An incorrect specification of a Decimal datatype should spit out a meaningful error message.

[localhost:21000] > select cast(0.1 as Decimal(2,3));
Query: select cast(0.1 as Decimal(2,3))
ERROR: AnalysisException: Decimal scale (3) must be <= precision (2).

[localhost:21000] > select cast(0.1 as Decimal(2,-2));
Query: select cast(0.1 as Decimal(2,-2))
ERROR: AnalysisException: Syntax error in line 1:
select cast(0.1 as Decimal(2,-2))
                             ^
Encountered: -
Expected

CAUSED BY: Exception: Syntax error