如果有 1 个元素，如何防止 ConvertFromJson 折叠嵌套数组

考虑这两个JSON文件:

{
  "tables": [
    {
      "columns": [
        {
          "name": "action",
          "type": "string"
        },
        {
          "name": "region",
          "type": "string"
        },
        {
          "name": "count_",
          "type": "long"
        },
        {
          "name": "min_timestamp",
          "type": "datetime"
        },
        {
          "name": "max_timestamp",
          "type": "datetime"
        }
      ],
      "name": "PrimaryResult",
      "rows": [
        [
          "ChangePassword",
          "CN",
          1,
          "2022-07-19T11:51:52.8430729Z",
          "2022-07-19T11:51:52.8430729Z"
        ]
      ]
    }
  ]
}

{
  "tables": [
    {
      "columns": [
        {
          "name": "action",
          "type": "string"
        },
        {
          "name": "region",
          "type": "string"
        },
        {
          "name": "count_",
          "type": "long"
        },
        {
          "name": "min_timestamp",
          "type": "datetime"
        },
        {
          "name": "max_timestamp",
          "type": "datetime"
        }
      ],
      "name": "PrimaryResult",
      "rows": [
        [
          "ChangePassword",
          "CN",
          1,
          "2022-07-19T11:51:52.8430729Z",
          "2022-07-19T11:51:52.8430729Z"
        ],
        [
          "Register",
          "CN",
          1,
          "2022-07-19T11:51:52.8430729Z",
          "2022-07-19T11:51:52.8430729Z"
        ]
      ]
    }
  ]
}

它们具有完全相同的模式，并且几乎相同.不同之处在于，第一个文件在rows属性中有1行，第二个文件在rows属性中有2行.

我使用ConvertFrom-Json将文件加载到PowerShell.当我开始访问.tables.rows[0]时，我希望它将返回第一行.

然而，在只有一行的第一个文件中，它实际上返回第一行的第一列.

(gc file1.json | ConvertFrom-Json).tables.rows[0]

输出:

ChangePassword

如果第二个文件中有超过1行，则.tables.rows[0]的行为与预期相同.

(gc file2.json | ConvertFrom-Json).tables.rows[0]

输出:

ChangePassword
CN
1
2022-07-19T11:51:52.8430729Z
2022-07-19T11:51:52.8430729Z

我如何在PowerShell中可靠地处理这些JSON文件，而不管其中是一行还是多行？

顺便说一句，这些实际上是az cli生成的JSON文件，是Azure Application Insights查询的结果.