WordPress database error: [Key 'type_status_date' doesn't exist in table 'wp_posts']
SELECT `post_modified_gmt` FROM ( SELECT @rownum:=0 ) init JOIN `wp_posts` USE INDEX( `type_status_date` ) WHERE `post_status` IN ('publish') AND `post_type` = 'post' AND ( @rownum:=@rownum+1 ) % 1000 = 0 ORDER BY `post_modified_gmt` ASC