django oracle backend wildcard issue

[Terence Collins]

in django/db/backends/oracle/base.py, in _fix_for_params, line 542:

query %= args

will cause an error if the passed in string using an SQL wildcard, i.e. "custom_value like '%custom_value%'.
This can be avoided by escaping the "%" as "%%", but as this is an underlying function the resultant error can be hard to track down.

[Tim Graham]

Can you give a concrete example of how to reproduce the problem? It sounds like you're writing raw SQL and not escaping it correctly. You recognize that this is your fault but ask if Django could raise a more helpful message. (Please tell me if I misinterpreted.)

[Sarah Boyce]

(We can reopen when we have more details to replicate)