The hosting company swears that they didn’t change anything in MySQL, but it got fixed. I looked in the error log and saw tons of errors, for example:
WordPress database error Got error 28 from storage engine for query SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘link_category’) AND tt.count > 0 ORDER BY t.name ASC made by require, require_once, include, get_footer, locate_template, load_template, require_once, woo_footer_top, woo_do_atomic, do_action, call_user_func_array, woo_footer_sidebars, woo_sidebar, dynamic_sidebar, call_user_func_array, WidgetCache->widget_cache_redirected_callback, call_user_func_array, WP_Widget->display_callback, WP_Widget_Links->widget, wp_list_bookmarks, get_terms
and I also saw a bunch of these:
WordPress database error Duplicate column name ‘comment_subscribe_optin_mailed’ for query ALTER TABLE wp_comments ADD COLUMN comment_subscribe_optin_mailed enum(‘Y’,’N’) NOT NULL default ‘N’ made by require, require_once, do_action, call_user_func_array, lcp_output_js, include, comment_form, do_action, call_user_func_array, show_subscription_checkbox, sg_subscribe_start, sg_subscribe->sg_subscribe, sg_subscribe->db_upgrade_check
Yes, I have backups. The problem went away, however, without my doing anything.
Hi, I’m having the same problem – categories and tags have disappeared for no reason…but they won’t come back.
As above, the Admin interface for Categories says “96” entries, but the list has “no items found.” Also, my “Most Used” categories list still exists, but is seemingly useless.
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