TCheckConstraint.CustomConstraint¶
User-defined constraint.
Declaration¶
Source position: db.pas line 1305
published property CustomConstraint: string;
Description¶
CustomConstraint is an SQL expression with an additional user-defined constraint. The expression should be enforced by a TDataset descendent when data is posted to the dataset. If the constraint is violated, then the dataset should raise an exception, with message as specified in TCheckConstraint.ErrorMessage
See also¶
| Name | Description |
|---|---|
| TCheckConstraint.ErrorMessage | Message to display when the constraint is violated. |