Docs: added missing columns to table pg_trigger
<entry colname="col4">The table referenced by an referential integrity
constraint.</entry>
</row>
+ <row>
+ <entry><codeph>tgconstrindid</codeph></entry>
+ <entry>oid</entry>
+ <entry><i>pg_class.oid</i></entry>
+ <entry>The index supporting a unique, primary key, or referential integrity
+ constraint.</entry>
+ </row>
+ <row>
+ <entry><codeph>tgconstraint</codeph></entry>
+ <entry>oid</entry>
+ <entry><i>pg_constraint.oid</i></entry>
+ <entry>The <codeph>pg_constraint</codeph> entry associated with the trigger, if
+ any.</entry>
+ </row>
<row>
<entry colname="col1"><codeph>tgdeferrable</codeph></entry>
<entry colname="col2">boolean</entry>
<entry colname="col3"/>
<entry colname="col4">Argument strings to pass to trigger, each NULL-terminated.</entry>
</row>
+ <row>
+ <entry><codeph>tgqual</codeph></entry>
+ <entry>pg_node_tree</entry>
+ <entry/>
+ <entry>Expression tree (in <codeph>nodeToString()</codeph> representation) for the
+ trigger's <codeph>WHEN</codeph> condition, or null if none.</entry>
+ </row>
</tbody>
</tgroup>
</table>
