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Teradata.Client.Provider
Equality Operator (TdPeriodDate)
Example 



Teradata.Client.Provider Namespace > TdPeriodDate Structure : Equality Operator
An instance of TdPeriodDate.
An instance of TdPeriodDate.
Compares two TdPeriodDate structures to determine whether the left operand is equal to the right operand.
Syntax
'Declaration
 
Public Operator =( _
   ByVal left As TdPeriodDate, _
   ByVal right As TdPeriodDate _
) As Boolean
'Usage
 
public bool operator ==( 
   TdPeriodDate left,
   TdPeriodDate right
)
public:
bool operator ==( 
   TdPeriodDate left,
   TdPeriodDate right
)

Parameters

left
An instance of TdPeriodDate.
right
An instance of TdPeriodDate.

Return Value

A boolean is returned that indicates the result of the comparison.
Remarks

The beginning and ending bounds between the left and right operands are compared to determine whether two periods are equal. The two periods are equal if the following is true:

    left.Begin == right.Begin && left.End == right.Begin

The value returned is true if the left is equal to the right, false otherwise.

Return Value Description
true

left and right are TdPeriodDate.Null

-or-

left is equal to right.

false

left or right is Null

-or-

left is not equal to right.

Unlike comparison operators, Equality operators do not always return false when left and right operands are Null. Therefore the reverse condition can be considered true. TdDate implementation is very similar to the Nullable class in this regard.

Example
The following example shows that the Equality operator can safely be used in an if statement.
TdPeriodDate x = TdPeriodDate.Null;
TdPeriodDate y = new TdPeriodDate(new TdDate(2008, 10, 10), new TdDate(2008, 11, 30));
            
if (x == y)
{
    // x is equal to y.
    Console.WriteLine(@"X is equal to Y").
}
else
{
    // x is not equal y
    Console.WriteLine(@"X is not equal to Y").
}
            
y = TdPeriodDate.Null;
            
if (x == y)
{
    // x is equal to y.
    Console.WriteLine(@"X is equal to Y").
}
else
{
    // x is not equal y
    Console.WriteLine(@"X is not equal to Y").
}
Requirements

Target Platforms: Windows 8.1, Windows 10, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019

See Also

Reference

TdPeriodDate Structure
TdPeriodDate Members