错误 4.5 Expression must be a group key or aggregate

Question

升级到 Couchbase 4.5 后，我开始收到此错误 "Expression must be a group key or aggregate (write.timestamp)","code":4210}。我在这里做错了什么？这是我的查询

select max(timestamp) as lastDetect, count(timestamp) as detectCount from write where docType is not missing AND docType = 'DetectRecord' AND proximityUUID = $uuid AND major = $major AND minor = $minor AND timestamp BETWEEN $startTime AND $endTime ORDER BY timestamp desc limit 1;

示例文档：

{ "id": "1234k", "docType": "DetectRecord", "proximityUUID": "12kdf", "major": "dkf", "minor": "ad", "timestamp": 1464954200000 }

Answer 1

这是由添加到 couchbase 4.5 (http://developer.couchbase.com/documentation/server/4.5/release-notes/relnotes.html) 的更改引起的。将查询更改为以下内容为我解决了这个问题。

select max(timestamp) as lastDetect, count(timestamp) as detectCount 
from write 
where docType is not missing AND docType = 'DetectRecord' AND proximityUUID = $uuid AND major = $major AND minor = $minor AND timestamp BETWEEN $startTime AND $endTime 
GROUP BY timestamp
ORDER BY timestamp desc limit 1;

Answer 2

是的，Marquis，N1QL 在 4.5 中强制执行正确的 GROUP BY syntax/semantics。发行说明 "behavior changes" 中提到了这一点：http://developer.couchbase.com/documentation/server/4.5/release-notes/relnotes.html

错误 4.5 Expression must be a group key or aggregate

Error in 4.5 Expression must be a group key or aggregate

database

couchbase

n1ql