CoalesceList instances represent a list of expressions used
to return the the first non-null value in the list.
These coalesce expressions are objects of type IExpr.
Declaration Syntax| C# | Visual Basic | Visual C++ |
public class CoalesceList : IObjectList, IQueryNode
Public Class CoalesceList _ Implements IObjectList, IQueryNode
public ref class CoalesceList : IObjectList, IQueryNode
Members| All Members | Constructors | Methods | |||
| Icon | Member | Description |
|---|---|---|
 | CoalesceListCoalesceListNew()() |
Constructs a new, empty CoalesceList.
|
| Add(Object) |
Appends a coalesce expression to the end of the collection.
|
| Equals(Object) | (Inherited from Object.) |
 | Finalize()() | Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.) |
| Get(Int32) |
Gets the coalesce expression (an IExpr object) from the CoalesceList.
|
| GetHashCode()() | Serves as a hash function for a particular type. GetHashCode()() is suitable for use in hashing algorithms and data structures like a hash table. (Inherited from Object.) |
| GetType()() | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone()() | Creates a shallow copy of the current Object. (Inherited from Object.) |
| Remove(Int32) |
Removes a coalesce expression (an IExpr object) from the CoalesceList.
|
| Size()() |
Returns the number of coalesce expressions in this CoalesceList.
|
| ToString()() |
Returns the string form of this CoalesceList.
(Overrides Object.ToString()().) |
| ToWire()() |
Returns the wire form of this CoalesceList.
|
| ValidateSyntax()() |
Validates the syntax of this CoalesceList.
|
Remarks
Coalesce expressions provide the ability to evalute records for multiple
values and return the first non-null value encountered, in the order specified.
The CoalesceList saves the expressions in the form of a list, in the same order
as specified in the query.
Inheritance Hierarchy| Object | |
 | CoalesceList |