Teradata validations: Error when validating NUMBER or DECIMAL with no precision/scale

[nehanene15]

When validating Teradata tables with schema NUMBER or DECIMAL with no precision or scale, DVT throws the following error:

File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/third_party/ibis/ibis_teradata/datatypes.py", line 58, in to_ibis
    return getattr(cls, to_ibis_func_name)(col_data, return_ibis_type=True)
  File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/third_party/ibis/ibis_teradata/datatypes.py", line 79, in to_ibis_from_N
    return cls.to_ibis_from_D(col_data, return_ibis_type=return_ibis_type)
  File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/third_party/ibis/ibis_teradata/datatypes.py", line 99, in to_ibis_from_D
    return dt.Decimal(precision, scale)
  File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/ibis/common/grounds.py", line 25, in __call__
    return cls.__create__(*args, **kwargs)
  File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/ibis/common/grounds.py", line 99, in __create__
    return super().__create__(**kwargs)
  File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/ibis/common/grounds.py", line 33, in __create__
    return type.__call__(cls, *args, **kwargs)
  File "/home/user/professional-services-data-validator/env/lib/python3.10/site-packages/ibis/expr/datatypes/core.py", line 588, in __init__
    raise ValueError('Decimal type precision cannot be negative')
ValueError: Decimal type precision cannot be negative

This happens on tables and views. The HELP COLUMN {qualified_name}.*; command used to determine table or view schema lists a precision and scale of -128 for the NUMBER data type, which throws this ValueError.