Function makeBin

src/jrd/SysFunction.cpp:1198–1235

void makeBin(DataTypeUtilBase*, const SysFunction* function, dsc* result,
	int argsCount, const dsc** args)
{
	fb_assert(argsCount >= function->minArgCount);

	bool isNullable = false;
	bool isNull = false;
	UCHAR t = dtype_long;

	for (int i = 0; i < argsCount; ++i)
	{
		if (args[i]->isNullable())
			isNullable = true;

		if (args[i]->isNull())
		{
			isNull = true;
			continue;
		}

		if (!args[i]->isExact() || args[i]->dsc_scale != 0)
		{
			status_exception::raise(
				Arg::Gds(isc_expression_eval_err) <<
				Arg::Gds(isc_sysf_argmustbe_exact) << Arg::Str(function->name));
		}

		if (args[i]->isExact())
			t = MAX(t, args[i]->dsc_dtype);
	}

	result->clear();
	result->dsc_dtype = t;
	result->dsc_length = type_lengths[t];
	result->setNullable(isNullable);
	if (isNull)
		result->setNull();
}


void makeBinShift(DataTypeUtilBase*, const SysFunction* function, dsc* result,