sql_io.py: put_table(): ignore_cond(): Added support for constraints that did not fail at least once, and therefore should not be required to simplify to a non-false value. As part of this, only track the failed constraint in the errors table if it actually failed at least once based on the deleted row count or the `failed` param.
sql_io.py: put_table(): ignore_cond(): Added support for constraints that did not fail at least once, and therefore should not be required to simplify to a non-false value. As part of this, only track the failed constraint in the errors table if it actually failed at least once based on the deleted row count or the `failed` param.