title: Azure ADF - Array elements can only be selected using an integer index
body: <p>Hi I am trying to select  Status from Json Array in azure data factory</p>
  
  <pre><code>{
      "dataRead": 2997,
      "dataWritten": 2714,
      "filesWritten": 1,
      "sourcePeakConnections": 1,
      "sinkPeakConnections": 1,
      "rowsRead": 11,
      "rowsCopied": 11,
      "copyDuration": 3,
      "throughput": 0.976,
      "errors": [],
      "effectiveIntegrationRuntime": "DefaultIntegrationRuntime (East US)",
      "usedDataIntegrationUnits": 4,
      "billingReference": {
          "activityType": "DataMovement",
          "billableDuration": [
              {
                  "meterType": "AzureIR",
                  "duration": 0.06666666666666667,
                  "unit": "DIUHours"
              }
          ]
      },
      "usedParallelCopies": 1,
      "executionDetails": [
          {
              "source": {
                  "type": "AzureSqlDatabase",
                  "region": "East US"
              },
              "sink": {
                  "type": "AzureBlobStorage",
                  "region": "East US"
              },
              "status": "Succeeded",
              "start": "2020-03-19T06:24:39.0666585Z",
              "duration": 3,
              "usedDataIntegrationUnits": 4,
              "usedParallelCopies": 1,
  </code></pre>
  
  <p>I have tried selecting <code>@activity('Copy data From CCP TO Blob').output.executionDetails.status</code>.It throws an error:</p>
  
  <blockquote>
    <p>'Array elements can only be selected using an integer index'.</p>
  </blockquote>
  
  <p>Any way to resolve it?</p>