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

TCheckConstraint.CustomConstraint

User-defined constraint

Declaration

Source position: db.pas line 977

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
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