Search notes:

ORA-30008: CONNECT BY clause must reference a PRIOR

select
   level
from
   dual connect by level <= 5;
--
--      LEVEL
-- ----------
--          1
--          2
--          3
--          4
--          5

Using connect by without prior clause is not allowed, but not enforced by default.

The following «fix» enforces it:

alter session set "_fix_control" = '6520717:on';

Now, the same statement throws ORA-30008: CONNECT BY clause must reference a PRIOR:

select
   level
from
   dual connect by level <= 5;

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...', 1740445399, '3.145.46.212', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/errors/ORA-30008_CONNECT-BY-clause-must-reference-a-PRIOR(60): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78

ORA-30008: CONNECT BY clause must reference a PRIOR

See also