Question

我使用以下查询查询CosmosDB数据库：

SELECT c.EventType.EndDeviceEventDetail FROM c 
WHERE (c.EventType.EndDeviceEventType.eventOrAction = '93'
AND c.EventType.EndDeviceEventType.subdomain = '137'
AND c.EventType.EndDeviceEventType.domain = '26'
AND c.EventType.EndDeviceEventType.type = '3')

我得到回应

[
    {
        "EndDeviceEventDetail": [
            {
                "name": "Spontaneous",
                "value": "true"
            },
            {
                "name": "DetectionActive",
                "value": "true"
            },
            {
                "name": "RCDSwitchReleased",
                "value": "false"
            }
        ]
    },
    {
        "EndDeviceEventDetail": [
            {
                "name": "Spontaneous",
                "value": "true"
            },
            {
                "name": "DetectionActive",
                "value": "true"
            },
            {
                "name": "RCDSwitchReleased",
                "value": "true"
            }
        ]
    }
]

我想更进一步，修改查询，以便仅在“ RCDSwitchReleased”为true时得到响应。

我天真的尝试没有成功：

SELECT c.EventType.EndDeviceEventDetail FROM c 
WHERE (c.EventType.EndDeviceEventType.eventOrAction = '93'
AND c.EventType.EndDeviceEventType.subdomain = '137'
AND c.EventType.EndDeviceEventType.domain = '26'
AND c.EventType.EndDeviceEventType.type = '3')
AND c.EventType.EndDeviceEventDetail[2].value = 'true'

但是我收到BadRequest（400）错误消息。有什么方向/帮助实现这一目标吗？

Answer 1

Value关键字存在问题。 Cosmos SQL以多种不同方式使用Value Keyword，这可能是一个原因，我们无法在选择查询中使用值字段。

我用value1而不是value更改了文档，然后您的查询开始工作了。

建议

如果要在数组中应用过滤器，请始终使用Array_Contains。如果数组EndDeviceEventDetail中的值顺序将改变，则查询将不会返回正确的结果。

我的查询

SELECT c.EventType.EndDeviceEventDetail FROM c 
WHERE c.EventType.EndDeviceEventType.eventOrAction = '93'
AND c.EventType.EndDeviceEventType.subdomain = '137'
AND c.EventType.EndDeviceEventType.domain = '26'
AND c.EventType.EndDeviceEventType.type = '3'
AND ARRAY_CONTAINS(c.EventType.EndDeviceEventDetail,{"name": 
"RCDSwitchReleased","value1": "true" })

查询输出

[
{
    "EndDeviceEventDetail": [
        {
            "name": "Spontaneous",
            "value1": "true"
        },
        {
            "name": "DetectionActive",
            "value1": "true"
        },
        {
            "name": "RCDSwitchReleased",
            "value1": "true"
        }
    ]
}
]

检查数组的内容-CosmosDB

1 个答案: