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, IB, IBCustomDataSet, IBSQL;

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:	139
Committed:	Wed Jan 24 16:16:29 2018 UTC (6 years, 10 months ago) by tony
Content type:	text/x-pascal
File size:	14527 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, IB, IBCustomDataSet, IBSQL;
47
48	type
49
50	{ TIBQuery }
51
52	TIBQuery = class(TIBParserDataSet)
53	private
54	FSQL: TStrings;
55	FPrepared: Boolean;
56	FParams: TParams;
57	FText: string;
58	FSQLUpdating: boolean;
59	FInQueryChanged: boolean;
60	function GetRowsAffected: Integer;
61	procedure PrepareSQL;
62	procedure QueryChanged(Sender: TObject);
63	procedure ReadParamData(Reader: TReader);
64	procedure SetQuery(Value: TStrings);
65	procedure SetParamsList(Value: TParams);
66	procedure SetParams;
67	procedure SetParamsFromCursor;
68	procedure SetPrepared(Value: Boolean);
69	procedure SetPrepare(Value: Boolean);
70	procedure WriteParamData(Writer: TWriter);
71	function GetStmtHandle: IStatement;
72	procedure UpdateSQL;
73
74	protected
75	{ IProviderSupport }
76	(* procedure PSExecute; override;
77	function PSGetParams: TParams; override;
78	function PSGetTableName: string; override;
79	procedure PSSetCommandText(const CommandText: string); override;
80	procedure PSSetParams(AParams: TParams); override; *)
81
82	procedure DefineProperties(Filer: TFiler); override;
83	procedure InitFieldDefs; override;
84	procedure InternalOpen; override;
85	procedure Disconnect; override;
86	function GetParamsCount: Word;
87	function GenerateQueryForLiveUpdate : Boolean;
88	procedure SetFiltered(Value: Boolean); override;
89	procedure SQLChanged(Sender: TObject); override;
90	procedure SQLChanging(Sender: TObject); override;
91
92	public
93	constructor Create(AOwner: TComponent); override;
94	destructor Destroy; override;
95	procedure BatchInput(InputObject: TIBBatchInput);
96	procedure BatchOutput(OutputObject: TIBBatchOutput);
97	procedure ExecSQL;
98	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
99	function ParamByName(const Value: string): TParam;
100	procedure Prepare;
101	procedure UnPrepare;
102	procedure ResetParser; override;
103	property Prepared: Boolean read FPrepared write SetPrepare;
104	property ParamCount: Word read GetParamsCount;
105	property StmtHandle: IStatement read GetStmtHandle;
106	property StatementType;
107	property Text: string read FText;
108	property RowsAffected: Integer read GetRowsAffected;
109	// property Params: TParams read FParams write SetParamsList;
110	property BaseSQLSelect;
111
112	published
113	property Active;
114	property AutoCommit;
115	property BufferChunks;
116	property CachedUpdates;
117	property DataSource read GetDataSource write SetDataSource;
118	property GenerateParamNames;
119	// property Constraints stored ConstraintsStored;
120	property GeneratorField;
121	property ParamCheck;
122	property SQL: TStrings read FSQL write SetQuery;
123	property Params: TParams read FParams write SetParamsList;
124	property UniDirectional default False;
125	property UpdateObject;
126	property Filtered;
127	property DataSetCloseAction;
128
129	property BeforeDatabaseDisconnect;
130	property AfterDatabaseDisconnect;
131	property DatabaseFree;
132	property BeforeTransactionEnd;
133	property AfterTransactionEnd;
134	property TransactionFree;
135	property OnFilterRecord;
136	property OnValidatePost;
137	property OnDeleteReturning;
138	end;
139
140	implementation
141
142	uses FBMessages;
143
144	{ 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	procedure TIBQuery.ResetParser;
206	begin
207	inherited ResetParser;
208	UpdateSQL;
209	end;
210
211	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	if FInQueryChanged then Exit;
228	FInQueryChanged := true;
229	try
230	if not (csReading in ComponentState) then
231	begin
232	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	end;
246	finally
247	FInQueryChanged := false;
248	end;
249	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	FParams.Clear;
304	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	if not Prepared then
354	Prepare;
355	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
376	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	SQLParam: ISQLParam;
395
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	var List: TParams;
446	begin
447	QSelect.GenerateParamNames := GenerateParamNames;
448	InternalPrepare;
449	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	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	function TIBQuery.GetStmtHandle: IStatement;
498	begin
499	Result := SelectStmtHandle;
500	end;
501
502	procedure TIBQuery.UpdateSQL;
503	begin
504	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
505	begin
506	FSQLUpdating := true;
507	try
508	SQL.Text := SelectSQL.Text;
509	finally
510	FSQLUpdating := false
511	end;
512	end;
513	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	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	{ 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