<structfield>parameter_style</structfield> <type>character_data</type>
      </para>
      <para>
       Always <literal>GENERAL</literal> (The SQL standard defines
       other parameter styles, which are not available in <productname>PostgreSQL</productname>.)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>is_deterministic</structfield> <type>yes_or_no</type>
      </para>
      <para>
       If the function is declared immutable (called deterministic in
       the SQL standard), then <literal>YES</literal>, else
       <literal>NO</literal>.  (You cannot query the other volatility
       levels available in <productname>PostgreSQL</productname> through the information schema.)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>sql_data_access</structfield> <type>character_data</type>
      </para>
      <para>
       Always <literal>MODIFIES</literal>, meaning that the function
       possibly modifies SQL data.  This information is not useful for
       <productname>PostgreSQL</productname>.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>is_null_call</structfield> <type>yes_or_no</type>
      </para>
      <para>
       If the function automatically returns null if any of its
       arguments are null, then <literal>YES</literal>, else
       <literal>NO</literal>.  Null for a procedure.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>sql_path</structfield> <type>character_data</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>schema_level_routine</structfield> <type>yes_or_no</type>
      </para>
      <para>
       Always <literal>YES</literal> (The opposite would be a method
       of a user-defined type, which is a feature not available in
       <productname>PostgreSQL</productname>.)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>max_dynamic_result_sets</structfield> <type>cardinal_number</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>is_user_defined_cast</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>is_implicitly_invocable</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>security_type</structfield> <type>character_data</type>
      </para>
      <para>
       If the function runs with the privileges of the current user,
       then <literal>INVOKER</literal>, if the function runs with the
       privileges of the user who defined it, then
       <literal>DEFINER</literal>.
      </para></entry>
     </row>

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