SQL error “ORA-01722: invalid number”

Question

A very easy one for someone, The following insert is giving me the

ORA-01722: invalid number

why?

INSERT INTO C         


        

Answer 1

In my case the conversion error was in functional based index, that I had created for the table.

The data being inserted was OK. It took me a while to figure out that the actual error came from the buggy index.

Would be nice, if Oracle could have gave more precise error message in this case.