title: What is PostgreSQL equivalent for MSSQL EXEC @return_value = procedurename @par1, @par2= @result OUTPUT?
body: <p>What is PostgreSQL equivalent for MSSQL</p>
  <pre><code>EXEC @return_value = procedurename @par1, @par2= @result 
  </code></pre>
  <p>OUTPUT? Does anyone know is there such an equivalent in Postgres for <code>@return_value</code>?</p>