Script to move objects MAXEXTENTS size to UNLIMITED

 sqlplus / as sysdba

SQL*Plus: Release 11.2.0.2.0 Production on Tue Apr 24 18:50:58 2012

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Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning and Automatic Storage Management options

SQL> select banner from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for Linux: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production

SQL> spool runme.sql

select  'alter '||   object_type||' '||   object_name||   ' storage (maxextents unlimited);' from  dba_objects  where  object_type in ('TABLE','INDEX') and owner = 'OWNER_NAME';

SQL> spool off

SQL> @runme

Verify:

SQL> select max_extents,count(*) from dba_indexes where owner='SYSFM' group by max_extents;
SQL> select max_extents,count(*) from dba_tables where owner='SYSFM' group by max_extents;