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root/public/ibx/branches/journaling/fbintf/client/FBStatement.pas

Comparing ibx/trunk/fbintf/client/FBStatement.pas (file contents):
Revision 45 by tony, Tue Dec 6 10:33:46 2016 UTC vs.
Revision 263 by tony, Thu Dec 6 15:55:01 2018 UTC

#	Line 28 | Line 28
28		*
29		*)
30		unit FBStatement;
31	+	{$IFDEF MSWINDOWS}
32	+	{$DEFINE WINDOWS}
33	+	{$ENDIF}
34
35		{$IFDEF FPC}
36	<	{$mode objfpc}{$H+}
36	>	{$mode delphi}
37		{$codepage UTF8}
38		{$interfaces COM}
39		{$ENDIF}
#	Line 42 | Line 45 | uses
45		FBTransaction;
46
47		type
48	+	TPerfStatistics = array[psCurrentMemory..psFetches] of Int64;
49
50		{ TFBStatement }
51
52		TFBStatement = class(TActivityReporter)
53		private
54		FAttachmentIntf: IAttachment;
55	+	FFirebirdClientAPI: TFBClientAPI;
56		protected
57		FTransactionIntf: ITransaction;
58		FExecTransactionIntf: ITransaction;
#	Line 56 | Line 61 | type
61		FOpen: boolean;
62		FPrepared: boolean;
63		FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
64	<	FSQL: string;
65	<	FProcessedSQL: string;
64	>	FSQL: AnsiString;
65	>	FProcessedSQL: AnsiString;
66		FHasParamNames: boolean;
67		FBOF: boolean;
68		FEOF: boolean;
69		FSingleResults: boolean;
70		FGenerateParamNames: boolean;
71		FChangeSeqNo: integer;
72	+	FCollectStatistics: boolean;
73	+	FStatisticsAvailable: boolean;
74	+	FBeforeStats: TPerfStatistics;
75	+	FAfterStats: TPerfStatistics;
76		procedure CheckHandle; virtual; abstract;
77		procedure CheckTransaction(aTransaction: ITransaction);
78		procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
79		procedure InternalPrepare;  virtual; abstract;
80		function InternalExecute(aTransaction: ITransaction): IResults;  virtual; abstract;
81		function InternalOpenCursor(aTransaction: ITransaction): IResultSet;   virtual; abstract;
82	+	procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
83		procedure FreeHandle;  virtual; abstract;
84		procedure InternalClose(Force: boolean); virtual; abstract;
85	+	function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
86		public
87		constructor Create(Attachment: IAttachment; Transaction: ITransaction;
88	<	sql: string; SQLDialect: integer);
88	>	sql: AnsiString; SQLDialect: integer);
89		constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
90	<	sql: string;  SQLDialect: integer; GenerateParamNames: boolean =false);
90	>	sql: AnsiString;  SQLDialect: integer; GenerateParamNames: boolean =false);
91		destructor Destroy; override;
92		procedure Close;
93		procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
94		property SQLDialect: integer read FSQLDialect;
95	+	property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;
96
97		public
98		function GetSQLParams: ISQLParams; virtual; abstract;
#	Line 88 | Line 100 | type
100		function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
101		DeleteCount: integer): boolean;
102		function GetSQLStatementType: TIBSQLStatementTypes;
103	<	function GetSQLText: string;
103	>	function GetSQLText: AnsiString;
104	>	function GetProcessedSQLText: AnsiString;
105		function GetSQLDialect: integer;
106
107		{GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
108		procedure Prepare(aTransaction: ITransaction=nil); virtual;
109		function Execute(aTransaction: ITransaction=nil): IResults;
110		function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
111	<	function CreateBlob(paramName: string): IBlob; overload;
111	>	function CreateBlob(paramName: AnsiString): IBlob; overload;
112		function CreateBlob(index: integer): IBlob; overload;
113		function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
114	<	function CreateArray(paramName: string): IArray; overload;
114	>	function CreateArray(paramName: AnsiString): IArray; overload;
115		function CreateArray(index: integer): IArray;  overload;
116		function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
117		function GetAttachment: IAttachment;
118		function GetTransaction: ITransaction;
119		function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
120		procedure SetRetainInterfaces(aValue: boolean); virtual;
121	+	procedure EnableStatistics(aValue: boolean);
122	+	function GetPerfStatistics(var stats: TPerfCounters): boolean;
123		property ChangeSeqNo: integer read FChangeSeqNo;
124		property SQLParams: ISQLParams read GetSQLParams;
125		property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
#	Line 125 | Line 140 | begin
140		IBError(ibxeNotInTransaction,[]);
141		end;
142
143	+	function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
144	+	begin
145	+	Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
146	+	end;
147	+
148		constructor TFBStatement.Create(Attachment: IAttachment;
149	<	Transaction: ITransaction; sql: string; SQLDialect: integer);
149	>	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
150		begin
151		inherited Create(Transaction as TFBTransaction,2);
152		FAttachmentIntf := Attachment;
153		FTransactionIntf := Transaction;
154	+	FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
155		FSQLDialect := SQLDialect;
156		FSQL := sql;
157		end;
158
159		constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
160	<	Transaction: ITransaction; sql: string; SQLDialect: integer;
160	>	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
161		GenerateParamNames: boolean);
162		begin
163		FHasParamNames := true;
#	Line 207 | Line 228 | begin
228		Result := FSQLStatementType;
229		end;
230
231	<	function TFBStatement.GetSQLText: string;
231	>	function TFBStatement.GetSQLText: AnsiString;
232		begin
233		Result := FSQL;
234		end;
235
236	+	function TFBStatement.GetProcessedSQLText: AnsiString;
237	+	begin
238	+	if FProcessedSQL = '' then
239	+	ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
240	+	Result := FProcessedSQL
241	+	end;
242	+
243		function TFBStatement.GetSQLDialect: integer;
244		begin
245		Result := FSQLDialect;
#	Line 246 | Line 274 | begin
274		Result := InternalOpenCursor(aTransaction);
275		end;
276
277	<	function TFBStatement.CreateBlob(paramName: string): IBlob;
277	>	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
278		var column: TColumnMetaData;
279		begin
280		InternalPrepare;
#	Line 262 | Line 290 | begin
290		Result := CreateBlob(SQLParams[index] as TSQLParam);
291		end;
292
293	<	function TFBStatement.CreateArray(paramName: string): IArray;
293	>	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
294		var column: TColumnMetaData;
295		begin
296		InternalPrepare;
#	Line 290 | Line 318 | end;
318
319		function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
320		begin
321	<	Result := TSQLInfoResultsBuffer.Create;
321	>	Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
322		GetDsqlInfo(Request,Result);
323		end;
324
#	Line 299 | Line 327 | begin
327		RetainInterfaces := aValue;
328		end;
329
330	+	procedure TFBStatement.EnableStatistics(aValue: boolean);
331	+	begin
332	+	if FCollectStatistics <> aValue then
333	+	begin
334	+	FCollectStatistics := aValue;
335	+	FStatisticsAvailable := false;
336	+	end;
337	+	end;
338	+
339	+	function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
340	+	begin
341	+	Result := FStatisticsAvailable;
342	+	if Result then
343	+	begin
344	+	stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
345	+	stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
346	+	stats[psMaxMemory] := FAfterStats[psMaxMemory];
347	+	stats[psRealTime] :=  FAfterStats[psRealTime] - FBeforeStats[psRealTime];
348	+	stats[psUserTime] :=  FAfterStats[psUserTime] - FBeforeStats[psUserTime];
349	+	stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
350	+	stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
351	+	stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
352	+	stats[psBuffers] :=  FAfterStats[psBuffers];
353	+	end;
354	+	end;
355	+
356		end.
357

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