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;
    FRowsAffected: Integer;
    FCheckRowsAffected: Boolean;
    FSQLUpdating: boolean;
    FInQueryChanged: boolean;
    function GetRowsAffected: Integer;
    procedure PrepareSQL;
    procedure QueryChanged(Sender: TObject);
    procedure ReadParamData(Reader: TReader);
    procedure SetQuery(Value: TStrings);
    procedure SetParamsList(Value: TParams);
    procedure SetParams;
    procedure SetParamsFromCursor;
    procedure SetPrepared(Value: Boolean);
    procedure SetPrepare(Value: Boolean);
    procedure WriteParamData(Writer: TWriter);
    function GetStmtHandle: IStatement;
    procedure UpdateSQL;

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

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

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

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

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

implementation

uses FBMessages;

{ TIBQuery }

constructor TIBQuery.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FSQL := TStringList.Create;
  TStringList(SQL).OnChange := QueryChanged;
  FParams := TParams.Create(Self);
  ParamCheck := True;
  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 := 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
      FRowsAffected := -1;
      FCheckRowsAffected := True;
      if Length(Text) > 1 then PrepareSQL
      else IBError(ibxeEmptySQLStatement, [nil]);
    end
    else
    begin
      if FCheckRowsAffected then
        FRowsAffected := RowsAffected;
      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
  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;
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:	45
Committed:	Tue Dec 6 10:33:46 2016 UTC (7 years, 11 months ago) by tony
Content type:	text/x-pascal
File size:	14819 byte(s)
Log Message:	Committing updates for Release R2-0-0
#	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	FRowsAffected: Integer;
60	FCheckRowsAffected: Boolean;
61	FSQLUpdating: boolean;
62	FInQueryChanged: boolean;
63	function GetRowsAffected: Integer;
64	procedure PrepareSQL;
65	procedure QueryChanged(Sender: TObject);
66	procedure ReadParamData(Reader: TReader);
67	procedure SetQuery(Value: TStrings);
68	procedure SetParamsList(Value: TParams);
69	procedure SetParams;
70	procedure SetParamsFromCursor;
71	procedure SetPrepared(Value: Boolean);
72	procedure SetPrepare(Value: Boolean);
73	procedure WriteParamData(Writer: TWriter);
74	function GetStmtHandle: IStatement;
75	procedure UpdateSQL;
76
77	protected
78	{ IProviderSupport }
79	(* procedure PSExecute; override;
80	function PSGetParams: TParams; override;
81	function PSGetTableName: string; override;
82	procedure PSSetCommandText(const CommandText: string); override;
83	procedure PSSetParams(AParams: TParams); override; *)
84
85	procedure DefineProperties(Filer: TFiler); override;
86	procedure InitFieldDefs; override;
87	procedure InternalOpen; override;
88	procedure Disconnect; override;
89	function GetParamsCount: Word;
90	function GenerateQueryForLiveUpdate : Boolean;
91	procedure SetFiltered(Value: Boolean); override;
92	procedure SQLChanged(Sender: TObject); override;
93	procedure SQLChanging(Sender: TObject); override;
94
95	public
96	constructor Create(AOwner: TComponent); override;
97	destructor Destroy; override;
98	procedure BatchInput(InputObject: TIBBatchInput);
99	procedure BatchOutput(OutputObject: TIBBatchOutput);
100	procedure ExecSQL;
101	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
102	function ParamByName(const Value: string): TParam;
103	procedure Prepare;
104	procedure UnPrepare;
105	procedure ResetParser; override;
106	property Prepared: Boolean read FPrepared write SetPrepare;
107	property ParamCount: Word read GetParamsCount;
108	property StmtHandle: IStatement read GetStmtHandle;
109	property StatementType;
110	property Text: string read FText;
111	property RowsAffected: Integer read GetRowsAffected;
112	// property Params: TParams read FParams write SetParamsList;
113	property BaseSQLSelect;
114
115	published
116	property Active;
117	property AutoCommit;
118	property BufferChunks;
119	property CachedUpdates;
120	property DataSource read GetDataSource write SetDataSource;
121	property GenerateParamNames;
122	// property Constraints stored ConstraintsStored;
123	property GeneratorField;
124	property ParamCheck;
125	property SQL: TStrings read FSQL write SetQuery;
126	property Params: TParams read FParams write SetParamsList;
127	property UniDirectional default False;
128	property UpdateObject;
129	property Filtered;
130	property DataSetCloseAction;
131
132	property BeforeDatabaseDisconnect;
133	property AfterDatabaseDisconnect;
134	property DatabaseFree;
135	property BeforeTransactionEnd;
136	property AfterTransactionEnd;
137	property TransactionFree;
138	property OnFilterRecord;
139	property OnValidatePost;
140	end;
141
142	implementation
143
144	uses FBMessages;
145
146	{ TIBQuery }
147
148	constructor TIBQuery.Create(AOwner: TComponent);
149	begin
150	inherited Create(AOwner);
151	FSQL := TStringList.Create;
152	TStringList(SQL).OnChange := QueryChanged;
153	FParams := TParams.Create(Self);
154	ParamCheck := True;
155	FRowsAffected := -1;
156	end;
157
158	destructor TIBQuery.Destroy;
159	begin
160	Destroying;
161	Disconnect;
162	SQL.Free;
163	FParams.Free;
164	inherited Destroy;
165	end;
166
167	procedure TIBQuery.InitFieldDefs;
168	begin
169	inherited InitFieldDefs;
170	end;
171
172	procedure TIBQuery.InternalOpen;
173	begin
174	ActivateConnection();
175	ActivateTransaction;
176	QSelect.GenerateParamNames := GenerateParamNames;
177	SetPrepared(True);
178	if DataSource <> nil then
179	SetParamsFromCursor;
180	SetParams;
181	inherited InternalOpen;
182	end;
183
184	procedure TIBQuery.Disconnect;
185	begin
186	Close;
187	UnPrepare;
188	end;
189
190	procedure TIBQuery.SetPrepare(Value: Boolean);
191	begin
192	if Value then
193	Prepare
194	else
195	UnPrepare;
196	end;
197
198	procedure TIBQuery.Prepare;
199	begin
200	SetPrepared(True);
201	end;
202
203	procedure TIBQuery.UnPrepare;
204	begin
205	SetPrepared(False);
206	end;
207
208	procedure TIBQuery.ResetParser;
209	begin
210	inherited ResetParser;
211	UpdateSQL;
212	end;
213
214	procedure TIBQuery.SetQuery(Value: TStrings);
215	begin
216	if SQL.Text <> Value.Text then
217	begin
218	Disconnect;
219	SQL.BeginUpdate;
220	try
221	SQL.Assign(Value);
222	finally
223	SQL.EndUpdate;
224	end;
225	end;
226	end;
227
228	procedure TIBQuery.QueryChanged(Sender: TObject);
229	begin
230	if FInQueryChanged then Exit;
231	FInQueryChanged := true;
232	try
233	if not (csReading in ComponentState) then
234	begin
235	Disconnect;
236	if csDesigning in ComponentState then
237	FText := FParams.ParseSQL(SQL.Text, true)
238	else
239	FText := SQL.Text;
240	DataEvent(dePropertyChange, 0);
241	end else
242	FText := FParams.ParseSQL(SQL.Text, true);
243
244	if not FSQLUpdating then
245	begin
246	Prepared := false;
247	SelectSQL.Assign(SQL);
248	end;
249	finally
250	FInQueryChanged := false;
251	end;
252	end;
253
254	procedure TIBQuery.SetParamsList(Value: TParams);
255	begin
256	FParams.AssignValues(Value);
257	end;
258
259	function TIBQuery.GetParamsCount: Word;
260	begin
261	Result := FParams.Count;
262	end;
263
264	procedure TIBQuery.DefineProperties(Filer: TFiler);
265
266	function WriteData: Boolean;
267	begin
268	{The following results in a stream read error with nested frames. Hence commented out until
269	someone fixes the LCL }
270	{ if Filer.Ancestor <> nil then
271	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
272	Result := FParams.Count > 0;
273	end;
274
275	begin
276	inherited DefineProperties(Filer);
277	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
278	end;
279
280
281	procedure TIBQuery.ReadParamData(Reader: TReader);
282	begin
283	FParams.Clear;
284	Reader.ReadValue;
285	Reader.ReadCollection(FParams);
286	end;
287
288	procedure TIBQuery.WriteParamData(Writer: TWriter);
289	begin
290	Writer.WriteCollection(Params);
291	end;
292
293	procedure TIBQuery.SetPrepared(Value: Boolean);
294	begin
295	CheckDatasetClosed;
296	if Value <> Prepared then
297	begin
298	if Value then
299	begin
300	FRowsAffected := -1;
301	FCheckRowsAffected := True;
302	if Length(Text) > 1 then PrepareSQL
303	else IBError(ibxeEmptySQLStatement, [nil]);
304	end
305	else
306	begin
307	if FCheckRowsAffected then
308	FRowsAffected := RowsAffected;
309	InternalUnPrepare;
310	FParams.Clear;
311	end;
312	FPrepared := Value;
313	end;
314	end;
315
316	procedure TIBQuery.SetParamsFromCursor;
317	var
318	I: Integer;
319	DataSet: TDataSet;
320	Field: TField;
321
322	procedure CheckRequiredParams;
323	var
324	I: Integer;
325	begin
326	for I := 0 to FParams.Count - 1 do
327	with FParams[I] do
328	if not Bound then
329	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
330	end;
331
332	begin
333	if DataSource <> nil then
334	begin
335	DataSet := DataSource.DataSet;
336	if DataSet <> nil then
337	begin
338	DataSet.FieldDefs.Update;
339	for I := 0 to FParams.Count - 1 do
340	if not FParams[I].Bound then
341	begin
342	Field := DataSet.FindField(FParams[I].Name);
343	if assigned(Field) then
344	begin
345	FParams[I].AssignField(Field);
346	FParams[I].Bound := False;
347	end;
348	end;
349	end
350	else
351	CheckRequiredParams;
352	end
353	else
354	CheckRequiredParams;
355	end;
356
357
358	function TIBQuery.ParamByName(const Value: string): TParam;
359	begin
360	if not Prepared then
361	Prepare;
362	Result := FParams.ParamByName(Value);
363	end;
364
365	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
366	begin
367	InternalBatchInput(InputObject);
368	end;
369
370	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
371	begin
372	InternalBatchOutput(OutputObject);
373	end;
374
375	procedure TIBQuery.ExecSQL;
376	var
377	DidActivate: Boolean;
378	begin
379	CheckInActive;
380	if SQL.Count <= 0 then
381	begin
382	FCheckRowsAffected := False;
383	IBError(ibxeEmptySQLStatement, [nil]);
384	end;
385	ActivateConnection();
386	DidActivate := ActivateTransaction;
387	try
388	SetPrepared(True);
389	if DataSource <> nil then SetParamsFromCursor;
390	if FParams.Count > 0 then SetParams;
391	InternalExecQuery;
392	finally
393	if DidActivate then
394	DeactivateTransaction;
395	FCheckRowsAffected := True;
396	end;
397	end;
398
399	procedure TIBQuery.SetParams;
400
401	var
402	i : integer;
403	Buffer: Pointer;
404	SQLParam: ISQLParam;
405
406	begin
407	for I := 0 to FParams.Count - 1 do
408	begin
409	SQLParam := SQLParams.ByName(Params[i].Name);
410	if Params[i].IsNull then
411	SQLParam.IsNull := True
412	else begin
413	SQLParam.IsNull := False;
414	case Params[i].DataType of
415	ftBytes:
416	begin
417	GetMem(Buffer,Params[i].GetDataSize);
418	try
419	Params[i].GetData(Buffer);
420	SQLParam.AsPointer := Buffer;
421	finally
422	FreeMem(Buffer);
423	end;
424	end;
425	ftString:
426	SQLParam.AsString := Params[i].AsString;
427	ftBoolean:
428	SQLParam.AsBoolean := Params[i].AsBoolean;
429	ftSmallint, ftWord:
430	SQLParam.AsShort := Params[i].AsSmallInt;
431	ftInteger:
432	SQLParam.AsLong := Params[i].AsInteger;
433	ftLargeInt:
434	SQLParam.AsInt64 := Params[i].AsLargeInt;
435	ftFloat:
436	SQLParam.AsDouble := Params[i].AsFloat;
437	ftBCD, ftCurrency:
438	SQLParam.AsCurrency := Params[i].AsCurrency;
439	ftDate:
440	SQLParam.AsDate := Params[i].AsDateTime;
441	ftTime:
442	SQLParam.AsTime := Params[i].AsDateTime;
443	ftDateTime:
444	SQLParam.AsDateTime := Params[i].AsDateTime;
445	ftBlob, ftMemo:
446	SQLParam.AsString := Params[i].AsString;
447	else
448	IBError(ibxeNotSupported, [nil]);
449	end;
450	end;
451	end;
452	end;
453
454	procedure TIBQuery.PrepareSQL;
455	var List: TParams;
456	begin
457	QSelect.GenerateParamNames := GenerateParamNames;
458	InternalPrepare;
459	UpdateSQL;
460	if ParamCheck then
461	begin
462	List := TParams.Create(Self);
463	try
464	FText := List.ParseSQL(SQL.Text, True);
465	List.AssignValues(FParams);
466	FParams.Clear;
467	FParams.Assign(List);
468	finally
469	List.Free;
470	end;
471	end;
472	end;
473
474
475	function TIBQuery.GetRowsAffected: Integer;
476	begin
477	Result := -1;
478	if Prepared then
479	Result := QSelect.RowsAffected
480	end;
481
482
483	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
484
485	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
486	List: TList): Boolean;
487	var
488	Field: TField;
489	begin
490	Field := DataSet.FindField(FieldName);
491	if (Field <> nil) then
492	List.Add(Field);
493	Result := Field <> nil;
494	end;
495
496	var
497	i: Integer;
498	begin
499	MasterFields.Clear;
500	DetailFields.Clear;
501	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
502	for i := 0 to Params.Count - 1 do
503	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
504	AddFieldToList(Params[i].Name, Self, DetailFields);
505	end;
506
507	function TIBQuery.GetStmtHandle: IStatement;
508	begin
509	Result := SelectStmtHandle;
510	end;
511
512	procedure TIBQuery.UpdateSQL;
513	begin
514	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
515	begin
516	FSQLUpdating := true;
517	try
518	SQL.Text := SelectSQL.Text;
519	finally
520	FSQLUpdating := false
521	end;
522	end;
523	end;
524
525	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
526	begin
527	Result := False;
528	end;
529
530	procedure TIBQuery.SetFiltered(Value: Boolean);
531	begin
532	if(Filtered <> Value) then
533	begin
534	inherited SetFiltered(value);
535	if Active then
536	begin
537	Close;
538	Open;
539	end;
540	end
541	else
542	inherited SetFiltered(value);
543	end;
544
545	procedure TIBQuery.SQLChanged(Sender: TObject);
546	begin
547	inherited SQLChanged(Sender);
548	UpdateSQL;
549	end;
550
551	procedure TIBQuery.SQLChanging(Sender: TObject);
552	begin
553	inherited SQLChanging(Sender);
554	Prepared := false;
555	end;
556
557	{ TIBQuery IProviderSupport }
558	(*
559	function TIBQuery.PSGetParams: TParams;
560	begin
561	Result := Params;
562	end;
563
564	procedure TIBQuery.PSSetParams(AParams: TParams);
565	begin
566	if AParams.Count <> 0 then
567	Params.Assign(AParams);
568	Close;
569	end;
570
571	function TIBQuery.PSGetTableName: string;
572	begin
573	Result := inherited PSGetTableName;
574	end;
575
576	procedure TIBQuery.PSExecute;
577	begin
578	ExecSQL;
579	end;
580
581	procedure TIBQuery.PSSetCommandText(const CommandText: string);
582	begin
583	if CommandText <> '' then
584	SQL.Text := CommandText;
585	end;
586	*)
587	end.
588