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

{$Mode Delphi}

uses
{$IFDEF LINUX }
  unix,
{$ELSE}
  Windows,
{$ENDIF}
 SysUtils, Graphics, Classes, Controls, Db,
     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 InitFieldDefs;
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:	5
Committed:	Fri Feb 18 16:26:16 2011 UTC (13 years, 2 months ago) by tony
Content type:	text/x-pascal
File size:	12986 byte(s)
Log Message:	Committing updates for Release pre-release
#	Content
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	{$Mode Delphi}
34
35	uses
36	{$IFDEF LINUX }
37	unix,
38	{$ELSE}
39	Windows,
40	{$ENDIF}
41	SysUtils, Graphics, Classes, Controls, Db,
42	IBHeader, IB, IBCustomDataSet, IBSQL;
43
44	type
45
46	{ TIBQuery }
47
48	TIBQuery = class(TIBCustomDataSet)
49	private
50	FSQL: TStrings;
51	FPrepared: Boolean;
52	FParams: TParams;
53	FText: string;
54	FRowsAffected: Integer;
55	FCheckRowsAffected: Boolean;
56	FGenerateParamNames: Boolean;
57	function GetRowsAffected: Integer;
58	procedure PrepareSQL(Value: PChar);
59	procedure QueryChanged(Sender: TObject);
60	procedure ReadParamData(Reader: TReader);
61	procedure SetQuery(Value: TStrings);
62	procedure SetParamsList(Value: TParams);
63	procedure SetParams;
64	procedure SetParamsFromCursor;
65	procedure SetPrepared(Value: Boolean);
66	procedure SetPrepare(Value: Boolean);
67	procedure WriteParamData(Writer: TWriter);
68	function GetStmtHandle: TISC_STMT_HANDLE;
69
70	protected
71	{ IProviderSupport }
72	(* procedure PSExecute; override;
73	function PSGetParams: TParams; override;
74	function PSGetTableName: string; override;
75	procedure PSSetCommandText(const CommandText: string); override;
76	procedure PSSetParams(AParams: TParams); override; *)
77
78	procedure DefineProperties(Filer: TFiler); override;
79	procedure InitFieldDefs; override;
80	procedure InternalOpen; override;
81	procedure Disconnect; override;
82	function GetParamsCount: Word;
83	function GenerateQueryForLiveUpdate : Boolean;
84	procedure SetFiltered(Value: Boolean); override;
85
86	public
87	constructor Create(AOwner: TComponent); override;
88	destructor Destroy; override;
89	procedure BatchInput(InputObject: TIBBatchInput);
90	procedure BatchOutput(OutputObject: TIBBatchOutput);
91	procedure ExecSQL;
92	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
93	function ParamByName(const Value: string): TParam;
94	procedure Prepare;
95	procedure UnPrepare;
96	property Prepared: Boolean read FPrepared write SetPrepare;
97	property ParamCount: Word read GetParamsCount;
98	property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
99	property StatementType;
100	property Text: string read FText;
101	property RowsAffected: Integer read GetRowsAffected;
102	property GenerateParamNames: Boolean read FGenerateParamNames write FGenerateParamNames;
103
104	published
105	property Active;
106	property BufferChunks;
107	property CachedUpdates;
108	property DataSource read GetDataSource write SetDataSource;
109	property Constraints stored ConstraintsStored;
110	property ParamCheck;
111	property SQL: TStrings read FSQL write SetQuery;
112	property Params: TParams read FParams write SetParamsList stored False;
113	property UniDirectional default False;
114	property UpdateObject;
115	property Filtered;
116
117	property BeforeDatabaseDisconnect;
118	property AfterDatabaseDisconnect;
119	property DatabaseFree;
120	property BeforeTransactionEnd;
121	property AfterTransactionEnd;
122	property TransactionFree;
123	property OnFilterRecord;
124	end;
125
126	implementation
127
128	{ TIBQuery }
129
130	constructor TIBQuery.Create(AOwner: TComponent);
131	begin
132	inherited Create(AOwner);
133	FSQL := TStringList.Create;
134	TStringList(SQL).OnChange := QueryChanged;
135	FParams := TParams.Create(Self);
136	ParamCheck := True;
137	FGenerateParamNames := False;
138	FRowsAffected := -1;
139	end;
140
141	destructor TIBQuery.Destroy;
142	begin
143	Destroying;
144	Disconnect;
145	SQL.Free;
146	FParams.Free;
147	inherited Destroy;
148	end;
149
150	procedure TIBQuery.InitFieldDefs;
151	begin
152	inherited InitFieldDefs;
153	end;
154
155	procedure TIBQuery.InternalOpen;
156	begin
157	ActivateConnection();
158	ActivateTransaction;
159	QSelect.GenerateParamNames := FGenerateParamNames;
160	SetPrepared(True);
161	if DataSource <> nil then
162	SetParamsFromCursor;
163	SetParams;
164	inherited InternalOpen;
165	end;
166
167	procedure TIBQuery.Disconnect;
168	begin
169	Close;
170	UnPrepare;
171	end;
172
173	procedure TIBQuery.SetPrepare(Value: Boolean);
174	begin
175	if Value then
176	Prepare
177	else
178	UnPrepare;
179	end;
180
181	procedure TIBQuery.Prepare;
182	begin
183	SetPrepared(True);
184	end;
185
186	procedure TIBQuery.UnPrepare;
187	begin
188	SetPrepared(False);
189	end;
190
191	procedure TIBQuery.SetQuery(Value: TStrings);
192	begin
193	if SQL.Text <> Value.Text then
194	begin
195	Disconnect;
196	SQL.BeginUpdate;
197	try
198	SQL.Assign(Value);
199	finally
200	SQL.EndUpdate;
201	end;
202	end;
203	end;
204
205	procedure TIBQuery.QueryChanged(Sender: TObject);
206	var
207	List: TParams;
208	begin
209	if not (csReading in ComponentState) then
210	begin
211	Disconnect;
212	if ParamCheck or (csDesigning in ComponentState) then
213	begin
214	List := TParams.Create(Self);
215	try
216	FText := List.ParseSQL(SQL.Text, True);
217	List.AssignValues(FParams);
218	FParams.Clear;
219	FParams.Assign(List);
220	finally
221	List.Free;
222	end;
223	end else
224	FText := SQL.Text;
225	DataEvent(dePropertyChange, 0);
226	end else
227	FText := FParams.ParseSQL(SQL.Text, False);
228	SelectSQL.Assign(SQL);
229	end;
230
231	procedure TIBQuery.SetParamsList(Value: TParams);
232	begin
233	FParams.AssignValues(Value);
234	end;
235
236	function TIBQuery.GetParamsCount: Word;
237	begin
238	Result := FParams.Count;
239	end;
240
241	procedure TIBQuery.DefineProperties(Filer: TFiler);
242
243	function WriteData: Boolean;
244	begin
245	if Filer.Ancestor <> nil then
246	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else
247	Result := FParams.Count > 0;
248	end;
249
250	begin
251	inherited DefineProperties(Filer);
252	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
253	end;
254
255	procedure TIBQuery.ReadParamData(Reader: TReader);
256	begin
257	Reader.ReadValue;
258	Reader.ReadCollection(FParams);
259	end;
260
261	procedure TIBQuery.WriteParamData(Writer: TWriter);
262	begin
263	Writer.WriteCollection(Params);
264	end;
265
266	procedure TIBQuery.SetPrepared(Value: Boolean);
267	begin
268	CheckDatasetClosed;
269	if Value <> Prepared then
270	begin
271	if Value then
272	begin
273	FRowsAffected := -1;
274	FCheckRowsAffected := True;
275	if Length(Text) > 1 then PrepareSQL(PChar(Text))
276	else IBError(ibxeEmptySQLStatement, [nil]);
277	end
278	else
279	begin
280	if FCheckRowsAffected then
281	FRowsAffected := RowsAffected;
282	InternalUnPrepare;
283	end;
284	FPrepared := Value;
285	end;
286	end;
287
288	procedure TIBQuery.SetParamsFromCursor;
289	var
290	I: Integer;
291	DataSet: TDataSet;
292
293	procedure CheckRequiredParams;
294	var
295	I: Integer;
296	begin
297	for I := 0 to FParams.Count - 1 do
298	with FParams[I] do
299	if not Bound then
300	IBError(ibxeRequiredParamNotSet, [nil]);
301	end;
302
303	begin
304	if DataSource <> nil then
305	begin
306	DataSet := DataSource.DataSet;
307	if DataSet <> nil then
308	begin
309	DataSet.FieldDefs.Update;
310	for I := 0 to FParams.Count - 1 do
311	with FParams[I] do
312	if not Bound then
313	begin
314	AssignField(DataSet.FieldByName(Name));
315	Bound := False;
316	end;
317	end
318	else
319	CheckRequiredParams;
320	end
321	else
322	CheckRequiredParams;
323	end;
324
325
326	function TIBQuery.ParamByName(const Value: string): TParam;
327	begin
328	Result := FParams.ParamByName(Value);
329	end;
330
331	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
332	begin
333	InternalBatchInput(InputObject);
334	end;
335
336	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
337	begin
338	InternalBatchOutput(OutputObject);
339	end;
340
341	procedure TIBQuery.ExecSQL;
342	var
343	DidActivate: Boolean;
344	begin
345	CheckInActive;
346	if SQL.Count <= 0 then
347	begin
348	FCheckRowsAffected := False;
349	IBError(ibxeEmptySQLStatement, [nil]);
350	end;
351	ActivateConnection();
352	DidActivate := ActivateTransaction;
353	try
354	SetPrepared(True);
355	if DataSource <> nil then SetParamsFromCursor;
356	if FParams.Count > 0 then SetParams;
357	InternalExecQuery;
358	finally
359	if DidActivate then
360	DeactivateTransaction;
361	FCheckRowsAffected := True;
362	end;
363	end;
364
365	procedure TIBQuery.SetParams;
366
367	var
368	i : integer;
369	Buffer: Pointer;
370
371	begin
372	for I := 0 to FParams.Count - 1 do
373	begin
374	if Params[i].IsNull then
375	SQLParams[i].IsNull := True
376	else begin
377	SQLParams[i].IsNull := False;
378	case Params[i].DataType of
379	ftBytes:
380	begin
381	GetMem(Buffer,Params[i].GetDataSize);
382	try
383	Params[i].GetData(Buffer);
384	SQLParams[i].AsPointer := Buffer;
385	finally
386	FreeMem(Buffer);
387	end;
388	end;
389	ftString:
390	SQLParams[i].AsString := Params[i].AsString;
391	ftBoolean, ftSmallint, ftWord:
392	SQLParams[i].AsShort := Params[i].AsSmallInt;
393	ftInteger:
394	SQLParams[i].AsLong := Params[i].AsInteger;
395	{ ftLargeInt:
396	SQLParams[i].AsInt64 := Params[i].AsLargeInt; }
397	ftFloat:
398	SQLParams[i].AsDouble := Params[i].AsFloat;
399	ftBCD, ftCurrency:
400	SQLParams[i].AsCurrency := Params[i].AsCurrency;
401	ftDate:
402	SQLParams[i].AsDate := Params[i].AsDateTime;
403	ftTime:
404	SQLParams[i].AsTime := Params[i].AsDateTime;
405	ftDateTime:
406	SQLParams[i].AsDateTime := Params[i].AsDateTime;
407	ftBlob, ftMemo:
408	SQLParams[i].AsString := Params[i].AsString;
409	else
410	IBError(ibxeNotSupported, [nil]);
411	end;
412	end;
413	end;
414	end;
415
416	procedure TIBQuery.PrepareSQL(Value: PChar);
417	begin
418	QSelect.GenerateParamNames := FGenerateParamNames;
419	InternalPrepare;
420	end;
421
422
423	function TIBQuery.GetRowsAffected: Integer;
424	begin
425	Result := -1;
426	if Prepared then
427	Result := QSelect.RowsAffected
428	end;
429
430
431	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
432
433	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
434	List: TList): Boolean;
435	var
436	Field: TField;
437	begin
438	Field := DataSet.FindField(FieldName);
439	if (Field <> nil) then
440	List.Add(Field);
441	Result := Field <> nil;
442	end;
443
444	var
445	i: Integer;
446	begin
447	MasterFields.Clear;
448	DetailFields.Clear;
449	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
450	for i := 0 to Params.Count - 1 do
451	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
452	AddFieldToList(Params[i].Name, Self, DetailFields);
453	end;
454
455	function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
456	begin
457	Result := SelectStmtHandle;
458	end;
459
460	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
461	begin
462	Result := False;
463	end;
464
465	procedure TIBQuery.SetFiltered(Value: Boolean);
466	begin
467	if(Filtered <> Value) then
468	begin
469	inherited SetFiltered(value);
470	if Active then
471	begin
472	Close;
473	Open;
474	end;
475	end
476	else
477	inherited SetFiltered(value);
478	end;
479
480	{ TIBQuery IProviderSupport }
481	(*
482	function TIBQuery.PSGetParams: TParams;
483	begin
484	Result := Params;
485	end;
486
487	procedure TIBQuery.PSSetParams(AParams: TParams);
488	begin
489	if AParams.Count <> 0 then
490	Params.Assign(AParams);
491	Close;
492	end;
493
494	function TIBQuery.PSGetTableName: string;
495	begin
496	Result := inherited PSGetTableName;
497	end;
498
499	procedure TIBQuery.PSExecute;
500	begin
501	ExecSQL;
502	end;
503
504	procedure TIBQuery.PSSetCommandText(const CommandText: string);
505	begin
506	if CommandText <> '' then
507	SQL.Text := CommandText;
508	end;
509	*)
510	end.
511