title: Using PostgreSQL, how do I escape "\" in json columns?
body: <p>I'm using Postgres 9.5 and I have a column ("info") of type 'json'... I'm trying to do this insert:</p>
  
  <pre><code>INSERT INTO table ( info )
  VALUES (
    '{"entry":"((\+)[0-9]+)"}'
  )
  </code></pre>
  
  <p>but I get this error:</p>
  
  <pre><code>ERROR:  invalid input syntax for type json
  DETAIL:  Escape sequence "\+" is invalid.
  </code></pre>
  
  <p>It's interpreting <code>\+</code> as an escape sequence but I actually want that as part of my value.</p>