[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'db' (#fcl)

TCheckConstraint.CustomConstraint

User-defined constraint

Declaration

Source position: db.pas line 983

published property TCheckConstraint.CustomConstraint: String
  read FCustomConstraint
  write FCustomConstraint;

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 TCustomConstraint.ErrorMessage

See also

TCustomConstraint.ErrorMessage


Documentation generated on: Jan 04 2012