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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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|
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unit Unit1; |
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|
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{$mode objfpc}{$H+} |
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|
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interface |
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|
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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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|
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{$DEFINE LOCALDATABASE} |
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|
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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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|
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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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|
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sDatabaseName = 'myserver:/databases/test.fdb'; |
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} |
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|
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type |
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|
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{ TForm1 } |
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|
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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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|
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var |
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Form1: TForm1; |
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|
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implementation |
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|
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{$R *.lfm} |
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|
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{ TForm1 } |
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|
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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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|
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procedure TForm1.FormCreate(Sender: TObject); |
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begin |
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{$IFDEF LOCALDATABASE} |
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IBDatabase1.DatabaseName := GetTempDir + sDatabaseName |
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{$else} |
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IBDatabase1.DatabaseName := sDatabaseName |
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{$ENDIF} |
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end; |
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|
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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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|
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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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|
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sqlCreateGenerator = 'Create Generator ROWNUMBER'; |
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sqlSetGenerator = 'Set Generator ROWNUMBER to '; |
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|
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sqlInsert = 'Insert into TestData(RowID,Title) Values(:RowID,:Title)'; |
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|
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sqlUpdate = 'Update TestData Set MyArray = ? Where RowID = ?'; |
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|
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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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|
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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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|
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end. |
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|
