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我有5个布尔列的表。为布尔列创建索引
on_stock | paid | received_payment | on_the_way | received
如何为此表创建索引?我应该这样做吗?我想优化这样的查询:
SELECT "order".* FROM "order" INNER JOIN "seller_users" ON "order"."seller_foreign_id" = "seller_users"."google_id"
WHERE(((("order"."on_stock" <> true AND "order"."on_the_way" <> true) AND "order"."paid" <> true) AND "order"."received_payment" <> true) AND "order"."received" <> true) AND ("seller_users"."google_id" = '[email protected]')
ORDER BY "order"."updated_at" DESC ;
当我尝试添加此索引 - 什么也没有发生。该索引未被使用。
add_index :order, [:on_stock, :on_the_way, :paid, :received_payment, :received], :name => "state_index"
如果我为每列添加单独的index
- 没有任何反应。
EXPLAIN ANALYZE
输出: http://explain.depesz.com/s/FS2
您必须为每列创建单独的“索引”。 – usmanali
@usmanali,它没有改变任何东西。 –
请你可以在EXPLAIN ANALYZE输出中作为文本[编辑]。或者将其粘贴到http://explain.depesz.com – IMSoP