Data.DB.TCheckConstraint.CustomConstraint

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[–] Properties Type: property Visibility: published Source:

Data.DB.pas

Data.DB.hpp

Unit: Data.DB Parent: TCheckConstraint

Delphi

property CustomConstraint: string read FCustomConstraint write SetCustomConstraint;

C++

__property System::UnicodeString CustomConstraint = {read=FCustomConstraint, write=SetCustomConstraint};

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.

See Also

• FromDictionary

• ImportedConstraint

• Constraining Data Values