j'ai une requête de rapports qui ont 2 à long sous-requêtecomment éviter la sous-requête pour obtenir des performances
SELECT r1.code_centre, r1.libelle_centre, r1.id_equipe, r1.equipe, r1.id_file_attente,
r1.libelle_file_attente,r1.id_date, r1.tranche, r1.id_granularite_de_periode,r1.granularite,
r1.ContactsTraites, r1.ContactsenParcage, r1.ContactsenComm, r1.DureeTraitementContacts,
r1.DureeComm, r1.DureeParcage, r2.AgentsConnectes, r2.DureeConnexion, r2.DureeTraitementAgents,
r2.DureePostTraitement
FROM
(SELECT cc.id_centre_contact, cc.code_centre, cc.libelle_centre, a.id_equipe, a.equipe,
a.id_file_attente, f.libelle_file_attente, a.id_date, g.tranche, g.id_granularite_de_periode,
g.granularite, sum(Nb_Contacts_Traites) as ContactsTraites,
sum(Nb_Contacts_en_Parcage) as ContactsenParcage,
sum(Nb_Contacts_en_Communication) as ContactsenComm,
sum(Duree_Traitement/1000) as DureeTraitementContacts,
sum(Duree_Communication/1000 + Duree_Conference/1000 + Duree_Com_Interagent/1000) as DureeComm,
sum(Duree_Parcage/1000) as DureeParcage
FROM agr_synthese_activite_media_fa_agent a, centre_contact cc,
direction_contact dc, granularite_de_periode g, media m, file_attente f
WHERE m.id_media = a.id_media
AND cc.id_centre_contact = a.id_centre_contact
AND a.id_direction_contact = dc.id_direction_contact
AND dc.direction_contact ='INCOMING'
AND a.id_file_attente = f.id_file_attente
AND m.media = 'PHONE'
AND ( (g.valeur_min = date_format(a.id_date,'%d/%m') and g.granularite = 'Jour')
or (g.granularite = 'Heure' and a.id_th_heure = g.id_granularite_de_periode) )
GROUP by cc.id_centre_contact, a.id_equipe, a.id_file_attente, a.id_date, g.tranche,
g.id_granularite_de_periode) r1,
(
(SELECT cc.id_centre_contact,cc.code_centre, cc.libelle_centre, a.id_equipe, a.equipe,
a.id_date, g.tranche, g.id_granularite_de_periode,g.granularite,
count(distinct a.id_agent) as AgentsConnectes,
sum(Duree_Connexion/1000) as DureeConnexion,
sum(Duree_en_Traitement/1000) as DureeTraitementAgents,
sum(Duree_en_PostTraitement/1000) as DureePostTraitement
FROM activite_agent a, centre_contact cc, granularite_de_periode g
WHERE ( g.valeur_min = date_format(a.id_date,'%d/%m') and g.granularite = 'Jour')
AND cc.id_centre_contact = a.id_centre_contact
GROUP BY cc.id_centre_contact, a.id_equipe, a.id_date, g.tranche, g.id_granularite_de_periode)
UNION
(SELECT cc.id_centre_contact,cc.code_centre, cc.libelle_centre, a.id_equipe, a.equipe,
a.id_date, g.tranche, g.id_granularite_de_periode,g.granularite,
count(distinct a.id_agent) as AgentsConnectes,
sum(Duree_Connexion/1000) as DureeConnexion,
sum(Duree_en_Traitement/1000) as DureeTraitementAgents,
sum(Duree_en_PostTraitement/1000) as DureePostTraitement
FROM activite_agent a, centre_contact cc, granularite_de_periode g
WHERE ( g.granularite = 'Heure'
AND a.id_th_heure = g.id_granularite_de_periode)
AND cc.id_centre_contact = a.id_centre_contact
GROUP BY cc.id_centre_contact,a.id_equipe, a.id_date, g.tranche, g.id_granularite_de_periode)
) r2
WHERE r1.id_centre_contact = r2.id_centre_contact
AND r1.id_equipe = r2.id_equipe AND r1.id_date = r2.id_date
AND r1.tranche = r2.tranche AND r1.id_granularite_de_periode = r2.id_granularite_de_periode
GROUP BY r1.id_centre_contact , r1.id_equipe, r1.id_file_attente,
r1.id_date, r1.tranche, r1.id_granularite_de_periode
ORDER BY r1.code_centre, r1.libelle_centre, r1.equipe,
r1.libelle_file_attente, r1.id_date, r1.id_granularite_de_periode,r1.tranche
le EXPLAIN
| id | select_type | table | type| possible_keys | key | key_len | ref| rows | Extra |
'1', 'PRIMARY', '<derived3>', 'ALL', NULL, NULL, NULL, NULL, '2520', 'Using temporary; Using filesort'
'1', 'PRIMARY', '<derived2>', 'ALL', NULL, NULL, NULL, NULL, '4378', 'Using where; Using join buffer'
'3', 'DERIVED', 'a', 'ALL', 'fk_Activite_Agent_centre_contact', NULL, NULL, NULL, '83433', 'Using temporary; Using filesort'
'3', 'DERIVED', 'g', 'ref', 'Index_granularite,Index_Valeur_min', 'Index_Valeur_min', '23', 'func', '1', 'Using where'
'3', 'DERIVED', 'cc', 'ALL', 'PRIMARY', NULL, NULL, NULL, '6', 'Using where; Using join buffer'
'4', 'UNION', 'g', 'ref', 'PRIMARY,Index_granularite', 'Index_granularite', '23', '', '24', 'Using where; Using temporary; Using filesort'
'4', 'UNION', 'a', 'ref', 'fk_Activite_Agent_centre_contact,fk_activite_agent_TH_heure', 'fk_activite_agent_TH_heure', '5', 'reporting_acd.g.Id_Granularite_de_periode', '2979', 'Using where'
'4', 'UNION', 'cc', 'ALL', 'PRIMARY', NULL, NULL, NULL, '6', 'Using where; Using join buffer'
NULL, 'UNION RESULT', '<union3,4>', 'ALL', NULL, NULL, NULL, NULL, NULL, ''
'2', 'DERIVED', 'g', 'range', 'PRIMARY,Index_granularite,Index_Valeur_min', 'Index_granularite', '23', NULL, '389', 'Using where; Using temporary; Using filesort'
'2', 'DERIVED', 'a', 'ALL', 'fk_agr_synthese_activite_media_fa_agent_centre_contact,fk_agr_synthese_activite_media_fa_agent_direction_contact,fk_agr_synthese_activite_media_fa_agent_file_attente,fk_agr_synthese_activite_media_fa_agent_media,fk_agr_synthese_activite_media_fa_agent_th_heure', NULL, NULL, NULL, '20903', 'Using where; Using join buffer'
'2', 'DERIVED', 'cc', 'eq_ref', 'PRIMARY', 'PRIMARY', '4', 'reporting_acd.a.Id_Centre_Contact', '1', ''
'2', 'DERIVED', 'f', 'eq_ref', 'PRIMARY', 'PRIMARY', '4', 'reporting_acd.a.Id_File_Attente', '1', ''
'2', 'DERIVED', 'dc', 'eq_ref', 'PRIMARY', 'PRIMARY', '4', 'reporting_acd.a.Id_Direction_Contact', '1', 'Using where'
'2', 'DERIVED', 'm', 'eq_ref', 'PRIMARY', 'PRIMARY', '4', 'reporting_acd.a.Id_Media', '1', 'Using where'
ne le savent pas très clair, mais je pense est le problème de semble il faut balayage complet
que je change toute la sous-requête aux vues (créer l'affichage comme sélection de sous-requête), et le résultat est le même
merci pour tout conseil
Maatkit possède un outil d'explication visuelle. Essayez de l'utiliser pour rendre les résultats EXPLAIN plus clairs. Je ferais mieux de me tuer que d'analyser cela;) –