exclusion constraint
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>condeferrable</structfield> <type>bool</type>
      </para>
      <para>
       Is the constraint deferrable?
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>condeferred</structfield> <type>bool</type>
      </para>
      <para>
       Is the constraint deferred by default?
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>conenforced</structfield> <type>bool</type>
      </para>
      <para>
       Is the constraint enforced?
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>convalidated</structfield> <type>bool</type>
      </para>
      <para>
       Has the constraint been validated?
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>conrelid</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-class"><structname>pg_class</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       The table this constraint is on; zero if not a table constraint
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>contypid</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-type"><structname>pg_type</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       The domain this constraint is on; zero if not a domain constraint
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>conindid</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-class"><structname>pg_class</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       The index supporting this constraint, if it's a unique, primary
       key, foreign key, or exclusion constraint; else zero
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>conparentid</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-constraint"><structname>pg_constraint</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       The corresponding constraint of the parent partitioned table,
       if this is a constraint on a partition; else zero
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>confrelid</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-class"><structname>pg_class</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       If a foreign key, the referenced table; else zero
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>confupdtype</structfield> <type>char</type>
      </para>
      <para>
       Foreign key update action code:
       <literal>a</literal> = no action,
       <literal>r</literal> = restrict,
       <literal>c</literal> = cascade,
       <literal>n</literal> = set null,
       <literal>d</literal> = set default
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>confdeltype</structfield> <type>char</type>
      </para>
      <para>
       Foreign key deletion action code:
       <literal>a</literal> = no action,
       <literal>r</literal> = restrict,
       <literal>c</literal> = cascade,
       <literal>n</literal> = set null,