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
#	User	Rev	Content
1	tony	33	{************************************************************************}
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	tony	35	FInQueryChanged: boolean;
61	tony	33	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	tony	45	function GetStmtHandle: IStatement;
73	tony	35	procedure UpdateSQL;
74	tony	33
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	tony	35	procedure SQLChanged(Sender: TObject); override;
91			procedure SQLChanging(Sender: TObject); override;
92	tony	33
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	tony	35	procedure ResetParser; override;
104	tony	33	property Prepared: Boolean read FPrepared write SetPrepare;
105			property ParamCount: Word read GetParamsCount;
106	tony	45	property StmtHandle: IStatement read GetStmtHandle;
107	tony	33	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	tony	118	property OnDeleteReturning;
139	tony	33	end;
140
141			implementation
142
143	tony	45	uses FBMessages;
144
145	tony	33	{ 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	tony	35	procedure TIBQuery.ResetParser;
207			begin
208			inherited ResetParser;
209			UpdateSQL;
210			end;
211
212	tony	33	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	tony	35	if FInQueryChanged then Exit;
229			FInQueryChanged := true;
230			try
231			if not (csReading in ComponentState) then
232	tony	33	begin
233	tony	35	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	tony	33	end;
247	tony	35	finally
248			FInQueryChanged := false;
249			end;
250	tony	33	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	tony	35	FParams.Clear;
305	tony	33	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	tony	35	if not Prepared then
355			Prepare;
356	tony	33	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	tony	80
377	tony	33	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	tony	45	SQLParam: ISQLParam;
396	tony	33
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	tony	35	var List: TParams;
447	tony	33	begin
448			QSelect.GenerateParamNames := GenerateParamNames;
449			InternalPrepare;
450	tony	35	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	tony	33	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	tony	45	function TIBQuery.GetStmtHandle: IStatement;
499	tony	33	begin
500			Result := SelectStmtHandle;
501			end;
502
503	tony	35	procedure TIBQuery.UpdateSQL;
504	tony	33	begin
505	tony	39	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
506	tony	35	begin
507			FSQLUpdating := true;
508			try
509			SQL.Text := SelectSQL.Text;
510			finally
511			FSQLUpdating := false
512			end;
513			end;
514	tony	33	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	tony	35	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	tony	33	{ 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