static DataTypePtr createExect(const ASTPtr & arguments)
{
if (!arguments || arguments->children.size() != 1)
throw Exception("Decimal data type family must have exactly two arguments: precision and scale",
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
const ASTLiteral * scale_arg = typeid_cast<const ASTLiteral *>(arguments->children[0].get());
if (!scale_arg || !(scale_arg->value.getType() == Field::Types::Int64 || scale_arg->value.getType() == Field::Types::UInt64))
throw Exception("Decimal data type family must have a two numbers as its arguments", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
UInt64 precision = maxDecimalPrecision<T>();
UInt64 scale = scale_arg->value.get<UInt64>();
return createDecimal(precision, scale);
}
static DataTypePtr create(const ASTPtr & arguments)
{
if (!arguments || arguments->children.size() != 2)
throw Exception("Decimal data type family must have exactly two arguments: precision and scale",
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
const auto * precision = arguments->children[0]->as<ASTLiteral>();
const auto * scale = arguments->children[1]->as<ASTLiteral>();
if (!precision || precision->value.getType() != Field::Types::UInt64 ||
!scale || !(scale->value.getType() == Field::Types::Int64 || scale->value.getType() == Field::Types::UInt64))
throw Exception("Decimal data type family must have a two numbers as its arguments", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
UInt64 precision_value = precision->value.get<UInt64>();
UInt64 scale_value = scale->value.get<UInt64>();
return createDecimal(precision_value, scale_value);
}