错误＃1250 - 其中一个SELECT的表'x'不能在全局ORDER子句中使用

Question

我通过优化器运行了这个查询。

SELECT *, chv_images.image_id FROM chv_images
LEFT JOIN chv_storages ON chv_images.image_storage_id = chv_storages.storage_id
LEFT JOIN chv_users ON chv_images.image_user_id = chv_users.user_id
LEFT JOIN chv_albums ON chv_images.image_album_id = chv_albums.album_id
LEFT JOIN chv_categories ON chv_images.image_category_id = chv_categories.category_id
LEFT JOIN chv_meta ON chv_images.image_id = chv_meta.image_id
WHERE chv_images.image_nsfw = 0 AND (chv_albums.album_privacy NOT IN ('private','private_but_link','custom') OR chv_albums.album_privacy IS NULL OR chv_albums.album_user_id IS NULL)
ORDER BY chv_images.image_id DESC
LIMIT 0,15

它看起来像这样，理论上从我理解的方面肯定更好。

(
        SELECT
            *,
            chv_images.image_id 
        FROM
            chv_images 
        LEFT JOIN
            chv_albums 
                ON chv_images.image_album_id = chv_albums.album_id 
        WHERE
            chv_images.image_nsfw = 0 
            AND (
                chv_albums.album_user_id IS NULL
            ) 
        ORDER BY
            chv_images.image_id DESC LIMIT 0,
            15
    ) 
UNION
DISTINCT (SELECT
    *,
    chv_images.image_id 
FROM
    chv_images 
LEFT JOIN
    chv_albums 
        ON chv_images.image_album_id = chv_albums.album_id 
WHERE
    chv_images.image_nsfw = 0 
    AND (chv_albums.album_privacy NOT IN ('private', 'private_but_link', 'custom') 
    OR chv_albums.album_privacy IS NULL) 
ORDER BY
    chv_images.image_id DESC LIMIT 0,
    15) 
ORDER BY
chv_images.image_id DESC LIMIT 0,
15

但是有一个问题。错误＃1250 - 来自其中一个SELECT的表'chv_images'不能在全局ORDER子句中使用。

我尝试删除一些括号但是没有用。