role="catalog_table_entry"><para role="column_definition">
       <structfield>as_locator</structfield> <type>yes_or_no</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>parameter_name</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the parameter, or null if the parameter has no name
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>data_type</structfield> <type>character_data</type>
      </para>
      <para>
       Data type of the parameter, if it is a built-in type, or
       <literal>ARRAY</literal> if it is some array (in that case, see
       the view <literal>element_types</literal>), else
       <literal>USER-DEFINED</literal> (in that case, the type is
       identified in <literal>udt_name</literal> and associated
       columns).
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_maximum_length</structfield> <type>cardinal_number</type>
      </para>
      <para>
       Always null, since this information is not applied to parameter data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_octet_length</structfield> <type>cardinal_number</type>
      </para>
      <para>
       Always null, since this information is not applied to parameter data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_set_catalog</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_set_schema</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_set_name</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collation_catalog</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Always null, since this information is not applied to parameter data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collation_schema</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Always null, since this information is not applied to parameter data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collation_name</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Always null, since this information is not applied to parameter data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>numeric_precision</structfield> <type>cardinal_number</type>
      </para>
      <para>
       Always