Search notes:

Oracle: SYS.CDEF$

Constraint definitions.
select
  decode(type#,
    12, 'USER LOG GROUP',
    14, 'PRIMARY KEY LOGGING',
    15, 'UNIQUE KEY LOGGING',
    16, 'FOREIGN KEY LOGGING',
    17, 'ALL COLUMN LOGGING',
        '???'
    ) type,
    case bitand(defer,64) when 64 then 'ALWAYS'         else  'CONDITIONAL' end,
    case bitand(defer, 8) when  8 then 'GENERATED NAME' else  'USER NAME'   end
from
   sys.cdef$;

See also

MOS Note 1553211.1
con$

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...', 1759562103, '216.73.216.149', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/installed/data-dictionary/base-tables/cdef(54): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78