azure-log-analytics - 查询输出并获取最新文件名

Question

以下是 kusto 查询：

ADFActivityRun
| where PipelineName contains "MyPipeline" 
| where OperationName == "Failed" 
| order by TimeGenerated desc
| take 1

输出列给出以下结果：

    "{
  ""name"": ""varFileNames"",
  ""value"": [
    {
      ""name"": ""Z400_EEE_20191110_ERR.txt"",
      ""type"": ""File""
    },
    {
      ""name"": ""Z400_CCC_20191119_ERR.txt"",
      ""type"": ""File""
    },
    {
      ""name"": ""Z400_DDD_20191121_ERR.txt"",
      ""type"": ""File""
    },
    {
      ""name"": ""Z400_EEE_20191122_ERR.txt"",
      ""type"": ""File""
    },
    {
      ""name"": ""Z400_AAA_20191202_ERR.txt"",
      ""type"": ""File""
    }
  ]
}"

文件名中包含 yyyymmdd。我只想获取最新的文本文件名。在上述情况下 - Z400_AAA_20191202_ERR.txt

意图是发送警报 - “上述错误文件可用，请检查此文件”

Answer 1

你可以mv-apply用来实现这一点。

例如：

print d = dynamic({
    "name": "varFileNames",
    "value": [
        {
            "name": "Z400_EEE_20191110_ERR.txt",
            "type": "File"
        },
        {
            "name": "Z400_CCC_20191119_ERR.txt",
            "type": "File"
        },
        {
            "name": "Z400_DDD_20191121_ERR.txt",
            "type": "File"
        },
        {
            "name": "Z400_EEE_20191122_ERR.txt",
            "type": "File"
        },
        {
            "name": "Z400_AAA_20191202_ERR.txt",
            "type": "File"
        }
    ]
})
| mv-apply value = d.value on (
    parse value.name with * "_" * "_" dt:datetime "_" *
    | top 1 by dt desc
    | project name = value.name
)
| project name