Data.DB.TCheckConstraint.CustomConstraint
Delphi
property CustomConstraint: string read FCustomConstraint write SetCustomConstraint;
C++
__property System::UnicodeString CustomConstraint = {read=FCustomConstraint, write=SetCustomConstraint};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | published | Data.DB.pas Data.DB.hpp |
Data.DB | TCheckConstraint |
Description
Contains the SQL text representation of a constraint defined on a record by an application.
Use CustomConstraint to store the SQL text that defines a check constraint defined by the application for a dataset component. Custom constraints are local to the application and do not get applied by the server when an application writes its changes to a database.
Note: Custom constraints are SQL expressions. Because of this, always use a period (.) as a floating-point separator. This may be inconsistent with international Windows settings.