d>
  <td>mixed</td>
  <td>default value of this column</td>
  <td><a href="/doc/api/1.0/CDbColumnSchema">CDbColumnSchema</a></td>
</tr>
<tr class="inherited" id="isForeignKey">
  <td><a href="/doc/api/1.0/CDbColumnSchema#isForeignKey-detail">isForeignKey</a></td>
  <td>boolean</td>
  <td>whether this column is a foreign key</td>
  <td><a href="/doc/api/1.0/CDbColumnSchema">CDbColumnSchema</a></td>
</tr>
<tr class="inherited" id="isPrimaryKey">
  <td><a href="/doc/api/1.0/CDbColumnSchema#isPrimaryKey-detail"