title: BigQuery - No matching signature for operator = for argument types: INT64, STRING
body: <p>Im getting a weird error(Maybe im getting this error for the first time) from BQ.</p>
  <pre><code>No matching signature for operator = for argument types: INT64, STRING. 
  Supported signatures: ANY = ANY at [27:1]
  </code></pre>
  <p>Query:</p>
  <pre class="lang-sql prettyprint-override"><code>SELECT col1
      ,col2
      ,col3
  FROM tbl1
  JOIN t2 ON t1.id = t2.id
  JOIN t3 on t2.id = t3.id
  JOIN t4 on t4.id = t1.id
  </code></pre>
  <p>Error line <code>JOIN t2.id = t3.id</code>  <strong>t2.id</strong> is showing this error.</p>
  <p>its an integer column.</p>