PowerApps中PowerBI连接器ExecuteDatasetQuery返回空表问题

• 问题与PowerBI磁贴或PowerApps嵌入可视化无关，针对PowerBI数据连接器的ExecuteDatasetQuery方法
• 该方法需传入三个必填参数：workspaceGuid、datasetGuid、queryText，另有可选序列化设置对象
• 异常现象：无论传入何种DAX查询（甚至简单的EVALUATE(MyTable)），返回结果都是行数与预期一致，但无列无值的空表；将结果转为JSON字符串后，确认内容完全为空
• 对比验证：相同的DAX查询在JavaScript API调用、PowerAutomate、PowerBI Desktop中均能正常返回数据
• 当前困境：找不到该连接器及方法的有效官方文档，寻求有相关经验的用户提供解决方向

参考DAX查询示例：

DEFINE
    VAR _reqs = SELECTCOLUMNS(MyTable,
        "ReqNum",[Title],
        "BusinessArea",[BusinessArea],
        "Serial1",[Serial1],
        "Serial2",[Serial2],
        "Department",[Department],
        "OM",[OM],
        "Requestor",[Requestor],
        "StrategicObjective",[ITStrategicObjective],
        "Area",[Area],
        "ProductLine",[ProductLine],
        "ProjectManager",[ProjectManager],
        "BusinessLiaison",[BusinessLiaison],
        "Customer",[Customer],
        "SolutionArchitect",[SolutionArchitect],
        "VicePresident",[VicePresident],
        "Created",DATEVALUE([Created])
    )
EVALUATE
    _reqs
ORDER BY 
    [Created] DESC

内容的提问来源于stack exchange，提问作者ChrisPEditor