title: Insert salutation depending on the number of characters
body: <p>Where salutation is >15 characters, the word ‘Hi’ is to be inserted in the  field</p>
  
  <p>thought about using a regex function, but not sure how to implement this</p>
  
  <p>when regexp_like(salutation, > '^[0-9]{15}$') then 'Hi'</p>
  
  <pre><code>MR Nigel Humphreys  -&gt; "hi"
  Ms Montjoy          -&gt;  "Ms Montjoy"
  Mr Fitz-Lloyd Smith -&gt; "hi"
  </code></pre>