Unused since a8a81aae.

Also updated the autodetector to assume the RenameField operation will
perform the required repointing.

This allows field and special operations to use this logic.

Fixed #28117 -- Added a helpful message in loaddata when psycopg2 can't load a fixture due to NUL characters.

Used Decimal.scaleb() in backends.utils.format_number() and DecimalField.widget_attrs() to improve performance.

Follow up to ad9390bb.

See https://docs.python.org/3/library/sqlite3.html#default-adapters-and-converters.

As of e62165b8, {% include %}
doesn't silence exceptions.

Thanks Gabriel for the report and Adam Johnson for the review.

This provides additional test coverage but isn't a regression test for
the ticket's issue.

Thanks Tim Graham for the review.

Fixed #28944 -- Fixed crash when chaining values()/values_list() after QuerySet.select_for_update(of=()).

Otherwise it generates invalid SQL.