Oracle Error Message
ORA-06571: Function string does not guarantee not to update database
Reason for the Error
There are two possible causes for this message:
* A SQL statement references a packaged, PL/SQL function that does not contain a pragma that prevents the database from being updated.
* A SQL statement references a stand-alone, PL/SQL function that contains an instruction to update the database.
Solution
If the referenced function is a packaged, PL/SQL function: Recreate the PL/SQL function with the required pragma; be certain to include the ‘Write No Database State’ (WNDS) argument in the argument list of the pragma. If the referenced function is a stand-alone, PL/SQL function: Do not use the function.