Search notes:

X$KGLDP

Object dependency.
Compare with read only dependencies in x$kglrd.

Join with X$KGLOB

x$kgldp can be joined to x$kglob and x$kglxs: 
select
   xob.kglnaobj,
   cur.kglnaobj,
   xob.kglnaobj
from
   x$kglob xob                                      join
   x$kgldp dep  on xob.kglhdadr = dep.kglrfhdl      join
   x$kglob cur  on dep.kglhdadr = cur.kglhdadr      join
   x$kglxs axs  on dep.kglhdadr = axs.kglhdadr and        --  make sure it is not a transitive
                   dep.kgldepno = axs.kglxsdep            --  reference, but a direct one
where
    cur.kglhdnsp = 0 -- a cursor
;

See also

dba_dependencies
fixed table
$ORACLE_HOME/rdbms/admin/utldtree.sql

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1758200739, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/architecture/instance/fixed-tables/k/g/l/dp/index(63): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78