<input name="field_extra[<?php echo $columnNumber; ?>]"
id="field_<?php echo $columnNumber?>_<?php echo ($ci - $ci_offset); ?>"
<?php if (isset($columnMeta['Extra'])
&& /*overload*/mb_strtolower($columnMeta['Extra']) == 'auto_increment'): ?>
checked="checked"
<?php endif; ?>
type="checkbox"
value="AUTO_INCREMENT" />