TSqlNull
Inheritance
| Level | Ancestor | Description |
|---|---|---|
| 1 | TObject | Ultimate ancestor in a class hierarchy |
| 2 | TBaseObject | A base class for objects that can be used instead of TObject. |
| 3 | TReferenceCountedObject | Object that keeps track of the number of times it is referenced from other objects |
| 4 | TSqlExpression | Base class for expressions in an SQL expression tree. |
| 5 | TSqlSimpleOperandExpression | |
| 6 | TSqlNull |
Source
Sql.Expression.pas (55)
Methods
| Scope | Visibility | Result | Name | Description |
|---|---|---|---|---|
| Instance | public | TType | GetType() | |
| Instance | public | TSqlExpression | Copy() | |
| Instance | public | TSqlNull | CopyNull() |