public void LessThan()
{
SqlInt32 x;
SqlInt32 y;
// Case 1: either is SqlInt32.Null
x = SqlInt32.Null;
y = new SqlInt32(5);
Assert.AreEqual(x < y, SqlBoolean.Null, "Less Than operator didn't return Null when one was Null.");
Assert.AreEqual(SqlInt32.LessThan(x, y), SqlBoolean.Null, "Less Than function didn't return Null when one was Null.");
// Case 2: both are SqlInt32.Null
y = SqlInt32.Null;
Assert.AreEqual(x < y, SqlBoolean.Null, "Less Than operator didn't return Null when both were Null.");
Assert.AreEqual(SqlInt32.LessThan(x, y), SqlBoolean.Null, "Less Than function didn't return Null when both were Null.");
// Case 3: x > y
x = new SqlInt32(5);
y = new SqlInt32(4);
Assert.AreEqual(x < y, SqlBoolean.False, "Less than operator didn't return false when x > y.");
Assert.AreEqual(SqlInt32.LessThan(x, y), SqlBoolean.False, "Less than function didn't return false when x > y.");
// Case 4: x < y
x = new SqlInt32(5);
y = new SqlInt32(6);
Assert.AreEqual(x < y, SqlBoolean.True, "Less than operator didn't return true when x < y.");
Assert.AreEqual(SqlInt32.LessThan(x, y), SqlBoolean.True, "Less than function didn't return true when x < y.");
}
public void LessThan()
{
SqlInt32 x;
SqlInt32 y;
// Case 1: either is SqlInt32.Null
x = SqlInt32.Null;
y = new SqlInt32(5);
Assert.Equal(x < y, SqlBoolean.Null);
Assert.Equal(SqlInt32.LessThan(x, y), SqlBoolean.Null);
// Case 2: both are SqlInt32.Null
y = SqlInt32.Null;
Assert.Equal(x < y, SqlBoolean.Null);
Assert.Equal(SqlInt32.LessThan(x, y), SqlBoolean.Null);
// Case 3: x > y
x = new SqlInt32(5);
y = new SqlInt32(4);
Assert.Equal(x < y, SqlBoolean.False);
Assert.Equal(SqlInt32.LessThan(x, y), SqlBoolean.False);
// Case 4: x < y
x = new SqlInt32(5);
y = new SqlInt32(6);
Assert.Equal(x < y, SqlBoolean.True);
Assert.Equal(SqlInt32.LessThan(x, y), SqlBoolean.True);
}
public override object Aggregate(int[] records, AggregateType kind)
{
bool hasData = false;
try
{
switch (kind)
{
case AggregateType.Sum:
SqlInt64 sum = 0;
foreach (int record in records)
{
if (IsNull(record))
{
continue;
}
checked { sum += _values[record]; }
hasData = true;
}
if (hasData)
{
return(sum);
}
return(_nullValue);
case AggregateType.Mean:
SqlInt64 meanSum = 0;
int meanCount = 0;
foreach (int record in records)
{
if (IsNull(record))
{
continue;
}
checked { meanSum += (_values[record]).ToSqlInt64(); }
meanCount++;
hasData = true;
}
if (hasData)
{
SqlInt32 mean = 0;
checked { mean = (meanSum / meanCount).ToSqlInt32(); }
return(mean);
}
return(_nullValue);
case AggregateType.Var:
case AggregateType.StDev:
int count = 0;
SqlDouble var = 0;
SqlDouble prec = 0;
SqlDouble dsum = 0;
SqlDouble sqrsum = 0;
foreach (int record in records)
{
if (IsNull(record))
{
continue;
}
dsum += (_values[record]).ToSqlDouble();
sqrsum += (_values[record]).ToSqlDouble() * (_values[record]).ToSqlDouble();
count++;
}
if (count > 1)
{
var = count * sqrsum - (dsum * dsum);
prec = var / (dsum * dsum);
// we are dealing with the risk of a cancellation error
// double is guaranteed only for 15 digits so a difference
// with a result less than 1e-15 should be considered as zero
if ((prec < 1e-15) || (var < 0))
{
var = 0;
}
else
{
var /= (count * (count - 1));
}
if (kind == AggregateType.StDev)
{
return(Math.Sqrt(var.Value));
}
return(var);
}
return(_nullValue);
case AggregateType.Min:
SqlInt32 min = SqlInt32.MaxValue;
for (int i = 0; i < records.Length; i++)
{
int record = records[i];
if (IsNull(record))
{
continue;
}
if ((SqlInt32.LessThan(_values[record], min)).IsTrue)
{
min = _values[record];
}
hasData = true;
}
if (hasData)
{
return(min);
}
return(_nullValue);
case AggregateType.Max:
SqlInt32 max = SqlInt32.MinValue;
for (int i = 0; i < records.Length; i++)
{
int record = records[i];
if (IsNull(record))
{
continue;
}
if ((SqlInt32.GreaterThan(_values[record], max)).IsTrue)
{
max = _values[record];
}
hasData = true;
}
if (hasData)
{
return(max);
}
return(_nullValue);
case AggregateType.First: // Does not seem to be implemented
if (records.Length > 0)
{
return(_values[records[0]]);
}
return(null !);
case AggregateType.Count:
count = 0;
for (int i = 0; i < records.Length; i++)
{
if (!IsNull(records[i]))
{
count++;
}
}
return(count);
}
}
catch (OverflowException)
{
throw ExprException.Overflow(typeof(SqlInt32));
}
throw ExceptionBuilder.AggregateException(kind, _dataType);
}
public override object Aggregate(int[] records, AggregateType kind)
{
bool flag = false;
try
{
int num;
SqlDouble num2;
SqlDouble num3;
int num4;
int num5;
int num6;
int num7;
int num8;
int num9;
int num10;
int num11;
SqlInt32 minValue;
int num13;
SqlInt32 maxValue;
SqlDouble num15;
int num16;
SqlInt64 num17;
SqlInt64 num18;
int[] numArray;
SqlDouble num19;
int num21;
int[] numArray2;
int num22;
int[] numArray3;
switch (kind)
{
case AggregateType.Sum:
num18 = 0L;
numArray3 = records;
num10 = 0;
goto Label_007D;
case AggregateType.Mean:
num17 = 0L;
num16 = 0;
numArray2 = records;
num9 = 0;
goto Label_00EF;
case AggregateType.Min:
maxValue = SqlInt32.MaxValue;
num6 = 0;
goto Label_0313;
case AggregateType.Max:
minValue = SqlInt32.MinValue;
num5 = 0;
goto Label_0392;
case AggregateType.First:
if (records.Length <= 0)
{
return(null);
}
return(this.values[records[0]]);
case AggregateType.Count:
num = 0;
num4 = 0;
goto Label_03F7;
case AggregateType.Var:
case AggregateType.StDev:
num = 0;
num2 = 0.0;
num19 = 0.0;
num3 = 0.0;
num15 = 0.0;
numArray = records;
num8 = 0;
goto Label_01E6;
default:
goto Label_041C;
}
Label_0044:
num22 = numArray3[num10];
if (!this.IsNull(num22))
{
num18 += this.values[num22];
flag = true;
}
num10++;
Label_007D:
if (num10 < numArray3.Length)
{
goto Label_0044;
}
if (flag)
{
return(num18);
}
return(base.NullValue);
Label_00B5:
num21 = numArray2[num9];
if (!this.IsNull(num21))
{
num17 += this.values[num21].ToSqlInt64();
num16++;
flag = true;
}
num9++;
Label_00EF:
if (num9 < numArray2.Length)
{
goto Label_00B5;
}
if (flag)
{
SqlInt64 num23 = num17 / ((long)num16);
return(num23.ToSqlInt32());
}
return(base.NullValue);
Label_017E:
num7 = numArray[num8];
if (!this.IsNull(num7))
{
num3 += this.values[num7].ToSqlDouble();
num15 += this.values[num7].ToSqlDouble() * this.values[num7].ToSqlDouble();
num++;
}
num8++;
Label_01E6:
if (num8 < numArray.Length)
{
goto Label_017E;
}
if (num <= 1)
{
return(base.NullValue);
}
num2 = ((SqlDouble)(num * num15)) - (num3 * num3);
num19 = num2 / (num3 * num3);
bool x = num19 < 1E-15;
if (!SqlBoolean.op_True(x))
{
}
if (SqlBoolean.op_True(x | (num2 < 0.0)))
{
num2 = 0.0;
}
else
{
num2 /= (double)(num * (num - 1));
}
if (kind == AggregateType.StDev)
{
return(Math.Sqrt(num2.Value));
}
return(num2);
Label_02C3:
num13 = records[num6];
if (!this.IsNull(num13))
{
if (SqlInt32.LessThan(this.values[num13], maxValue).IsTrue)
{
maxValue = this.values[num13];
}
flag = true;
}
num6++;
Label_0313:
if (num6 < records.Length)
{
goto Label_02C3;
}
if (flag)
{
return(maxValue);
}
return(base.NullValue);
Label_0342:
num11 = records[num5];
if (!this.IsNull(num11))
{
if (SqlInt32.GreaterThan(this.values[num11], minValue).IsTrue)
{
minValue = this.values[num11];
}
flag = true;
}
num5++;
Label_0392:
if (num5 < records.Length)
{
goto Label_0342;
}
if (flag)
{
return(minValue);
}
return(base.NullValue);
Label_03E1:
if (!this.IsNull(records[num4]))
{
num++;
}
num4++;
Label_03F7:
if (num4 < records.Length)
{
goto Label_03E1;
}
return(num);
}
catch (OverflowException)
{
throw ExprException.Overflow(typeof(SqlInt32));
}
Label_041C:
throw ExceptionBuilder.AggregateException(kind, base.DataType);
}
