私が欲しいのは、1 つのイベントの参加者 (参加者の役割を持つ人々) と、参加者と同じ会社のマネージャーの役割を持つ人々を組み合わせたものです。
個人の役割は person_role_membership に保存されますが、個人の会社は People に保存されます。次のクエリを作成しましたが、これはかなりうまく機能すると思います。余分な結合と情報は無視してください。すべての参加者をフェッチしてから、すべてのマネージャーと UNION を実行します。そのために、もう一度すべての参加者をフェッチします。ここで問題になるのは、このクエリ全体です。小さなサブセットに 9 秒かかるためです。速くする方法はありますか?
select distinct *
from
(
SELECT
p.id as p_id, p.first_name as p_first_name, p.last_name as p_last_name,p_r.name as p_role,
p.job_title as p_job_title,
p_d.email as p_email, p_d.phone_1 as p_phone, p_d.phone_ext_1 as p_ext,
c.name as p_company, p_c.name as p_parent_company
FROM person_role_memberships as prm
left join people as p on prm.person_id = p.id and prm.person_role_id between 32 and 35
left join person_roles as p_r on p_r.id = prm.person_role_id
left join person_details as p_d on p.id = p_d.person_id and p_d.type = 'BusinessDetail'
left join companies as c on c.id = p.company_id
left join companies as p_c on p_c.id = p.parent_company_id
where
p.id is not null
) as parts
union (
select p.id, p.first_name,p.last_name,prm.person_role_id, p.job_title, 'cp email', 'phone','ext',c.name, d.name
from people as p -- All those people
left join person_role_memberships as prm on prm.person_id = p.id -- whose roles are like this
left join companies as c on p.company_id = c.id
left join companies as d on c.parent_id = d.id
-- and whose companies are like those people whose roles are like this
where company_id = any
(
select company_id from people as p
left join person_role_memberships as prm on prm.person_id = p.id
where prm.person_role_id between 32 and 35-- and other conditions;
)
and (person_role_id = 14 or person_role_id = 15))