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: TISC_STMT_HANDLE;
    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: 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 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

{ 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: 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:
          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: TISC_STMT_HANDLE;
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:	39
Committed:	Tue May 17 08:14:52 2016 UTC (8 years, 6 months ago) by tony
Content type:	text/x-pascal
File size:	14820 byte(s)
Log Message:	Committing updates for Release R1-4-1
#	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			function GetStmtHandle: TISC_STMT_HANDLE;
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			property StmtHandle: TISC_STMT_HANDLE 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			{ TIBQuery }
145
146			constructor TIBQuery.Create(AOwner: TComponent);
147			begin
148			inherited Create(AOwner);
149			FSQL := TStringList.Create;
150			TStringList(SQL).OnChange := QueryChanged;
151			FParams := TParams.Create(Self);
152			ParamCheck := True;
153			FRowsAffected := -1;
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			FRowsAffected := -1;
299			FCheckRowsAffected := True;
300			if Length(Text) > 1 then PrepareSQL
301			else IBError(ibxeEmptySQLStatement, [nil]);
302			end
303			else
304			begin
305			if FCheckRowsAffected then
306			FRowsAffected := RowsAffected;
307			InternalUnPrepare;
308	tony	35	FParams.Clear;
309	tony	33	end;
310			FPrepared := Value;
311			end;
312			end;
313
314			procedure TIBQuery.SetParamsFromCursor;
315			var
316			I: Integer;
317			DataSet: TDataSet;
318			Field: TField;
319
320			procedure CheckRequiredParams;
321			var
322			I: Integer;
323			begin
324			for I := 0 to FParams.Count - 1 do
325			with FParams[I] do
326			if not Bound then
327			IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
328			end;
329
330			begin
331			if DataSource <> nil then
332			begin
333			DataSet := DataSource.DataSet;
334			if DataSet <> nil then
335			begin
336			DataSet.FieldDefs.Update;
337			for I := 0 to FParams.Count - 1 do
338			if not FParams[I].Bound then
339			begin
340			Field := DataSet.FindField(FParams[I].Name);
341			if assigned(Field) then
342			begin
343			FParams[I].AssignField(Field);
344			FParams[I].Bound := False;
345			end;
346			end;
347			end
348			else
349			CheckRequiredParams;
350			end
351			else
352			CheckRequiredParams;
353			end;
354
355
356			function TIBQuery.ParamByName(const Value: string): TParam;
357			begin
358	tony	35	if not Prepared then
359			Prepare;
360	tony	33	Result := FParams.ParamByName(Value);
361			end;
362
363			procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
364			begin
365			InternalBatchInput(InputObject);
366			end;
367
368			procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
369			begin
370			InternalBatchOutput(OutputObject);
371			end;
372
373			procedure TIBQuery.ExecSQL;
374			var
375			DidActivate: Boolean;
376			begin
377			CheckInActive;
378			if SQL.Count <= 0 then
379			begin
380			FCheckRowsAffected := False;
381			IBError(ibxeEmptySQLStatement, [nil]);
382			end;
383			ActivateConnection();
384			DidActivate := ActivateTransaction;
385			try
386			SetPrepared(True);
387			if DataSource <> nil then SetParamsFromCursor;
388			if FParams.Count > 0 then SetParams;
389			InternalExecQuery;
390			finally
391			if DidActivate then
392			DeactivateTransaction;
393			FCheckRowsAffected := True;
394			end;
395			end;
396
397			procedure TIBQuery.SetParams;
398
399			var
400			i : integer;
401			Buffer: Pointer;
402			SQLParam: TIBXSQLVAR;
403
404			begin
405			for I := 0 to FParams.Count - 1 do
406			begin
407			SQLParam := SQLParams.ByName(Params[i].Name);
408			if Params[i].IsNull then
409			SQLParam.IsNull := True
410			else begin
411			SQLParam.IsNull := False;
412			case Params[i].DataType of
413			ftBytes:
414			begin
415			GetMem(Buffer,Params[i].GetDataSize);
416			try
417			Params[i].GetData(Buffer);
418			SQLParam.AsPointer := Buffer;
419			finally
420			FreeMem(Buffer);
421			end;
422			end;
423			ftString:
424			SQLParam.AsString := Params[i].AsString;
425			ftBoolean:
426			SQLParam.AsBoolean := Params[i].AsBoolean;
427			ftSmallint, ftWord:
428			SQLParam.AsShort := Params[i].AsSmallInt;
429			ftInteger:
430			SQLParam.AsLong := Params[i].AsInteger;
431			ftLargeInt:
432			SQLParam.AsInt64 := Params[i].AsLargeInt;
433			ftFloat:
434			SQLParam.AsDouble := Params[i].AsFloat;
435			ftBCD, ftCurrency:
436			SQLParam.AsCurrency := Params[i].AsCurrency;
437			ftDate:
438			SQLParam.AsDate := Params[i].AsDateTime;
439			ftTime:
440			SQLParam.AsTime := Params[i].AsDateTime;
441			ftDateTime:
442			SQLParam.AsDateTime := Params[i].AsDateTime;
443			ftBlob, ftMemo:
444			SQLParam.AsString := Params[i].AsString;
445			else
446			IBError(ibxeNotSupported, [nil]);
447			end;
448			end;
449			end;
450			end;
451
452			procedure TIBQuery.PrepareSQL;
453	tony	35	var List: TParams;
454	tony	33	begin
455			QSelect.GenerateParamNames := GenerateParamNames;
456			InternalPrepare;
457	tony	35	UpdateSQL;
458			if ParamCheck then
459			begin
460			List := TParams.Create(Self);
461			try
462			FText := List.ParseSQL(SQL.Text, True);
463			List.AssignValues(FParams);
464			FParams.Clear;
465			FParams.Assign(List);
466			finally
467			List.Free;
468			end;
469			end;
470	tony	33	end;
471
472
473			function TIBQuery.GetRowsAffected: Integer;
474			begin
475			Result := -1;
476			if Prepared then
477			Result := QSelect.RowsAffected
478			end;
479
480
481			procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
482
483			function AddFieldToList(const FieldName: string; DataSet: TDataSet;
484			List: TList): Boolean;
485			var
486			Field: TField;
487			begin
488			Field := DataSet.FindField(FieldName);
489			if (Field <> nil) then
490			List.Add(Field);
491			Result := Field <> nil;
492			end;
493
494			var
495			i: Integer;
496			begin
497			MasterFields.Clear;
498			DetailFields.Clear;
499			if (DataSource <> nil) and (DataSource.DataSet <> nil) then
500			for i := 0 to Params.Count - 1 do
501			if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
502			AddFieldToList(Params[i].Name, Self, DetailFields);
503			end;
504
505			function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
506			begin
507			Result := SelectStmtHandle;
508			end;
509
510	tony	35	procedure TIBQuery.UpdateSQL;
511	tony	33	begin
512	tony	39	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
513	tony	35	begin
514			FSQLUpdating := true;
515			try
516			SQL.Text := SelectSQL.Text;
517			finally
518			FSQLUpdating := false
519			end;
520			end;
521	tony	33	end;
522
523			function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
524			begin
525			Result := False;
526			end;
527
528			procedure TIBQuery.SetFiltered(Value: Boolean);
529			begin
530			if(Filtered <> Value) then
531			begin
532			inherited SetFiltered(value);
533			if Active then
534			begin
535			Close;
536			Open;
537			end;
538			end
539			else
540			inherited SetFiltered(value);
541			end;
542
543	tony	35	procedure TIBQuery.SQLChanged(Sender: TObject);
544			begin
545			inherited SQLChanged(Sender);
546			UpdateSQL;
547			end;
548
549			procedure TIBQuery.SQLChanging(Sender: TObject);
550			begin
551			inherited SQLChanging(Sender);
552			Prepared := false;
553			end;
554
555	tony	33	{ TIBQuery IProviderSupport }
556			(*
557			function TIBQuery.PSGetParams: TParams;
558			begin
559			Result := Params;
560			end;
561
562			procedure TIBQuery.PSSetParams(AParams: TParams);
563			begin
564			if AParams.Count <> 0 then
565			Params.Assign(AParams);
566			Close;
567			end;
568
569			function TIBQuery.PSGetTableName: string;
570			begin
571			Result := inherited PSGetTableName;
572			end;
573
574			procedure TIBQuery.PSExecute;
575			begin
576			ExecSQL;
577			end;
578
579			procedure TIBQuery.PSSetCommandText(const CommandText: string);
580			begin
581			if CommandText <> '' then
582			SQL.Text := CommandText;
583			end;
584			*)
585			end.
586