title: h2 default DECIMAL precision performance
body: <p>When I create <code>DECIMAL</code> column with default precision setting, in H2 web console this column is defined as <code>DECIMAL(65535, 32767)</code>, command "show columns from ..." gives me <code>DECIMAL(65535)</code>.</p>
  
  <p>Decimal data type in H2 is mapped to <code>BigDecimal</code> (from H2 documentation), but I'm not sure how H2 deals with it.</p>
  
  <p>Are there any performance gains, if I use smaller precision?</p>