I asked the wrong question so I will try again (sorry). You don't have to read the query in details, but just to give you an idea.
Anyway: the query in question is this, generated by Doctrine2 (I cut SELECT part)
FROM
tbl_story t0_
LEFT JOIN tbl_user t1_ ON t0_.creator_id = t1_.id
LEFT JOIN tbl_image t2_ ON t1_.avatar_id = t2_.id
LEFT JOIN tbl_image t3_ ON t0_.id = t3_.story_id
LEFT JOIN tbl_like t4_ ON t0_.id = t4_.story_id AND (t4_.creator_id = 3)
LEFT JOIN tbl_comment t5_ ON t0_.id = t5_.story_id
LEFT JOIN tbl_like t6_ ON t5_.id = t6_.comment_id AND (t6_.creator_id = 3)
LEFT JOIN tbl_user t7_ ON t5_.creator_id = t7_.id
LEFT JOIN tbl_image t8_ ON t7_.avatar_id = t8_.id
LEFT JOIN tbl_location_city t9_ ON t0_.city_id = t9_.id
LEFT JOIN tbl_location_state t10_ ON t9_.state_id = t10_.id
LEFT JOIN tbl_location_country t11_ ON t10_.country_id = t11_.id
LEFT JOIN tbl_story t12_ ON t0_.parent_id = t12_.id
LEFT JOIN tbl_page t13_ ON t0_.page_id = t13_.id
LEFT JOIN tbl_page_type t14_ ON t13_.page_type_id = t14_.id
LEFT JOIN tbl_story_tag t25_ ON t0_.id = t25_.story_id
LEFT JOIN tbl_tag t15_ ON t15_.id = t25_.tag_id
LEFT JOIN tbl_story_linked_user_reference t16_ ON t0_.id = t16_.story_id
LEFT JOIN tbl_user t17_ ON t16_.user_id = t17_.id
LEFT JOIN tbl_image t18_ ON t17_.avatar_id = t18_.id
LEFT JOIN tbl_story t19_ ON t0_.id = t19_.parent_id
LEFT JOIN tbl_album t20_ ON t0_.parent_album_id = t20_.id
LEFT JOIN tbl_image t21_ ON t20_.id = t21_.album_id
LEFT JOIN tbl_image_linked_user t22_ ON t21_.id = t22_.image_id
LEFT JOIN tbl_user t23_ ON t22_.user_id = t23_.id
LEFT JOIN tbl_image t24_ ON t23_.avatar_id = t24_.id
WHERE (
t0_.creator_id = 3
OR t0_.id IN
(SELECT
t26_.id
FROM tbl_story t26_
INNER JOIN tbl_story_circle_visibility t28_ ON t26_.id = t28_.story_id
INNER JOIN tbl_circle t27_ ON t27_.id = t28_.circle_id
INNER JOIN tbl_user_circle_reference t29_ ON t27_.id = t29_.circle_id
AND (t29_.user_id = 3))
OR t0_.is_public = 1
)
AND t0_.is_draft = 0
AND t0_.type IN (0, 3, 2, 21)
ORDER BY t0_.created_at DESC
LIMIT 7
The problem:
with ORDER BY, query takes 1.2 seconds to execute when there are only 31.000 rows in tbl_story (main query). If I remove ORDER BY, it is executed in 6ms, I guess all these joins take extra time but still nothing to worry.
I first thought ORDER BY is slow but I was wrong. I tried
SELECT * FROM `tbl_story` ORDER BY created_at DESC LIMIT 7
(same thing but without joins) and it is executed in 2ms.
I read other questions too including this one that suggests removing JOIN parts. That might work if I this was possible in Doctrine2:
$queryBuilder->select("o.id")->removeLeftJoins()
and after I fetch ID's, use them in clone of original query.
How can I solver the problem of pagination?
NOTE:
Even if I completelly remove WHERE clause, the query takes same 1.2 secs so it is not the one giving problems.
Thanks.
