code: @Override
      public int getScale( int column ) {
          JcrType typeInfo = getJcrType(column);
          if (typeInfo.getJcrType() == PropertyType.DOUBLE) {
              return 3; // pulled from thin air
          }
          return 0;
      }
docs: {@inheritDoc}
  <p>
  This method returns the number of digits behind the decimal point, which is assumed to be 3 if the type is
  {@link PropertyType#DOUBLE} or 0 otherwise.
  </p>
  
  @see java.sql.ResultSetMetaData#getScale(int)