title: Does BigQuery JSON export keep uppper/lower case for column names？
body: <p>BigQuery's column names are case-insensitive.
  (<a href="https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical" rel="nofollow noreferrer">https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical</a>)</p>
  
  <p>As far as I tried (below), it seems BigQuery to keep uppper/lower cases for column names when export.</p>
  
  <pre><code>$ bq show --format=sparse sandbox.case_test
  
     Last modified         Schema        Total Rows   Total Bytes   Expiration   Time Partitioning   Labels 
   ----------------- ------------------ ------------ ------------- ------------ ------------------- --------
    11 Sep 12:46:02   |- small: string   1            12                                                    
                      |- LARGE: string
  </code></pre>
  
  <p>This tables has both upper and lower case names.</p>
  
  <pre><code>$ bq extract --destination_format=NEWLINE_DELIMITED_JSON  sandbox.case_test gs://sandbox/case_test.json
  
  
  $ gsutil cat  gs://sandbox/case_test.json
  {"small":"hoge","LARGE":"buzz"}
  </code></pre>
  
  <p>Does anyone know any documents which mention this behavior?</p>