Data.DB.TIndexDef.Expression
Delphi
property Expression: string read GetExpression write SetExpression;
C++
__property System::UnicodeString Expression = {read=GetExpression, write=SetExpression};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | published | Data.DB.pas Data.DB.hpp |
Data.DB | TIndexDef |
Description
Contains a dBASE key expression.
Read Expression to learn the key expression of a dBASE expression index. This property is only used on the Windows product, where there are components that can represent dBASE tables.
A key expression for a dBASE table is a field name, or a combination of field names, functions, and operators that specifies how the index orders records in the table. If the table is not a dBASE table or the index is not an expression index, Expression is an empty string and the Fields property contains the field(s) for the index. When the index is a dBASE expression index, Expression contains a value and the Fields property contains an empty string.
Note: For more information about key expressions, see your dBASE documentation.