Slow MySQL Query When Run As A Procedure - mysql

Question

If I run this query directly in PHPMyAdmin, it returns 13420 rows in 0.2091 second, but if I run the exact same query as a stored procedure, it returns the same amount of row but it takes forever and sometimes the SQL server returns an out of memory exception.
I'm at a total loss - any advice would be welcome, because I can't work out why this slows everything down?!
SELECT
el.UID as LUID,
se.UID as DUID,
el.event_title,
el.event_synopsis,
se.behind_the_scenes,
se.sub_event_title,
se.event_eventDateAndTime,
se.event_eventDateAndTimeEnd,
el.event_confirmed,
el.event_active,
(
SELECT GROUP_CONCAT(sp2.color SEPARATOR ',')
FROM setup__spaces sp2
LEFT JOIN events__assigned_spaces eas2 ON ( eas2.space_id = sp2.UID )
LEFT JOIN events__events_list el2 ON (el2.UID = eas2.event_id)
WHERE el2.UID = el.UID
) as spaceColors,
(
SELECT GROUP_CONCAT(sp2.name SEPARATOR ', ')
FROM setup__spaces sp2
LEFT JOIN events__assigned_spaces eas2 ON ( eas2.space_id = sp2.UID )
LEFT JOIN events__events_list el2 ON (el2.UID = eas2.event_id)
WHERE el2.UID = el.UID
) as spaceNames,
(
SELECT GROUP_CONCAT(sp2.UID SEPARATOR ',')
FROM setup__spaces sp2
LEFT JOIN events__assigned_spaces eas2 ON ( eas2.space_id = sp2.UID )
LEFT JOIN events__events_list el2 ON (el2.UID = eas2.event_id)
WHERE el2.UID = el.UID
) as spaceIds,
(
SELECT GROUP_CONCAT(t.UID SEPARATOR ',')
FROM setup__tags t
LEFT JOIN events__assigned_tags eat ON ( eat.tag_id = t.UID )
LEFT JOIN events__events_list el2 ON (el2.UID = eat.event_id)
WHERE el2.UID = el.UID
) as tagIds,
(
SELECT GROUP_CONCAT(t.tag_name SEPARATOR ', ')
FROM setup__tags t
LEFT JOIN events__assigned_tags eat ON ( eat.tag_id = t.UID )
LEFT JOIN events__events_list el2 ON (el2.UID = eat.event_id)
WHERE el2.UID = el.UID
) as tagNames
FROM events__events_list el
INNER JOIN events__sub_events se ON (el.UID = se.event_masterEvent)
WHERE ((el.event_active='1') OR (el.event_active='0' AND el.event_confirmed = '1'))
AND el.company_uid = sp_company_uid

Answer 1

With thanks to #Akina for pointing me in the right direction, I found help from the following places:
stackoverflow.com - Selecting multiple columns/fields in MySQL subquery
geeksengine.com - How to use subquery in JOIN operation in MySQL
Here's the revised code that's now lightning fast!
SELECT
el.UID as LUID,
se.UID as DUID,
el.event_title,
el.event_synopsis,
se.behind_the_scenes,
se.sub_event_title,
se.event_eventDateAndTime,
se.event_eventDateAndTimeEnd,
el.event_confirmed,
el.event_active,
tags.names as tagNames,
tags.ids as tagIds,
spaces.names as spaceNames,
spaces.colors as spaceColors,
spaces.ids as spaceIds
FROM events__events_list el
INNER JOIN events__sub_events se ON (el.UID = se.event_masterEvent)
LEFT JOIN (
SELECT
el3.UID as el2uid,
GROUP_CONCAT(s.name SEPARATOR ', ') as names,
GROUP_CONCAT(s.color SEPARATOR ',') as colors,
GROUP_CONCAT(s.UID SEPARATOR ',') as ids
FROM setup__spaces as s
LEFT JOIN events__assigned_spaces eas ON ( eas.space_id = s.UID )
LEFT JOIN events__events_list el3 ON ( el3.UID = eas.event_id )
GROUP BY el3.UID
) as spaces on spaces.el2uid = el.UID
LEFT JOIN (
SELECT
el2.UID as el2uid,
GROUP_CONCAT(t.tag_name SEPARATOR ', ') as names,
GROUP_CONCAT(t.UID SEPARATOR ',') as ids
FROM setup__tags as t
LEFT JOIN events__assigned_tags eat ON ( eat.tag_id = t.UID )
LEFT JOIN events__events_list el2 ON ( el2.UID = eat.event_id )
GROUP BY el2.UID
) as tags on tags.el2uid = el.UID
WHERE ((el.event_active='1') OR (el.event_active='0' AND el.event_confirmed = '1'))
AND el.company_uid = sp_company_uid