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 |
|
|
{************************************************************************}
|
31 |
|
|
{ }
|
32 |
|
|
{ Borland Delphi Visual Component Library }
|
33 |
|
|
{ InterBase Express core components }
|
34 |
|
|
{ }
|
35 |
|
|
{ Copyright (c) 1998-2000 Inprise Corporation }
|
36 |
|
|
{ }
|
37 |
|
|
{ InterBase Express is based in part on the product }
|
38 |
|
|
{ Free IB Components, written by Gregory H. Deatz for }
|
39 |
|
|
{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
|
40 |
|
|
{ Free IB Components is used under license. }
|
41 |
|
|
{ }
|
42 |
|
|
{ The contents of this file are subject to the InterBase }
|
43 |
|
|
{ Public License Version 1.0 (the "License"); you may not }
|
44 |
|
|
{ use this file except in compliance with the License. You }
|
45 |
|
|
{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
|
46 |
|
|
{ Software distributed under the License is distributed on }
|
47 |
|
|
{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
|
48 |
|
|
{ express or implied. See the License for the specific language }
|
49 |
|
|
{ governing rights and limitations under the License. }
|
50 |
|
|
{ The Original Code was created by InterBase Software Corporation }
|
51 |
|
|
{ and its successors. }
|
52 |
|
|
{ Portions created by Inprise Corporation are Copyright (C) Inprise }
|
53 |
|
|
{ Corporation. All Rights Reserved. }
|
54 |
|
|
{ Contributor(s): Jeff Overcash }
|
55 |
|
|
{ }
|
56 |
|
|
{ IBX For Lazarus (Firebird Express) }
|
57 |
|
|
{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
|
58 |
|
|
{ Portions created by MWA Software are copyright McCallum Whyman }
|
59 |
|
|
{ Associates Ltd 2011 - 2015 }
|
60 |
|
|
{ }
|
61 |
|
|
{************************************************************************}
|
62 |
|
|
unit FB25Statement;
|
63 |
|
|
|
64 |
|
|
{$IFDEF FPC}
|
65 |
|
|
{$mode objfpc}{$H+}
|
66 |
|
|
{$codepage UTF8}
|
67 |
|
|
{$interfaces COM}
|
68 |
|
|
{$ENDIF}
|
69 |
|
|
|
70 |
|
|
{This unit is hacked from IBSQL and contains the code for managing an XSQLDA and
|
71 |
|
|
SQLVars, along with statement preparation, execution and cursor management.
|
72 |
|
|
Most of the SQLVar code has been moved to unit FBSQLData. Client access is
|
73 |
|
|
provided through interface rather than direct access to the XSQLDA and XSQLVar
|
74 |
|
|
objects.}
|
75 |
|
|
|
76 |
|
|
{
|
77 |
|
|
Note on reference counted interfaces.
|
78 |
|
|
------------------------------------
|
79 |
|
|
|
80 |
|
|
TFB25Statement manages both an input and an output SQLDA through the TIBXINPUTSQLDA
|
81 |
|
|
and TIBXOUTPUTSQLDA objects. As pure objects, these are explicitly destroyed
|
82 |
|
|
when the statement is destroyed.
|
83 |
|
|
|
84 |
|
|
However, IResultSet is an interface and is returned when a cursor is opened and
|
85 |
|
|
has a reference for the TIBXOUTPUTSQLDA. The user may discard their reference
|
86 |
|
|
to the IStatement while still using the IResultSet. This would be a problem if t
|
87 |
|
|
he underlying TFB25Statement object and its TIBXOUTPUTSQLDA is destroyed while
|
88 |
|
|
still leaving the TIBXResultSet object in place. Calls to (e.g.) FetchNext would fail.
|
89 |
|
|
|
90 |
|
|
To avoid this problem, TResultsSet objects have a reference to the IStatement
|
91 |
|
|
interface of the TFB25Statement object. Thus, as long as these "copies" exist,
|
92 |
|
|
the owning statement is not destroyed even if the user discards their reference
|
93 |
|
|
to the statement. Note: the TFB25Statement does not have a reference to the TIBXResultSet
|
94 |
|
|
interface. This way circular references are avoided.
|
95 |
|
|
|
96 |
|
|
To avoid an IResultSet interface being kept too long and no longer synchronised
|
97 |
|
|
with the query, each statement includes a prepare sequence number, incremented
|
98 |
|
|
each time the query is prepared. When the IResultSet interface is created, it
|
99 |
|
|
noted the current prepare sequence number. Whe an IResult interface is accessed
|
100 |
|
|
it checks this number against the statement's current prepare sequence number.
|
101 |
|
|
If not the same, an error is raised.
|
102 |
|
|
|
103 |
|
|
A similar strategy is used for the IMetaData, IResults and ISQLParams interfaces.
|
104 |
|
|
}
|
105 |
|
|
|
106 |
|
|
interface
|
107 |
|
|
|
108 |
|
|
uses
|
109 |
|
|
Classes, SysUtils, IB, FBClientAPI, FB25ClientAPI, FB25Transaction, FB25Attachment,
|
110 |
|
|
IBHeader, IBExternals, FBSQLData, FBOutputBlock, FBStatement, FBActivityMonitor;
|
111 |
|
|
|
112 |
|
|
type
|
113 |
|
|
TFB25Statement = class;
|
114 |
|
|
TIBXSQLDA = class;
|
115 |
|
|
|
116 |
|
|
{ TIBXSQLVAR }
|
117 |
|
|
|
118 |
|
|
TIBXSQLVAR = class(TSQLVarData)
|
119 |
|
|
private
|
120 |
|
|
FStatement: TFB25Statement;
|
121 |
|
|
FBlob: IBlob; {Cache references}
|
122 |
|
|
FArray: IArray;
|
123 |
|
|
FNullIndicator: short;
|
124 |
|
|
FOwnsSQLData: boolean;
|
125 |
|
|
FBlobMetaData: IBlobMetaData;
|
126 |
|
|
FArrayMetaData: IArrayMetaData;
|
127 |
|
|
FXSQLVAR: PXSQLVAR; { Points to the PXSQLVAR in the owner object }
|
128 |
|
|
protected
|
129 |
|
|
function GetSQLType: cardinal; override;
|
130 |
|
|
function GetSubtype: integer; override;
|
131 |
|
|
function GetAliasName: string; override;
|
132 |
|
|
function GetFieldName: string; override;
|
133 |
|
|
function GetOwnerName: string; override;
|
134 |
|
|
function GetRelationName: string; override;
|
135 |
|
|
function GetScale: integer; override;
|
136 |
|
|
function GetCharSetID: cardinal; override;
|
137 |
|
|
function GetCodePage: TSystemCodePage; override;
|
138 |
|
|
function GetIsNull: Boolean; override;
|
139 |
|
|
function GetIsNullable: boolean; override;
|
140 |
|
|
function GetSQLData: PChar; override;
|
141 |
|
|
function GetDataLength: cardinal; override;
|
142 |
|
|
procedure SetIsNull(Value: Boolean); override;
|
143 |
|
|
procedure SetIsNullable(Value: Boolean); override;
|
144 |
|
|
procedure SetSQLData(AValue: PChar; len: cardinal); override;
|
145 |
|
|
procedure SetScale(aValue: integer); override;
|
146 |
|
|
procedure SetDataLength(len: cardinal); override;
|
147 |
|
|
procedure SetSQLType(aValue: cardinal); override;
|
148 |
|
|
procedure SetCharSetID(aValue: cardinal); override;
|
149 |
|
|
public
|
150 |
|
|
constructor Create(aParent: TIBXSQLDA; aIndex: integer);
|
151 |
|
|
procedure FreeSQLData;
|
152 |
|
|
procedure RowChange; override;
|
153 |
|
|
function GetAsArray(Array_ID: TISC_QUAD): IArray; override;
|
154 |
|
|
function GetAsBlob(Blob_ID: TISC_QUAD; BPB: IBPB): IBlob; override;
|
155 |
|
|
function GetArrayMetaData: IArrayMetaData; override;
|
156 |
|
|
function GetBlobMetaData: IBlobMetaData; override;
|
157 |
|
|
function CreateBlob: IBlob; override;
|
158 |
|
|
procedure Initialize; override;
|
159 |
|
|
|
160 |
|
|
property Statement: TFB25Statement read FStatement;
|
161 |
|
|
end;
|
162 |
|
|
|
163 |
|
|
TIBXINPUTSQLDA = class;
|
164 |
|
|
|
165 |
|
|
{ TIBXSQLDA }
|
166 |
|
|
|
167 |
|
|
TIBXSQLDA = class(TSQLDataArea)
|
168 |
|
|
private
|
169 |
|
|
FCount: Integer; {Columns in use - may be less than inherited columns}
|
170 |
|
|
FSize: Integer; {Number of TIBXSQLVARs in column list}
|
171 |
|
|
FXSQLDA: PXSQLDA;
|
172 |
|
|
FTransactionSeqNo: integer;
|
173 |
|
|
function GetRecordSize: Integer;
|
174 |
|
|
function GetXSQLDA: PXSQLDA;
|
175 |
|
|
protected
|
176 |
|
|
FStatement: TFB25Statement;
|
177 |
|
|
function GetTransactionSeqNo: integer; override;
|
178 |
|
|
procedure FreeXSQLDA;
|
179 |
|
|
function GetStatement: IStatement; override;
|
180 |
|
|
function GetPrepareSeqNo: integer; override;
|
181 |
|
|
procedure SetCount(Value: Integer); override;
|
182 |
|
|
public
|
183 |
|
|
constructor Create(aStatement: TFB25Statement);
|
184 |
|
|
destructor Destroy; override;
|
185 |
|
|
function CheckStatementStatus(Request: TStatementStatus): boolean; override;
|
186 |
|
|
function ColumnsInUseCount: integer; override;
|
187 |
|
|
function GetTransaction: TFB25Transaction; virtual;
|
188 |
|
|
procedure Initialize; override;
|
189 |
|
|
function StateChanged(var ChangeSeqNo: integer): boolean; override;
|
190 |
|
|
property AsXSQLDA: PXSQLDA read GetXSQLDA;
|
191 |
|
|
property Count: Integer read FCount write SetCount;
|
192 |
|
|
property RecordSize: Integer read GetRecordSize;
|
193 |
|
|
property Statement: TFB25Statement read FStatement;
|
194 |
|
|
end;
|
195 |
|
|
|
196 |
|
|
{ TIBXINPUTSQLDA }
|
197 |
|
|
|
198 |
|
|
TIBXINPUTSQLDA = class(TIBXSQLDA)
|
199 |
|
|
public
|
200 |
|
|
procedure Bind;
|
201 |
|
|
function IsInputDataArea: boolean; override;
|
202 |
|
|
end;
|
203 |
|
|
|
204 |
|
|
|
205 |
|
|
{ TIBXOUTPUTSQLDA }
|
206 |
|
|
|
207 |
|
|
TIBXOUTPUTSQLDA = class(TIBXSQLDA)
|
208 |
|
|
private
|
209 |
|
|
FTransaction: TFB25Transaction; {transaction used to execute the statement}
|
210 |
|
|
public
|
211 |
|
|
procedure Bind;
|
212 |
|
|
function GetTransaction: TFB25Transaction; override;
|
213 |
|
|
procedure GetData(index: integer; var aIsNull: boolean; var len: short;
|
214 |
|
|
var data: PChar); override;
|
215 |
|
|
function IsInputDataArea: boolean; override;
|
216 |
|
|
end;
|
217 |
|
|
|
218 |
|
|
{ TResultSet }
|
219 |
|
|
|
220 |
|
|
TResultSet = class(TResults,IResultSet)
|
221 |
|
|
private
|
222 |
|
|
FResults: TIBXOUTPUTSQLDA;
|
223 |
|
|
FCursorSeqNo: integer;
|
224 |
|
|
public
|
225 |
|
|
constructor Create(aResults: TIBXOUTPUTSQLDA);
|
226 |
|
|
destructor Destroy; override;
|
227 |
|
|
{IResultSet}
|
228 |
|
|
function FetchNext: boolean;
|
229 |
|
|
function GetCursorName: string;
|
230 |
|
|
function GetTransaction: ITransaction; override;
|
231 |
|
|
function IsEof: boolean;
|
232 |
|
|
procedure Close;
|
233 |
|
|
end;
|
234 |
|
|
|
235 |
|
|
{ TFB25Statement }
|
236 |
|
|
|
237 |
|
|
TFB25Statement = class(TFBStatement,IStatement)
|
238 |
|
|
private
|
239 |
|
|
FDBHandle: TISC_DB_HANDLE;
|
240 |
|
|
FHandle: TISC_STMT_HANDLE;
|
241 |
|
|
FSQLParams: TIBXINPUTSQLDA;
|
242 |
|
|
FSQLRecord: TIBXOUTPUTSQLDA;
|
243 |
|
|
FCursor: String; { Cursor name...}
|
244 |
|
|
FCursorSeqNo: integer;
|
245 |
|
|
protected
|
246 |
|
|
procedure CheckHandle; override;
|
247 |
|
|
procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); override;
|
248 |
|
|
procedure InternalPrepare; override;
|
249 |
|
|
function InternalExecute(aTransaction: ITransaction): IResults; override;
|
250 |
|
|
function InternalOpenCursor(aTransaction: ITransaction): IResultSet; override;
|
251 |
|
|
procedure FreeHandle; override;
|
252 |
|
|
procedure InternalClose(Force: boolean); override;
|
253 |
|
|
public
|
254 |
|
|
constructor Create(Attachment: TFB25Attachment; Transaction: ITransaction;
|
255 |
|
|
sql: string; aSQLDialect: integer);
|
256 |
|
|
constructor CreateWithParameterNames(Attachment: TFB25Attachment;
|
257 |
|
|
Transaction: ITransaction; sql: string; aSQLDialect: integer; GenerateParamNames: boolean);
|
258 |
|
|
destructor Destroy; override;
|
259 |
|
|
function FetchNext: boolean;
|
260 |
|
|
|
261 |
|
|
public
|
262 |
|
|
{IStatement}
|
263 |
|
|
function GetSQLParams: ISQLParams; override;
|
264 |
|
|
function GetMetaData: IMetaData; override;
|
265 |
|
|
function GetPlan: String;
|
266 |
|
|
function IsPrepared: boolean;
|
267 |
|
|
function CreateBlob(column: TColumnMetaData): IBlob; override;
|
268 |
|
|
function CreateArray(column: TColumnMetaData): IArray; override;
|
269 |
|
|
procedure SetRetainInterfaces(aValue: boolean); override;
|
270 |
|
|
property Handle: TISC_STMT_HANDLE read FHandle;
|
271 |
|
|
|
272 |
|
|
end;
|
273 |
|
|
|
274 |
|
|
implementation
|
275 |
|
|
|
276 |
|
|
uses IBUtils, FBMessages, FB25Blob, variants, IBErrorCodes, FBArray, FB25Array;
|
277 |
|
|
|
278 |
|
|
|
279 |
|
|
{ TIBXSQLVAR }
|
280 |
|
|
|
281 |
|
|
function TIBXSQLVAR.GetSQLType: cardinal;
|
282 |
|
|
begin
|
283 |
|
|
result := FXSQLVAR^.sqltype and (not 1);
|
284 |
|
|
end;
|
285 |
|
|
|
286 |
|
|
function TIBXSQLVAR.GetSubtype: integer;
|
287 |
|
|
begin
|
288 |
|
|
if GetSQLType = SQL_BLOB then
|
289 |
|
|
result := FXSQLVAR^.sqlsubtype
|
290 |
|
|
else
|
291 |
|
|
result := 0;
|
292 |
|
|
end;
|
293 |
|
|
|
294 |
|
|
function TIBXSQLVAR.GetAliasName: string;
|
295 |
|
|
begin
|
296 |
|
|
result := strpas(FXSQLVAR^.aliasname);
|
297 |
|
|
end;
|
298 |
|
|
|
299 |
|
|
function TIBXSQLVAR.GetFieldName: string;
|
300 |
|
|
begin
|
301 |
|
|
result := strpas(FXSQLVAR^.sqlname);
|
302 |
|
|
end;
|
303 |
|
|
|
304 |
|
|
function TIBXSQLVAR.GetOwnerName: string;
|
305 |
|
|
begin
|
306 |
|
|
result := strpas(FXSQLVAR^.ownname);
|
307 |
|
|
end;
|
308 |
|
|
|
309 |
|
|
function TIBXSQLVAR.GetRelationName: string;
|
310 |
|
|
begin
|
311 |
|
|
result := strpas(FXSQLVAR^.relname);
|
312 |
|
|
end;
|
313 |
|
|
|
314 |
|
|
function TIBXSQLVAR.GetScale: integer;
|
315 |
|
|
begin
|
316 |
|
|
if GetSQLType = SQL_BLOB then
|
317 |
|
|
result := 0
|
318 |
|
|
else
|
319 |
|
|
result := FXSQLVAR^.sqlscale;
|
320 |
|
|
end;
|
321 |
|
|
|
322 |
|
|
function TIBXSQLVAR.GetCharSetID: cardinal;
|
323 |
|
|
begin
|
324 |
|
|
result := 0;
|
325 |
|
|
case SQLType of
|
326 |
|
|
SQL_VARYING, SQL_TEXT:
|
327 |
|
|
{see http://firebirdsql.org/rlsnotesh/rlsnotes210.html}
|
328 |
|
|
result := FXSQLVAR^.sqlsubtype and $FF;
|
329 |
|
|
|
330 |
|
|
SQL_BLOB:
|
331 |
|
|
if (SQLSubType = 1) then
|
332 |
|
|
{see http://firebirdsql.org/rlsnotesh/rlsnotes210.html}
|
333 |
|
|
result := FXSQLVAR^.sqlscale;
|
334 |
|
|
|
335 |
|
|
SQL_ARRAY:
|
336 |
|
|
if (GetRelationName <> '') and (GetFieldName <> '') then
|
337 |
|
|
result := GetArrayMetaData.GetCharSetID;
|
338 |
|
|
end;
|
339 |
|
|
end;
|
340 |
|
|
|
341 |
|
|
function TIBXSQLVAR.GetCodePage: TSystemCodePage;
|
342 |
|
|
begin
|
343 |
|
|
result := CP_NONE;
|
344 |
|
|
with FirebirdClientAPI do
|
345 |
|
|
CharSetID2CodePage(GetCharSetID,result);
|
346 |
|
|
end;
|
347 |
|
|
|
348 |
|
|
function TIBXSQLVAR.GetIsNull: Boolean;
|
349 |
|
|
begin
|
350 |
|
|
result := IsNullable and (FNullIndicator = -1);
|
351 |
|
|
end;
|
352 |
|
|
|
353 |
|
|
function TIBXSQLVAR.GetIsNullable: boolean;
|
354 |
|
|
begin
|
355 |
|
|
result := (FXSQLVAR^.sqltype and 1 = 1);
|
356 |
|
|
end;
|
357 |
|
|
|
358 |
|
|
function TIBXSQLVAR.GetSQLData: PChar;
|
359 |
|
|
begin
|
360 |
|
|
Result := FXSQLVAR^.sqldata;
|
361 |
|
|
end;
|
362 |
|
|
|
363 |
|
|
function TIBXSQLVAR.GetDataLength: cardinal;
|
364 |
|
|
begin
|
365 |
|
|
Result := FXSQLVAR^.sqllen;
|
366 |
|
|
end;
|
367 |
|
|
|
368 |
|
|
function TIBXSQLVAR.GetArrayMetaData: IArrayMetaData;
|
369 |
|
|
begin
|
370 |
|
|
if GetSQLType <> SQL_ARRAY then
|
371 |
|
|
IBError(ibxeInvalidDataConversion,[nil]);
|
372 |
|
|
|
373 |
|
|
if FArrayMetaData = nil then
|
374 |
|
|
FArrayMetaData := TFB25ArrayMetaData.Create(FStatement.GetAttachment as TFB25Attachment,
|
375 |
|
|
FStatement.GetTransaction as TFB25Transaction,
|
376 |
|
|
GetRelationName,GetFieldName);
|
377 |
|
|
Result := FArrayMetaData;
|
378 |
|
|
end;
|
379 |
|
|
|
380 |
|
|
function TIBXSQLVAR.GetBlobMetaData: IBlobMetaData;
|
381 |
|
|
begin
|
382 |
|
|
if GetSQLType <> SQL_BLOB then
|
383 |
|
|
IBError(ibxeInvalidDataConversion,[nil]);
|
384 |
|
|
|
385 |
|
|
if FBlobMetaData = nil then
|
386 |
|
|
FBlobMetaData := TFB25BlobMetaData.Create(FStatement.GetAttachment as TFB25Attachment,
|
387 |
|
|
FStatement.GetTransaction as TFB25Transaction,
|
388 |
|
|
GetRelationName,GetFieldName,GetSubType);
|
389 |
|
|
Result := FBlobMetaData;
|
390 |
|
|
end;
|
391 |
|
|
|
392 |
|
|
function TIBXSQLVAR.GetAsArray(Array_ID: TISC_QUAD): IArray;
|
393 |
|
|
begin
|
394 |
|
|
if SQLType <> SQL_ARRAY then
|
395 |
|
|
IBError(ibxeInvalidDataConversion,[nil]);
|
396 |
|
|
|
397 |
|
|
if IsNull then
|
398 |
|
|
Result := nil
|
399 |
|
|
else
|
400 |
|
|
begin
|
401 |
|
|
if FArray = nil then
|
402 |
|
|
FArray := TFB25Array.Create(FStatement.GetAttachment as TFB25Attachment,
|
403 |
|
|
TIBXSQLDA(Parent).GetTransaction,
|
404 |
|
|
GetArrayMetaData,Array_ID);
|
405 |
|
|
Result := FArray;
|
406 |
|
|
end;
|
407 |
|
|
end;
|
408 |
|
|
|
409 |
|
|
function TIBXSQLVAR.GetAsBlob(Blob_ID: TISC_QUAD; BPB: IBPB): IBlob;
|
410 |
|
|
begin
|
411 |
|
|
if FBlob <> nil then
|
412 |
|
|
Result := FBlob
|
413 |
|
|
else
|
414 |
|
|
begin
|
415 |
|
|
if SQLType <> SQL_BLOB then
|
416 |
|
|
IBError(ibxeInvalidDataConversion, [nil]);
|
417 |
|
|
if IsNull then
|
418 |
|
|
Result := nil
|
419 |
|
|
else
|
420 |
|
|
Result := TFB25Blob.Create(FStatement.GetAttachment as TFB25Attachment,
|
421 |
|
|
TIBXSQLDA(Parent).GetTransaction,
|
422 |
|
|
GetBlobMetaData,
|
423 |
|
|
Blob_ID,BPB);
|
424 |
|
|
FBlob := Result;
|
425 |
|
|
end;
|
426 |
|
|
end;
|
427 |
|
|
|
428 |
|
|
function TIBXSQLVAR.CreateBlob: IBlob;
|
429 |
|
|
begin
|
430 |
|
|
Result := TFB25Blob.Create(FStatement.GetAttachment as TFB25Attachment,
|
431 |
|
|
FStatement.GetTransaction as TFB25Transaction,GetSubType,GetCharSetID,nil);
|
432 |
|
|
end;
|
433 |
|
|
|
434 |
|
|
procedure TIBXSQLVAR.Initialize;
|
435 |
|
|
begin
|
436 |
|
|
inherited Initialize;
|
437 |
|
|
FOwnsSQLData := true;
|
438 |
|
|
with FirebirdClientAPI, FXSQLVar^ do
|
439 |
|
|
begin
|
440 |
|
|
case sqltype and (not 1) of
|
441 |
|
|
SQL_TEXT, SQL_TYPE_DATE, SQL_TYPE_TIME, SQL_TIMESTAMP,
|
442 |
|
|
SQL_BLOB, SQL_ARRAY, SQL_QUAD, SQL_SHORT, SQL_BOOLEAN,
|
443 |
|
|
SQL_LONG, SQL_INT64, SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: begin
|
444 |
|
|
if (sqllen = 0) then
|
445 |
|
|
{ Make sure you get a valid pointer anyway
|
446 |
|
|
select '' from foo }
|
447 |
|
|
IBAlloc(sqldata, 0, 1)
|
448 |
|
|
else
|
449 |
|
|
IBAlloc(sqldata, 0, sqllen)
|
450 |
|
|
end;
|
451 |
|
|
SQL_VARYING: begin
|
452 |
|
|
IBAlloc(sqldata, 0, sqllen + 2);
|
453 |
|
|
end;
|
454 |
|
|
else
|
455 |
|
|
IBError(ibxeUnknownSQLDataType, [sqltype and (not 1)])
|
456 |
|
|
end;
|
457 |
|
|
if (sqltype and 1 = 1) then
|
458 |
|
|
begin
|
459 |
|
|
sqlInd := @FNullIndicator;
|
460 |
|
|
FNullIndicator := -1;
|
461 |
|
|
end
|
462 |
|
|
else
|
463 |
|
|
sqlInd := nil;
|
464 |
|
|
end;
|
465 |
|
|
end;
|
466 |
|
|
|
467 |
|
|
procedure TIBXSQLVAR.SetIsNull(Value: Boolean);
|
468 |
|
|
begin
|
469 |
|
|
if Value then
|
470 |
|
|
begin
|
471 |
|
|
if not IsNullable then
|
472 |
|
|
IsNullable := True;
|
473 |
|
|
|
474 |
|
|
FNullIndicator := -1;
|
475 |
|
|
Changed;
|
476 |
|
|
end
|
477 |
|
|
else
|
478 |
|
|
if ((not Value) and IsNullable) then
|
479 |
|
|
begin
|
480 |
|
|
FNullIndicator := 0;
|
481 |
|
|
Changed;
|
482 |
|
|
end;
|
483 |
|
|
end;
|
484 |
|
|
|
485 |
|
|
procedure TIBXSQLVAR.SetIsNullable(Value: Boolean);
|
486 |
|
|
begin
|
487 |
|
|
if (Value <> IsNullable) then
|
488 |
|
|
begin
|
489 |
|
|
if Value then
|
490 |
|
|
begin
|
491 |
|
|
FXSQLVAR^.sqltype := FXSQLVAR^.sqltype or 1;
|
492 |
|
|
FNullIndicator := 0;
|
493 |
|
|
FXSQLVAR^.sqlInd := @FNullIndicator;
|
494 |
|
|
end
|
495 |
|
|
else
|
496 |
|
|
begin
|
497 |
|
|
FXSQLVAR^.sqltype := FXSQLVAR^.sqltype and (not 1);
|
498 |
|
|
FXSQLVAR^.sqlind := nil;
|
499 |
|
|
end;
|
500 |
|
|
end;
|
501 |
|
|
end;
|
502 |
|
|
|
503 |
|
|
procedure TIBXSQLVAR.SetSQLData(AValue: PChar; len: cardinal);
|
504 |
|
|
begin
|
505 |
|
|
if FOwnsSQLData then
|
506 |
|
|
FreeMem(FXSQLVAR^.sqldata);
|
507 |
|
|
FXSQLVAR^.sqldata := AValue;
|
508 |
|
|
FXSQLVAR^.sqllen := len;
|
509 |
|
|
FOwnsSQLData := false;
|
510 |
|
|
end;
|
511 |
|
|
|
512 |
|
|
procedure TIBXSQLVAR.SetScale(aValue: integer);
|
513 |
|
|
begin
|
514 |
|
|
FXSQLVAR^.sqlscale := aValue;
|
515 |
|
|
end;
|
516 |
|
|
|
517 |
|
|
procedure TIBXSQLVAR.SetDataLength(len: cardinal);
|
518 |
|
|
begin
|
519 |
|
|
if not FOwnsSQLData then
|
520 |
|
|
FXSQLVAR^.sqldata := nil;
|
521 |
|
|
FXSQLVAR^.sqllen := len;
|
522 |
|
|
with FirebirdClientAPI do
|
523 |
|
|
IBAlloc(FXSQLVAR^.sqldata, 0, FXSQLVAR^.sqllen);
|
524 |
|
|
FOwnsSQLData := true;
|
525 |
|
|
end;
|
526 |
|
|
|
527 |
|
|
procedure TIBXSQLVAR.SetSQLType(aValue: cardinal);
|
528 |
|
|
begin
|
529 |
|
|
FXSQLVAR^.sqltype := aValue or (FXSQLVAR^.sqltype and 1);
|
530 |
|
|
end;
|
531 |
|
|
|
532 |
|
|
procedure TIBXSQLVAR.SetCharSetID(aValue: cardinal);
|
533 |
|
|
begin
|
534 |
|
|
if aValue <> GetCharSetID then
|
535 |
|
|
case SQLType of
|
536 |
|
|
SQL_VARYING, SQL_TEXT:
|
537 |
|
|
FXSQLVAR^.sqlsubtype := (aValue and $FF) or (FXSQLVAR^.sqlsubtype and not $FF);
|
538 |
|
|
|
539 |
|
|
SQL_BLOB,
|
540 |
|
|
SQL_ARRAY:
|
541 |
|
|
IBError(ibxeInvalidDataConversion,[nil]);
|
542 |
|
|
end;
|
543 |
|
|
end;
|
544 |
|
|
|
545 |
|
|
constructor TIBXSQLVAR.Create(aParent: TIBXSQLDA; aIndex: integer);
|
546 |
|
|
begin
|
547 |
|
|
inherited Create(aParent,aIndex);
|
548 |
|
|
FStatement := aParent.Statement;
|
549 |
|
|
end;
|
550 |
|
|
|
551 |
|
|
procedure TIBXSQLVAR.FreeSQLData;
|
552 |
|
|
begin
|
553 |
|
|
if FOwnsSQLData then
|
554 |
|
|
FreeMem(FXSQLVAR^.sqldata);
|
555 |
|
|
FXSQLVAR^.sqldata := nil;
|
556 |
|
|
FOwnsSQLData := true;
|
557 |
|
|
end;
|
558 |
|
|
|
559 |
|
|
procedure TIBXSQLVAR.RowChange;
|
560 |
|
|
begin
|
561 |
|
|
inherited RowChange;
|
562 |
|
|
FBlob := nil;
|
563 |
|
|
FArray := nil;
|
564 |
|
|
end;
|
565 |
|
|
|
566 |
|
|
|
567 |
|
|
{ TResultSet }
|
568 |
|
|
|
569 |
|
|
constructor TResultSet.Create(aResults: TIBXOUTPUTSQLDA);
|
570 |
|
|
begin
|
571 |
|
|
inherited Create(aResults);
|
572 |
|
|
FResults := aResults;
|
573 |
|
|
FCursorSeqNo := aResults.FStatement.FCursorSeqNo;
|
574 |
|
|
end;
|
575 |
|
|
|
576 |
|
|
destructor TResultSet.Destroy;
|
577 |
|
|
begin
|
578 |
|
|
Close;
|
579 |
|
|
inherited Destroy;
|
580 |
|
|
end;
|
581 |
|
|
|
582 |
|
|
function TResultSet.FetchNext: boolean;
|
583 |
|
|
var i: integer;
|
584 |
|
|
begin
|
585 |
|
|
CheckActive;
|
586 |
|
|
Result := FResults.FStatement.FetchNext;
|
587 |
|
|
if Result then
|
588 |
|
|
for i := 0 to getCount - 1 do
|
589 |
|
|
FResults.Column[i].RowChange;
|
590 |
|
|
end;
|
591 |
|
|
|
592 |
|
|
function TResultSet.GetCursorName: string;
|
593 |
|
|
begin
|
594 |
|
|
Result := FResults.FStatement.FCursor;
|
595 |
|
|
end;
|
596 |
|
|
|
597 |
|
|
function TResultSet.GetTransaction: ITransaction;
|
598 |
|
|
begin
|
599 |
|
|
Result := FResults.GetTransaction;
|
600 |
|
|
end;
|
601 |
|
|
|
602 |
|
|
function TResultSet.IsEof: boolean;
|
603 |
|
|
begin
|
604 |
|
|
Result := FResults.FStatement.FEof;
|
605 |
|
|
end;
|
606 |
|
|
|
607 |
|
|
procedure TResultSet.Close;
|
608 |
|
|
begin
|
609 |
|
|
if FCursorSeqNo = FResults.FStatement.FCursorSeqNo then
|
610 |
|
|
FResults.FStatement.Close;
|
611 |
|
|
end;
|
612 |
|
|
|
613 |
|
|
{ TIBXINPUTSQLDA }
|
614 |
|
|
|
615 |
|
|
procedure TIBXINPUTSQLDA.Bind;
|
616 |
|
|
begin
|
617 |
|
|
if Count = 0 then
|
618 |
|
|
Count := 1;
|
619 |
|
|
with Firebird25ClientAPI do
|
620 |
|
|
begin
|
621 |
|
|
if (FXSQLDA <> nil) then
|
622 |
|
|
if isc_dsql_describe_bind(StatusVector, @(FStatement.Handle), FStatement.SQLDialect,
|
623 |
|
|
FXSQLDA) > 0 then
|
624 |
|
|
IBDataBaseError;
|
625 |
|
|
|
626 |
|
|
if FXSQLDA^.sqld > FXSQLDA^.sqln then
|
627 |
|
|
begin
|
628 |
|
|
Count := FXSQLDA^.sqld;
|
629 |
|
|
if isc_dsql_describe_bind(StatusVector, @(FStatement.Handle), FStatement.SQLDialect,
|
630 |
|
|
FXSQLDA) > 0 then
|
631 |
|
|
IBDataBaseError;
|
632 |
|
|
end
|
633 |
|
|
else
|
634 |
|
|
if FXSQLDA^.sqld = 0 then
|
635 |
|
|
Count := 0;
|
636 |
|
|
end;
|
637 |
|
|
Initialize;
|
638 |
|
|
end;
|
639 |
|
|
|
640 |
|
|
function TIBXINPUTSQLDA.IsInputDataArea: boolean;
|
641 |
|
|
begin
|
642 |
|
|
Result := true;
|
643 |
|
|
end;
|
644 |
|
|
|
645 |
|
|
{ TIBXOUTPUTSQLDA }
|
646 |
|
|
|
647 |
|
|
procedure TIBXOUTPUTSQLDA.Bind;
|
648 |
|
|
begin
|
649 |
|
|
{ Allocate an initial output descriptor (with one column) }
|
650 |
|
|
Count := 1;
|
651 |
|
|
with Firebird25ClientAPI do
|
652 |
|
|
begin
|
653 |
|
|
{ Using isc_dsql_describe, get the right size for the columns... }
|
654 |
|
|
if isc_dsql_describe(StatusVector, @(FStatement.Handle), FStatement.SQLDialect, FXSQLDA) > 0 then
|
655 |
|
|
IBDataBaseError;
|
656 |
|
|
|
657 |
|
|
if FXSQLDA^.sqld > FXSQLDA^.sqln then
|
658 |
|
|
begin
|
659 |
|
|
Count := FXSQLDA^.sqld;
|
660 |
|
|
if isc_dsql_describe(StatusVector, @(FStatement.Handle), FStatement.SQLDialect, FXSQLDA) > 0 then
|
661 |
|
|
IBDataBaseError;
|
662 |
|
|
end
|
663 |
|
|
else
|
664 |
|
|
if FXSQLDA^.sqld = 0 then
|
665 |
|
|
Count := 0;
|
666 |
|
|
end;
|
667 |
|
|
Initialize;
|
668 |
|
|
SetUniqueRelationName;
|
669 |
|
|
end;
|
670 |
|
|
|
671 |
|
|
function TIBXOUTPUTSQLDA.GetTransaction: TFB25Transaction;
|
672 |
|
|
begin
|
673 |
|
|
Result := FTransaction;
|
674 |
|
|
end;
|
675 |
|
|
|
676 |
|
|
procedure TIBXOUTPUTSQLDA.GetData(index: integer; var aIsNull:boolean; var len: short;
|
677 |
|
|
var data: PChar);
|
678 |
|
|
begin
|
679 |
|
|
with TIBXSQLVAR(Column[index]), FXSQLVAR^ do
|
680 |
|
|
begin
|
681 |
|
|
aIsNull := (sqltype and 1 = 1) and (FNullIndicator = -1);
|
682 |
|
|
data := sqldata;
|
683 |
|
|
len := sqllen;
|
684 |
|
|
if not IsNull and ((sqltype and (not 1)) = SQL_VARYING) then
|
685 |
|
|
begin
|
686 |
|
|
with FirebirdClientAPI do
|
687 |
|
|
len := DecodeInteger(data,2);
|
688 |
|
|
Inc(data,2);
|
689 |
|
|
end;
|
690 |
|
|
end;
|
691 |
|
|
end;
|
692 |
|
|
|
693 |
|
|
function TIBXOUTPUTSQLDA.IsInputDataArea: boolean;
|
694 |
|
|
begin
|
695 |
|
|
Result := false;
|
696 |
|
|
end;
|
697 |
|
|
|
698 |
|
|
{ TIBXSQLDA }
|
699 |
|
|
constructor TIBXSQLDA.Create(aStatement: TFB25Statement);
|
700 |
|
|
begin
|
701 |
|
|
inherited Create;
|
702 |
|
|
FStatement := aStatement;
|
703 |
|
|
FSize := 0;
|
704 |
|
|
// writeln('Creating ',ClassName);
|
705 |
|
|
end;
|
706 |
|
|
|
707 |
|
|
destructor TIBXSQLDA.Destroy;
|
708 |
|
|
begin
|
709 |
|
|
FreeXSQLDA;
|
710 |
|
|
// writeln('Destroying ',ClassName);
|
711 |
|
|
inherited Destroy;
|
712 |
|
|
end;
|
713 |
|
|
|
714 |
|
|
function TIBXSQLDA.CheckStatementStatus(Request: TStatementStatus): boolean;
|
715 |
|
|
begin
|
716 |
|
|
Result := false;
|
717 |
|
|
case Request of
|
718 |
|
|
ssPrepared:
|
719 |
|
|
Result := FStatement.IsPrepared;
|
720 |
|
|
|
721 |
|
|
ssExecuteResults:
|
722 |
|
|
Result :=FStatement.FSingleResults;
|
723 |
|
|
|
724 |
|
|
ssCursorOpen:
|
725 |
|
|
Result := FStatement.FOpen;
|
726 |
|
|
|
727 |
|
|
ssBOF:
|
728 |
|
|
Result := FStatement.FBOF;
|
729 |
|
|
|
730 |
|
|
ssEOF:
|
731 |
|
|
Result := FStatement.FEOF;
|
732 |
|
|
end;
|
733 |
|
|
end;
|
734 |
|
|
|
735 |
|
|
function TIBXSQLDA.ColumnsInUseCount: integer;
|
736 |
|
|
begin
|
737 |
|
|
Result := FCount;
|
738 |
|
|
end;
|
739 |
|
|
|
740 |
|
|
function TIBXSQLDA.GetRecordSize: Integer;
|
741 |
|
|
begin
|
742 |
|
|
result := SizeOf(TIBXSQLDA) + XSQLDA_LENGTH(FSize);
|
743 |
|
|
end;
|
744 |
|
|
|
745 |
|
|
function TIBXSQLDA.GetXSQLDA: PXSQLDA;
|
746 |
|
|
begin
|
747 |
|
|
result := FXSQLDA;
|
748 |
|
|
end;
|
749 |
|
|
|
750 |
|
|
function TIBXSQLDA.GetTransactionSeqNo: integer;
|
751 |
|
|
begin
|
752 |
|
|
Result := FTransactionSeqNo;
|
753 |
|
|
end;
|
754 |
|
|
|
755 |
|
|
procedure TIBXSQLDA.Initialize;
|
756 |
|
|
begin
|
757 |
|
|
if FXSQLDA <> nil then
|
758 |
|
|
inherited Initialize;
|
759 |
|
|
end;
|
760 |
|
|
|
761 |
|
|
function TIBXSQLDA.StateChanged(var ChangeSeqNo: integer): boolean;
|
762 |
|
|
begin
|
763 |
|
|
Result := FStatement.ChangeSeqNo <> ChangeSeqNo;
|
764 |
|
|
if Result then
|
765 |
|
|
ChangeSeqNo := FStatement.ChangeSeqNo;
|
766 |
|
|
end;
|
767 |
|
|
|
768 |
|
|
function TIBXSQLDA.GetTransaction: TFB25Transaction;
|
769 |
|
|
begin
|
770 |
|
|
Result := FStatement.GetTransaction as TFB25Transaction;
|
771 |
|
|
end;
|
772 |
|
|
|
773 |
|
|
procedure TIBXSQLDA.SetCount(Value: Integer);
|
774 |
|
|
var
|
775 |
|
|
i, OldSize: Integer;
|
776 |
|
|
p : PXSQLVAR;
|
777 |
|
|
begin
|
778 |
|
|
FCount := Value;
|
779 |
|
|
if FCount = 0 then
|
780 |
|
|
FUniqueRelationName := ''
|
781 |
|
|
else
|
782 |
|
|
begin
|
783 |
|
|
if FSize > 0 then
|
784 |
|
|
OldSize := XSQLDA_LENGTH(FSize)
|
785 |
|
|
else
|
786 |
|
|
OldSize := 0;
|
787 |
|
|
if Count > FSize then
|
788 |
|
|
begin
|
789 |
|
|
Firebird25ClientAPI.IBAlloc(FXSQLDA, OldSize, XSQLDA_LENGTH(Count));
|
790 |
|
|
SetLength(FColumnList, FCount);
|
791 |
|
|
FXSQLDA^.version := SQLDA_VERSION1;
|
792 |
|
|
p := @FXSQLDA^.sqlvar[0];
|
793 |
|
|
for i := 0 to Count - 1 do
|
794 |
|
|
begin
|
795 |
|
|
if i >= FSize then
|
796 |
|
|
FColumnList[i] := TIBXSQLVAR.Create(self,i);
|
797 |
|
|
TIBXSQLVAR(Column[i]).FXSQLVAR := p;
|
798 |
|
|
p := Pointer(PChar(p) + sizeof(FXSQLDA^.sqlvar));
|
799 |
|
|
end;
|
800 |
|
|
FSize := inherited Count;
|
801 |
|
|
end;
|
802 |
|
|
if FSize > 0 then
|
803 |
|
|
begin
|
804 |
|
|
FXSQLDA^.sqln := Value;
|
805 |
|
|
FXSQLDA^.sqld := Value;
|
806 |
|
|
end;
|
807 |
|
|
end;
|
808 |
|
|
end;
|
809 |
|
|
|
810 |
|
|
procedure TIBXSQLDA.FreeXSQLDA;
|
811 |
|
|
var i: integer;
|
812 |
|
|
begin
|
813 |
|
|
if FXSQLDA <> nil then
|
814 |
|
|
begin
|
815 |
|
|
// writeln('SQLDA Cleanup');
|
816 |
|
|
for i := 0 to Count - 1 do
|
817 |
|
|
TIBXSQLVAR(Column[i]).FreeSQLData;
|
818 |
|
|
FreeMem(FXSQLDA);
|
819 |
|
|
FXSQLDA := nil;
|
820 |
|
|
end;
|
821 |
|
|
for i := 0 to FSize - 1 do
|
822 |
|
|
TIBXSQLVAR(Column[i]).Free;
|
823 |
|
|
SetLength(FColumnList,0);
|
824 |
|
|
FSize := 0;
|
825 |
|
|
end;
|
826 |
|
|
|
827 |
|
|
function TIBXSQLDA.GetStatement: IStatement;
|
828 |
|
|
begin
|
829 |
|
|
Result := FStatement;
|
830 |
|
|
end;
|
831 |
|
|
|
832 |
|
|
function TIBXSQLDA.GetPrepareSeqNo: integer;
|
833 |
|
|
begin
|
834 |
|
|
Result := FStatement.FPrepareSeqNo;
|
835 |
|
|
end;
|
836 |
|
|
|
837 |
|
|
{ TFB25Statement }
|
838 |
|
|
|
839 |
|
|
procedure TFB25Statement.CheckHandle;
|
840 |
|
|
begin
|
841 |
|
|
if FHandle = nil then
|
842 |
|
|
IBError(ibxeInvalidStatementHandle,[nil]);
|
843 |
|
|
end;
|
844 |
|
|
|
845 |
|
|
procedure TFB25Statement.GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults
|
846 |
|
|
);
|
847 |
|
|
begin
|
848 |
|
|
with Firebird25ClientAPI, buffer as TSQLInfoResultsBuffer do
|
849 |
|
|
if isc_dsql_sql_info(StatusVector, @(FHandle), 1, @info_request,
|
850 |
|
|
GetBufSize, Buffer) > 0 then
|
851 |
|
|
IBDatabaseError;
|
852 |
|
|
end;
|
853 |
|
|
|
854 |
|
|
procedure TFB25Statement.InternalPrepare;
|
855 |
|
|
var
|
856 |
|
|
RB: ISQLInfoResults;
|
857 |
|
|
TRHandle: TISC_TR_HANDLE;
|
858 |
|
|
begin
|
859 |
|
|
if FPrepared then
|
860 |
|
|
Exit;
|
861 |
|
|
if (FSQL = '') then
|
862 |
|
|
IBError(ibxeEmptyQuery, [nil]);
|
863 |
|
|
try
|
864 |
|
|
CheckTransaction(FTransactionIntf);
|
865 |
|
|
with Firebird25ClientAPI do
|
866 |
|
|
begin
|
867 |
|
|
Call(isc_dsql_alloc_statement2(StatusVector, @(FDBHandle),
|
868 |
|
|
@FHandle), True);
|
869 |
|
|
TRHandle := (FTransactionIntf as TFB25Transaction).Handle;
|
870 |
|
|
if FHasParamNames then
|
871 |
|
|
begin
|
872 |
|
|
if FProcessedSQL = '' then
|
873 |
|
|
FSQLParams.PreprocessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
|
874 |
|
|
Call(isc_dsql_prepare(StatusVector, @(TRHandle), @FHandle, 0,
|
875 |
|
|
PChar(FProcessedSQL), FSQLDialect, nil), True);
|
876 |
|
|
end
|
877 |
|
|
else
|
878 |
|
|
Call(isc_dsql_prepare(StatusVector, @(TRHandle), @FHandle, 0,
|
879 |
|
|
PChar(FSQL), FSQLDialect, nil), True);
|
880 |
|
|
end;
|
881 |
|
|
{ After preparing the statement, query the stmt type and possibly
|
882 |
|
|
create a FSQLRecord "holder" }
|
883 |
|
|
{ Get the type of the statement }
|
884 |
|
|
RB := GetDsqlInfo(isc_info_sql_stmt_type);
|
885 |
|
|
if RB.Count > 0 then
|
886 |
|
|
FSQLStatementType := TIBSQLStatementTypes(RB[0].GetAsInteger)
|
887 |
|
|
else
|
888 |
|
|
FSQLStatementType := SQLUnknown;
|
889 |
|
|
|
890 |
|
|
{ Done getting the type }
|
891 |
|
|
case FSQLStatementType of
|
892 |
|
|
SQLGetSegment,
|
893 |
|
|
SQLPutSegment,
|
894 |
|
|
SQLStartTransaction: begin
|
895 |
|
|
FreeHandle;
|
896 |
|
|
IBError(ibxeNotPermitted, [nil]);
|
897 |
|
|
end;
|
898 |
|
|
SQLCommit,
|
899 |
|
|
SQLRollback,
|
900 |
|
|
SQLDDL, SQLSetGenerator,
|
901 |
|
|
SQLInsert, SQLUpdate, SQLDelete, SQLSelect, SQLSelectForUpdate,
|
902 |
|
|
SQLExecProcedure:
|
903 |
|
|
begin
|
904 |
|
|
{set up input sqlda}
|
905 |
|
|
FSQLParams.Bind;
|
906 |
|
|
|
907 |
|
|
{setup output sqlda}
|
908 |
|
|
if FSQLStatementType in [SQLSelect, SQLSelectForUpdate,
|
909 |
|
|
SQLExecProcedure] then
|
910 |
|
|
FSQLRecord.Bind;
|
911 |
|
|
end;
|
912 |
|
|
end;
|
913 |
|
|
except
|
914 |
|
|
on E: Exception do begin
|
915 |
|
|
if (FHandle <> nil) then
|
916 |
|
|
FreeHandle;
|
917 |
|
|
if E is EIBInterBaseError then
|
918 |
|
|
raise EIBInterBaseError.Create(EIBInterBaseError(E).SQLCode,
|
919 |
|
|
EIBInterBaseError(E).IBErrorCode,
|
920 |
|
|
EIBInterBaseError(E).Message +
|
921 |
|
|
sSQLErrorSeparator + FSQL)
|
922 |
|
|
else
|
923 |
|
|
raise;
|
924 |
|
|
end;
|
925 |
|
|
end;
|
926 |
|
|
FPrepared := true;
|
927 |
|
|
FSingleResults := false;
|
928 |
|
|
if RetainInterfaces then
|
929 |
|
|
begin
|
930 |
|
|
SetRetainInterfaces(false);
|
931 |
|
|
SetRetainInterfaces(true);
|
932 |
|
|
end;
|
933 |
|
|
Inc(FPrepareSeqNo);
|
934 |
|
|
Inc(FChangeSeqNo);
|
935 |
|
|
with FTransactionIntf as TFB25Transaction do
|
936 |
|
|
begin
|
937 |
|
|
FSQLParams.FTransactionSeqNo := TransactionSeqNo;
|
938 |
|
|
FSQLRecord.FTransactionSeqNo := TransactionSeqNo;
|
939 |
|
|
end;
|
940 |
|
|
end;
|
941 |
|
|
|
942 |
|
|
function TFB25Statement.InternalExecute(aTransaction: ITransaction): IResults;
|
943 |
|
|
var TRHandle: TISC_TR_HANDLE;
|
944 |
|
|
begin
|
945 |
|
|
Result := nil;
|
946 |
|
|
FBOF := false;
|
947 |
|
|
FEOF := false;
|
948 |
|
|
FSingleResults := false;
|
949 |
|
|
CheckTransaction(aTransaction);
|
950 |
|
|
if not FPrepared then
|
951 |
|
|
InternalPrepare;
|
952 |
|
|
CheckHandle;
|
953 |
|
|
if aTransaction <> FTransactionIntf then
|
954 |
|
|
AddMonitor(aTransaction as TFB25Transaction);
|
955 |
|
|
if (FSQLParams.FTransactionSeqNo < (FTransactionIntf as TFB25transaction).TransactionSeqNo) then
|
956 |
|
|
IBError(ibxeInterfaceOutofDate,[nil]);
|
957 |
|
|
|
958 |
|
|
try
|
959 |
|
|
TRHandle := (aTransaction as TFB25Transaction).Handle;
|
960 |
|
|
with Firebird25ClientAPI do
|
961 |
|
|
case FSQLStatementType of
|
962 |
|
|
SQLSelect:
|
963 |
|
|
IBError(ibxeIsAExecuteProcedure,[]);
|
964 |
|
|
|
965 |
|
|
SQLExecProcedure:
|
966 |
|
|
begin
|
967 |
|
|
Call(isc_dsql_execute2(StatusVector,
|
968 |
|
|
@(TRHandle),
|
969 |
|
|
@FHandle,
|
970 |
|
|
SQLDialect,
|
971 |
|
|
FSQLParams.AsXSQLDA,
|
972 |
|
|
FSQLRecord.AsXSQLDA), True);
|
973 |
|
|
Result := TResults.Create(FSQLRecord);
|
974 |
|
|
FSingleResults := true;
|
975 |
|
|
end
|
976 |
|
|
else
|
977 |
|
|
Call(isc_dsql_execute(StatusVector,
|
978 |
|
|
@(TRHandle),
|
979 |
|
|
@FHandle,
|
980 |
|
|
SQLDialect,
|
981 |
|
|
FSQLParams.AsXSQLDA), True);
|
982 |
|
|
|
983 |
|
|
end;
|
984 |
|
|
finally
|
985 |
|
|
if aTransaction <> FTransactionIntf then
|
986 |
|
|
RemoveMonitor(aTransaction as TFB25Transaction);
|
987 |
|
|
end;
|
988 |
|
|
FExecTransactionIntf := aTransaction;
|
989 |
|
|
Inc(FChangeSeqNo);
|
990 |
|
|
end;
|
991 |
|
|
|
992 |
|
|
function TFB25Statement.InternalOpenCursor(aTransaction: ITransaction
|
993 |
|
|
): IResultSet;
|
994 |
|
|
var TRHandle: TISC_TR_HANDLE;
|
995 |
|
|
GUID : TGUID;
|
996 |
|
|
begin
|
997 |
|
|
if FSQLStatementType <> SQLSelect then
|
998 |
|
|
IBError(ibxeIsASelectStatement,[]);
|
999 |
|
|
|
1000 |
|
|
CheckTransaction(aTransaction);
|
1001 |
|
|
if not FPrepared then
|
1002 |
|
|
InternalPrepare;
|
1003 |
|
|
CheckHandle;
|
1004 |
|
|
if aTransaction <> FTransactionIntf then
|
1005 |
|
|
AddMonitor(aTransaction as TFB25Transaction);
|
1006 |
|
|
if (FSQLParams.FTransactionSeqNo < (FTransactionIntf as TFB25transaction).TransactionSeqNo) then
|
1007 |
|
|
IBError(ibxeInterfaceOutofDate,[nil]);
|
1008 |
|
|
|
1009 |
|
|
with Firebird25ClientAPI do
|
1010 |
|
|
begin
|
1011 |
|
|
TRHandle := (aTransaction as TFB25Transaction).Handle;
|
1012 |
|
|
Call(isc_dsql_execute2(StatusVector,
|
1013 |
|
|
@(TRHandle),
|
1014 |
|
|
@FHandle,
|
1015 |
|
|
SQLDialect,
|
1016 |
|
|
FSQLParams.AsXSQLDA,
|
1017 |
|
|
nil), True);
|
1018 |
|
|
if FCursor = '' then
|
1019 |
|
|
begin
|
1020 |
|
|
CreateGuid(GUID);
|
1021 |
|
|
FCursor := GUIDToString(GUID);
|
1022 |
|
|
Call(
|
1023 |
|
|
isc_dsql_set_cursor_name(StatusVector, @FHandle, PChar(FCursor), 0),
|
1024 |
|
|
True);
|
1025 |
|
|
end;
|
1026 |
|
|
end;
|
1027 |
|
|
Inc(FCursorSeqNo);
|
1028 |
|
|
FSingleResults := false;
|
1029 |
|
|
FOpen := True;
|
1030 |
|
|
FExecTransactionIntf := aTransaction;
|
1031 |
|
|
FBOF := true;
|
1032 |
|
|
FEOF := false;
|
1033 |
|
|
FSQLRecord.FTransaction := aTransaction as TFB25Transaction;
|
1034 |
|
|
FSQLRecord.FTransactionSeqNo := FSQLRecord.FTransaction.TransactionSeqNo;
|
1035 |
|
|
Result := TResultSet.Create(FSQLRecord);
|
1036 |
|
|
Inc(FChangeSeqNo);
|
1037 |
|
|
end;
|
1038 |
|
|
|
1039 |
|
|
procedure TFB25Statement.FreeHandle;
|
1040 |
|
|
var
|
1041 |
|
|
isc_res: ISC_STATUS;
|
1042 |
|
|
begin
|
1043 |
|
|
Close;
|
1044 |
|
|
ReleaseInterfaces;
|
1045 |
|
|
try
|
1046 |
|
|
if FHandle <> nil then
|
1047 |
|
|
with Firebird25ClientAPI do
|
1048 |
|
|
begin
|
1049 |
|
|
isc_res :=
|
1050 |
|
|
Call(isc_dsql_free_statement(StatusVector, @FHandle, DSQL_drop), False);
|
1051 |
|
|
if (StatusVector^ = 1) and (isc_res > 0) and (isc_res <> isc_bad_stmt_handle) then
|
1052 |
|
|
IBDataBaseError;
|
1053 |
|
|
end;
|
1054 |
|
|
finally
|
1055 |
|
|
FHandle := nil;
|
1056 |
|
|
FCursor := '';
|
1057 |
|
|
FPrepared := false;
|
1058 |
|
|
end;
|
1059 |
|
|
end;
|
1060 |
|
|
|
1061 |
|
|
procedure TFB25Statement.InternalClose(Force: boolean);
|
1062 |
|
|
var
|
1063 |
|
|
isc_res: ISC_STATUS;
|
1064 |
|
|
begin
|
1065 |
|
|
if (FHandle <> nil) and (SQLStatementType = SQLSelect) and FOpen then
|
1066 |
|
|
try
|
1067 |
|
|
with Firebird25ClientAPI do
|
1068 |
|
|
begin
|
1069 |
|
|
isc_res := Call(
|
1070 |
|
|
isc_dsql_free_statement(StatusVector, @FHandle, DSQL_close),
|
1071 |
|
|
False);
|
1072 |
|
|
if not Force and (StatusVector^ = 1) and (isc_res > 0) and
|
1073 |
|
|
not getStatus.CheckStatusVector(
|
1074 |
|
|
[isc_bad_stmt_handle, isc_dsql_cursor_close_err]) then
|
1075 |
|
|
IBDatabaseError;
|
1076 |
|
|
end;
|
1077 |
|
|
finally
|
1078 |
|
|
if (FSQLRecord.FTransaction <> nil) and (FSQLRecord.FTransaction <> FTransactionIntf) then
|
1079 |
|
|
RemoveMonitor(FSQLRecord.FTransaction);
|
1080 |
|
|
FOpen := False;
|
1081 |
|
|
FExecTransactionIntf := nil;
|
1082 |
|
|
FSQLRecord.FTransaction := nil;
|
1083 |
|
|
Inc(FChangeSeqNo);
|
1084 |
|
|
end;
|
1085 |
|
|
end;
|
1086 |
|
|
|
1087 |
|
|
constructor TFB25Statement.Create(Attachment: TFB25Attachment;
|
1088 |
|
|
Transaction: ITransaction; sql: string; aSQLDialect: integer);
|
1089 |
|
|
begin
|
1090 |
|
|
inherited Create(Attachment,Transaction,sql,aSQLDialect);
|
1091 |
|
|
FDBHandle := Attachment.Handle;
|
1092 |
|
|
FSQLParams := TIBXINPUTSQLDA.Create(self);
|
1093 |
|
|
FSQLRecord := TIBXOUTPUTSQLDA.Create(self);
|
1094 |
|
|
InternalPrepare;
|
1095 |
|
|
end;
|
1096 |
|
|
|
1097 |
|
|
constructor TFB25Statement.CreateWithParameterNames(Attachment: TFB25Attachment;
|
1098 |
|
|
Transaction: ITransaction; sql: string; aSQLDialect: integer;
|
1099 |
|
|
GenerateParamNames: boolean);
|
1100 |
|
|
begin
|
1101 |
|
|
inherited CreateWithParameterNames(Attachment,Transaction,sql,aSQLDialect,GenerateParamNames);
|
1102 |
|
|
FDBHandle := Attachment.Handle;
|
1103 |
|
|
FSQLParams := TIBXINPUTSQLDA.Create(self);
|
1104 |
|
|
FSQLRecord := TIBXOUTPUTSQLDA.Create(self);
|
1105 |
|
|
InternalPrepare;
|
1106 |
|
|
end;
|
1107 |
|
|
|
1108 |
|
|
destructor TFB25Statement.Destroy;
|
1109 |
|
|
begin
|
1110 |
|
|
inherited Destroy;
|
1111 |
|
|
if assigned(FSQLParams) then FSQLParams.Free;
|
1112 |
|
|
if assigned(FSQLRecord) then FSQLRecord.Free;
|
1113 |
|
|
end;
|
1114 |
|
|
|
1115 |
|
|
function TFB25Statement.FetchNext: boolean;
|
1116 |
|
|
var
|
1117 |
|
|
fetch_res: ISC_STATUS;
|
1118 |
|
|
begin
|
1119 |
|
|
result := false;
|
1120 |
|
|
if not FOpen then
|
1121 |
|
|
IBError(ibxeSQLClosed, [nil]);
|
1122 |
|
|
if FEOF then
|
1123 |
|
|
IBError(ibxeEOF,[nil]);
|
1124 |
|
|
|
1125 |
|
|
with Firebird25ClientAPI do
|
1126 |
|
|
begin
|
1127 |
|
|
{ Go to the next record... }
|
1128 |
|
|
fetch_res :=
|
1129 |
|
|
Call(isc_dsql_fetch(StatusVector, @FHandle, SQLDialect, FSQLRecord.AsXSQLDA), False);
|
1130 |
|
|
if (fetch_res = 100) or (getStatus.CheckStatusVector([isc_dsql_cursor_err])) then
|
1131 |
|
|
begin
|
1132 |
|
|
FBOF := false;
|
1133 |
|
|
FEOF := true;
|
1134 |
|
|
Exit; {End of File}
|
1135 |
|
|
end
|
1136 |
|
|
else
|
1137 |
|
|
if (fetch_res > 0) then
|
1138 |
|
|
begin
|
1139 |
|
|
try
|
1140 |
|
|
IBDataBaseError;
|
1141 |
|
|
except
|
1142 |
|
|
Close;
|
1143 |
|
|
raise;
|
1144 |
|
|
end;
|
1145 |
|
|
end
|
1146 |
|
|
else
|
1147 |
|
|
begin
|
1148 |
|
|
FBOF := false;
|
1149 |
|
|
result := true;
|
1150 |
|
|
end;
|
1151 |
|
|
end;
|
1152 |
|
|
FSQLRecord.RowChange;
|
1153 |
|
|
if FEOF then
|
1154 |
|
|
Inc(FChangeSeqNo);
|
1155 |
|
|
end;
|
1156 |
|
|
|
1157 |
|
|
function TFB25Statement.GetSQLParams: ISQLParams;
|
1158 |
|
|
begin
|
1159 |
|
|
CheckHandle;
|
1160 |
|
|
if not HasInterface(0) then
|
1161 |
|
|
AddInterface(0,TSQLParams.Create(FSQLParams));
|
1162 |
|
|
Result := TSQLParams(GetInterface(0));
|
1163 |
|
|
end;
|
1164 |
|
|
|
1165 |
|
|
function TFB25Statement.GetMetaData: IMetaData;
|
1166 |
|
|
begin
|
1167 |
|
|
CheckHandle;
|
1168 |
|
|
if not HasInterface(1) then
|
1169 |
|
|
AddInterface(1, TMetaData.Create(FSQLRecord));
|
1170 |
|
|
Result := TMetaData(GetInterface(1));
|
1171 |
|
|
end;
|
1172 |
|
|
|
1173 |
|
|
function TFB25Statement.GetPlan: String;
|
1174 |
|
|
var
|
1175 |
|
|
RB: ISQLInfoResults;
|
1176 |
|
|
begin
|
1177 |
|
|
if (not (FSQLStatementType in [SQLSelect, SQLSelectForUpdate,
|
1178 |
|
|
{TODO: SQLExecProcedure, }
|
1179 |
|
|
SQLUpdate, SQLDelete])) then
|
1180 |
|
|
result := ''
|
1181 |
|
|
else
|
1182 |
|
|
begin
|
1183 |
|
|
RB := TSQLInfoResultsBuffer.Create(4*4096);
|
1184 |
|
|
GetDsqlInfo(isc_info_sql_get_plan,RB);
|
1185 |
|
|
if RB.Count > 0 then
|
1186 |
|
|
Result := RB[0].GetAsString;
|
1187 |
|
|
end;
|
1188 |
|
|
end;
|
1189 |
|
|
|
1190 |
|
|
function TFB25Statement.CreateBlob(column: TColumnMetaData): IBlob;
|
1191 |
|
|
begin
|
1192 |
|
|
if assigned(column) and (column.SQLType <> SQL_Blob) then
|
1193 |
|
|
IBError(ibxeNotABlob,[nil]);
|
1194 |
|
|
Result := TFB25Blob.Create(GetAttachment as TFB25Attachment,FExecTransactionIntf as TFB25Transaction,
|
1195 |
|
|
column.GetBlobMetaData,nil);
|
1196 |
|
|
end;
|
1197 |
|
|
|
1198 |
|
|
function TFB25Statement.CreateArray(column: TColumnMetaData): IArray;
|
1199 |
|
|
begin
|
1200 |
|
|
if assigned(column) and (column.SQLType <> SQL_ARRAY) then
|
1201 |
|
|
IBError(ibxeNotAnArray,[nil]);
|
1202 |
|
|
Result := TFB25Array.Create(GetAttachment as TFB25Attachment,FExecTransactionIntf as TFB25Transaction,
|
1203 |
|
|
column.GetArrayMetaData);
|
1204 |
|
|
end;
|
1205 |
|
|
|
1206 |
|
|
procedure TFB25Statement.SetRetainInterfaces(aValue: boolean);
|
1207 |
|
|
begin
|
1208 |
|
|
inherited SetRetainInterfaces(aValue);
|
1209 |
|
|
if HasInterface(1) then
|
1210 |
|
|
TMetaData(GetInterface(1)).RetainInterfaces := aValue;
|
1211 |
|
|
if HasInterface(0) then
|
1212 |
|
|
TSQLParams(GetInterface(0)).RetainInterfaces := aValue;
|
1213 |
|
|
end;
|
1214 |
|
|
|
1215 |
|
|
function TFB25Statement.IsPrepared: boolean;
|
1216 |
|
|
begin
|
1217 |
|
|
Result := FHandle <> nil;
|
1218 |
|
|
end;
|
1219 |
|
|
|
1220 |
|
|
end.
|
1221 |
|
|
|