Pastoid

 SELECT DISTINCT
	{posts}.id AS id,
	{posts}.slug AS slug,
	{posts}.title AS title,
	{posts}.guid AS guid,
	{posts}.content AS content,
	{posts}.cached_content AS cached_content,
	{posts}.user_id AS user_id,
	{posts}.STATUS AS STATUS,
	{posts}.pubdate AS pubdate,
	{posts}.updated AS updated,
	{posts}.modified AS modified,
	{posts}.content_type AS content_type
FROM
	{posts}
WHERE
	(
		id = ? AND (
			{posts}.user_id = :own_posts_id
		)
	)  
	OR
  	(
  		id = ? AND
  		user_id = ? AND
  		(
  			{posts}.user_id = :own_posts_id
  		)
  	)
ORDER BY
	pubdate DESC LIMIT 1