MySQL CASE LEFT JOINS returning NULL - mysql

Question

I have a query with a CASE statement that determines the variable object_name this variable is derived from either the x_ambitions table or the x_trybes table. The queries below were combined so that I could keep it simple by just executing one SQL query.
I've split the SELECT statement into two so that you have a better understanding. The two queries below. Work and pull the correct object_name from the database.
The problem I'm having when I combine the two queries is that the cases 'new_join_ambition','new_created_ambition','new_liked_ambition' object_name returns NULL in the LEFT JOIN.
In the combined query, If I bring the cases: 'new_join_ambition','new_created_ambition','new_liked_ambition' above the 'new_join_trybe','new_created_trybe','new_liked_trybe' cases. The opposite happens. The trybe rows return NULL.
The two SQL queries:
A: (Retrieve Object A)
SELECT
s.id,
s.object_id,
s.type,
s.postee_id,
s.user_id,
s.text,
s.registered,
CONCAT(u.x_first_name,' ',u.x_last_name) AS postee_name,
ui.image_id AS postee_image_id,
CASE s.type
WHEN 'new_join_ambition'
OR 'new_created_ambition'
OR 'new_liked_ambition'
THEN a.name
ELSE 'a'
END AS object_name
FROM
x_share s
LEFT JOIN
x_user u ON u.id = s.postee_id
LEFT JOIN
x_user_images ui ON ui.user_id = s.postee_id
LEFT JOIN
x_ambitions a ON s.type IN ('new_join_ambition', 'new_created_ambition', 'new_liked_ambition') AND s.object_id = a.id
LEFT JOIN
x_ambition_invites ai ON s.type IN ('new_join_ambition') AND s.object_id = ai.ambition_id AND s.postee_id = ai.to
LEFT JOIN
x_ambition_likes al ON s.type IN ('new_liked_ambition') AND s.object_id = al.ambition_id AND s.postee_id = al.profile_id
LEFT JOIN
x_ambition_owner aoo ON s.type IN ('new_created_ambition') AND s.object_id = aoo.ambition_id
WHERE
s.user_id = '%s'
ORDER BY
s.registered DESC
B: (Retrieve Object B)
SELECT
s.id,
s.object_id,
s.type,
s.postee_id,
s.user_id,
s.text,
s.registered,
CONCAT(u.x_first_name,' ',u.x_last_name) AS postee_name,
ui.image_id AS postee_image_id,
CASE s.type
WHEN 'new_join_trybe'
OR 'new_created_trybe'
OR 'new_liked_trybe'
THEN t.name
ELSE 'a'
END AS object_name
FROM
x_share s
LEFT JOIN
x_user u ON u.id = s.postee_id
LEFT JOIN
x_user_images ui ON ui.user_id = s.postee_id
LEFT JOIN
x_trybes t ON s.type IN ('new_join_trybe', 'new_created_trybe', 'new_liked_trybe') AND s.object_id = t.id
LEFT JOIN
x_trybe_invites ti ON s.type IN ('new_join_trybe') AND s.object_id = ti.trybe_id AND s.postee_id = ti.to
LEFT JOIN
x_trybes_likes tl ON s.type IN ('new_liked_trybe') AND s.object_id = tl.trybe_id AND s.postee_id = tl.profile_id
LEFT JOIN
x_trybe_owner too ON s.type IN ('new_created_trybe') AND s.object_id = too.trybe_id
WHERE
s.user_id = '%s'
ORDER BY
s.registered DESC
I've ran both the queries and have captured images of the results of both queries.
Set A:
Set B:
How can I combine the two without the object_name returning NULL? If you have any questions please use the comments and I'll reply without hesitation.
Thanks in advance

Answer 1

I don't know about the rest of your query, but your case statement is incorrect. You have:
(CASE s.type
WHEN 'new_join_ambition' OR 'new_created_ambition' OR 'new_liked_ambition'
THEN a.name
ELSE 'a'
END) AS object_name
The ORs end up treating the values as numbers, so this is equivalent to WHEN 0 THEN . . ..
What you want is this form of the case:
(CASE WHEN s.type IN ('new_join_ambition', 'new_created_ambition', 'new_liked_ambition')
THEN a.name
ELSE 'a'
END) AS object_name