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April 2025 Release Update for 19c causes failure connecting to MS SQL Server

in Gateways, Oracle Lite, Oracle DB Mob. Server, TimesTen (MOSC) 4 commentsAnswered

We just applied the most recent RU to our 19c database and now our database link to a MS SQL server is giving us this error when we try to do selects across the link:

ERROR at line 1:
ORA-00001: unique constraint (%s.%s) violated
ORA-02063: preceding line from DB_LINK

We're running Oracle 19.27.0.0 in a Linux 8 (x86_64) environment. I was able to confirm FreeTDS and ODBC are still working, logging in to the SQL Server with all 3 of the following on the Linux command line:

isql server domain\user 'password' -v

osql -I /usr/local -S server -U dnr\user -P password

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