"sql_features" does not exist( Very Urgent)

<font size="2"><p>Hai,<p>  I create a plpgsql function for grant rights for the postgres users.  The same function is
workingproperly in the previous versions. But it gives the following error message.<p>// Error Message given by the
postgres<p>ERROR: relation "sql_features" does not exist<br />CONTEXT:  PL/pgSQL function "unlockuser" line 6 at
executestatement<p>//***********<p>//******** Function i created ****************<p>create or replace function
unlockuser(name)returns integer as'<p>declare<p>usrname alias for $1;<p>tablelist record;<p>begin<p>for tablelist in
select* from pg_tables where tablename not like ''pg_%'' and tablename not like ''pb%'' order by tablename
loop<p>execute''grant all on ''|| quote_ident(tablelist.tablename)<p>||'' to ''|| usrname;<p>end loop;<p>if not found
then<p>return0;<p>end if;<p>for tablelist in select * from pg_views where viewname not like ''pg_%'' order by viewname
loop<p>execute''grant all on ''|| quote_ident(tablelist.viewname)||'' to ''|| usrname;<p>end loop;<p>if not found
then<p>return0;<p>end if;<p>for tablelist in select * from pg_statio_user_sequences order by relname loop<p>execute
''grantall on ''|| quote_ident(tablelist.relname)||'' to ''|| usrname;<p>end loop;<p>if not found then<p>return
0;<p>endif;<p>return 1;<p>end;<p>'language 'plpgsql';<p>// ****************** *****************<p>Thanks in
advance</font><br/>