http://www.geekality.net/?p=55 Continue reading →]]> I just managed to mess up the MySQL root account. Not a smart idea. After some MySQL manual reading and some serious Google-Fu, I figured out how to fix it.

  1. Stop the mysql server
  2. Add the following to the my.cnf file
    [mysqld]
    skip-grant-tables
  3. Start the mysql server
  4. Start a mysql client and run the following query
    REPLACE INTO mysql.user VALUES ('localhost','root',PASSWORD('blah'),'Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0);
  5. Quit the mysql client
  6. Stop the mysql server
  7. Remove what we added to my.cnf in step 2
  8. Restart the mysql server

Tadaa.

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