Function makeLeftRight

src/jrd/SysFunction.cpp:1619–1645

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

	const dsc* value = args[0];
	const dsc* length = args[1];

	if (value->isNull() || length->isNull())
	{
		result->makeNullString();
		return;
	}

	if (value->isBlob())
		result->makeBlob(value->getBlobSubType(), value->getTextType());
	else
	{
		result->clear();
		result->dsc_dtype = dtype_varying;
		result->setTextType(value->getTextType());
		result->setNullable(value->isNullable() || length->isNullable());

		result->dsc_length = dataTypeUtil->fixLength(result,
			dataTypeUtil->convertLength(value, result)) + static_cast<USHORT>(sizeof(USHORT));
	}
}


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