fbintf/client/FBStatement.pas

(*
 *  Firebird Interface (fbintf). The fbintf components provide a set of
 *  Pascal language bindings for the Firebird API. Although predominantly
 *  a new development they include source code taken from IBX and may be
 *  considered a derived product. This software thus also includes the copyright
 *  notice and license conditions from IBX.
 *
 *  Except for those parts dervied from IBX, contents of this file are subject
 *  to the Initial Developer's 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 here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  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 Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2016 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)
unit FBStatement;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

{$IFDEF FPC}
{$mode delphi}
{$codepage UTF8}
{$interfaces COM}
{$ENDIF}

interface

uses
  Classes, SysUtils,  IB,  FBClientAPI, FBSQLData, FBOutputBlock, FBActivityMonitor,
  FBTransaction;

type
  TPerfStatistics = array[psCurrentMemory..psFetches] of comp;

  { TFBStatement }

  TFBStatement = class(TActivityReporter)
  private
    FAttachmentIntf: IAttachment;
  protected
    FTransactionIntf: ITransaction;
    FExecTransactionIntf: ITransaction;
    FSQLStatementType: TIBSQLStatementTypes;         { Select, update, delete, insert, create, alter, etc...}
    FSQLDialect: integer;
    FOpen: boolean;
    FPrepared: boolean;
    FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
    FSQL: AnsiString;
    FProcessedSQL: AnsiString;
    FHasParamNames: boolean;
    FBOF: boolean;
    FEOF: boolean;
    FSingleResults: boolean;
    FGenerateParamNames: boolean;
    FChangeSeqNo: integer;
    FCollectStatistics: boolean;
    FStatisticsAvailable: boolean;
    FBeforeStats: TPerfStatistics;
    FAfterStats: TPerfStatistics;
    procedure CheckHandle; virtual; abstract;
    procedure CheckTransaction(aTransaction: ITransaction);
    procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
    procedure InternalPrepare;  virtual; abstract;
    function InternalExecute(aTransaction: ITransaction): IResults;  virtual; abstract;
    function InternalOpenCursor(aTransaction: ITransaction): IResultSet;   virtual; abstract;
    procedure FreeHandle;  virtual; abstract;
    procedure InternalClose(Force: boolean); virtual; abstract;
  public
    constructor Create(Attachment: IAttachment; Transaction: ITransaction;
      sql: AnsiString; SQLDialect: integer);
    constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
      sql: AnsiString;  SQLDialect: integer; GenerateParamNames: boolean =false);
    destructor Destroy; override;
    procedure Close;
    procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
    property SQLDialect: integer read FSQLDialect;

  public
    function GetSQLParams: ISQLParams; virtual; abstract;
    function GetMetaData: IMetaData;  virtual; abstract;
    function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
      DeleteCount: integer): boolean;
    function GetSQLStatementType: TIBSQLStatementTypes;
    function GetSQLText: AnsiString;
    function GetSQLDialect: integer;

    {GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
    procedure Prepare(aTransaction: ITransaction=nil); virtual;
    function Execute(aTransaction: ITransaction=nil): IResults;
    function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
    function CreateBlob(paramName: AnsiString): IBlob; overload;
    function CreateBlob(index: integer): IBlob; overload;
    function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
    function CreateArray(paramName: AnsiString): IArray; overload;
    function CreateArray(index: integer): IArray;  overload;
    function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
    function GetAttachment: IAttachment;
    function GetTransaction: ITransaction;
    function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
    procedure SetRetainInterfaces(aValue: boolean); virtual;
    procedure EnableStatistics(aValue: boolean);
    function GetPerfStatistics(var stats: TPerfCounters): boolean;
    property ChangeSeqNo: integer read FChangeSeqNo;
    property SQLParams: ISQLParams read GetSQLParams;
    property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
end;

implementation

uses FBMessages;

{ TFBStatement }

procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
begin
  if (aTransaction = nil) then
    IBError(ibxeTransactionNotAssigned,[]);

  if not aTransaction.InTransaction then
    IBError(ibxeNotInTransaction,[]);
end;

constructor TFBStatement.Create(Attachment: IAttachment;
  Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
begin
  inherited Create(Transaction as TFBTransaction,2);
  FAttachmentIntf := Attachment;
  FTransactionIntf := Transaction;
  FSQLDialect := SQLDialect;
  FSQL := sql;
end;

constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
  Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
  GenerateParamNames: boolean);
begin
  FHasParamNames := true;
  FGenerateParamNames := GenerateParamNames;
  Create(Attachment,Transaction,sql,SQLDialect);
end;

destructor TFBStatement.Destroy;
begin
  Close;
  FreeHandle;
  inherited Destroy;
end;

procedure TFBStatement.Close;
begin
  InternalClose(false);
end;

procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
  Force: boolean);
begin
  if FOpen and (FExecTransactionIntf = aTransaction) then
    InternalClose(Force);

  if FTransactionIntf = aTransaction then
  begin
    FreeHandle;
    FPrepared := false;
  end;
end;

function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
  UpdateCount, DeleteCount: integer): boolean;
var
  RB: ISQLInfoResults;
  i, j: integer;
begin
  InsertCount := 0;
  UpdateCount := 0;
  DeleteCount := 0;
  Result := FPrepared;
  if not Result then Exit;

  RB := GetDsqlInfo(isc_info_sql_records);

  for i := 0 to RB.Count - 1 do
  with RB[i] do
  case getItemType of
  isc_info_sql_records:
    for j := 0 to Count -1 do
    with Items[j] do
    case getItemType of
    isc_info_req_select_count:
      SelectCount := GetAsInteger;
    isc_info_req_insert_count:
      InsertCount := GetAsInteger;
    isc_info_req_update_count:
      UpdateCount := GetAsInteger;
    isc_info_req_delete_count:
      DeleteCount := GetAsInteger;
    end;
  end;
end;

function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
begin
  Result := FSQLStatementType;
end;

function TFBStatement.GetSQLText: AnsiString;
begin
  Result := FSQL;
end;

function TFBStatement.GetSQLDialect: integer;
begin
  Result := FSQLDialect;
end;

procedure TFBStatement.Prepare(aTransaction: ITransaction);
begin
  if FPrepared then FreeHandle;
  if aTransaction <> nil then
  begin
    RemoveMonitor(FTransactionIntf as TFBTransaction);
    FTransactionIntf := aTransaction;
    AddMonitor(FTransactionIntf as TFBTransaction);
  end;
  InternalPrepare;
end;

function TFBStatement.Execute(aTransaction: ITransaction): IResults;
begin
  if aTransaction = nil then
    Result :=  InternalExecute(FTransactionIntf)
  else
    Result := InternalExecute(aTransaction);
end;

function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
begin
  Close;
  if aTransaction = nil then
    Result := InternalOpenCursor(FTransactionIntf)
  else
    Result := InternalOpenCursor(aTransaction);
end;

function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
var column: TColumnMetaData;
begin
  InternalPrepare;
  column := SQLParams.ByName(paramName) as TSQLParam;
  if column = nil then
    IBError(ibxeFieldNotFound,[paramName]);
  Result := CreateBlob(column);
end;

function TFBStatement.CreateBlob(index: integer): IBlob;
begin
  InternalPrepare;
  Result := CreateBlob(SQLParams[index] as TSQLParam);
end;

function TFBStatement.CreateArray(paramName: AnsiString): IArray;
var column: TColumnMetaData;
begin
  InternalPrepare;
  column := SQLParams.ByName(paramName) as TSQLParam;
  if column = nil then
    IBError(ibxeFieldNotFound,[paramName]);
  Result := CreateArray(column);
end;

function TFBStatement.CreateArray(index: integer): IArray;
begin
  InternalPrepare;
  Result := CreateArray(SQLParams[index] as TSQLParam);
end;

function TFBStatement.GetAttachment: IAttachment;
begin
  Result := FAttachmentIntf;
end;

function TFBStatement.GetTransaction: ITransaction;
begin
  Result := FTransactionIntf
end;

function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
begin
  Result := TSQLInfoResultsBuffer.Create;
  GetDsqlInfo(Request,Result);
end;

procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
begin
  RetainInterfaces := aValue;
end;

procedure TFBStatement.EnableStatistics(aValue: boolean);
begin
  if FCollectStatistics <> aValue then
  begin
    FCollectStatistics := aValue;
    FStatisticsAvailable := false;
  end;
end;

function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
begin
  Result := FStatisticsAvailable;
  if Result then
  begin
    stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
    stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
    stats[psMaxMemory] := FAfterStats[psMaxMemory];
    stats[psRealTime] :=  FAfterStats[psRealTime] - FBeforeStats[psRealTime];
    stats[psUserTime] :=  FAfterStats[psUserTime] - FBeforeStats[psUserTime];
    stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
    stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
    stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
    stats[psBuffers] :=  FAfterStats[psBuffers];
  end;
end;

end.

Revision:	56
Committed:	Mon Mar 6 10:20:02 2017 UTC (7 years, 9 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/FBStatement.pas*
File size:	10356 byte(s)
Log Message:	Committing updates for Trunk
#	User	Rev	Content
1	tony	45	(*
2			* Firebird Interface (fbintf). The fbintf components provide a set of
3			* Pascal language bindings for the Firebird API. Although predominantly
4			* a new development they include source code taken from IBX and may be
5			* considered a derived product. This software thus also includes the copyright
6			* notice and license conditions from IBX.
7			*
8			* Except for those parts dervied from IBX, contents of this file are subject
9			* to the Initial Developer's Public License Version 1.0 (the "License"); you
10			* may not use this file except in compliance with the License. You may obtain a
11			* copy of the License here:
12			*
13			* http://www.firebirdsql.org/index.php?op=doc&id=idpl
14			*
15			* Software distributed under the License is distributed on an "AS
16			* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17			* implied. See the License for the specific language governing rights
18			* and limitations under the License.
19			*
20			* The Initial Developer of the Original Code is Tony Whyman.
21			*
22			* The Original Code is (C) 2016 Tony Whyman, MWA Software
23			* (http://www.mwasoftware.co.uk).
24			*
25			* All Rights Reserved.
26			*
27			* Contributor(s): ______________________________________.
28			*
29			*)
30			unit FBStatement;
31	tony	56	{$IFDEF MSWINDOWS}
32			{$DEFINE WINDOWS}
33			{$ENDIF}
34	tony	45
35			{$IFDEF FPC}
36	tony	56	{$mode delphi}
37	tony	45	{$codepage UTF8}
38			{$interfaces COM}
39			{$ENDIF}
40
41			interface
42
43			uses
44			Classes, SysUtils, IB, FBClientAPI, FBSQLData, FBOutputBlock, FBActivityMonitor,
45			FBTransaction;
46
47			type
48	tony	56	TPerfStatistics = array[psCurrentMemory..psFetches] of comp;
49	tony	45
50			{ TFBStatement }
51
52			TFBStatement = class(TActivityReporter)
53			private
54			FAttachmentIntf: IAttachment;
55			protected
56			FTransactionIntf: ITransaction;
57			FExecTransactionIntf: ITransaction;
58			FSQLStatementType: TIBSQLStatementTypes; { Select, update, delete, insert, create, alter, etc...}
59			FSQLDialect: integer;
60			FOpen: boolean;
61			FPrepared: boolean;
62			FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
63	tony	56	FSQL: AnsiString;
64			FProcessedSQL: AnsiString;
65	tony	45	FHasParamNames: boolean;
66			FBOF: boolean;
67			FEOF: boolean;
68			FSingleResults: boolean;
69			FGenerateParamNames: boolean;
70			FChangeSeqNo: integer;
71	tony	47	FCollectStatistics: boolean;
72			FStatisticsAvailable: boolean;
73			FBeforeStats: TPerfStatistics;
74			FAfterStats: TPerfStatistics;
75	tony	45	procedure CheckHandle; virtual; abstract;
76			procedure CheckTransaction(aTransaction: ITransaction);
77			procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
78			procedure InternalPrepare; virtual; abstract;
79			function InternalExecute(aTransaction: ITransaction): IResults; virtual; abstract;
80			function InternalOpenCursor(aTransaction: ITransaction): IResultSet; virtual; abstract;
81			procedure FreeHandle; virtual; abstract;
82			procedure InternalClose(Force: boolean); virtual; abstract;
83			public
84			constructor Create(Attachment: IAttachment; Transaction: ITransaction;
85	tony	56	sql: AnsiString; SQLDialect: integer);
86	tony	45	constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
87	tony	56	sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false);
88	tony	45	destructor Destroy; override;
89			procedure Close;
90			procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
91			property SQLDialect: integer read FSQLDialect;
92
93			public
94			function GetSQLParams: ISQLParams; virtual; abstract;
95			function GetMetaData: IMetaData; virtual; abstract;
96			function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
97			DeleteCount: integer): boolean;
98			function GetSQLStatementType: TIBSQLStatementTypes;
99	tony	56	function GetSQLText: AnsiString;
100	tony	45	function GetSQLDialect: integer;
101
102			{GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
103			procedure Prepare(aTransaction: ITransaction=nil); virtual;
104			function Execute(aTransaction: ITransaction=nil): IResults;
105			function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
106	tony	56	function CreateBlob(paramName: AnsiString): IBlob; overload;
107	tony	45	function CreateBlob(index: integer): IBlob; overload;
108			function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
109	tony	56	function CreateArray(paramName: AnsiString): IArray; overload;
110	tony	45	function CreateArray(index: integer): IArray; overload;
111			function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
112			function GetAttachment: IAttachment;
113			function GetTransaction: ITransaction;
114			function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
115			procedure SetRetainInterfaces(aValue: boolean); virtual;
116	tony	47	procedure EnableStatistics(aValue: boolean);
117			function GetPerfStatistics(var stats: TPerfCounters): boolean;
118	tony	45	property ChangeSeqNo: integer read FChangeSeqNo;
119			property SQLParams: ISQLParams read GetSQLParams;
120			property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
121			end;
122
123			implementation
124
125			uses FBMessages;
126
127			{ TFBStatement }
128
129			procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
130			begin
131			if (aTransaction = nil) then
132			IBError(ibxeTransactionNotAssigned,[]);
133
134			if not aTransaction.InTransaction then
135			IBError(ibxeNotInTransaction,[]);
136			end;
137
138			constructor TFBStatement.Create(Attachment: IAttachment;
139	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
140	tony	45	begin
141			inherited Create(Transaction as TFBTransaction,2);
142			FAttachmentIntf := Attachment;
143			FTransactionIntf := Transaction;
144			FSQLDialect := SQLDialect;
145			FSQL := sql;
146			end;
147
148			constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
149	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
150	tony	45	GenerateParamNames: boolean);
151			begin
152			FHasParamNames := true;
153			FGenerateParamNames := GenerateParamNames;
154			Create(Attachment,Transaction,sql,SQLDialect);
155			end;
156
157			destructor TFBStatement.Destroy;
158			begin
159			Close;
160			FreeHandle;
161			inherited Destroy;
162			end;
163
164			procedure TFBStatement.Close;
165			begin
166			InternalClose(false);
167			end;
168
169			procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
170			Force: boolean);
171			begin
172			if FOpen and (FExecTransactionIntf = aTransaction) then
173			InternalClose(Force);
174
175			if FTransactionIntf = aTransaction then
176			begin
177			FreeHandle;
178			FPrepared := false;
179			end;
180			end;
181
182			function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
183			UpdateCount, DeleteCount: integer): boolean;
184			var
185			RB: ISQLInfoResults;
186			i, j: integer;
187			begin
188			InsertCount := 0;
189			UpdateCount := 0;
190			DeleteCount := 0;
191			Result := FPrepared;
192			if not Result then Exit;
193
194			RB := GetDsqlInfo(isc_info_sql_records);
195
196			for i := 0 to RB.Count - 1 do
197			with RB[i] do
198			case getItemType of
199			isc_info_sql_records:
200			for j := 0 to Count -1 do
201			with Items[j] do
202			case getItemType of
203			isc_info_req_select_count:
204			SelectCount := GetAsInteger;
205			isc_info_req_insert_count:
206			InsertCount := GetAsInteger;
207			isc_info_req_update_count:
208			UpdateCount := GetAsInteger;
209			isc_info_req_delete_count:
210			DeleteCount := GetAsInteger;
211			end;
212			end;
213			end;
214
215			function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
216			begin
217			Result := FSQLStatementType;
218			end;
219
220	tony	56	function TFBStatement.GetSQLText: AnsiString;
221	tony	45	begin
222			Result := FSQL;
223			end;
224
225			function TFBStatement.GetSQLDialect: integer;
226			begin
227			Result := FSQLDialect;
228			end;
229
230			procedure TFBStatement.Prepare(aTransaction: ITransaction);
231			begin
232			if FPrepared then FreeHandle;
233			if aTransaction <> nil then
234			begin
235			RemoveMonitor(FTransactionIntf as TFBTransaction);
236			FTransactionIntf := aTransaction;
237			AddMonitor(FTransactionIntf as TFBTransaction);
238			end;
239			InternalPrepare;
240			end;
241
242			function TFBStatement.Execute(aTransaction: ITransaction): IResults;
243			begin
244			if aTransaction = nil then
245			Result := InternalExecute(FTransactionIntf)
246			else
247			Result := InternalExecute(aTransaction);
248			end;
249
250			function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
251			begin
252			Close;
253			if aTransaction = nil then
254			Result := InternalOpenCursor(FTransactionIntf)
255			else
256			Result := InternalOpenCursor(aTransaction);
257			end;
258
259	tony	56	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
260	tony	45	var column: TColumnMetaData;
261			begin
262			InternalPrepare;
263			column := SQLParams.ByName(paramName) as TSQLParam;
264			if column = nil then
265			IBError(ibxeFieldNotFound,[paramName]);
266			Result := CreateBlob(column);
267			end;
268
269			function TFBStatement.CreateBlob(index: integer): IBlob;
270			begin
271			InternalPrepare;
272			Result := CreateBlob(SQLParams[index] as TSQLParam);
273			end;
274
275	tony	56	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
276	tony	45	var column: TColumnMetaData;
277			begin
278			InternalPrepare;
279			column := SQLParams.ByName(paramName) as TSQLParam;
280			if column = nil then
281			IBError(ibxeFieldNotFound,[paramName]);
282			Result := CreateArray(column);
283			end;
284
285			function TFBStatement.CreateArray(index: integer): IArray;
286			begin
287			InternalPrepare;
288			Result := CreateArray(SQLParams[index] as TSQLParam);
289			end;
290
291			function TFBStatement.GetAttachment: IAttachment;
292			begin
293			Result := FAttachmentIntf;
294			end;
295
296			function TFBStatement.GetTransaction: ITransaction;
297			begin
298			Result := FTransactionIntf
299			end;
300
301			function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
302			begin
303			Result := TSQLInfoResultsBuffer.Create;
304			GetDsqlInfo(Request,Result);
305			end;
306
307			procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
308			begin
309			RetainInterfaces := aValue;
310			end;
311
312	tony	47	procedure TFBStatement.EnableStatistics(aValue: boolean);
313			begin
314			if FCollectStatistics <> aValue then
315			begin
316			FCollectStatistics := aValue;
317			FStatisticsAvailable := false;
318			end;
319			end;
320
321			function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
322			begin
323			Result := FStatisticsAvailable;
324			if Result then
325			begin
326			stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
327			stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
328			stats[psMaxMemory] := FAfterStats[psMaxMemory];
329			stats[psRealTime] := FAfterStats[psRealTime] - FBeforeStats[psRealTime];
330			stats[psUserTime] := FAfterStats[psUserTime] - FBeforeStats[psUserTime];
331			stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
332			stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
333			stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
334			stats[psBuffers] := FAfterStats[psBuffers];
335			end;
336			end;
337
338	tony	45	end.
339