索引没有提高couchbase 4.5的速度

Question

我有以下查询

SELECT day,count(DISTINCT campaignId) campaigns
FROM Inheritx use index(daily_type_1)
where _type='DailyCampaignUsage'
group by day

我的索引低于

 `CREATE INDEX `daily_type_1` ON `Inheritx` 
(`_type`,`day`,(distinct (`campaignId`))) WHERE (`_type` = "DailyCampaignUsage")`

它正在 3s 并且我有52k数据whare _type =“DailyCampaignUsage”

我怎样才能提高它的速度？

Answer 1

修改索引，如下所示。

CREATE INDEX `daily_type_1` ON `Inheritx` (campaignId,`day`)
WHERE (`_type` = "DailyCampaignUsage");

将索引保留在此答案中。修改您的查询，如下所示。

SELECT day,count(DISTINCT campaignId) campaigns
FROM Inheritx use index(daily_type_1)
where _type='DailyCampaignUsage'
and campaignId is not null
group by day;