title: oracle string replace odd number of slash at the end of string
body: <p>In Oracle pl sql how to add one SLASH if a field ends with ODD NUMBER OF SLASH?</p>
  <p>For example for a column c I want:</p>
  <pre><code>    AAA\ converts to AAA\\
      AAA do nothing
      AAA\\ do nothing
      AAA\\\ converts to AAA\\\\
      AAA\\\\ do nothing
      AAA\\\\\ converts to AAA\\\\\\
  </code></pre>