Oracle Error Message
PLW-06017: an operation will raise an exception
Reason for the Error
An operation near this location is certain to raise an exception during execution; it may be a programming error because it is not an explicit RAISE.
Solution
The compiler has determined that some operation near this location is certain to raise an exception during execution. This may be a programming error; consider rewriting the code. If the intention is to raise an exception, use an explicit RAISE statement.