Function setFixedSubType

src/dsql/ExprNodes.cpp:643–658

{

bool setFixedSubType(dsc* to, const dsc& from1, const dsc& from2)
{
	if (!to->isExact())
		return false;

	if (from1.isExact() && from2.isExact())
		to->dsc_sub_type = MAX(from1.dsc_sub_type, from2.dsc_sub_type);
	else if (from1.isExact())
		to->dsc_sub_type = from1.dsc_sub_type;
	else if (from2.isExact())
		to->dsc_sub_type = from2.dsc_sub_type;
	else
		to->dsc_sub_type = 0;

	return true;
}

const UCHAR DSC_ZTYPE_FLT64 = 0;
const UCHAR DSC_ZTYPE_FLT128 = 1;