title: Bigquery table Mk command not working -- schema error
body: <p>I tried</p>
  <pre><code> bq mk -t \
  &gt; --schema schema.json \
  &gt; --time_partitioning_field flight_date data_analysis.flight_delays_json_partitioned
  </code></pre>
  <p>BigQuery error in mk operation:</p>
  <blockquote>
  <p>Invalid field name &quot;schema.json&quot;. Fields must contain only letters, numbers, and underscores, start with a letter or underscore,
  and be at most 300 characters long.</p>
  </blockquote>
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