Ich habe eine harte Zeit um den Kopf, wie die Spalte product_count
funktioniert. Es scheint sich irgendwie mit den Aliasen see
und e
zu referenzieren, die beide auf catalog_category_entity
zeigen. InsbesondereMySQL: Spalte aus einer selbst referenzierenden (?) SELECT-Abfrage generiert
WHERE (see.entity_id = e.entity_id) OR (see.path LIKE CONCAT(e.path, '/%'))
Sowohl see
und e
sind Aliasnamen für Tabellen catalog_category_entity
. Was macht das?
Hier ist die gesamte Abfrage:
SELECT `e`.*, `d_name`.`value` AS `name`, IF(s_name.value_id > 0, s_name.value, d_name.value) AS `name`, `d_is_active`.`value` AS `is_active`, IF(s_is_active.value_id > 0, s_is_active.value, d_is_active.value) AS `is_active`, `d_is_anchor`.`value` AS `is_anchor`, IF(s_is_anchor.value_id > 0, s_is_anchor.value, d_is_anchor.value) AS `is_anchor`,
(
SELECT COUNT(DISTINCT scp.product_id)
FROM `catalog_category_entity` AS `see`
LEFT JOIN `catalog_category_product` AS `scp`
ON see.entity_id=scp.category_id
WHERE (see.entity_id = e.entity_id) OR (see.path LIKE CONCAT(e.path, '/%'))
) AS `product_count`,
(
SELECT COUNT(cp.product_id)
FROM `catalog_category_product` AS `cp`
WHERE (cp.category_id = e.entity_id)
) AS `self_product_count`
FROM `catalog_category_entity` AS `e`
LEFT JOIN `catalog_category_entity_varchar` AS `d_name` ON d_name.entity_id=e.entity_id AND d_name.attribute_id=41 AND d_name.entity_type_id=e.entity_type_id AND d_name.store_id=0
LEFT JOIN `catalog_category_entity_varchar` AS `s_name` ON s_name.entity_id=e.entity_id AND s_name.attribute_id=41 AND s_name.entity_type_id=e.entity_type_id AND s_name.store_id=0
LEFT JOIN `catalog_category_entity_int` AS `d_is_active` ON d_is_active.entity_id=e.entity_id AND d_is_active.attribute_id=42 AND d_is_active.entity_type_id=e.entity_type_id AND d_is_active.store_id=0
LEFT JOIN `catalog_category_entity_int` AS `s_is_active` ON s_is_active.entity_id=e.entity_id AND s_is_active.attribute_id=42 AND s_is_active.entity_type_id=e.entity_type_id AND s_is_active.store_id=0
LEFT JOIN `catalog_category_entity_int` AS `d_is_anchor` ON d_is_anchor.entity_id=e.entity_id AND d_is_anchor.attribute_id=51 AND d_is_anchor.entity_type_id=e.entity_type_id AND d_is_anchor.store_id=0
LEFT JOIN `catalog_category_entity_int` AS `s_is_anchor` ON s_is_anchor.entity_id=e.entity_id AND s_is_anchor.attribute_id=51 AND s_is_anchor.entity_type_id=e.entity_type_id AND s_is_anchor.store_id=0
WHERE (`e`.`entity_type_id` = '3') AND (e.entity_id IN('24', '533')) ORDER BY LENGTH(e.path) ASC
dies ist vielleicht die die meisten selbst verbundenen Abfrage ich je gesehen habe. was versuchst du damit zu erreichen? Ich wette, es gibt viel bessere Möglichkeiten, Sie dorthin zu bringen ... –
Ich gebe die Produktanzahl, unter vielen anderen Dingen, der Kategorien '24' und' 533' zurück. Ich habe das nicht geschrieben, und ich frage mich nur, wie die WHERE-Anweisung der 'product_count'-Spalte funktioniert. – musicliftsme