trunk/runtime/IBQuery.pas

{************************************************************************}
{                                                                        }
{       Borland Delphi Visual Component Library                          }
{       InterBase Express core components                                }
{                                                                        }
{       Copyright (c) 1998-2000 Inprise Corporation                      }
{                                                                        }
{    InterBase Express is based in part on the product                   }
{    Free IB Components, written by Gregory H. Deatz for                 }
{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
{    Free IB Components is used under license.                           }
{                                                                        }
{    The contents of this file are subject to the InterBase              }
{    Public License Version 1.0 (the "License"); you may not             }
{    use this file except in compliance with the License. You            }
{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
{    Software distributed under the License is distributed on            }
{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
{    express or implied. See the License for the specific language       }
{    governing rights and limitations under the License.                 }
{    The Original Code was created by InterBase Software Corporation     }
{       and its successors.                                              }
{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
{       Corporation. All Rights Reserved.                                }
{    Contributor(s): Jeff Overcash                                       }
{                                                                        }
{    IBX For Lazarus (Firebird Express)                                  }
{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
{    Portions created by MWA Software are copyright McCallum Whyman      }
{    Associates Ltd 2011                                                 }
{                                                                        }
{************************************************************************}

unit IBQuery;

interface

{$Mode Delphi}

uses
{$IFDEF WINDOWS }
  Windows,
{$ELSE}
  unix,
{$ENDIF}
 SysUtils, Classes,  Db,
     IBHeader, IB, IBCustomDataSet, IBSQL, IBSQLParser;

type

{ TIBQuery }

  TIBQuery = class(TIBParserDataSet)
  private
    FSQL: TStrings;
    FPrepared: Boolean;
    FParams: TParams;
    FText: string;
    FSQLUpdating: boolean;
    FInQueryChanged: boolean;
    function GetRowsAffected: Integer;
    procedure PrepareSQL;
    procedure QueryChanged(Sender: TObject);
    procedure ReadParamData(Reader: TReader);
    procedure SetQuery(Value: TStrings);
    procedure SetParamsList(Value: TParams);
    procedure SetParams;
    procedure SetParamsFromCursor;
    procedure SetPrepared(Value: Boolean);
    procedure SetPrepare(Value: Boolean);
    procedure WriteParamData(Writer: TWriter);
    function GetStmtHandle: IStatement;
    procedure UpdateSQL;

  protected
    { IProviderSupport }
(*    procedure PSExecute; override;
    function PSGetParams: TParams; override;
    function PSGetTableName: string; override;
    procedure PSSetCommandText(const CommandText: string); override;
    procedure PSSetParams(AParams: TParams); override;  *)

    procedure DefineProperties(Filer: TFiler); override;
    procedure InitFieldDefs; override;
    procedure InternalOpen; override;
    procedure Disconnect; override;
    function GetParamsCount: Word;
    function GenerateQueryForLiveUpdate : Boolean;
    procedure SetFiltered(Value: Boolean); override;
    procedure SQLChanged(Sender: TObject); override;
    procedure SQLChanging(Sender: TObject); override;

  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure BatchInput(InputObject: TIBBatchInput);
    procedure BatchOutput(OutputObject: TIBBatchOutput);
    procedure ExecSQL;
    procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
    function ParamByName(const Value: string): TParam;
    procedure Prepare;
    procedure UnPrepare;
    procedure ResetParser; override;
    property Prepared: Boolean read FPrepared write SetPrepare;
    property ParamCount: Word read GetParamsCount;
    property StmtHandle: IStatement read GetStmtHandle;
    property StatementType;
    property Text: string read FText;
    property RowsAffected: Integer read GetRowsAffected;
 //   property Params: TParams read FParams write SetParamsList;
    property BaseSQLSelect;

  published
    property Active;
    property AutoCommit;
    property BufferChunks;
    property CachedUpdates;
    property DataSource read GetDataSource write SetDataSource;
    property GenerateParamNames;
 //   property Constraints stored ConstraintsStored;
    property GeneratorField;
    property ParamCheck;
    property SQL: TStrings read FSQL write SetQuery;
    property Params: TParams read FParams write SetParamsList;
    property UniDirectional default False;
    property UpdateObject;
    property Filtered;
    property DataSetCloseAction;

    property BeforeDatabaseDisconnect;
    property AfterDatabaseDisconnect;
    property DatabaseFree;
    property BeforeTransactionEnd;
    property AfterTransactionEnd;
    property TransactionFree;
    property OnFilterRecord;
    property OnValidatePost;
end;

implementation

uses FBMessages;

{ TIBQuery }

constructor TIBQuery.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FSQL := TStringList.Create;
  TStringList(SQL).OnChange := QueryChanged;
  FParams := TParams.Create(Self);
  ParamCheck := True;
end;

destructor TIBQuery.Destroy;
begin
  Destroying;
  Disconnect;
  SQL.Free;
  FParams.Free;
  inherited Destroy;
end;

procedure TIBQuery.InitFieldDefs;
begin
  inherited InitFieldDefs;
end;

procedure TIBQuery.InternalOpen;
begin
  ActivateConnection();
  ActivateTransaction;
  QSelect.GenerateParamNames := GenerateParamNames;
  SetPrepared(True);
  if DataSource <> nil then
    SetParamsFromCursor;
  SetParams;
  inherited InternalOpen;
end;

procedure TIBQuery.Disconnect;
begin
  Close;
  UnPrepare;
end;

procedure TIBQuery.SetPrepare(Value: Boolean);
begin
  if Value then
    Prepare
  else
    UnPrepare;
end;

procedure TIBQuery.Prepare;
begin
  SetPrepared(True);
end;

procedure TIBQuery.UnPrepare;
begin
  SetPrepared(False);
end;

procedure TIBQuery.ResetParser;
begin
  inherited ResetParser;
  UpdateSQL;
end;

procedure TIBQuery.SetQuery(Value: TStrings);
begin
  if SQL.Text <> Value.Text then
  begin
    Disconnect;
    SQL.BeginUpdate;
    try
      SQL.Assign(Value);
    finally
      SQL.EndUpdate;
    end;
  end;
end;

procedure TIBQuery.QueryChanged(Sender: TObject);
begin
  if FInQueryChanged then Exit;
  FInQueryChanged := true;
  try
    if not (csReading in ComponentState) then
    begin
      Disconnect;
      if csDesigning in ComponentState then
        FText := FParams.ParseSQL(SQL.Text, true)
      else
        FText := SQL.Text;
      DataEvent(dePropertyChange, 0);
    end else
      FText := FParams.ParseSQL(SQL.Text, true);

    if not FSQLUpdating then
    begin
      Prepared := false;
      SelectSQL.Assign(SQL);
    end;
  finally
    FInQueryChanged := false;
  end;
end;

procedure TIBQuery.SetParamsList(Value: TParams);
begin
  FParams.AssignValues(Value);
end;

function TIBQuery.GetParamsCount: Word;
begin
  Result := FParams.Count;
end;

procedure TIBQuery.DefineProperties(Filer: TFiler);

  function WriteData: Boolean;
  begin
  {The following results in a stream read error with nested frames. Hence commented out until
   someone fixes the LCL }
{    if Filer.Ancestor <> nil then
      Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
      Result := FParams.Count > 0;
  end;

begin
  inherited DefineProperties(Filer);
  Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
end;


procedure TIBQuery.ReadParamData(Reader: TReader);
begin
  FParams.Clear;
  Reader.ReadValue;
  Reader.ReadCollection(FParams);
end;

procedure TIBQuery.WriteParamData(Writer: TWriter);
begin
  Writer.WriteCollection(Params);
end;

procedure TIBQuery.SetPrepared(Value: Boolean);
begin
  CheckDatasetClosed;
  if Value <> Prepared then
  begin
    if Value then
    begin
      if Length(Text) > 1 then PrepareSQL
      else IBError(ibxeEmptySQLStatement, [nil]);
    end
    else
    begin
      InternalUnPrepare;
      FParams.Clear;
    end;
    FPrepared := Value;
  end;
end;

procedure TIBQuery.SetParamsFromCursor;
var
  I: Integer;
  DataSet: TDataSet;
  Field: TField;

  procedure CheckRequiredParams;
  var
    I: Integer;
  begin
    for I := 0 to FParams.Count - 1 do
    with FParams[I] do
      if not Bound then
        IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
  end;

begin
  if DataSource <> nil then
  begin
    DataSet := DataSource.DataSet;
    if DataSet <> nil then
    begin
      DataSet.FieldDefs.Update;
      for I := 0 to FParams.Count - 1 do
      if not FParams[I].Bound then
      begin
        Field := DataSet.FindField(FParams[I].Name);
        if assigned(Field) then
        begin
            FParams[I].AssignField(Field);
            FParams[I].Bound := False;
        end;
      end;
    end
    else
      CheckRequiredParams;
  end
  else
    CheckRequiredParams;
end;


function TIBQuery.ParamByName(const Value: string): TParam;
begin
  if not Prepared then
    Prepare;
  Result := FParams.ParamByName(Value);
end;

procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
begin
  InternalBatchInput(InputObject);
end;

procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
begin
  InternalBatchOutput(OutputObject);
end;

procedure TIBQuery.ExecSQL;
var
  DidActivate: Boolean;
begin
  CheckInActive;
  if SQL.Count <= 0 then
    IBError(ibxeEmptySQLStatement, [nil]);

  ActivateConnection();
  DidActivate := ActivateTransaction;
  try
    SetPrepared(True);
    if DataSource <> nil then SetParamsFromCursor;
    if FParams.Count > 0 then SetParams;
    InternalExecQuery;
  finally
    if DidActivate then
      DeactivateTransaction;
  end;
end;

procedure TIBQuery.SetParams;

var
i : integer;
Buffer: Pointer;
SQLParam: ISQLParam;

begin
  for I := 0 to FParams.Count - 1 do
  begin
    SQLParam :=  SQLParams.ByName(Params[i].Name);
    if Params[i].IsNull then
      SQLParam.IsNull := True
    else begin
      SQLParam.IsNull := False;
      case Params[i].DataType of
        ftBytes:
        begin
          GetMem(Buffer,Params[i].GetDataSize);
          try
            Params[i].GetData(Buffer);
            SQLParam.AsPointer := Buffer;
          finally
            FreeMem(Buffer);
          end;
        end;
        ftString:
          SQLParam.AsString := Params[i].AsString;
        ftBoolean:
          SQLParam.AsBoolean := Params[i].AsBoolean;
        ftSmallint, ftWord:
          SQLParam.AsShort := Params[i].AsSmallInt;
        ftInteger:
          SQLParam.AsLong := Params[i].AsInteger;
        ftLargeInt:
          SQLParam.AsInt64 := Params[i].AsLargeInt;
        ftFloat:
         SQLParam.AsDouble := Params[i].AsFloat;
        ftBCD, ftCurrency:
          SQLParam.AsCurrency := Params[i].AsCurrency;
        ftDate:
          SQLParam.AsDate := Params[i].AsDateTime;
        ftTime:
          SQLParam.AsTime := Params[i].AsDateTime;
        ftDateTime:
          SQLParam.AsDateTime := Params[i].AsDateTime;
        ftBlob, ftMemo:
          SQLParam.AsString := Params[i].AsString;
        else
          IBError(ibxeNotSupported, [nil]);
      end;
    end;
  end;
end;

procedure TIBQuery.PrepareSQL;
var List: TParams;
begin
  QSelect.GenerateParamNames := GenerateParamNames;
  InternalPrepare;
  UpdateSQL;
  if ParamCheck  then
  begin
    List := TParams.Create(Self);
    try
      FText := List.ParseSQL(SQL.Text, True);
      List.AssignValues(FParams);
      FParams.Clear;
      FParams.Assign(List);
    finally
      List.Free;
    end;
  end;
end;


function TIBQuery.GetRowsAffected: Integer;
begin
  Result := -1;
  if Prepared then
   Result := QSelect.RowsAffected
end;


procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);

  function AddFieldToList(const FieldName: string; DataSet: TDataSet;
    List: TList): Boolean;
  var
    Field: TField;
  begin
    Field := DataSet.FindField(FieldName);
    if (Field <> nil) then
      List.Add(Field);
    Result := Field <> nil;
  end;

var
  i: Integer;
begin
  MasterFields.Clear;
  DetailFields.Clear;
  if (DataSource <> nil) and (DataSource.DataSet <> nil) then
    for i := 0 to Params.Count - 1 do
      if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
        AddFieldToList(Params[i].Name, Self, DetailFields);
end;

function TIBQuery.GetStmtHandle: IStatement;
begin
  Result := SelectStmtHandle;
end;

procedure TIBQuery.UpdateSQL;
begin
  if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
  begin
    FSQLUpdating := true;
    try
      SQL.Text := SelectSQL.Text;
    finally
      FSQLUpdating := false
    end;
  end;
end;

function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
begin
  Result := False;
end;

procedure TIBQuery.SetFiltered(Value: Boolean);
begin
  if(Filtered <> Value) then
  begin
    inherited SetFiltered(value);
    if Active then
    begin
      Close;
      Open;
    end;
  end
  else
    inherited SetFiltered(value);
end;

procedure TIBQuery.SQLChanged(Sender: TObject);
begin
  inherited SQLChanged(Sender);
  UpdateSQL;
end;

procedure TIBQuery.SQLChanging(Sender: TObject);
begin
  inherited SQLChanging(Sender);
  Prepared := false;
end;

{ TIBQuery IProviderSupport }
 (*
function TIBQuery.PSGetParams: TParams;
begin
  Result := Params;
end;

procedure TIBQuery.PSSetParams(AParams: TParams);
begin
  if AParams.Count <> 0 then
    Params.Assign(AParams);
  Close;
end;

function TIBQuery.PSGetTableName: string;
begin
  Result := inherited PSGetTableName;
end;

procedure TIBQuery.PSExecute;
begin
  ExecSQL;
end;

procedure TIBQuery.PSSetCommandText(const CommandText: string);
begin
  if CommandText <> '' then
    SQL.Text := CommandText;
end;
 *)
end.

Revision:	80
Committed:	Mon Jan 1 11:31:07 2018 UTC (6 years, 3 months ago) by tony
Content type:	text/x-pascal
File size:	14523 byte(s)
Log Message:	Fixes merged into public release
#	User	Rev	Content
1	tony	33	{************************************************************************}
2			{ }
3			{ Borland Delphi Visual Component Library }
4			{ InterBase Express core components }
5			{ }
6			{ Copyright (c) 1998-2000 Inprise Corporation }
7			{ }
8			{ InterBase Express is based in part on the product }
9			{ Free IB Components, written by Gregory H. Deatz for }
10			{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
11			{ Free IB Components is used under license. }
12			{ }
13			{ The contents of this file are subject to the InterBase }
14			{ Public License Version 1.0 (the "License"); you may not }
15			{ use this file except in compliance with the License. You }
16			{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17			{ Software distributed under the License is distributed on }
18			{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
19			{ express or implied. See the License for the specific language }
20			{ governing rights and limitations under the License. }
21			{ The Original Code was created by InterBase Software Corporation }
22			{ and its successors. }
23			{ Portions created by Inprise Corporation are Copyright (C) Inprise }
24			{ Corporation. All Rights Reserved. }
25			{ Contributor(s): Jeff Overcash }
26			{ }
27			{ IBX For Lazarus (Firebird Express) }
28			{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29			{ Portions created by MWA Software are copyright McCallum Whyman }
30			{ Associates Ltd 2011 }
31			{ }
32			{************************************************************************}
33
34			unit IBQuery;
35
36			interface
37
38			{$Mode Delphi}
39
40			uses
41			{$IFDEF WINDOWS }
42			Windows,
43			{$ELSE}
44			unix,
45			{$ENDIF}
46			SysUtils, Classes, Db,
47			IBHeader, IB, IBCustomDataSet, IBSQL, IBSQLParser;
48
49			type
50
51			{ TIBQuery }
52
53			TIBQuery = class(TIBParserDataSet)
54			private
55			FSQL: TStrings;
56			FPrepared: Boolean;
57			FParams: TParams;
58			FText: string;
59			FSQLUpdating: boolean;
60	tony	35	FInQueryChanged: boolean;
61	tony	33	function GetRowsAffected: Integer;
62			procedure PrepareSQL;
63			procedure QueryChanged(Sender: TObject);
64			procedure ReadParamData(Reader: TReader);
65			procedure SetQuery(Value: TStrings);
66			procedure SetParamsList(Value: TParams);
67			procedure SetParams;
68			procedure SetParamsFromCursor;
69			procedure SetPrepared(Value: Boolean);
70			procedure SetPrepare(Value: Boolean);
71			procedure WriteParamData(Writer: TWriter);
72	tony	45	function GetStmtHandle: IStatement;
73	tony	35	procedure UpdateSQL;
74	tony	33
75			protected
76			{ IProviderSupport }
77			(* procedure PSExecute; override;
78			function PSGetParams: TParams; override;
79			function PSGetTableName: string; override;
80			procedure PSSetCommandText(const CommandText: string); override;
81			procedure PSSetParams(AParams: TParams); override; *)
82
83			procedure DefineProperties(Filer: TFiler); override;
84			procedure InitFieldDefs; override;
85			procedure InternalOpen; override;
86			procedure Disconnect; override;
87			function GetParamsCount: Word;
88			function GenerateQueryForLiveUpdate : Boolean;
89			procedure SetFiltered(Value: Boolean); override;
90	tony	35	procedure SQLChanged(Sender: TObject); override;
91			procedure SQLChanging(Sender: TObject); override;
92	tony	33
93			public
94			constructor Create(AOwner: TComponent); override;
95			destructor Destroy; override;
96			procedure BatchInput(InputObject: TIBBatchInput);
97			procedure BatchOutput(OutputObject: TIBBatchOutput);
98			procedure ExecSQL;
99			procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
100			function ParamByName(const Value: string): TParam;
101			procedure Prepare;
102			procedure UnPrepare;
103	tony	35	procedure ResetParser; override;
104	tony	33	property Prepared: Boolean read FPrepared write SetPrepare;
105			property ParamCount: Word read GetParamsCount;
106	tony	45	property StmtHandle: IStatement read GetStmtHandle;
107	tony	33	property StatementType;
108			property Text: string read FText;
109			property RowsAffected: Integer read GetRowsAffected;
110			// property Params: TParams read FParams write SetParamsList;
111			property BaseSQLSelect;
112
113			published
114			property Active;
115			property AutoCommit;
116			property BufferChunks;
117			property CachedUpdates;
118			property DataSource read GetDataSource write SetDataSource;
119			property GenerateParamNames;
120			// property Constraints stored ConstraintsStored;
121			property GeneratorField;
122			property ParamCheck;
123			property SQL: TStrings read FSQL write SetQuery;
124			property Params: TParams read FParams write SetParamsList;
125			property UniDirectional default False;
126			property UpdateObject;
127			property Filtered;
128			property DataSetCloseAction;
129
130			property BeforeDatabaseDisconnect;
131			property AfterDatabaseDisconnect;
132			property DatabaseFree;
133			property BeforeTransactionEnd;
134			property AfterTransactionEnd;
135			property TransactionFree;
136			property OnFilterRecord;
137			property OnValidatePost;
138			end;
139
140			implementation
141
142	tony	45	uses FBMessages;
143
144	tony	33	{ TIBQuery }
145
146			constructor TIBQuery.Create(AOwner: TComponent);
147			begin
148			inherited Create(AOwner);
149			FSQL := TStringList.Create;
150			TStringList(SQL).OnChange := QueryChanged;
151			FParams := TParams.Create(Self);
152			ParamCheck := True;
153			end;
154
155			destructor TIBQuery.Destroy;
156			begin
157			Destroying;
158			Disconnect;
159			SQL.Free;
160			FParams.Free;
161			inherited Destroy;
162			end;
163
164			procedure TIBQuery.InitFieldDefs;
165			begin
166			inherited InitFieldDefs;
167			end;
168
169			procedure TIBQuery.InternalOpen;
170			begin
171			ActivateConnection();
172			ActivateTransaction;
173			QSelect.GenerateParamNames := GenerateParamNames;
174			SetPrepared(True);
175			if DataSource <> nil then
176			SetParamsFromCursor;
177			SetParams;
178			inherited InternalOpen;
179			end;
180
181			procedure TIBQuery.Disconnect;
182			begin
183			Close;
184			UnPrepare;
185			end;
186
187			procedure TIBQuery.SetPrepare(Value: Boolean);
188			begin
189			if Value then
190			Prepare
191			else
192			UnPrepare;
193			end;
194
195			procedure TIBQuery.Prepare;
196			begin
197			SetPrepared(True);
198			end;
199
200			procedure TIBQuery.UnPrepare;
201			begin
202			SetPrepared(False);
203			end;
204
205	tony	35	procedure TIBQuery.ResetParser;
206			begin
207			inherited ResetParser;
208			UpdateSQL;
209			end;
210
211	tony	33	procedure TIBQuery.SetQuery(Value: TStrings);
212			begin
213			if SQL.Text <> Value.Text then
214			begin
215			Disconnect;
216			SQL.BeginUpdate;
217			try
218			SQL.Assign(Value);
219			finally
220			SQL.EndUpdate;
221			end;
222			end;
223			end;
224
225			procedure TIBQuery.QueryChanged(Sender: TObject);
226			begin
227	tony	35	if FInQueryChanged then Exit;
228			FInQueryChanged := true;
229			try
230			if not (csReading in ComponentState) then
231	tony	33	begin
232	tony	35	Disconnect;
233			if csDesigning in ComponentState then
234			FText := FParams.ParseSQL(SQL.Text, true)
235			else
236			FText := SQL.Text;
237			DataEvent(dePropertyChange, 0);
238			end else
239			FText := FParams.ParseSQL(SQL.Text, true);
240
241			if not FSQLUpdating then
242			begin
243			Prepared := false;
244			SelectSQL.Assign(SQL);
245	tony	33	end;
246	tony	35	finally
247			FInQueryChanged := false;
248			end;
249	tony	33	end;
250
251			procedure TIBQuery.SetParamsList(Value: TParams);
252			begin
253			FParams.AssignValues(Value);
254			end;
255
256			function TIBQuery.GetParamsCount: Word;
257			begin
258			Result := FParams.Count;
259			end;
260
261			procedure TIBQuery.DefineProperties(Filer: TFiler);
262
263			function WriteData: Boolean;
264			begin
265			{The following results in a stream read error with nested frames. Hence commented out until
266			someone fixes the LCL }
267			{ if Filer.Ancestor <> nil then
268			Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
269			Result := FParams.Count > 0;
270			end;
271
272			begin
273			inherited DefineProperties(Filer);
274			Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
275			end;
276
277
278			procedure TIBQuery.ReadParamData(Reader: TReader);
279			begin
280			FParams.Clear;
281			Reader.ReadValue;
282			Reader.ReadCollection(FParams);
283			end;
284
285			procedure TIBQuery.WriteParamData(Writer: TWriter);
286			begin
287			Writer.WriteCollection(Params);
288			end;
289
290			procedure TIBQuery.SetPrepared(Value: Boolean);
291			begin
292			CheckDatasetClosed;
293			if Value <> Prepared then
294			begin
295			if Value then
296			begin
297			if Length(Text) > 1 then PrepareSQL
298			else IBError(ibxeEmptySQLStatement, [nil]);
299			end
300			else
301			begin
302			InternalUnPrepare;
303	tony	35	FParams.Clear;
304	tony	33	end;
305			FPrepared := Value;
306			end;
307			end;
308
309			procedure TIBQuery.SetParamsFromCursor;
310			var
311			I: Integer;
312			DataSet: TDataSet;
313			Field: TField;
314
315			procedure CheckRequiredParams;
316			var
317			I: Integer;
318			begin
319			for I := 0 to FParams.Count - 1 do
320			with FParams[I] do
321			if not Bound then
322			IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
323			end;
324
325			begin
326			if DataSource <> nil then
327			begin
328			DataSet := DataSource.DataSet;
329			if DataSet <> nil then
330			begin
331			DataSet.FieldDefs.Update;
332			for I := 0 to FParams.Count - 1 do
333			if not FParams[I].Bound then
334			begin
335			Field := DataSet.FindField(FParams[I].Name);
336			if assigned(Field) then
337			begin
338			FParams[I].AssignField(Field);
339			FParams[I].Bound := False;
340			end;
341			end;
342			end
343			else
344			CheckRequiredParams;
345			end
346			else
347			CheckRequiredParams;
348			end;
349
350
351			function TIBQuery.ParamByName(const Value: string): TParam;
352			begin
353	tony	35	if not Prepared then
354			Prepare;
355	tony	33	Result := FParams.ParamByName(Value);
356			end;
357
358			procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
359			begin
360			InternalBatchInput(InputObject);
361			end;
362
363			procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
364			begin
365			InternalBatchOutput(OutputObject);
366			end;
367
368			procedure TIBQuery.ExecSQL;
369			var
370			DidActivate: Boolean;
371			begin
372			CheckInActive;
373			if SQL.Count <= 0 then
374			IBError(ibxeEmptySQLStatement, [nil]);
375	tony	80
376	tony	33	ActivateConnection();
377			DidActivate := ActivateTransaction;
378			try
379			SetPrepared(True);
380			if DataSource <> nil then SetParamsFromCursor;
381			if FParams.Count > 0 then SetParams;
382			InternalExecQuery;
383			finally
384			if DidActivate then
385			DeactivateTransaction;
386			end;
387			end;
388
389			procedure TIBQuery.SetParams;
390
391			var
392			i : integer;
393			Buffer: Pointer;
394	tony	45	SQLParam: ISQLParam;
395	tony	33
396			begin
397			for I := 0 to FParams.Count - 1 do
398			begin
399			SQLParam := SQLParams.ByName(Params[i].Name);
400			if Params[i].IsNull then
401			SQLParam.IsNull := True
402			else begin
403			SQLParam.IsNull := False;
404			case Params[i].DataType of
405			ftBytes:
406			begin
407			GetMem(Buffer,Params[i].GetDataSize);
408			try
409			Params[i].GetData(Buffer);
410			SQLParam.AsPointer := Buffer;
411			finally
412			FreeMem(Buffer);
413			end;
414			end;
415			ftString:
416			SQLParam.AsString := Params[i].AsString;
417			ftBoolean:
418			SQLParam.AsBoolean := Params[i].AsBoolean;
419			ftSmallint, ftWord:
420			SQLParam.AsShort := Params[i].AsSmallInt;
421			ftInteger:
422			SQLParam.AsLong := Params[i].AsInteger;
423			ftLargeInt:
424			SQLParam.AsInt64 := Params[i].AsLargeInt;
425			ftFloat:
426			SQLParam.AsDouble := Params[i].AsFloat;
427			ftBCD, ftCurrency:
428			SQLParam.AsCurrency := Params[i].AsCurrency;
429			ftDate:
430			SQLParam.AsDate := Params[i].AsDateTime;
431			ftTime:
432			SQLParam.AsTime := Params[i].AsDateTime;
433			ftDateTime:
434			SQLParam.AsDateTime := Params[i].AsDateTime;
435			ftBlob, ftMemo:
436			SQLParam.AsString := Params[i].AsString;
437			else
438			IBError(ibxeNotSupported, [nil]);
439			end;
440			end;
441			end;
442			end;
443
444			procedure TIBQuery.PrepareSQL;
445	tony	35	var List: TParams;
446	tony	33	begin
447			QSelect.GenerateParamNames := GenerateParamNames;
448			InternalPrepare;
449	tony	35	UpdateSQL;
450			if ParamCheck then
451			begin
452			List := TParams.Create(Self);
453			try
454			FText := List.ParseSQL(SQL.Text, True);
455			List.AssignValues(FParams);
456			FParams.Clear;
457			FParams.Assign(List);
458			finally
459			List.Free;
460			end;
461			end;
462	tony	33	end;
463
464
465			function TIBQuery.GetRowsAffected: Integer;
466			begin
467			Result := -1;
468			if Prepared then
469			Result := QSelect.RowsAffected
470			end;
471
472
473			procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
474
475			function AddFieldToList(const FieldName: string; DataSet: TDataSet;
476			List: TList): Boolean;
477			var
478			Field: TField;
479			begin
480			Field := DataSet.FindField(FieldName);
481			if (Field <> nil) then
482			List.Add(Field);
483			Result := Field <> nil;
484			end;
485
486			var
487			i: Integer;
488			begin
489			MasterFields.Clear;
490			DetailFields.Clear;
491			if (DataSource <> nil) and (DataSource.DataSet <> nil) then
492			for i := 0 to Params.Count - 1 do
493			if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
494			AddFieldToList(Params[i].Name, Self, DetailFields);
495			end;
496
497	tony	45	function TIBQuery.GetStmtHandle: IStatement;
498	tony	33	begin
499			Result := SelectStmtHandle;
500			end;
501
502	tony	35	procedure TIBQuery.UpdateSQL;
503	tony	33	begin
504	tony	39	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
505	tony	35	begin
506			FSQLUpdating := true;
507			try
508			SQL.Text := SelectSQL.Text;
509			finally
510			FSQLUpdating := false
511			end;
512			end;
513	tony	33	end;
514
515			function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
516			begin
517			Result := False;
518			end;
519
520			procedure TIBQuery.SetFiltered(Value: Boolean);
521			begin
522			if(Filtered <> Value) then
523			begin
524			inherited SetFiltered(value);
525			if Active then
526			begin
527			Close;
528			Open;
529			end;
530			end
531			else
532			inherited SetFiltered(value);
533			end;
534
535	tony	35	procedure TIBQuery.SQLChanged(Sender: TObject);
536			begin
537			inherited SQLChanged(Sender);
538			UpdateSQL;
539			end;
540
541			procedure TIBQuery.SQLChanging(Sender: TObject);
542			begin
543			inherited SQLChanging(Sender);
544			Prepared := false;
545			end;
546
547	tony	33	{ TIBQuery IProviderSupport }
548			(*
549			function TIBQuery.PSGetParams: TParams;
550			begin
551			Result := Params;
552			end;
553
554			procedure TIBQuery.PSSetParams(AParams: TParams);
555			begin
556			if AParams.Count <> 0 then
557			Params.Assign(AParams);
558			Close;
559			end;
560
561			function TIBQuery.PSGetTableName: string;
562			begin
563			Result := inherited PSGetTableName;
564			end;
565
566			procedure TIBQuery.PSExecute;
567			begin
568			ExecSQL;
569			end;
570
571			procedure TIBQuery.PSSetCommandText(const CommandText: string);
572			begin
573			if CommandText <> '' then
574			SQL.Text := CommandText;
575			end;
576			*)
577			end.
578