错误：order by 查询没有可以从中提供服务的相应复合索引

Question

执行以下查询时，我收到一个错误

select * from c order by c.Agent.LastStateChangeUnixTime desc,c.Priority asc

order by 查询没有相应的复合索引可以从中提供服务

我在此处和此处的文档中添加了复合索引

我的综合指数错了吗？还是我错过了其他东西？

我的索引设置是：

{
    "indexingMode": "consistent",
    "automatic": true,
    "includedPaths": [
        {
            "path": "/*"
        }
    ],
    "excludedPaths": [
        {
            "path": "/\"_etag\"/?"
        }
    ],
    "compositeIndexes": [
        [
            {
                "path": "/Priority",
                "order": "descending"
            },
            {
                "path": "/Agent/LastStateChangeUnixTime",
                "order": "ascending"
            }
        ]
    ]
}

示例对象：

{
    "Agent": {
        "TenantId": 999999,
        "PrimaryState": "Null",
        "PendingState": "Null",
        "LastStateChange": "2020-01-18T05:48:11.5397269+00:00",
        "LastStateChangeUnixTime": 1579326491,
        "Notes": null,
        "AgentId": 123,
        "id": "agent-123"
    },
    "AgentId": 123,
    "SkillName": "English",
    "id": "SkillName123",
    "Priority": 10,
    "_rid": "SVIMANKqJboCAAAAAAAAAA==",
    "_self": "dbs/SVIMAA==/colls/SVIMANKqJbo=/docs/SVIMANKqJboCAAAAAAAAAA==/",
    "_etag": "\"2200819a-0000-0700-0000-5e229c1d0000\"",
    "_attachments": "attachments/",
    "_ts": 1579326493
}

Answer 1

是的，您的复合索引对于此查询不正确。它们出现的顺序很重要，因此 WHERE 子句需要匹配顺序。

将以下内容更改或添加到您的复合索引中。

"compositeIndexes": [
    [
        {
            "path": "/Agent/LastStateChangeUnixTime",
            "order": "descending"
        },
        {
            "path": "/Priority",
            "order": "ascending"
        }
    ]
]