PostgreSQL: UPDATE ... ON MISSING INSERT?
<p>PostgreSQL has "<code>INSERT ... ON CONFLICT UPDATE</code>" construct, but in my queries in most cases I need UPDATE.</p>

<p>So I don't want that DB will try insert and only then update, I want that it will try <code>UPDATE</code> and if the record does not exist - will <code>INSERT</code>.</p>

<p>Is it possible?
Will it increase performance?</p>