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(*
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* IBX For Lazarus (Firebird Express)
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2015 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit Unit1;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, DbCtrls, db,
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IBArrayGrid, IBDatabase, IBQuery, IBCustomDataSet, IB;
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{$DEFINE LOCALDATABASE}
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const
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sDatabaseName = '2Dtest.fdb'; {If LOCALDATABASE defined then prepended with
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path to temp folder}
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{If you want to explicitly define the test database location then undefine
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LOCALDATABASE and set explicit path e.g.
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sDatabaseName = 'myserver:/databases/test.fdb';
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}
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type
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{ TForm1 }
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TForm1 = class(TForm)
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DataSource1: TDataSource;
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DBEdit1: TDBEdit;
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DBNavigator1: TDBNavigator;
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IBArrayGrid1: TIBArrayGrid;
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IBDatabase1: TIBDatabase;
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IBDataSet1: TIBDataSet;
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IBTransaction1: TIBTransaction;
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procedure FormCreate(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure IBDatabase1AfterConnect(Sender: TObject);
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procedure IBDatabase1CreateDatabase(Sender: TObject);
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private
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{ private declarations }
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public
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{ public declarations }
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end;
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var
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Form1: TForm1;
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implementation
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{$R *.lfm}
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{ TForm1 }
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procedure TForm1.FormShow(Sender: TObject);
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begin
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repeat
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try
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IBDatabase1.Connected := true;
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except
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on E:EIBClientError do
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begin
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Close;
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Exit
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end;
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On E:Exception do
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MessageDlg(E.Message,mtError,[mbOK],0);
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end;
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until IBDatabase1.Connected;
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end;
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procedure TForm1.FormCreate(Sender: TObject);
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begin
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{$IFNDEF LOCALDATABASE}
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IBDatabase1.DatabaseName := sDatabaseName
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{$ENDIF}
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end;
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procedure TForm1.IBDatabase1AfterConnect(Sender: TObject);
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begin
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IBDataSet1.Active := true;
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end;
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const
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sqlCreateTable =
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'Create Table TestData ('+
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'RowID Integer not null,'+
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'Title VarChar(32) Character Set UTF8,'+
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'MyArray VarChar(16) [0:16, -1:7] Character Set UTF8,'+
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'Primary Key(RowID)'+
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')';
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sqlCreateGenerator = 'Create Generator ROWNUMBER';
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sqlSetGenerator = 'Set Generator ROWNUMBER to ';
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sqlInsert = 'Insert into TestData(RowID,Title) Values(:RowID,:Title)';
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sqlUpdate = 'Update TestData Set MyArray = ? Where RowID = ?';
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procedure TForm1.IBDatabase1CreateDatabase(Sender: TObject);
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var Transaction: ITransaction;
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Statement: IStatement;
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ResultSet: IResultSet;
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row, i,j,k : integer;
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ar: IArray;
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c: char;
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begin
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with IBDatabase1.Attachment do
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begin
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ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_consistency],sqlCreateTable); {Create the table}
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ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_consistency],sqlCreateGenerator); {Create the table}
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{Now Populate it}
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Transaction := StartTransaction([isc_tpb_write,isc_tpb_nowait,isc_tpb_concurrency],taCommit);
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Statement := Prepare(Transaction,'Select * from TestData');
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for row := 1 to 3 do
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begin
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Statement := PrepareWithNamedParameters(Transaction,sqlInsert);
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with Statement.GetSQLParams do
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begin
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ByName('rowid').AsInteger := row;
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ByName('title').AsString := 'Row ' + IntToStr(row);
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end;
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Statement.Execute;
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Statement := Prepare(Transaction,sqlUpdate);
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if row > 2 then continue;
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ar := CreateArray(Transaction,'TestData','MyArray');
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if ar <> nil then
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begin
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k := 0;
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c := chr(ord('A') + row - 1);
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for i := 0 to 16 do
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for j := -1 to 7 do
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begin
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ar.SetAsString([i,j],c + IntToStr(k));
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Inc(k);
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end;
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Statement.SQLParams[0].AsArray := ar;
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Statement.SQLParams[1].AsInteger := row;
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Statement.Execute;
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end;
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end;
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ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_consistency],sqlSetGenerator + '4'); {update the generator}
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end;
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end;
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end.
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