public override object Subtract(object a, object b, SqlType aType, SqlType otherType)
{
if ((a == null) || (b == null))
{
return(null);
}
switch (base.TypeCode)
{
case 0x65:
case 0x66:
case 0x6b:
{
IntervalMonthData data = a as IntervalMonthData;
IntervalMonthData data2 = b as IntervalMonthData;
if ((data == null) || (data2 == null))
{
TimestampData data3 = a as TimestampData;
TimestampData data4 = b as TimestampData;
if ((data3 == null) || (data4 == null))
{
throw Error.RuntimeError(0xc9, "IntervalType");
}
bool isYear = base.TypeCode == 0x65;
return(new IntervalMonthData((long)DateTimeType.SubtractMonths(data3, data4, isYear), this));
}
return(new IntervalMonthData(data.Units - data2.Units, this));
}
case 0x67:
case 0x68:
case 0x69:
case 0x6a:
case 0x6c:
case 0x6d:
case 110:
case 0x6f:
case 0x70:
case 0x71:
{
IntervalSecondData data5 = a as IntervalSecondData;
IntervalSecondData data6 = b as IntervalSecondData;
if ((data5 == null) || (data6 == null))
{
TimeData data7 = a as TimeData;
TimeData data8 = b as TimeData;
if ((data7 != null) && (data8 != null))
{
long num4 = data7.GetSeconds() - data8.GetSeconds();
return(new IntervalSecondData(num4, data7.GetNanos() - data8.GetNanos(), this, true));
}
TimestampData data9 = a as TimestampData;
TimestampData data10 = b as TimestampData;
if ((data9 != null) && (data10 != null))
{
long num6 = data9.GetSeconds() - data10.GetSeconds();
return(new IntervalSecondData(num6, data9.GetNanos() - data10.GetNanos(), this, true));
}
break;
}
long seconds = data5.Units - data6.Units;
return(new IntervalSecondData(seconds, data5.Nanos - data6.Nanos, this, true));
}
}
throw Error.RuntimeError(0xc9, "IntervalType");
}
