title: U-SQL Json Extractor is only pulling one record
body: <p>I'm testing data lake for an application I am developing. I'm new to U-SQL and data lake and am just trying to query all records in a JSON file. Right now, It's only returning one record and I'm not sure why because the file has about 200. </p>
  
  <p>My code is:</p>
  
  <pre><code>DECLARE @input string = @"/MSEStream/output/2016/08/12_0_fc829ede3c1d4cf9a3278d43e7e4e9d0.json";
  
  REFERENCE ASSEMBLY [Newtonsoft.Json];
  REFERENCE ASSEMBLY [Microsoft.Analytics.Samples.Formats];
  
  
  @allposts = 
  EXTRACT 
      id  string
  FROM @input 
  USING new Microsoft.Analytics.Samples.Formats.Json.JsonExtractor();
  
  @result =
  SELECT *
  FROM @allposts;
  
  OUTPUT  @result
  TO  "/ProcessedQueries/all_posts.csv"
  USING Outputters.Csv();
  </code></pre>
  
  <p>Data Example:</p>
  
  <pre><code>{
  "id":"398507",
  "contenttype":"POST",
  "posttype":"post",
  "uri":"http://twitter.com/etc",
  "title":null,
  "profile":{
     "@class":"PublisherV2_0",
     "name":"Company",
     "id":"2163171",
     "profileIcon":"https://pbs.twimg.com/image",
     "profileLocation":{
        "@class":"DocumentLocation",
        "locality":"Toronto",
        "adminDistrict":"ON",
        "countryRegion":"Canada",
        "coordinates":{
           "latitude":43.7217,
           "longitude":-31.432},
           "quadKey":"000000000000000"},
        "displayName":"Name",
        "externalId":"00000000000"},
     "source":{
         "name":"blogs",
         "id":"18",
         "param":"Twitter"},
     "content":{
         "text":"Description of post"},
         "language":{
             "name":"English",
             "code":"en"},
         "abstracttext":"More Text and links",
         "score":{}
     }
  }
  </code></pre>
  
  <p>Thank you for the help in advance</p>