title: issue with using csvread in H2 database with unicode characters as delimiter
body: <p>I am trying to use csvread to read from the testfile attached. The file has CTRL-A (\u0001) as delimiter in between fields.</p>
  
  <p>The statement I used is</p>
  
  <pre><code>select * from csvread('test.csv','id, name','charset=UTF-8 fieldDelimiter=\u0001');
  </code></pre>
  
  <p>Expected Output:</p>
  
  <pre><code>ID | Name
  12 | sandeep
  </code></pre>
  
  <p>Actual output:</p>
  
  <pre><code>ID | Name
  12\u0001sandeep | null
  </code></pre>
  
  <p>which means it is not picking \u0001 as the delimiter.</p>
  
  <p>How can I handle <code>CTRL-A(\u0001)</code> as delimiter while doing csvread of a file?</p>