IDtOleDbProvider.Query

Syntax

Query: String

Description

The Query property determines tables query stored in data provider. Imported data is selected using the query.

Example

Executing the example requires that the repository contains an ETL task with the Etl identifier, and an Access database file named db.mdb in the disk C root directory. There is a table named Table_1 in the database.

Sub Main;

Var

MB: IMetabase;

MObj: IMetabaseObject;

EtlTask: IEtlTask;

EtlProvider: IEtlPlainDataProvider;

OleDbProvider: IDtOleDbProvider;

WxProvider: IWxRectangle;

WxETLProvider: IWxETLObject;

Begin

MB := MetabaseClass.Active;

//ETL task search. Repository object with the ETL identifier

MObj := MB.ItemById("Etl").Edit;

EtlTask := MObj As IEtlTask;

//Start of the provider creation

//The Import From OleDb object creation

EtlProvider := EtlTask.Create(EtlObjectType.PlainDataOleDbProvider) As IEtlPlainDataProvider;

EtlProvider := EtlProvider.Edit;

EtlProvider.Id := "OleDb_Provider";

EtlProvider.Name := "Import from OleDb";

EtlProvider.Description := "Import from OleDb";

//Set up data provider

OleDbProvider := EtlProvider.Provider As IDtOleDbProvider;

OleDbProvider.ConnectionString := "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\db.mdb;Persist Security Info=False";

OleDbProvider.Query := "Select * from Table_1";

EtlProvider.FillDefault;

//Save provider

EtlProvider.Save;

//End of provider creation

//Start of visual object creation

WxProvider := EtlTask.Workspace.CreateRectangle;

WxETLProvider := New WxETLObject.Create;

WxETLProvider.ETLObject := EtlProvider;

WxProvider.Style.TextPosition := WxTextPosition.Bottom;

WxProvider.Style.PictureMarginTop := -10;

WxProvider.PinPosition := New GxPointF.Create(50, 50);

WxProvider.Extension := WxETLProvider As IWxShapeExtension;

//End of visual object creation

//Save Etl task

MObj.Save;

End Sub Main;

After executing the example the Import from OleDb object is created in the ETL task. The provider extracts data from the table Table_1, that is stored in Access db.mdb database.