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, Graphics, Classes, Controls, 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;
    function GetRowsAffected: Integer;
    procedure PrepareSQL(Value: PChar);
    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: TISC_STMT_HANDLE;

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

    function CreateParser: TSelectSQLParser; 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;

  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;
    property Prepared: Boolean read FPrepared write SetPrepare;
    property ParamCount: Word read GetParamsCount;
    property StmtHandle: TISC_STMT_HANDLE 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 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 BeforeDatabaseDisconnect;
    property AfterDatabaseDisconnect;
    property DatabaseFree;
    property BeforeTransactionEnd;
    property AfterTransactionEnd;
    property TransactionFree;
    property OnFilterRecord;
end;

implementation

{ 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.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);
var
  List: TParams;
begin
  if not (csReading in ComponentState) then
  begin
    Disconnect;
    if HasParser and not FSQLUpdating then
    begin
      FSQLUpdating := true;
      try
        SQL.Text := Parser.SQLText;
      finally
        FSQLUpdating := false
      end;
    end;
    if ParamCheck or (csDesigning in ComponentState) 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 else
      FText := SQL.Text;
    DataEvent(dePropertyChange, 0);
  end else
    FText := FParams.ParseSQL(SQL.Text, true);
  SelectSQL.Assign(SQL);
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(PChar(Text))
      else IBError(ibxeEmptySQLStatement, [nil]);
    end
    else
    begin
      if FCheckRowsAffected then
        FRowsAffected := RowsAffected;
      InternalUnPrepare;
    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, [nil]);
  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
  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: TIBXSQLVAR;

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, 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(Value: PChar);
begin
  QSelect.GenerateParamNames := GenerateParamNames;
  InternalPrepare;
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: TISC_STMT_HANDLE;
begin
  Result := SelectStmtHandle;
end;

function TIBQuery.CreateParser: TSelectSQLParser;
begin
  Result := inherited CreateParser;
  Result.OnSQLChanging := QueryChanged;
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;

{ 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:	21
Committed:	Thu Feb 26 10:33:34 2015 UTC (9 years, 1 month ago) by tony
Content type:	text/x-pascal
File size:	14573 byte(s)
Log Message:	Committing updates for Release R1-2-0
#	User	Rev	Content
1	tony	17	{************************************************************************}
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, Graphics, Classes, Controls, Db,
47	tony	21	IBHeader, IB, IBCustomDataSet, IBSQL, IBSQLParser;
48	tony	17
49			type
50
51			{ TIBQuery }
52
53	tony	21	TIBQuery = class(TIBParserDataSet)
54	tony	17	private
55			FSQL: TStrings;
56			FPrepared: Boolean;
57			FParams: TParams;
58			FText: string;
59			FRowsAffected: Integer;
60			FCheckRowsAffected: Boolean;
61	tony	21	FSQLUpdating: boolean;
62	tony	17	function GetRowsAffected: Integer;
63			procedure PrepareSQL(Value: PChar);
64			procedure QueryChanged(Sender: TObject);
65			procedure ReadParamData(Reader: TReader);
66			procedure SetQuery(Value: TStrings);
67			procedure SetParamsList(Value: TParams);
68			procedure SetParams;
69			procedure SetParamsFromCursor;
70			procedure SetPrepared(Value: Boolean);
71			procedure SetPrepare(Value: Boolean);
72			procedure WriteParamData(Writer: TWriter);
73			function GetStmtHandle: TISC_STMT_HANDLE;
74
75			protected
76			{ IProviderSupport }
77			(* procedure PSExecute; override;
78			function PSGetParams: TParams; override;
79			function PSGetTableName: string; override;
80			procedure PSSetCommandText(const CommandText: string); override;
81			procedure PSSetParams(AParams: TParams); override; *)
82
83	tony	21	function CreateParser: TSelectSQLParser; override;
84	tony	17	procedure DefineProperties(Filer: TFiler); override;
85			procedure InitFieldDefs; override;
86			procedure InternalOpen; override;
87			procedure Disconnect; override;
88			function GetParamsCount: Word;
89			function GenerateQueryForLiveUpdate : Boolean;
90			procedure SetFiltered(Value: Boolean); 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			property Prepared: Boolean read FPrepared write SetPrepare;
103			property ParamCount: Word read GetParamsCount;
104			property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
105			property StatementType;
106			property Text: string read FText;
107			property RowsAffected: Integer read GetRowsAffected;
108			// property Params: TParams read FParams write SetParamsList;
109	tony	21	property BaseSQLSelect;
110	tony	17
111			published
112			property Active;
113			property BufferChunks;
114			property CachedUpdates;
115			property DataSource read GetDataSource write SetDataSource;
116	tony	19	property GenerateParamNames;
117	tony	17	// property Constraints stored ConstraintsStored;
118			property GeneratorField;
119			property ParamCheck;
120			property SQL: TStrings read FSQL write SetQuery;
121	tony	19	property Params: TParams read FParams write SetParamsList;
122	tony	17	property UniDirectional default False;
123			property UpdateObject;
124			property Filtered;
125
126			property BeforeDatabaseDisconnect;
127			property AfterDatabaseDisconnect;
128			property DatabaseFree;
129			property BeforeTransactionEnd;
130			property AfterTransactionEnd;
131			property TransactionFree;
132			property OnFilterRecord;
133			end;
134
135			implementation
136
137			{ TIBQuery }
138
139			constructor TIBQuery.Create(AOwner: TComponent);
140			begin
141			inherited Create(AOwner);
142			FSQL := TStringList.Create;
143			TStringList(SQL).OnChange := QueryChanged;
144			FParams := TParams.Create(Self);
145			ParamCheck := True;
146			FRowsAffected := -1;
147			end;
148
149			destructor TIBQuery.Destroy;
150			begin
151			Destroying;
152			Disconnect;
153			SQL.Free;
154			FParams.Free;
155			inherited Destroy;
156			end;
157
158			procedure TIBQuery.InitFieldDefs;
159			begin
160			inherited InitFieldDefs;
161			end;
162
163			procedure TIBQuery.InternalOpen;
164			begin
165			ActivateConnection();
166			ActivateTransaction;
167	tony	19	QSelect.GenerateParamNames := GenerateParamNames;
168	tony	17	SetPrepared(True);
169			if DataSource <> nil then
170			SetParamsFromCursor;
171			SetParams;
172			inherited InternalOpen;
173			end;
174
175			procedure TIBQuery.Disconnect;
176			begin
177			Close;
178			UnPrepare;
179			end;
180
181			procedure TIBQuery.SetPrepare(Value: Boolean);
182			begin
183			if Value then
184			Prepare
185			else
186			UnPrepare;
187			end;
188
189			procedure TIBQuery.Prepare;
190			begin
191			SetPrepared(True);
192			end;
193
194			procedure TIBQuery.UnPrepare;
195			begin
196			SetPrepared(False);
197			end;
198
199			procedure TIBQuery.SetQuery(Value: TStrings);
200			begin
201			if SQL.Text <> Value.Text then
202			begin
203			Disconnect;
204			SQL.BeginUpdate;
205			try
206			SQL.Assign(Value);
207			finally
208			SQL.EndUpdate;
209			end;
210			end;
211			end;
212
213			procedure TIBQuery.QueryChanged(Sender: TObject);
214			var
215			List: TParams;
216			begin
217			if not (csReading in ComponentState) then
218			begin
219			Disconnect;
220	tony	21	if HasParser and not FSQLUpdating then
221			begin
222			FSQLUpdating := true;
223			try
224			SQL.Text := Parser.SQLText;
225			finally
226			FSQLUpdating := false
227			end;
228			end;
229	tony	17	if ParamCheck or (csDesigning in ComponentState) then
230			begin
231			List := TParams.Create(Self);
232			try
233			FText := List.ParseSQL(SQL.Text, True);
234			List.AssignValues(FParams);
235			FParams.Clear;
236			FParams.Assign(List);
237			finally
238			List.Free;
239			end;
240			end else
241			FText := SQL.Text;
242			DataEvent(dePropertyChange, 0);
243			end else
244			FText := FParams.ParseSQL(SQL.Text, true);
245			SelectSQL.Assign(SQL);
246			end;
247
248			procedure TIBQuery.SetParamsList(Value: TParams);
249			begin
250			FParams.AssignValues(Value);
251			end;
252
253			function TIBQuery.GetParamsCount: Word;
254			begin
255			Result := FParams.Count;
256			end;
257
258			procedure TIBQuery.DefineProperties(Filer: TFiler);
259
260			function WriteData: Boolean;
261			begin
262			{The following results in a stream read error with nested frames. Hence commented out until
263			someone fixes the LCL }
264			{ if Filer.Ancestor <> nil then
265			Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
266			Result := FParams.Count > 0;
267			end;
268
269			begin
270			inherited DefineProperties(Filer);
271			Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
272			end;
273
274	tony	21
275	tony	17	procedure TIBQuery.ReadParamData(Reader: TReader);
276			begin
277			FParams.Clear;
278			Reader.ReadValue;
279			Reader.ReadCollection(FParams);
280			end;
281
282			procedure TIBQuery.WriteParamData(Writer: TWriter);
283			begin
284			Writer.WriteCollection(Params);
285			end;
286
287			procedure TIBQuery.SetPrepared(Value: Boolean);
288			begin
289			CheckDatasetClosed;
290			if Value <> Prepared then
291			begin
292			if Value then
293			begin
294			FRowsAffected := -1;
295			FCheckRowsAffected := True;
296			if Length(Text) > 1 then PrepareSQL(PChar(Text))
297			else IBError(ibxeEmptySQLStatement, [nil]);
298			end
299			else
300			begin
301			if FCheckRowsAffected then
302			FRowsAffected := RowsAffected;
303			InternalUnPrepare;
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, [nil]);
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			Result := FParams.ParamByName(Value);
354			end;
355
356			procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
357			begin
358			InternalBatchInput(InputObject);
359			end;
360
361			procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
362			begin
363			InternalBatchOutput(OutputObject);
364			end;
365
366			procedure TIBQuery.ExecSQL;
367			var
368			DidActivate: Boolean;
369			begin
370			CheckInActive;
371			if SQL.Count <= 0 then
372			begin
373			FCheckRowsAffected := False;
374			IBError(ibxeEmptySQLStatement, [nil]);
375			end;
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			FCheckRowsAffected := True;
387			end;
388			end;
389
390			procedure TIBQuery.SetParams;
391
392			var
393			i : integer;
394			Buffer: Pointer;
395	tony	21	SQLParam: TIBXSQLVAR;
396	tony	17
397			begin
398			for I := 0 to FParams.Count - 1 do
399			begin
400	tony	21	SQLParam := SQLParams.ByName(Params[i].Name);
401	tony	17	if Params[i].IsNull then
402	tony	21	SQLParam.IsNull := True
403	tony	17	else begin
404	tony	21	SQLParam.IsNull := False;
405	tony	17	case Params[i].DataType of
406			ftBytes:
407			begin
408			GetMem(Buffer,Params[i].GetDataSize);
409			try
410			Params[i].GetData(Buffer);
411	tony	21	SQLParam.AsPointer := Buffer;
412	tony	17	finally
413			FreeMem(Buffer);
414			end;
415			end;
416			ftString:
417	tony	21	SQLParam.AsString := Params[i].AsString;
418	tony	17	ftBoolean, ftSmallint, ftWord:
419	tony	21	SQLParam.AsShort := Params[i].AsSmallInt;
420	tony	17	ftInteger:
421	tony	21	SQLParam.AsLong := Params[i].AsInteger;
422	tony	19	ftLargeInt:
423	tony	21	SQLParam.AsInt64 := Params[i].AsLargeInt;
424	tony	17	ftFloat:
425	tony	21	SQLParam.AsDouble := Params[i].AsFloat;
426	tony	17	ftBCD, ftCurrency:
427	tony	21	SQLParam.AsCurrency := Params[i].AsCurrency;
428	tony	17	ftDate:
429	tony	21	SQLParam.AsDate := Params[i].AsDateTime;
430	tony	17	ftTime:
431	tony	21	SQLParam.AsTime := Params[i].AsDateTime;
432	tony	17	ftDateTime:
433	tony	21	SQLParam.AsDateTime := Params[i].AsDateTime;
434	tony	17	ftBlob, ftMemo:
435	tony	21	SQLParam.AsString := Params[i].AsString;
436	tony	17	else
437			IBError(ibxeNotSupported, [nil]);
438			end;
439			end;
440			end;
441			end;
442
443			procedure TIBQuery.PrepareSQL(Value: PChar);
444			begin
445	tony	19	QSelect.GenerateParamNames := GenerateParamNames;
446	tony	17	InternalPrepare;
447			end;
448
449
450			function TIBQuery.GetRowsAffected: Integer;
451			begin
452			Result := -1;
453			if Prepared then
454			Result := QSelect.RowsAffected
455			end;
456
457
458			procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
459
460			function AddFieldToList(const FieldName: string; DataSet: TDataSet;
461			List: TList): Boolean;
462			var
463			Field: TField;
464			begin
465			Field := DataSet.FindField(FieldName);
466			if (Field <> nil) then
467			List.Add(Field);
468			Result := Field <> nil;
469			end;
470
471			var
472			i: Integer;
473			begin
474			MasterFields.Clear;
475			DetailFields.Clear;
476			if (DataSource <> nil) and (DataSource.DataSet <> nil) then
477			for i := 0 to Params.Count - 1 do
478			if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
479			AddFieldToList(Params[i].Name, Self, DetailFields);
480			end;
481
482			function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
483			begin
484			Result := SelectStmtHandle;
485			end;
486
487	tony	21	function TIBQuery.CreateParser: TSelectSQLParser;
488			begin
489			Result := inherited CreateParser;
490			Result.OnSQLChanging := QueryChanged;
491			end;
492
493	tony	17	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
494			begin
495			Result := False;
496			end;
497
498			procedure TIBQuery.SetFiltered(Value: Boolean);
499			begin
500			if(Filtered <> Value) then
501			begin
502			inherited SetFiltered(value);
503			if Active then
504			begin
505			Close;
506			Open;
507			end;
508			end
509			else
510			inherited SetFiltered(value);
511			end;
512
513			{ TIBQuery IProviderSupport }
514			(*
515			function TIBQuery.PSGetParams: TParams;
516			begin
517			Result := Params;
518			end;
519
520			procedure TIBQuery.PSSetParams(AParams: TParams);
521			begin
522			if AParams.Count <> 0 then
523			Params.Assign(AParams);
524			Close;
525			end;
526
527			function TIBQuery.PSGetTableName: string;
528			begin
529			Result := inherited PSGetTableName;
530			end;
531
532			procedure TIBQuery.PSExecute;
533			begin
534			ExecSQL;
535			end;
536
537			procedure TIBQuery.PSSetCommandText(const CommandText: string);
538			begin
539			if CommandText <> '' then
540			SQL.Text := CommandText;
541			end;
542			*)
543			end.
544	tony	19