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

TCheckConstraint.CustomConstraint

User-defined constraint

Declaration

Source position: db.pas line 1094

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 TCheckConstraint.ErrorMessage

See also

TCheckConstraint.ErrorMessage

  

Message to display when the constraint is violated


Documentation generated on: Jun 23 2021