ExprLookup instances represent an access to a derived property
of a record in a foreign table.
Declaration Syntax| C# | Visual Basic | Visual C++ |
public class ExprLookup : IExpr, IQueryNode
Public Class ExprLookup _ Implements IExpr, IQueryNode
public ref class ExprLookup : IExpr, IQueryNode
Members| All Members | Constructors | Methods | Properties | ||
| Icon | Member | Description |
|---|---|---|
 | ExprLookupExprLookupNew(String, String, LookupList) |
Constructs a new ExprLookup.
|
| Equals(Object) | (Inherited from Object.) |
 | FieldName |
Gets and sets the the field name for this ExprLookup.
|
 | 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.) |
| 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.) |
| LookupList |
Gets and sets the LookupList for this ExprLookup.
|
| MemberwiseClone()() | Creates a shallow copy of the current Object. (Inherited from Object.) |
| TableName |
Gets and sets the table name for this ExprLookup.
|
| ToString()() |
Returns the string form of this ExprLookup.
(Overrides Object.ToString()().) |
| ToWire()() |
Returns the wire form of this ExprLookup.
|
| ValidateSyntax()() |
Validates the syntax of this ExprLookup.
|
RemarksMyTable[{expr1}, {expr2}].field is semantically correct if MyTable
is GROUPed by the same number of fields as the number of expressions
within brackets "[...]", and field is a derived property defined
on MyTable. Brackets with no expression list within represent access
to a table that is GROUPed to a single record.
Note that because the implicit tables NavStateRecords and AllBaseRecords are not GROUPED, it is not possible to do a lookup on these tables.
Inheritance Hierarchy| Object | |
 | ExprLookup |