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, 4 months ago) by tony
Content type:	text/x-pascal
File size:	14819 byte(s)
Log Message:	Committing updates for Release R2-0-0
#	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			FRowsAffected: Integer;
60			FCheckRowsAffected: Boolean;
61			FSQLUpdating: boolean;
62	tony	35	FInQueryChanged: boolean;
63	tony	33	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	tony	45	function GetStmtHandle: IStatement;
75	tony	35	procedure UpdateSQL;
76	tony	33
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	tony	35	procedure SQLChanged(Sender: TObject); override;
93			procedure SQLChanging(Sender: TObject); override;
94	tony	33
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	tony	35	procedure ResetParser; override;
106	tony	33	property Prepared: Boolean read FPrepared write SetPrepare;
107			property ParamCount: Word read GetParamsCount;
108	tony	45	property StmtHandle: IStatement read GetStmtHandle;
109	tony	33	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	tony	45	uses FBMessages;
145
146	tony	33	{ 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	tony	35	procedure TIBQuery.ResetParser;
209			begin
210			inherited ResetParser;
211			UpdateSQL;
212			end;
213
214	tony	33	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	tony	35	if FInQueryChanged then Exit;
231			FInQueryChanged := true;
232			try
233			if not (csReading in ComponentState) then
234	tony	33	begin
235	tony	35	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	tony	33	end;
249	tony	35	finally
250			FInQueryChanged := false;
251			end;
252	tony	33	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	tony	35	FParams.Clear;
311	tony	33	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	tony	35	if not Prepared then
361			Prepare;
362	tony	33	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	tony	45	SQLParam: ISQLParam;
405	tony	33
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	tony	35	var List: TParams;
456	tony	33	begin
457			QSelect.GenerateParamNames := GenerateParamNames;
458			InternalPrepare;
459	tony	35	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	tony	33	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	tony	45	function TIBQuery.GetStmtHandle: IStatement;
508	tony	33	begin
509			Result := SelectStmtHandle;
510			end;
511
512	tony	35	procedure TIBQuery.UpdateSQL;
513	tony	33	begin
514	tony	39	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
515	tony	35	begin
516			FSQLUpdating := true;
517			try
518			SQL.Text := SelectSQL.Text;
519			finally
520			FSQLUpdating := false
521			end;
522			end;
523	tony	33	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	tony	35	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	tony	33	{ 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