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 |
tony |
345 |
const
|
48 |
|
|
DefaultBatchRowLimit = 1000;
|
49 |
|
|
|
50 |
tony |
45 |
type
|
51 |
tony |
209 |
TPerfStatistics = array[psCurrentMemory..psFetches] of Int64;
|
52 |
tony |
45 |
|
53 |
|
|
{ TFBStatement }
|
54 |
|
|
|
55 |
tony |
315 |
TFBStatement = class(TActivityReporter,ITransactionUser)
|
56 |
tony |
45 |
private
|
57 |
|
|
FAttachmentIntf: IAttachment;
|
58 |
tony |
263 |
FFirebirdClientAPI: TFBClientAPI;
|
59 |
tony |
45 |
protected
|
60 |
|
|
FTransactionIntf: ITransaction;
|
61 |
|
|
FExecTransactionIntf: ITransaction;
|
62 |
tony |
347 |
FStaleReferenceChecks: boolean;
|
63 |
tony |
45 |
FSQLStatementType: TIBSQLStatementTypes; { Select, update, delete, insert, create, alter, etc...}
|
64 |
|
|
FSQLDialect: integer;
|
65 |
|
|
FOpen: boolean;
|
66 |
|
|
FPrepared: boolean;
|
67 |
|
|
FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
|
68 |
tony |
56 |
FSQL: AnsiString;
|
69 |
|
|
FProcessedSQL: AnsiString;
|
70 |
tony |
45 |
FHasParamNames: boolean;
|
71 |
|
|
FBOF: boolean;
|
72 |
|
|
FEOF: boolean;
|
73 |
|
|
FSingleResults: boolean;
|
74 |
|
|
FGenerateParamNames: boolean;
|
75 |
|
|
FChangeSeqNo: integer;
|
76 |
tony |
47 |
FCollectStatistics: boolean;
|
77 |
|
|
FStatisticsAvailable: boolean;
|
78 |
|
|
FBeforeStats: TPerfStatistics;
|
79 |
|
|
FAfterStats: TPerfStatistics;
|
80 |
tony |
270 |
FCaseSensitiveParams: boolean;
|
81 |
tony |
345 |
FBatchRowLimit: integer;
|
82 |
|
|
procedure CheckChangeBatchRowLimit; virtual;
|
83 |
tony |
45 |
procedure CheckHandle; virtual; abstract;
|
84 |
|
|
procedure CheckTransaction(aTransaction: ITransaction);
|
85 |
tony |
363 |
procedure DoJournaling;
|
86 |
|
|
function GetJournalIntf: IJournallingHook;
|
87 |
|
|
function GetStatementIntf: IStatement; virtual; abstract;
|
88 |
tony |
45 |
procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
|
89 |
tony |
350 |
procedure InternalPrepare(CursorName: AnsiString=''); virtual; abstract;
|
90 |
tony |
345 |
function InternalExecute(Transaction: ITransaction): IResults; virtual; abstract;
|
91 |
tony |
350 |
function InternalOpenCursor(aTransaction: ITransaction; Scrollable: boolean): IResultSet; virtual; abstract;
|
92 |
tony |
263 |
procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
|
93 |
tony |
45 |
procedure FreeHandle; virtual; abstract;
|
94 |
|
|
procedure InternalClose(Force: boolean); virtual; abstract;
|
95 |
tony |
209 |
function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
|
96 |
tony |
45 |
public
|
97 |
|
|
constructor Create(Attachment: IAttachment; Transaction: ITransaction;
|
98 |
tony |
56 |
sql: AnsiString; SQLDialect: integer);
|
99 |
tony |
45 |
constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
|
100 |
tony |
270 |
sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false;
|
101 |
|
|
CaseSensitiveParams: boolean = false);
|
102 |
tony |
45 |
destructor Destroy; override;
|
103 |
|
|
procedure Close;
|
104 |
|
|
procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
|
105 |
|
|
property SQLDialect: integer read FSQLDialect;
|
106 |
tony |
263 |
property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;
|
107 |
tony |
45 |
|
108 |
|
|
public
|
109 |
|
|
function GetSQLParams: ISQLParams; virtual; abstract;
|
110 |
|
|
function GetMetaData: IMetaData; virtual; abstract;
|
111 |
|
|
function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
|
112 |
|
|
DeleteCount: integer): boolean;
|
113 |
|
|
function GetSQLStatementType: TIBSQLStatementTypes;
|
114 |
tony |
345 |
function GetSQLStatementTypeName: AnsiString;
|
115 |
tony |
56 |
function GetSQLText: AnsiString;
|
116 |
tony |
263 |
function GetProcessedSQLText: AnsiString;
|
117 |
tony |
45 |
function GetSQLDialect: integer;
|
118 |
tony |
359 |
function GetFlags: TStatementFlags; virtual;
|
119 |
tony |
45 |
|
120 |
|
|
{GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
|
121 |
tony |
350 |
procedure Prepare(aTransaction: ITransaction=nil); overload;
|
122 |
|
|
procedure Prepare(CursorName: AnsiString; aTransaction: ITransaction=nil); overload; virtual;
|
123 |
tony |
45 |
function Execute(aTransaction: ITransaction=nil): IResults;
|
124 |
tony |
350 |
function OpenCursor(aTransaction: ITransaction=nil): IResultSet; overload;
|
125 |
|
|
function OpenCursor(Scrollable: boolean; aTransaction: ITransaction=nil): IResultSet; overload;
|
126 |
tony |
56 |
function CreateBlob(paramName: AnsiString): IBlob; overload;
|
127 |
tony |
45 |
function CreateBlob(index: integer): IBlob; overload;
|
128 |
|
|
function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
|
129 |
tony |
56 |
function CreateArray(paramName: AnsiString): IArray; overload;
|
130 |
tony |
45 |
function CreateArray(index: integer): IArray; overload;
|
131 |
|
|
function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
|
132 |
|
|
function GetAttachment: IAttachment;
|
133 |
|
|
function GetTransaction: ITransaction;
|
134 |
|
|
function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
|
135 |
|
|
procedure SetRetainInterfaces(aValue: boolean); virtual;
|
136 |
tony |
47 |
procedure EnableStatistics(aValue: boolean);
|
137 |
|
|
function GetPerfStatistics(var stats: TPerfCounters): boolean;
|
138 |
tony |
345 |
function IsInBatchMode: boolean; virtual;
|
139 |
|
|
function HasBatchMode: boolean; virtual;
|
140 |
|
|
public
|
141 |
|
|
{IBatch support}
|
142 |
|
|
procedure AddToBatch; virtual;
|
143 |
|
|
function ExecuteBatch(aTransaction: ITransaction): IBatchCompletion; virtual;
|
144 |
|
|
procedure CancelBatch; virtual;
|
145 |
|
|
function GetBatchCompletion: IBatchCompletion; virtual;
|
146 |
|
|
function GetBatchRowLimit: integer;
|
147 |
|
|
procedure SetBatchRowLimit(aLimit: integer);
|
148 |
tony |
347 |
{Stale Reference Check}
|
149 |
|
|
procedure SetStaleReferenceChecks(Enable:boolean); {default true}
|
150 |
|
|
function GetStaleReferenceChecks: boolean;
|
151 |
tony |
345 |
public
|
152 |
tony |
45 |
property ChangeSeqNo: integer read FChangeSeqNo;
|
153 |
|
|
property SQLParams: ISQLParams read GetSQLParams;
|
154 |
|
|
property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
|
155 |
|
|
end;
|
156 |
|
|
|
157 |
|
|
implementation
|
158 |
|
|
|
159 |
|
|
uses FBMessages;
|
160 |
|
|
|
161 |
|
|
{ TFBStatement }
|
162 |
|
|
|
163 |
tony |
345 |
procedure TFBStatement.CheckChangeBatchRowLimit;
|
164 |
|
|
begin
|
165 |
|
|
//Do Nothing
|
166 |
|
|
end;
|
167 |
|
|
|
168 |
tony |
45 |
procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
|
169 |
|
|
begin
|
170 |
|
|
if (aTransaction = nil) then
|
171 |
|
|
IBError(ibxeTransactionNotAssigned,[]);
|
172 |
|
|
|
173 |
|
|
if not aTransaction.InTransaction then
|
174 |
|
|
IBError(ibxeNotInTransaction,[]);
|
175 |
|
|
end;
|
176 |
|
|
|
177 |
tony |
363 |
procedure TFBStatement.DoJournaling;
|
178 |
|
|
function doGetRowsAffected: integer;
|
179 |
|
|
var a,i,u,d: integer;
|
180 |
|
|
begin
|
181 |
|
|
GetRowsAffected(a,i,u,d);
|
182 |
|
|
Result := i + u + d;
|
183 |
|
|
end;
|
184 |
|
|
|
185 |
|
|
var RowsAffected: integer;
|
186 |
|
|
begin
|
187 |
|
|
RowsAffected := doGetRowsAffected;
|
188 |
|
|
with GetAttachment do
|
189 |
|
|
if JournalingActive and
|
190 |
|
|
(((joReadOnlyQueries in GetJournalOptions) and (RowsAffected = 0)) or
|
191 |
|
|
((joModifyQueries in GetJournalOptions) and (RowsAffected > 0))) then
|
192 |
|
|
GetJournalIntf.ExecQuery(GetStatementIntf);
|
193 |
|
|
end;
|
194 |
|
|
|
195 |
|
|
function TFBStatement.GetJournalIntf: IJournallingHook;
|
196 |
|
|
begin
|
197 |
|
|
GetAttachment.QueryInterface(IJournallingHook,Result)
|
198 |
|
|
end;
|
199 |
|
|
|
200 |
tony |
209 |
function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
|
201 |
|
|
begin
|
202 |
|
|
Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
|
203 |
|
|
end;
|
204 |
|
|
|
205 |
tony |
45 |
constructor TFBStatement.Create(Attachment: IAttachment;
|
206 |
tony |
56 |
Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
|
207 |
tony |
45 |
begin
|
208 |
|
|
inherited Create(Transaction as TFBTransaction,2);
|
209 |
|
|
FAttachmentIntf := Attachment;
|
210 |
|
|
FTransactionIntf := Transaction;
|
211 |
tony |
263 |
FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
|
212 |
tony |
45 |
FSQLDialect := SQLDialect;
|
213 |
|
|
FSQL := sql;
|
214 |
tony |
345 |
FBatchRowLimit := DefaultBatchRowLimit;
|
215 |
tony |
347 |
FStaleReferenceChecks := true;
|
216 |
tony |
45 |
end;
|
217 |
|
|
|
218 |
|
|
constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
|
219 |
tony |
56 |
Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
|
220 |
tony |
270 |
GenerateParamNames: boolean; CaseSensitiveParams: boolean);
|
221 |
tony |
45 |
begin
|
222 |
|
|
FHasParamNames := true;
|
223 |
|
|
FGenerateParamNames := GenerateParamNames;
|
224 |
tony |
270 |
FCaseSensitiveParams := CaseSensitiveParams;
|
225 |
tony |
45 |
Create(Attachment,Transaction,sql,SQLDialect);
|
226 |
|
|
end;
|
227 |
|
|
|
228 |
|
|
destructor TFBStatement.Destroy;
|
229 |
|
|
begin
|
230 |
|
|
Close;
|
231 |
|
|
FreeHandle;
|
232 |
|
|
inherited Destroy;
|
233 |
|
|
end;
|
234 |
|
|
|
235 |
|
|
procedure TFBStatement.Close;
|
236 |
|
|
begin
|
237 |
|
|
InternalClose(false);
|
238 |
|
|
end;
|
239 |
|
|
|
240 |
|
|
procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
|
241 |
|
|
Force: boolean);
|
242 |
|
|
begin
|
243 |
tony |
315 |
if FOpen and ((FExecTransactionIntf as TObject) = (aTransaction as TObject)) then
|
244 |
tony |
45 |
InternalClose(Force);
|
245 |
|
|
|
246 |
|
|
if FTransactionIntf = aTransaction then
|
247 |
|
|
begin
|
248 |
|
|
FreeHandle;
|
249 |
|
|
FPrepared := false;
|
250 |
|
|
end;
|
251 |
|
|
end;
|
252 |
|
|
|
253 |
|
|
function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
|
254 |
|
|
UpdateCount, DeleteCount: integer): boolean;
|
255 |
|
|
var
|
256 |
|
|
RB: ISQLInfoResults;
|
257 |
|
|
i, j: integer;
|
258 |
|
|
begin
|
259 |
|
|
InsertCount := 0;
|
260 |
|
|
UpdateCount := 0;
|
261 |
|
|
DeleteCount := 0;
|
262 |
|
|
Result := FPrepared;
|
263 |
|
|
if not Result then Exit;
|
264 |
|
|
|
265 |
|
|
RB := GetDsqlInfo(isc_info_sql_records);
|
266 |
|
|
|
267 |
|
|
for i := 0 to RB.Count - 1 do
|
268 |
|
|
with RB[i] do
|
269 |
|
|
case getItemType of
|
270 |
|
|
isc_info_sql_records:
|
271 |
|
|
for j := 0 to Count -1 do
|
272 |
|
|
with Items[j] do
|
273 |
|
|
case getItemType of
|
274 |
|
|
isc_info_req_select_count:
|
275 |
|
|
SelectCount := GetAsInteger;
|
276 |
|
|
isc_info_req_insert_count:
|
277 |
|
|
InsertCount := GetAsInteger;
|
278 |
|
|
isc_info_req_update_count:
|
279 |
|
|
UpdateCount := GetAsInteger;
|
280 |
|
|
isc_info_req_delete_count:
|
281 |
|
|
DeleteCount := GetAsInteger;
|
282 |
|
|
end;
|
283 |
|
|
end;
|
284 |
|
|
end;
|
285 |
|
|
|
286 |
|
|
function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
|
287 |
|
|
begin
|
288 |
|
|
Result := FSQLStatementType;
|
289 |
|
|
end;
|
290 |
|
|
|
291 |
tony |
345 |
function TFBStatement.GetSQLStatementTypeName: AnsiString;
|
292 |
|
|
begin
|
293 |
|
|
case FSQLStatementType of
|
294 |
|
|
SQLUnknown: Result := 'SQL_Unknown';
|
295 |
|
|
SQLSelect: Result := 'SQL_Select';
|
296 |
|
|
SQLInsert: Result := 'SQL_Insert';
|
297 |
|
|
SQLUpdate: Result := 'SQL_Update';
|
298 |
|
|
SQLDelete: Result := 'SQL_Delete';
|
299 |
|
|
SQLDDL: Result := 'SQL_DDL';
|
300 |
|
|
SQLGetSegment: Result := 'SQL_GetSegment';
|
301 |
|
|
SQLPutSegment: Result := 'SQL_PutSegment';
|
302 |
|
|
SQLExecProcedure: Result := 'SQL_ExecProcedure';
|
303 |
|
|
SQLStartTransaction: Result := 'SQL_StartTransaction';
|
304 |
|
|
SQLCommit: Result := 'SQL_Commit';
|
305 |
|
|
SQLRollback: Result := 'SQL_Rollback';
|
306 |
|
|
SQLSelectForUpdate: Result := 'SQL_SelectForUpdate';
|
307 |
|
|
SQLSetGenerator: Result := 'SQL_SetGenerator';
|
308 |
|
|
SQLSavePoint: Result := 'SQL_SavePoint';
|
309 |
|
|
end;
|
310 |
|
|
end;
|
311 |
|
|
|
312 |
tony |
56 |
function TFBStatement.GetSQLText: AnsiString;
|
313 |
tony |
45 |
begin
|
314 |
|
|
Result := FSQL;
|
315 |
|
|
end;
|
316 |
|
|
|
317 |
tony |
263 |
function TFBStatement.GetProcessedSQLText: AnsiString;
|
318 |
|
|
begin
|
319 |
tony |
359 |
if not FHasParamNames then
|
320 |
|
|
Result := FSQL
|
321 |
|
|
else
|
322 |
|
|
begin
|
323 |
|
|
if FProcessedSQL = '' then
|
324 |
|
|
ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
|
325 |
|
|
Result := FProcessedSQL;
|
326 |
|
|
end;
|
327 |
tony |
263 |
end;
|
328 |
|
|
|
329 |
tony |
45 |
function TFBStatement.GetSQLDialect: integer;
|
330 |
|
|
begin
|
331 |
|
|
Result := FSQLDialect;
|
332 |
|
|
end;
|
333 |
|
|
|
334 |
tony |
359 |
function TFBStatement.GetFlags: TStatementFlags;
|
335 |
|
|
begin
|
336 |
|
|
Result := [];
|
337 |
|
|
end;
|
338 |
|
|
|
339 |
tony |
45 |
procedure TFBStatement.Prepare(aTransaction: ITransaction);
|
340 |
|
|
begin
|
341 |
tony |
350 |
Prepare('',aTransaction);
|
342 |
|
|
end;
|
343 |
|
|
|
344 |
|
|
procedure TFBStatement.Prepare(CursorName: AnsiString;
|
345 |
|
|
aTransaction: ITransaction);
|
346 |
|
|
begin
|
347 |
tony |
45 |
if FPrepared then FreeHandle;
|
348 |
|
|
if aTransaction <> nil then
|
349 |
|
|
begin
|
350 |
|
|
RemoveMonitor(FTransactionIntf as TFBTransaction);
|
351 |
|
|
FTransactionIntf := aTransaction;
|
352 |
|
|
AddMonitor(FTransactionIntf as TFBTransaction);
|
353 |
|
|
end;
|
354 |
tony |
350 |
InternalPrepare(CursorName);
|
355 |
tony |
45 |
end;
|
356 |
|
|
|
357 |
|
|
function TFBStatement.Execute(aTransaction: ITransaction): IResults;
|
358 |
|
|
begin
|
359 |
|
|
if aTransaction = nil then
|
360 |
|
|
Result := InternalExecute(FTransactionIntf)
|
361 |
|
|
else
|
362 |
|
|
Result := InternalExecute(aTransaction);
|
363 |
tony |
363 |
DoJournaling;
|
364 |
tony |
45 |
end;
|
365 |
|
|
|
366 |
tony |
345 |
procedure TFBStatement.AddToBatch;
|
367 |
|
|
begin
|
368 |
|
|
IBError(ibxeBatchModeNotSupported,[]);
|
369 |
|
|
end;
|
370 |
|
|
|
371 |
|
|
function TFBStatement.ExecuteBatch(aTransaction: ITransaction
|
372 |
|
|
): IBatchCompletion;
|
373 |
|
|
begin
|
374 |
|
|
IBError(ibxeBatchModeNotSupported,[]);
|
375 |
|
|
end;
|
376 |
|
|
|
377 |
|
|
procedure TFBStatement.CancelBatch;
|
378 |
|
|
begin
|
379 |
|
|
IBError(ibxeBatchModeNotSupported,[]);
|
380 |
|
|
end;
|
381 |
|
|
|
382 |
|
|
function TFBStatement.GetBatchCompletion: IBatchCompletion;
|
383 |
|
|
begin
|
384 |
|
|
IBError(ibxeBatchModeNotSupported,[]);
|
385 |
|
|
end;
|
386 |
|
|
|
387 |
|
|
function TFBStatement.GetBatchRowLimit: integer;
|
388 |
|
|
begin
|
389 |
|
|
Result := FBatchRowLimit;
|
390 |
|
|
end;
|
391 |
|
|
|
392 |
|
|
procedure TFBStatement.SetBatchRowLimit(aLimit: integer);
|
393 |
|
|
begin
|
394 |
|
|
CheckChangeBatchRowLimit;
|
395 |
|
|
FBatchRowLimit := aLimit;
|
396 |
|
|
end;
|
397 |
|
|
|
398 |
tony |
347 |
procedure TFBStatement.SetStaleReferenceChecks(Enable: boolean);
|
399 |
|
|
begin
|
400 |
|
|
FStaleReferenceChecks := Enable;
|
401 |
|
|
end;
|
402 |
|
|
|
403 |
|
|
function TFBStatement.GetStaleReferenceChecks: boolean;
|
404 |
|
|
begin
|
405 |
|
|
Result := FStaleReferenceChecks;
|
406 |
|
|
end;
|
407 |
|
|
|
408 |
tony |
45 |
function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
|
409 |
|
|
begin
|
410 |
tony |
350 |
Result := OpenCursor(false,aTransaction);
|
411 |
|
|
end;
|
412 |
|
|
|
413 |
|
|
function TFBStatement.OpenCursor(Scrollable: boolean; aTransaction: ITransaction
|
414 |
|
|
): IResultSet;
|
415 |
|
|
begin
|
416 |
tony |
45 |
Close;
|
417 |
|
|
if aTransaction = nil then
|
418 |
tony |
350 |
Result := InternalOpenCursor(FTransactionIntf,Scrollable)
|
419 |
tony |
45 |
else
|
420 |
tony |
350 |
Result := InternalOpenCursor(aTransaction,Scrollable);
|
421 |
tony |
363 |
DoJournaling;
|
422 |
tony |
45 |
end;
|
423 |
|
|
|
424 |
tony |
56 |
function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
|
425 |
tony |
45 |
var column: TColumnMetaData;
|
426 |
|
|
begin
|
427 |
|
|
InternalPrepare;
|
428 |
|
|
column := SQLParams.ByName(paramName) as TSQLParam;
|
429 |
|
|
if column = nil then
|
430 |
|
|
IBError(ibxeFieldNotFound,[paramName]);
|
431 |
|
|
Result := CreateBlob(column);
|
432 |
|
|
end;
|
433 |
|
|
|
434 |
|
|
function TFBStatement.CreateBlob(index: integer): IBlob;
|
435 |
|
|
begin
|
436 |
|
|
InternalPrepare;
|
437 |
|
|
Result := CreateBlob(SQLParams[index] as TSQLParam);
|
438 |
|
|
end;
|
439 |
|
|
|
440 |
tony |
56 |
function TFBStatement.CreateArray(paramName: AnsiString): IArray;
|
441 |
tony |
45 |
var column: TColumnMetaData;
|
442 |
|
|
begin
|
443 |
|
|
InternalPrepare;
|
444 |
|
|
column := SQLParams.ByName(paramName) as TSQLParam;
|
445 |
|
|
if column = nil then
|
446 |
|
|
IBError(ibxeFieldNotFound,[paramName]);
|
447 |
|
|
Result := CreateArray(column);
|
448 |
|
|
end;
|
449 |
|
|
|
450 |
|
|
function TFBStatement.CreateArray(index: integer): IArray;
|
451 |
|
|
begin
|
452 |
|
|
InternalPrepare;
|
453 |
|
|
Result := CreateArray(SQLParams[index] as TSQLParam);
|
454 |
|
|
end;
|
455 |
|
|
|
456 |
|
|
function TFBStatement.GetAttachment: IAttachment;
|
457 |
|
|
begin
|
458 |
|
|
Result := FAttachmentIntf;
|
459 |
|
|
end;
|
460 |
|
|
|
461 |
|
|
function TFBStatement.GetTransaction: ITransaction;
|
462 |
|
|
begin
|
463 |
|
|
Result := FTransactionIntf
|
464 |
|
|
end;
|
465 |
|
|
|
466 |
|
|
function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
|
467 |
|
|
begin
|
468 |
tony |
263 |
Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
|
469 |
tony |
45 |
GetDsqlInfo(Request,Result);
|
470 |
|
|
end;
|
471 |
|
|
|
472 |
|
|
procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
|
473 |
|
|
begin
|
474 |
|
|
RetainInterfaces := aValue;
|
475 |
|
|
end;
|
476 |
|
|
|
477 |
tony |
47 |
procedure TFBStatement.EnableStatistics(aValue: boolean);
|
478 |
|
|
begin
|
479 |
|
|
if FCollectStatistics <> aValue then
|
480 |
|
|
begin
|
481 |
|
|
FCollectStatistics := aValue;
|
482 |
|
|
FStatisticsAvailable := false;
|
483 |
|
|
end;
|
484 |
|
|
end;
|
485 |
|
|
|
486 |
|
|
function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
|
487 |
|
|
begin
|
488 |
|
|
Result := FStatisticsAvailable;
|
489 |
|
|
if Result then
|
490 |
|
|
begin
|
491 |
|
|
stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
|
492 |
|
|
stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
|
493 |
|
|
stats[psMaxMemory] := FAfterStats[psMaxMemory];
|
494 |
|
|
stats[psRealTime] := FAfterStats[psRealTime] - FBeforeStats[psRealTime];
|
495 |
|
|
stats[psUserTime] := FAfterStats[psUserTime] - FBeforeStats[psUserTime];
|
496 |
|
|
stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
|
497 |
|
|
stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
|
498 |
|
|
stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
|
499 |
|
|
stats[psBuffers] := FAfterStats[psBuffers];
|
500 |
|
|
end;
|
501 |
|
|
end;
|
502 |
|
|
|
503 |
tony |
345 |
function TFBStatement.IsInBatchMode: boolean;
|
504 |
|
|
begin
|
505 |
|
|
Result := false;
|
506 |
|
|
end;
|
507 |
|
|
|
508 |
|
|
function TFBStatement.HasBatchMode: boolean;
|
509 |
|
|
begin
|
510 |
|
|
Result := false;
|
511 |
|
|
end;
|
512 |
|
|
|
513 |
tony |
45 |
end.
|
514 |
|
|
|