How To Solve Worpress wp_post2cat doesn’t exist Problems

December 17, 2007

After upgrading to Wordpress 2.3.1 I kept getting this rather perplexing and frustrating problem cropping up whenever I tried to post or modify my existing blog articles. If you have been facing problems regarding a ‘wp_post2cat doesn’t exist’ error right after trying to publish a post or when commenting, here is a quick solution to fix your woes.

The problem is simply a nuisance because all comments and posts are still published perfectly, but it certainly creates usability issues for your blog visitors. Here’s what it looked like so that other bloggers may find this tip of some assistance:

WordPress database error: [Table ‘wrdp1.wp_post2cat’ doesn’t exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM `wp_posts` p LEFT JOIN `wp_post2cat` pc ON p.ID = pc.post_id LEFT JOIN `wp_categories` c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_ID

Warning: Cannot modify header information - headers already sent by (output started at /public_html/wp-includes/wp-db.php:160) in
/public_html/wp-includes/pluggable.php on line 391

After looking through the aforementioned files and getting thoroughly confused, I realized that the Google Sitemaps plugin was the offending party. Simply disabling the Google Sitemaps plugin will fix this issue and get you started on trouble-free blogging again.

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