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                                       }
{                                                                        }
{************************************************************************}

unit IBQuery;

interface

uses Windows, SysUtils, Graphics, Classes, Controls, Db, StdVCL,
     IBHeader, IB, IBCustomDataSet, IBSQL;

type

{ TIBQuery }

  TIBQuery = class(TIBCustomDataSet)
  private
    FSQL: TStrings;
    FPrepared: Boolean;
    FParams: TParams;
    FText: string;
    FRowsAffected: Integer;
    FCheckRowsAffected: Boolean;
    FGenerateParamNames: Boolean;
    function GetRowsAffected: Integer;
    procedure PrepareSQL(Value: PChar);
    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: TISC_STMT_HANDLE;

  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;

  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;
    property Prepared: Boolean read FPrepared write SetPrepare;
    property ParamCount: Word read GetParamsCount;
    property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
    property StatementType;
    property Text: string read FText;
    property RowsAffected: Integer read GetRowsAffected;
    property GenerateParamNames: Boolean read FGenerateParamNames write FGenerateParamNames;

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

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

implementation

{ TIBQuery }

constructor TIBQuery.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FSQL := TStringList.Create;
  TStringList(SQL).OnChange := QueryChanged;
  FParams := TParams.Create(Self);
  ParamCheck := True;
  FGenerateParamNames := False;
  FRowsAffected := -1;
end;

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

procedure TIBQuery.InitFieldDefs;
begin
  inherited;
end;

procedure TIBQuery.InternalOpen;
begin
  ActivateConnection();
  ActivateTransaction;
  QSelect.GenerateParamNames := FGenerateParamNames;
  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.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);
var
  List: TParams;
begin
  if not (csReading in ComponentState) then
  begin
    Disconnect;
    if ParamCheck or (csDesigning in ComponentState) 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 else
      FText := SQL.Text;
    DataEvent(dePropertyChange, 0);
  end else
    FText := FParams.ParseSQL(SQL.Text, False);
  SelectSQL.Assign(SQL);
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
    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
  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
      FRowsAffected := -1;
      FCheckRowsAffected := True;
      if Length(Text) > 1 then PrepareSQL(PChar(Text))
      else IBError(ibxeEmptySQLStatement, [nil]);
    end
    else
    begin
      if FCheckRowsAffected then
        FRowsAffected := RowsAffected;
      InternalUnPrepare;
    end;
    FPrepared := Value;
  end;
end;

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

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


function TIBQuery.ParamByName(const Value: string): TParam;
begin
  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
  begin
    FCheckRowsAffected := False;
    IBError(ibxeEmptySQLStatement, [nil]);
  end;
  ActivateConnection();
  DidActivate := ActivateTransaction;
  try
    SetPrepared(True);
    if DataSource <> nil then SetParamsFromCursor;
    if FParams.Count > 0 then SetParams;
    InternalExecQuery;
  finally
    if DidActivate then
      DeactivateTransaction;
    FCheckRowsAffected := True;
  end;
end;

procedure TIBQuery.SetParams;

var
i : integer;
Buffer: Pointer;

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

procedure TIBQuery.PrepareSQL(Value: PChar);
begin
  QSelect.GenerateParamNames := FGenerateParamNames;
  InternalPrepare;
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: TISC_STMT_HANDLE;
begin
  Result := SelectStmtHandle;
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;

{ 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:	1
Committed:	Mon Jul 31 16:43:00 2000 UTC (23 years, 9 months ago) by tony
Content type:	text/x-pascal
File size:	12904 byte(s)
Log Message:	Borland IBX Open Source Release
#	User	Rev	Content
1	tony	1	{************************************************************************}
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			{************************************************************************}
28
29			unit IBQuery;
30
31			interface
32
33			uses Windows, SysUtils, Graphics, Classes, Controls, Db, StdVCL,
34			IBHeader, IB, IBCustomDataSet, IBSQL;
35
36			type
37
38			{ TIBQuery }
39
40			TIBQuery = class(TIBCustomDataSet)
41			private
42			FSQL: TStrings;
43			FPrepared: Boolean;
44			FParams: TParams;
45			FText: string;
46			FRowsAffected: Integer;
47			FCheckRowsAffected: Boolean;
48			FGenerateParamNames: Boolean;
49			function GetRowsAffected: Integer;
50			procedure PrepareSQL(Value: PChar);
51			procedure QueryChanged(Sender: TObject);
52			procedure ReadParamData(Reader: TReader);
53			procedure SetQuery(Value: TStrings);
54			procedure SetParamsList(Value: TParams);
55			procedure SetParams;
56			procedure SetParamsFromCursor;
57			procedure SetPrepared(Value: Boolean);
58			procedure SetPrepare(Value: Boolean);
59			procedure WriteParamData(Writer: TWriter);
60			function GetStmtHandle: TISC_STMT_HANDLE;
61
62			protected
63			{ IProviderSupport }
64			procedure PSExecute; override;
65			function PSGetParams: TParams; override;
66			function PSGetTableName: string; override;
67			procedure PSSetCommandText(const CommandText: string); override;
68			procedure PSSetParams(AParams: TParams); override;
69
70			procedure DefineProperties(Filer: TFiler); override;
71			procedure InitFieldDefs; override;
72			procedure InternalOpen; override;
73			procedure Disconnect; override;
74			function GetParamsCount: Word;
75			function GenerateQueryForLiveUpdate : Boolean;
76			procedure SetFiltered(Value: Boolean); override;
77
78			public
79			constructor Create(AOwner: TComponent); override;
80			destructor Destroy; override;
81			procedure BatchInput(InputObject: TIBBatchInput);
82			procedure BatchOutput(OutputObject: TIBBatchOutput);
83			procedure ExecSQL;
84			procedure GetDetailLinkFields(MasterFields, DetailFields: TList); override;
85			function ParamByName(const Value: string): TParam;
86			procedure Prepare;
87			procedure UnPrepare;
88			property Prepared: Boolean read FPrepared write SetPrepare;
89			property ParamCount: Word read GetParamsCount;
90			property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
91			property StatementType;
92			property Text: string read FText;
93			property RowsAffected: Integer read GetRowsAffected;
94			property GenerateParamNames: Boolean read FGenerateParamNames write FGenerateParamNames;
95
96			published
97			property Active;
98			property BufferChunks;
99			property CachedUpdates;
100			property DataSource read GetDataSource write SetDataSource;
101			property Constraints stored ConstraintsStored;
102			property ParamCheck;
103			property SQL: TStrings read FSQL write SetQuery;
104			property Params: TParams read FParams write SetParamsList stored False;
105			property UniDirectional default False;
106			property UpdateObject;
107			property Filtered;
108
109			property BeforeDatabaseDisconnect;
110			property AfterDatabaseDisconnect;
111			property DatabaseFree;
112			property BeforeTransactionEnd;
113			property AfterTransactionEnd;
114			property TransactionFree;
115			property OnFilterRecord;
116			end;
117
118			implementation
119
120			{ TIBQuery }
121
122			constructor TIBQuery.Create(AOwner: TComponent);
123			begin
124			inherited Create(AOwner);
125			FSQL := TStringList.Create;
126			TStringList(SQL).OnChange := QueryChanged;
127			FParams := TParams.Create(Self);
128			ParamCheck := True;
129			FGenerateParamNames := False;
130			FRowsAffected := -1;
131			end;
132
133			destructor TIBQuery.Destroy;
134			begin
135			Destroying;
136			Disconnect;
137			SQL.Free;
138			FParams.Free;
139			inherited Destroy;
140			end;
141
142			procedure TIBQuery.InitFieldDefs;
143			begin
144			inherited;
145			end;
146
147			procedure TIBQuery.InternalOpen;
148			begin
149			ActivateConnection();
150			ActivateTransaction;
151			QSelect.GenerateParamNames := FGenerateParamNames;
152			SetPrepared(True);
153			if DataSource <> nil then
154			SetParamsFromCursor;
155			SetParams;
156			inherited InternalOpen;
157			end;
158
159			procedure TIBQuery.Disconnect;
160			begin
161			Close;
162			UnPrepare;
163			end;
164
165			procedure TIBQuery.SetPrepare(Value: Boolean);
166			begin
167			if Value then
168			Prepare
169			else
170			UnPrepare;
171			end;
172
173			procedure TIBQuery.Prepare;
174			begin
175			SetPrepared(True);
176			end;
177
178			procedure TIBQuery.UnPrepare;
179			begin
180			SetPrepared(False);
181			end;
182
183			procedure TIBQuery.SetQuery(Value: TStrings);
184			begin
185			if SQL.Text <> Value.Text then
186			begin
187			Disconnect;
188			SQL.BeginUpdate;
189			try
190			SQL.Assign(Value);
191			finally
192			SQL.EndUpdate;
193			end;
194			end;
195			end;
196
197			procedure TIBQuery.QueryChanged(Sender: TObject);
198			var
199			List: TParams;
200			begin
201			if not (csReading in ComponentState) then
202			begin
203			Disconnect;
204			if ParamCheck or (csDesigning in ComponentState) then
205			begin
206			List := TParams.Create(Self);
207			try
208			FText := List.ParseSQL(SQL.Text, True);
209			List.AssignValues(FParams);
210			FParams.Clear;
211			FParams.Assign(List);
212			finally
213			List.Free;
214			end;
215			end else
216			FText := SQL.Text;
217			DataEvent(dePropertyChange, 0);
218			end else
219			FText := FParams.ParseSQL(SQL.Text, False);
220			SelectSQL.Assign(SQL);
221			end;
222
223			procedure TIBQuery.SetParamsList(Value: TParams);
224			begin
225			FParams.AssignValues(Value);
226			end;
227
228			function TIBQuery.GetParamsCount: Word;
229			begin
230			Result := FParams.Count;
231			end;
232
233			procedure TIBQuery.DefineProperties(Filer: TFiler);
234
235			function WriteData: Boolean;
236			begin
237			if Filer.Ancestor <> nil then
238			Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else
239			Result := FParams.Count > 0;
240			end;
241
242			begin
243			inherited DefineProperties(Filer);
244			Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
245			end;
246
247			procedure TIBQuery.ReadParamData(Reader: TReader);
248			begin
249			Reader.ReadValue;
250			Reader.ReadCollection(FParams);
251			end;
252
253			procedure TIBQuery.WriteParamData(Writer: TWriter);
254			begin
255			Writer.WriteCollection(Params);
256			end;
257
258			procedure TIBQuery.SetPrepared(Value: Boolean);
259			begin
260			CheckDatasetClosed;
261			if Value <> Prepared then
262			begin
263			if Value then
264			begin
265			FRowsAffected := -1;
266			FCheckRowsAffected := True;
267			if Length(Text) > 1 then PrepareSQL(PChar(Text))
268			else IBError(ibxeEmptySQLStatement, [nil]);
269			end
270			else
271			begin
272			if FCheckRowsAffected then
273			FRowsAffected := RowsAffected;
274			InternalUnPrepare;
275			end;
276			FPrepared := Value;
277			end;
278			end;
279
280			procedure TIBQuery.SetParamsFromCursor;
281			var
282			I: Integer;
283			DataSet: TDataSet;
284
285			procedure CheckRequiredParams;
286			var
287			I: Integer;
288			begin
289			for I := 0 to FParams.Count - 1 do
290			with FParams[I] do
291			if not Bound then
292			IBError(ibxeRequiredParamNotSet, [nil]);
293			end;
294
295			begin
296			if DataSource <> nil then
297			begin
298			DataSet := DataSource.DataSet;
299			if DataSet <> nil then
300			begin
301			DataSet.FieldDefs.Update;
302			for I := 0 to FParams.Count - 1 do
303			with FParams[I] do
304			if not Bound then
305			begin
306			AssignField(DataSet.FieldByName(Name));
307			Bound := False;
308			end;
309			end
310			else
311			CheckRequiredParams;
312			end
313			else
314			CheckRequiredParams;
315			end;
316
317
318			function TIBQuery.ParamByName(const Value: string): TParam;
319			begin
320			Result := FParams.ParamByName(Value);
321			end;
322
323			procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
324			begin
325			InternalBatchInput(InputObject);
326			end;
327
328			procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
329			begin
330			InternalBatchOutput(OutputObject);
331			end;
332
333			procedure TIBQuery.ExecSQL;
334			var
335			DidActivate: Boolean;
336			begin
337			CheckInActive;
338			if SQL.Count <= 0 then
339			begin
340			FCheckRowsAffected := False;
341			IBError(ibxeEmptySQLStatement, [nil]);
342			end;
343			ActivateConnection();
344			DidActivate := ActivateTransaction;
345			try
346			SetPrepared(True);
347			if DataSource <> nil then SetParamsFromCursor;
348			if FParams.Count > 0 then SetParams;
349			InternalExecQuery;
350			finally
351			if DidActivate then
352			DeactivateTransaction;
353			FCheckRowsAffected := True;
354			end;
355			end;
356
357			procedure TIBQuery.SetParams;
358
359			var
360			i : integer;
361			Buffer: Pointer;
362
363			begin
364			for I := 0 to FParams.Count - 1 do
365			begin
366			if Params[i].IsNull then
367			SQLParams[i].IsNull := True
368			else begin
369			SQLParams[i].IsNull := False;
370			case Params[i].DataType of
371			ftBytes:
372			begin
373			GetMem(Buffer,Params[i].GetDataSize);
374			try
375			Params[i].GetData(Buffer);
376			SQLParams[i].AsPointer := Buffer;
377			finally
378			FreeMem(Buffer);
379			end;
380			end;
381			ftString:
382			SQLParams[i].AsString := Params[i].AsString;
383			ftBoolean, ftSmallint, ftWord:
384			SQLParams[i].AsShort := Params[i].AsSmallInt;
385			ftInteger:
386			SQLParams[i].AsLong := Params[i].AsInteger;
387			{ ftLargeInt:
388			SQLParams[i].AsInt64 := Params[i].AsLargeInt; }
389			ftFloat:
390			SQLParams[i].AsDouble := Params[i].AsFloat;
391			ftBCD, ftCurrency:
392			SQLParams[i].AsCurrency := Params[i].AsCurrency;
393			ftDate:
394			SQLParams[i].AsDate := Params[i].AsDateTime;
395			ftTime:
396			SQLParams[i].AsTime := Params[i].AsDateTime;
397			ftDateTime:
398			SQLParams[i].AsDateTime := Params[i].AsDateTime;
399			ftBlob, ftMemo:
400			SQLParams[i].AsString := Params[i].AsString;
401			else
402			IBError(ibxeNotSupported, [nil]);
403			end;
404			end;
405			end;
406			end;
407
408			procedure TIBQuery.PrepareSQL(Value: PChar);
409			begin
410			QSelect.GenerateParamNames := FGenerateParamNames;
411			InternalPrepare;
412			end;
413
414
415			function TIBQuery.GetRowsAffected: Integer;
416			begin
417			Result := -1;
418			if Prepared then
419			Result := QSelect.RowsAffected
420			end;
421
422
423			procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
424
425			function AddFieldToList(const FieldName: string; DataSet: TDataSet;
426			List: TList): Boolean;
427			var
428			Field: TField;
429			begin
430			Field := DataSet.FindField(FieldName);
431			if (Field <> nil) then
432			List.Add(Field);
433			Result := Field <> nil;
434			end;
435
436			var
437			i: Integer;
438			begin
439			MasterFields.Clear;
440			DetailFields.Clear;
441			if (DataSource <> nil) and (DataSource.DataSet <> nil) then
442			for i := 0 to Params.Count - 1 do
443			if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
444			AddFieldToList(Params[i].Name, Self, DetailFields);
445			end;
446
447			function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
448			begin
449			Result := SelectStmtHandle;
450			end;
451
452			function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
453			begin
454			Result := False;
455			end;
456
457			procedure TIBQuery.SetFiltered(Value: Boolean);
458			begin
459			if(Filtered <> Value) then
460			begin
461			inherited SetFiltered(value);
462			if Active then
463			begin
464			Close;
465			Open;
466			end;
467			end
468			else
469			inherited SetFiltered(value);
470			end;
471
472			{ TIBQuery IProviderSupport }
473
474			function TIBQuery.PSGetParams: TParams;
475			begin
476			Result := Params;
477			end;
478
479			procedure TIBQuery.PSSetParams(AParams: TParams);
480			begin
481			if AParams.Count <> 0 then
482			Params.Assign(AParams);
483			Close;
484			end;
485
486			function TIBQuery.PSGetTableName: string;
487			begin
488			Result := inherited PSGetTableName;
489			end;
490
491			procedure TIBQuery.PSExecute;
492			begin
493			ExecSQL;
494			end;
495
496			procedure TIBQuery.PSSetCommandText(const CommandText: string);
497			begin
498			if CommandText <> '' then
499			SQL.Text := CommandText;
500			end;
501
502			end.
503