When in doubt, check the manual ;)

Manuals are available in pdf format from metalink and
in html and pdf format from http://technet.oracle.com
(free registration).

Per the SQL Reference manual on the create index
statement:

To create a function-based index in your own schema on
your own table, in addition to the prerequisites for
creating a conventional index, you must have the QUERY
REWRITE system privilege. To create the index in
another schema or on another schema's table, you must
have the GLOBAL QUERY REWRITE privilege. In both
cases,
the table owner must also have the EXECUTE object
privilege on the function(s) used in the
function-based index. In addition, in order for Oracle
to use
function-based indexes in queries, the
QUERY_REWRITE_ENABLED parameter must be set to true,
and the QUERY_REWRITE_INTEGRITY parameter must be set
to trusted. 

Also see Note: 66277.1 Oracle 8i: Concepts and Usage
of Function Based Indexes"

HTH,

-- Anita

--- "Andor, Gyula" <[EMAIL PROTECTED]> wrote:
> Hi Gurus !
> 
> Please help me. I can't create function based index
> because it says:
> 
> 
> ERROR at line 1:
> ORA-01031: insufficient privileges
> 
> I have a table which contains a column called
> lang_name. I try to create
> function based index on the table with the following
>  sql statement:
> 
> create index func_idx_lang_name on lang
> (upper(lang_name));
> 
> I have "create any index privilege"
> 
> Enviroment:
> Oracle 8.1.6 on WinNT
> 
> Thanks in advance.
> Gyula
> -- 
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> -- 
> Author: Andor, Gyula
>   INET: [EMAIL PROTECTED]
> 
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