ALTER PLUGGABLE DATABASE Fails with ORA-00604/ORA-00001: unique constraint (SYS.I_PDB_ALERT1) violated/ORA-1405: fetched column value is NULL
(Doc ID 2523458.1)
Last updated on OCTOBER 23, 2019
Applies to:Oracle Database - Enterprise Edition - Version 184.108.40.206 and later
Information in this document applies to any platform.
Opening a PDB fails with the following errors:
ORA-00604: error occurred at recursive SQL level 1
ORA-00001: unique constraint (SYS.I_PDB_ALERT1) violated
The alert log showed an ORA-1405
APEX was upgraded. Although the product wouldn't necessarily need to be APEX, the issues reported for this error so far have been associated with having installed/upgraded APEX in a PDB. In this case, the failing SQL is 'select version from registry$ where status not in (9, 99) and namespace='SERVER' and cid='APEX', so APEX is the option causing the issue in the PDB.
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