ISQLComponents.From_

Syntax

From_: String;

Description

The From_ property determines a part of query where data source is specified.

Comments

If the property value was obtained in a separate variable and the expression is modified in the variable, then it is required to rewrite property value to apply changes:

Public Class SQLCallback: Object, ISQLCallback
    Sub BeforeConstruction(Components: ISQLComponents);
    Var
        From_: String;
    Begin
        From_ := Components.From_;
        //...
        //Modification of From_
        //...
        Components.From_ := From_;
    End Sub BeforeConstruction;

    Sub AfterConstruction(Var SQL: String);
    Begin
    End Sub AfterConstruction;
End Class SQLCallback;

Example

The example of use is given in description of the ISQLCallback.BeforeConstruction method.