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;
    property OnDeleteReturning;
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:	118
Committed:	Mon Jan 22 13:58:14 2018 UTC (6 years, 10 months ago) by tony
Content type:	text/x-pascal
File size:	14555 byte(s)
Log Message:	Fixes Merged
#	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	{ 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	FInQueryChanged: boolean;
61	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	function GetStmtHandle: IStatement;
73	procedure UpdateSQL;
74
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	procedure SQLChanged(Sender: TObject); override;
91	procedure SQLChanging(Sender: TObject); override;
92
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	procedure ResetParser; override;
104	property Prepared: Boolean read FPrepared write SetPrepare;
105	property ParamCount: Word read GetParamsCount;
106	property StmtHandle: IStatement read GetStmtHandle;
107	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	property OnDeleteReturning;
139	end;
140
141	implementation
142
143	uses FBMessages;
144
145	{ TIBQuery }
146
147	constructor TIBQuery.Create(AOwner: TComponent);
148	begin
149	inherited Create(AOwner);
150	FSQL := TStringList.Create;
151	TStringList(SQL).OnChange := QueryChanged;
152	FParams := TParams.Create(Self);
153	ParamCheck := True;
154	end;
155
156	destructor TIBQuery.Destroy;
157	begin
158	Destroying;
159	Disconnect;
160	SQL.Free;
161	FParams.Free;
162	inherited Destroy;
163	end;
164
165	procedure TIBQuery.InitFieldDefs;
166	begin
167	inherited InitFieldDefs;
168	end;
169
170	procedure TIBQuery.InternalOpen;
171	begin
172	ActivateConnection();
173	ActivateTransaction;
174	QSelect.GenerateParamNames := GenerateParamNames;
175	SetPrepared(True);
176	if DataSource <> nil then
177	SetParamsFromCursor;
178	SetParams;
179	inherited InternalOpen;
180	end;
181
182	procedure TIBQuery.Disconnect;
183	begin
184	Close;
185	UnPrepare;
186	end;
187
188	procedure TIBQuery.SetPrepare(Value: Boolean);
189	begin
190	if Value then
191	Prepare
192	else
193	UnPrepare;
194	end;
195
196	procedure TIBQuery.Prepare;
197	begin
198	SetPrepared(True);
199	end;
200
201	procedure TIBQuery.UnPrepare;
202	begin
203	SetPrepared(False);
204	end;
205
206	procedure TIBQuery.ResetParser;
207	begin
208	inherited ResetParser;
209	UpdateSQL;
210	end;
211
212	procedure TIBQuery.SetQuery(Value: TStrings);
213	begin
214	if SQL.Text <> Value.Text then
215	begin
216	Disconnect;
217	SQL.BeginUpdate;
218	try
219	SQL.Assign(Value);
220	finally
221	SQL.EndUpdate;
222	end;
223	end;
224	end;
225
226	procedure TIBQuery.QueryChanged(Sender: TObject);
227	begin
228	if FInQueryChanged then Exit;
229	FInQueryChanged := true;
230	try
231	if not (csReading in ComponentState) then
232	begin
233	Disconnect;
234	if csDesigning in ComponentState then
235	FText := FParams.ParseSQL(SQL.Text, true)
236	else
237	FText := SQL.Text;
238	DataEvent(dePropertyChange, 0);
239	end else
240	FText := FParams.ParseSQL(SQL.Text, true);
241
242	if not FSQLUpdating then
243	begin
244	Prepared := false;
245	SelectSQL.Assign(SQL);
246	end;
247	finally
248	FInQueryChanged := false;
249	end;
250	end;
251
252	procedure TIBQuery.SetParamsList(Value: TParams);
253	begin
254	FParams.AssignValues(Value);
255	end;
256
257	function TIBQuery.GetParamsCount: Word;
258	begin
259	Result := FParams.Count;
260	end;
261
262	procedure TIBQuery.DefineProperties(Filer: TFiler);
263
264	function WriteData: Boolean;
265	begin
266	{The following results in a stream read error with nested frames. Hence commented out until
267	someone fixes the LCL }
268	{ if Filer.Ancestor <> nil then
269	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
270	Result := FParams.Count > 0;
271	end;
272
273	begin
274	inherited DefineProperties(Filer);
275	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
276	end;
277
278
279	procedure TIBQuery.ReadParamData(Reader: TReader);
280	begin
281	FParams.Clear;
282	Reader.ReadValue;
283	Reader.ReadCollection(FParams);
284	end;
285
286	procedure TIBQuery.WriteParamData(Writer: TWriter);
287	begin
288	Writer.WriteCollection(Params);
289	end;
290
291	procedure TIBQuery.SetPrepared(Value: Boolean);
292	begin
293	CheckDatasetClosed;
294	if Value <> Prepared then
295	begin
296	if Value then
297	begin
298	if Length(Text) > 1 then PrepareSQL
299	else IBError(ibxeEmptySQLStatement, [nil]);
300	end
301	else
302	begin
303	InternalUnPrepare;
304	FParams.Clear;
305	end;
306	FPrepared := Value;
307	end;
308	end;
309
310	procedure TIBQuery.SetParamsFromCursor;
311	var
312	I: Integer;
313	DataSet: TDataSet;
314	Field: TField;
315
316	procedure CheckRequiredParams;
317	var
318	I: Integer;
319	begin
320	for I := 0 to FParams.Count - 1 do
321	with FParams[I] do
322	if not Bound then
323	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
324	end;
325
326	begin
327	if DataSource <> nil then
328	begin
329	DataSet := DataSource.DataSet;
330	if DataSet <> nil then
331	begin
332	DataSet.FieldDefs.Update;
333	for I := 0 to FParams.Count - 1 do
334	if not FParams[I].Bound then
335	begin
336	Field := DataSet.FindField(FParams[I].Name);
337	if assigned(Field) then
338	begin
339	FParams[I].AssignField(Field);
340	FParams[I].Bound := False;
341	end;
342	end;
343	end
344	else
345	CheckRequiredParams;
346	end
347	else
348	CheckRequiredParams;
349	end;
350
351
352	function TIBQuery.ParamByName(const Value: string): TParam;
353	begin
354	if not Prepared then
355	Prepare;
356	Result := FParams.ParamByName(Value);
357	end;
358
359	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
360	begin
361	InternalBatchInput(InputObject);
362	end;
363
364	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
365	begin
366	InternalBatchOutput(OutputObject);
367	end;
368
369	procedure TIBQuery.ExecSQL;
370	var
371	DidActivate: Boolean;
372	begin
373	CheckInActive;
374	if SQL.Count <= 0 then
375	IBError(ibxeEmptySQLStatement, [nil]);
376
377	ActivateConnection();
378	DidActivate := ActivateTransaction;
379	try
380	SetPrepared(True);
381	if DataSource <> nil then SetParamsFromCursor;
382	if FParams.Count > 0 then SetParams;
383	InternalExecQuery;
384	finally
385	if DidActivate then
386	DeactivateTransaction;
387	end;
388	end;
389
390	procedure TIBQuery.SetParams;
391
392	var
393	i : integer;
394	Buffer: Pointer;
395	SQLParam: ISQLParam;
396
397	begin
398	for I := 0 to FParams.Count - 1 do
399	begin
400	SQLParam := SQLParams.ByName(Params[i].Name);
401	if Params[i].IsNull then
402	SQLParam.IsNull := True
403	else begin
404	SQLParam.IsNull := False;
405	case Params[i].DataType of
406	ftBytes:
407	begin
408	GetMem(Buffer,Params[i].GetDataSize);
409	try
410	Params[i].GetData(Buffer);
411	SQLParam.AsPointer := Buffer;
412	finally
413	FreeMem(Buffer);
414	end;
415	end;
416	ftString:
417	SQLParam.AsString := Params[i].AsString;
418	ftBoolean:
419	SQLParam.AsBoolean := Params[i].AsBoolean;
420	ftSmallint, ftWord:
421	SQLParam.AsShort := Params[i].AsSmallInt;
422	ftInteger:
423	SQLParam.AsLong := Params[i].AsInteger;
424	ftLargeInt:
425	SQLParam.AsInt64 := Params[i].AsLargeInt;
426	ftFloat:
427	SQLParam.AsDouble := Params[i].AsFloat;
428	ftBCD, ftCurrency:
429	SQLParam.AsCurrency := Params[i].AsCurrency;
430	ftDate:
431	SQLParam.AsDate := Params[i].AsDateTime;
432	ftTime:
433	SQLParam.AsTime := Params[i].AsDateTime;
434	ftDateTime:
435	SQLParam.AsDateTime := Params[i].AsDateTime;
436	ftBlob, ftMemo:
437	SQLParam.AsString := Params[i].AsString;
438	else
439	IBError(ibxeNotSupported, [nil]);
440	end;
441	end;
442	end;
443	end;
444
445	procedure TIBQuery.PrepareSQL;
446	var List: TParams;
447	begin
448	QSelect.GenerateParamNames := GenerateParamNames;
449	InternalPrepare;
450	UpdateSQL;
451	if ParamCheck then
452	begin
453	List := TParams.Create(Self);
454	try
455	FText := List.ParseSQL(SQL.Text, True);
456	List.AssignValues(FParams);
457	FParams.Clear;
458	FParams.Assign(List);
459	finally
460	List.Free;
461	end;
462	end;
463	end;
464
465
466	function TIBQuery.GetRowsAffected: Integer;
467	begin
468	Result := -1;
469	if Prepared then
470	Result := QSelect.RowsAffected
471	end;
472
473
474	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
475
476	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
477	List: TList): Boolean;
478	var
479	Field: TField;
480	begin
481	Field := DataSet.FindField(FieldName);
482	if (Field <> nil) then
483	List.Add(Field);
484	Result := Field <> nil;
485	end;
486
487	var
488	i: Integer;
489	begin
490	MasterFields.Clear;
491	DetailFields.Clear;
492	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
493	for i := 0 to Params.Count - 1 do
494	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
495	AddFieldToList(Params[i].Name, Self, DetailFields);
496	end;
497
498	function TIBQuery.GetStmtHandle: IStatement;
499	begin
500	Result := SelectStmtHandle;
501	end;
502
503	procedure TIBQuery.UpdateSQL;
504	begin
505	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
506	begin
507	FSQLUpdating := true;
508	try
509	SQL.Text := SelectSQL.Text;
510	finally
511	FSQLUpdating := false
512	end;
513	end;
514	end;
515
516	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
517	begin
518	Result := False;
519	end;
520
521	procedure TIBQuery.SetFiltered(Value: Boolean);
522	begin
523	if(Filtered <> Value) then
524	begin
525	inherited SetFiltered(value);
526	if Active then
527	begin
528	Close;
529	Open;
530	end;
531	end
532	else
533	inherited SetFiltered(value);
534	end;
535
536	procedure TIBQuery.SQLChanged(Sender: TObject);
537	begin
538	inherited SQLChanged(Sender);
539	UpdateSQL;
540	end;
541
542	procedure TIBQuery.SQLChanging(Sender: TObject);
543	begin
544	inherited SQLChanging(Sender);
545	Prepared := false;
546	end;
547
548	{ TIBQuery IProviderSupport }
549	(*
550	function TIBQuery.PSGetParams: TParams;
551	begin
552	Result := Params;
553	end;
554
555	procedure TIBQuery.PSSetParams(AParams: TParams);
556	begin
557	if AParams.Count <> 0 then
558	Params.Assign(AParams);
559	Close;
560	end;
561
562	function TIBQuery.PSGetTableName: string;
563	begin
564	Result := inherited PSGetTableName;
565	end;
566
567	procedure TIBQuery.PSExecute;
568	begin
569	ExecSQL;
570	end;
571
572	procedure TIBQuery.PSSetCommandText(const CommandText: string);
573	begin
574	if CommandText <> '' then
575	SQL.Text := CommandText;
576	end;
577	*)
578	end.
579