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 Int64;

  { 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    FPrepareSeqNo: integer; {used to check for out of date references from interfaces}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;
    function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
  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;

function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
begin
  Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
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:	209
Committed:	Wed Mar 14 12:48:51 2018 UTC (6 years, 1 month ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/FBStatement.pas*
File size:	10576 byte(s)
Log Message:	Fixes Merged
#	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	209	TPerfStatistics = array[psCurrentMemory..psFetches] of Int64;
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	tony	209	function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
84	tony	45	public
85			constructor Create(Attachment: IAttachment; Transaction: ITransaction;
86	tony	56	sql: AnsiString; SQLDialect: integer);
87	tony	45	constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
88	tony	56	sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false);
89	tony	45	destructor Destroy; override;
90			procedure Close;
91			procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
92			property SQLDialect: integer read FSQLDialect;
93
94			public
95			function GetSQLParams: ISQLParams; virtual; abstract;
96			function GetMetaData: IMetaData; virtual; abstract;
97			function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
98			DeleteCount: integer): boolean;
99			function GetSQLStatementType: TIBSQLStatementTypes;
100	tony	56	function GetSQLText: AnsiString;
101	tony	45	function GetSQLDialect: integer;
102
103			{GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
104			procedure Prepare(aTransaction: ITransaction=nil); virtual;
105			function Execute(aTransaction: ITransaction=nil): IResults;
106			function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
107	tony	56	function CreateBlob(paramName: AnsiString): IBlob; overload;
108	tony	45	function CreateBlob(index: integer): IBlob; overload;
109			function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
110	tony	56	function CreateArray(paramName: AnsiString): IArray; overload;
111	tony	45	function CreateArray(index: integer): IArray; overload;
112			function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
113			function GetAttachment: IAttachment;
114			function GetTransaction: ITransaction;
115			function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
116			procedure SetRetainInterfaces(aValue: boolean); virtual;
117	tony	47	procedure EnableStatistics(aValue: boolean);
118			function GetPerfStatistics(var stats: TPerfCounters): boolean;
119	tony	45	property ChangeSeqNo: integer read FChangeSeqNo;
120			property SQLParams: ISQLParams read GetSQLParams;
121			property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
122			end;
123
124			implementation
125
126			uses FBMessages;
127
128			{ TFBStatement }
129
130			procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
131			begin
132			if (aTransaction = nil) then
133			IBError(ibxeTransactionNotAssigned,[]);
134
135			if not aTransaction.InTransaction then
136			IBError(ibxeNotInTransaction,[]);
137			end;
138
139	tony	209	function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
140			begin
141			Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
142			end;
143
144	tony	45	constructor TFBStatement.Create(Attachment: IAttachment;
145	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
146	tony	45	begin
147			inherited Create(Transaction as TFBTransaction,2);
148			FAttachmentIntf := Attachment;
149			FTransactionIntf := Transaction;
150			FSQLDialect := SQLDialect;
151			FSQL := sql;
152			end;
153
154			constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
155	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
156	tony	45	GenerateParamNames: boolean);
157			begin
158			FHasParamNames := true;
159			FGenerateParamNames := GenerateParamNames;
160			Create(Attachment,Transaction,sql,SQLDialect);
161			end;
162
163			destructor TFBStatement.Destroy;
164			begin
165			Close;
166			FreeHandle;
167			inherited Destroy;
168			end;
169
170			procedure TFBStatement.Close;
171			begin
172			InternalClose(false);
173			end;
174
175			procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
176			Force: boolean);
177			begin
178			if FOpen and (FExecTransactionIntf = aTransaction) then
179			InternalClose(Force);
180
181			if FTransactionIntf = aTransaction then
182			begin
183			FreeHandle;
184			FPrepared := false;
185			end;
186			end;
187
188			function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
189			UpdateCount, DeleteCount: integer): boolean;
190			var
191			RB: ISQLInfoResults;
192			i, j: integer;
193			begin
194			InsertCount := 0;
195			UpdateCount := 0;
196			DeleteCount := 0;
197			Result := FPrepared;
198			if not Result then Exit;
199
200			RB := GetDsqlInfo(isc_info_sql_records);
201
202			for i := 0 to RB.Count - 1 do
203			with RB[i] do
204			case getItemType of
205			isc_info_sql_records:
206			for j := 0 to Count -1 do
207			with Items[j] do
208			case getItemType of
209			isc_info_req_select_count:
210			SelectCount := GetAsInteger;
211			isc_info_req_insert_count:
212			InsertCount := GetAsInteger;
213			isc_info_req_update_count:
214			UpdateCount := GetAsInteger;
215			isc_info_req_delete_count:
216			DeleteCount := GetAsInteger;
217			end;
218			end;
219			end;
220
221			function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
222			begin
223			Result := FSQLStatementType;
224			end;
225
226	tony	56	function TFBStatement.GetSQLText: AnsiString;
227	tony	45	begin
228			Result := FSQL;
229			end;
230
231			function TFBStatement.GetSQLDialect: integer;
232			begin
233			Result := FSQLDialect;
234			end;
235
236			procedure TFBStatement.Prepare(aTransaction: ITransaction);
237			begin
238			if FPrepared then FreeHandle;
239			if aTransaction <> nil then
240			begin
241			RemoveMonitor(FTransactionIntf as TFBTransaction);
242			FTransactionIntf := aTransaction;
243			AddMonitor(FTransactionIntf as TFBTransaction);
244			end;
245			InternalPrepare;
246			end;
247
248			function TFBStatement.Execute(aTransaction: ITransaction): IResults;
249			begin
250			if aTransaction = nil then
251			Result := InternalExecute(FTransactionIntf)
252			else
253			Result := InternalExecute(aTransaction);
254			end;
255
256			function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
257			begin
258			Close;
259			if aTransaction = nil then
260			Result := InternalOpenCursor(FTransactionIntf)
261			else
262			Result := InternalOpenCursor(aTransaction);
263			end;
264
265	tony	56	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
266	tony	45	var column: TColumnMetaData;
267			begin
268			InternalPrepare;
269			column := SQLParams.ByName(paramName) as TSQLParam;
270			if column = nil then
271			IBError(ibxeFieldNotFound,[paramName]);
272			Result := CreateBlob(column);
273			end;
274
275			function TFBStatement.CreateBlob(index: integer): IBlob;
276			begin
277			InternalPrepare;
278			Result := CreateBlob(SQLParams[index] as TSQLParam);
279			end;
280
281	tony	56	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
282	tony	45	var column: TColumnMetaData;
283			begin
284			InternalPrepare;
285			column := SQLParams.ByName(paramName) as TSQLParam;
286			if column = nil then
287			IBError(ibxeFieldNotFound,[paramName]);
288			Result := CreateArray(column);
289			end;
290
291			function TFBStatement.CreateArray(index: integer): IArray;
292			begin
293			InternalPrepare;
294			Result := CreateArray(SQLParams[index] as TSQLParam);
295			end;
296
297			function TFBStatement.GetAttachment: IAttachment;
298			begin
299			Result := FAttachmentIntf;
300			end;
301
302			function TFBStatement.GetTransaction: ITransaction;
303			begin
304			Result := FTransactionIntf
305			end;
306
307			function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
308			begin
309			Result := TSQLInfoResultsBuffer.Create;
310			GetDsqlInfo(Request,Result);
311			end;
312
313			procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
314			begin
315			RetainInterfaces := aValue;
316			end;
317
318	tony	47	procedure TFBStatement.EnableStatistics(aValue: boolean);
319			begin
320			if FCollectStatistics <> aValue then
321			begin
322			FCollectStatistics := aValue;
323			FStatisticsAvailable := false;
324			end;
325			end;
326
327			function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
328			begin
329			Result := FStatisticsAvailable;
330			if Result then
331			begin
332			stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
333			stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
334			stats[psMaxMemory] := FAfterStats[psMaxMemory];
335			stats[psRealTime] := FAfterStats[psRealTime] - FBeforeStats[psRealTime];
336			stats[psUserTime] := FAfterStats[psUserTime] - FBeforeStats[psUserTime];
337			stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
338			stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
339			stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
340			stats[psBuffers] := FAfterStats[psBuffers];
341			end;
342			end;
343
344	tony	45	end.
345