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

TField.ImportedConstraint

Constraint for the field value on the level of the underlying database

Declaration

Source position: db.pas line 438

published property TField.ImportedConstraint : string
  read FImportedConstraint
  write FImportedConstraint;

Description

ImportedConstraint contains any constraints that the underlying data engine imposes on the values of a field (usually in an SQL CONSTRAINT) clause. Whether this field is filled with appropriate data depends on the implementation of the TDataset descendent.

See also

TField.CustomConstraint

  

Custom constraint for the field's value

TDataset

  

Base class for records-based data-access

TField.ConstraintErrorMessage

  

Message to display if the CustomConstraint constraint is violated.


Documentation generated on: Sep 28 2017