1 |
(*
|
2 |
* Firebird Interface (fbintf). The fbintf components provide a set of
|
3 |
* Pascal language bindings for the Firebird API.
|
4 |
*
|
5 |
* The contents of this file are subject to the Initial Developer's
|
6 |
* Public License Version 1.0 (the "License"); you may not use this
|
7 |
* file except in compliance with the License. You may obtain a copy
|
8 |
* of the License here:
|
9 |
*
|
10 |
* http://www.firebirdsql.org/index.php?op=doc&id=idpl
|
11 |
*
|
12 |
* Software distributed under the License is distributed on an "AS
|
13 |
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
14 |
* implied. See the License for the specific language governing rights
|
15 |
* and limitations under the License.
|
16 |
*
|
17 |
* The Initial Developer of the Original Code is Tony Whyman.
|
18 |
*
|
19 |
* The Original Code is (C) 2016 Tony Whyman, MWA Software
|
20 |
* (http://www.mwasoftware.co.uk).
|
21 |
*
|
22 |
* All Rights Reserved.
|
23 |
*
|
24 |
* Contributor(s): ______________________________________.
|
25 |
*
|
26 |
*)
|
27 |
unit FBArray;
|
28 |
{$IFDEF MSWINDOWS}
|
29 |
{$DEFINE WINDOWS}
|
30 |
{$ENDIF}
|
31 |
|
32 |
{$IFDEF FPC}
|
33 |
{$mode delphi}
|
34 |
{$codepage UTF8}
|
35 |
{$interfaces COM}
|
36 |
{$ENDIF}
|
37 |
|
38 |
interface
|
39 |
|
40 |
uses
|
41 |
Classes, SysUtils, IB, IBHeader, FBTransaction,
|
42 |
FBSQLData, FBClientAPI, IBExternals, FBActivityMonitor;
|
43 |
|
44 |
(*
|
45 |
|
46 |
COMMENTS (copied from IBPP)
|
47 |
|
48 |
1)
|
49 |
For an array column of type CHAR(X), the internal type returned or expected is blr_text.
|
50 |
In such case, the byte array received or submitted to get/put_slice is formatted in
|
51 |
elements of X bytes, which correspond to what is reported in array_desc_length.
|
52 |
The elements are not '\0' terminated but are right-padded with spaces ' '.
|
53 |
|
54 |
2)
|
55 |
For an array column of type VARCHAR(X), the internal type is blr_varying.
|
56 |
The underlying format is rather curious and different than what is used in XSQLDA.
|
57 |
The element size is reported in array_desc_length as X.
|
58 |
Yet each element of the byte array is expected to be of size X+2 (just as if we were
|
59 |
to stuff a short in the first 2 bytes to store the length (as is done with XSQLDA).
|
60 |
No. The string of X characters maximum has to be stored in the chunks of X+2 bytes as
|
61 |
a zero-terminated c-string. Note that the buffer is indeed one byte too large.
|
62 |
Internally, the API probably convert in-place in these chunks the zero-terminated string
|
63 |
to a variable-size string with a short in front and the string data non zero-terminated
|
64 |
behind.
|
65 |
|
66 |
*)
|
67 |
|
68 |
type
|
69 |
TFBArray = class;
|
70 |
|
71 |
{ TFBArrayElement }
|
72 |
|
73 |
TFBArrayElement = class(TSQLDataItem)
|
74 |
private
|
75 |
FBufPtr: PByte;
|
76 |
FArray: TFBArray;
|
77 |
protected
|
78 |
function GetSQLDialect: integer; override;
|
79 |
procedure Changing; override;
|
80 |
procedure Changed; override;
|
81 |
function SQLData: PByte; override;
|
82 |
function GetDataLength: cardinal; override;
|
83 |
function GetCodePage: TSystemCodePage; override;
|
84 |
function getCharSetID: cardinal; override;
|
85 |
procedure SetDataLength(len: cardinal); override;
|
86 |
procedure SetSQLType(aValue: cardinal); override;
|
87 |
public
|
88 |
constructor Create(anArray: TFBArray; P: PByte);
|
89 |
function GetSQLType: cardinal; override;
|
90 |
function GetName: AnsiString; override;
|
91 |
function GetScale: integer; override;
|
92 |
function GetSize: integer;
|
93 |
function GetAsString: AnsiString; override;
|
94 |
procedure SetAsLong(Value: Long); override;
|
95 |
procedure SetAsShort(Value: Short); override;
|
96 |
procedure SetAsInt64(Value: Int64); override;
|
97 |
procedure SetAsString(Value: AnsiString); override;
|
98 |
procedure SetAsDouble(Value: Double); override;
|
99 |
procedure SetAsFloat(Value: Float); override;
|
100 |
procedure SetAsCurrency(Value: Currency); override;
|
101 |
end;
|
102 |
|
103 |
{ TFBArrayMetaData }
|
104 |
|
105 |
TFBArrayMetaData = class(TFBInterfacedObject,IArrayMetaData)
|
106 |
private
|
107 |
function GetDType(SQLType: cardinal): UChar;
|
108 |
protected
|
109 |
FArrayDesc: TISC_ARRAY_DESC;
|
110 |
FCharSetID: integer;
|
111 |
procedure LoadMetaData(aAttachment: IAttachment; aTransaction: ITransaction;
|
112 |
relationName, columnName: AnsiString); virtual; abstract;
|
113 |
function NumOfElements: integer;
|
114 |
public
|
115 |
constructor Create(aAttachment: IAttachment; aTransaction: ITransaction;
|
116 |
relationName, columnName: AnsiString); overload;
|
117 |
constructor Create(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
|
118 |
Scale: integer; size: cardinal; charSetID: cardinal;
|
119 |
dimensions: cardinal; bounds: TArrayBounds); overload;
|
120 |
function GetCodePage: TSystemCodePage; virtual; abstract;
|
121 |
|
122 |
public
|
123 |
{IArrayMetaData}
|
124 |
function GetSQLType: cardinal;
|
125 |
function GetSQLTypeName: AnsiString;
|
126 |
function GetScale: integer;
|
127 |
function GetSize: cardinal;
|
128 |
function GetCharSetID: cardinal; virtual; abstract;
|
129 |
function GetTableName: AnsiString;
|
130 |
function GetColumnName: AnsiString;
|
131 |
function GetDimensions: integer;
|
132 |
function GetBounds: TArrayBounds;
|
133 |
end;
|
134 |
|
135 |
|
136 |
{ TFBArray }
|
137 |
|
138 |
TFBArray = class(TActivityReporter,IArray)
|
139 |
private
|
140 |
FMetaData: IArrayMetaData;
|
141 |
FIsNew: boolean;
|
142 |
FLoaded: boolean;
|
143 |
FModified: boolean;
|
144 |
FAttachment: IAttachment;
|
145 |
FTransactionIntf: ITransaction;
|
146 |
FTransactionSeqNo: integer;
|
147 |
FSQLDialect: integer;
|
148 |
FOffsets: array of integer;
|
149 |
FElement: TFBArrayElement;
|
150 |
FElementIntf: IUnknown;
|
151 |
FElementSize: integer;
|
152 |
FEventHandlers: array of TArrayEventHandler;
|
153 |
procedure GetArraySlice;
|
154 |
procedure PutArraySlice(Force: boolean=false);
|
155 |
function GetOffset(index: array of integer): PByte;
|
156 |
function GetDataLength: short;
|
157 |
protected
|
158 |
FBuffer: PByte;
|
159 |
FBufSize: ISC_LONG;
|
160 |
FArrayID: TISC_QUAD;
|
161 |
procedure AllocateBuffer; virtual;
|
162 |
procedure Changing;
|
163 |
procedure Changed;
|
164 |
function GetArrayDesc: PISC_ARRAY_DESC;
|
165 |
procedure InternalGetSlice; virtual; abstract;
|
166 |
procedure InternalPutSlice(Force: boolean); virtual; abstract;
|
167 |
public
|
168 |
constructor Create(aAttachment: IAttachment; aTransaction: TFBTransaction;
|
169 |
aField: IArrayMetaData); overload;
|
170 |
constructor Create(aAttachment: IAttachment; aTransaction: TFBTransaction;
|
171 |
aField: IArrayMetaData; ArrayID: TISC_QUAD); overload;
|
172 |
destructor Destroy; override;
|
173 |
function GetSQLDialect: integer;
|
174 |
procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
|
175 |
|
176 |
public
|
177 |
{IArrayMetaData}
|
178 |
function GetSQLType: cardinal;
|
179 |
function GetSQLTypeName: AnsiString;
|
180 |
function GetScale: integer;
|
181 |
function GetSize: cardinal;
|
182 |
function GetCharSetID: cardinal;
|
183 |
function GetTableName: AnsiString;
|
184 |
function GetColumnName: AnsiString;
|
185 |
function GetDimensions: integer;
|
186 |
function GetBounds: TArrayBounds;
|
187 |
{IArray}
|
188 |
function GetArrayID: TISC_QUAD;
|
189 |
procedure Clear;
|
190 |
function IsEmpty: boolean;
|
191 |
procedure PreLoad;
|
192 |
procedure CancelChanges;
|
193 |
procedure SaveChanges;
|
194 |
function GetAsInteger(index: array of integer): integer;
|
195 |
function GetAsBoolean(index: array of integer): boolean;
|
196 |
function GetAsCurrency(index: array of integer): Currency;
|
197 |
function GetAsInt64(index: array of integer): Int64;
|
198 |
function GetAsDateTime(index: array of integer): TDateTime;
|
199 |
function GetAsDouble(index: array of integer): Double;
|
200 |
function GetAsFloat(index: array of integer): Float;
|
201 |
function GetAsLong(index: array of integer): Long;
|
202 |
function GetAsShort(index: array of integer): Short;
|
203 |
function GetAsString(index: array of integer): AnsiString;
|
204 |
function GetAsVariant(index: array of integer): Variant;
|
205 |
procedure SetAsInteger(index: array of integer; AValue: integer);
|
206 |
procedure SetAsBoolean(index: array of integer; AValue: boolean);
|
207 |
procedure SetAsCurrency(index: array of integer; Value: Currency);
|
208 |
procedure SetAsInt64(index: array of integer; Value: Int64);
|
209 |
procedure SetAsDate(index: array of integer; Value: TDateTime);
|
210 |
procedure SetAsLong(index: array of integer; Value: Long);
|
211 |
procedure SetAsTime(index: array of integer; Value: TDateTime);
|
212 |
procedure SetAsDateTime(index: array of integer; Value: TDateTime);
|
213 |
procedure SetAsDouble(index: array of integer; Value: Double);
|
214 |
procedure SetAsFloat(index: array of integer; Value: Float);
|
215 |
procedure SetAsShort(index: array of integer; Value: Short);
|
216 |
procedure SetAsString(index: array of integer; Value: AnsiString);
|
217 |
procedure SetAsVariant(index: array of integer; Value: Variant);
|
218 |
procedure SetBounds(dim, UpperBound, LowerBound: integer);
|
219 |
function GetAttachment: IAttachment;
|
220 |
function GetTransaction: ITransaction;
|
221 |
procedure AddEventHandler(Handler: TArrayEventHandler);
|
222 |
procedure RemoveEventHandler(Handler: TArrayEventHandler);
|
223 |
end;
|
224 |
|
225 |
implementation
|
226 |
|
227 |
uses FBMessages;
|
228 |
|
229 |
{ TFBArrayElement }
|
230 |
|
231 |
function TFBArrayElement.GetSQLDialect: integer;
|
232 |
begin
|
233 |
Result := FArray.GetSQLDialect;
|
234 |
end;
|
235 |
|
236 |
procedure TFBArrayElement.Changing;
|
237 |
begin
|
238 |
inherited Changing;
|
239 |
FArray.Changing;
|
240 |
end;
|
241 |
|
242 |
procedure TFBArrayElement.Changed;
|
243 |
begin
|
244 |
inherited Changed;
|
245 |
FArray.Changed;
|
246 |
end;
|
247 |
|
248 |
function TFBArrayElement.SQLData: PByte;
|
249 |
begin
|
250 |
Result := FBufPtr;
|
251 |
end;
|
252 |
|
253 |
function TFBArrayElement.GetDataLength: cardinal;
|
254 |
begin
|
255 |
Result := FArray.GetDataLength
|
256 |
end;
|
257 |
|
258 |
function TFBArrayElement.GetCodePage: TSystemCodePage;
|
259 |
begin
|
260 |
Result := (FArray.FMetaData as TFBArrayMetaData).GetCodePage;
|
261 |
end;
|
262 |
|
263 |
function TFBArrayElement.getCharSetID: cardinal;
|
264 |
begin
|
265 |
Result := (FArray.FMetaData as TFBArrayMetaData).GetCharSetID;
|
266 |
end;
|
267 |
|
268 |
procedure TFBArrayElement.SetDataLength(len: cardinal);
|
269 |
begin
|
270 |
if len > GetDataLength then
|
271 |
IBError(ibxeArrayElementOverFlow,[nil]);
|
272 |
end;
|
273 |
|
274 |
constructor TFBArrayElement.Create(anArray: TFBArray; P: PByte);
|
275 |
begin
|
276 |
inherited Create;
|
277 |
FArray := anArray;
|
278 |
FBufPtr := P;
|
279 |
end;
|
280 |
|
281 |
function TFBArrayElement.GetSQLType: cardinal;
|
282 |
begin
|
283 |
Result := FArray.FMetaData.GetSQLType;
|
284 |
end;
|
285 |
|
286 |
function TFBArrayElement.GetName: AnsiString;
|
287 |
begin
|
288 |
Result := FArray.FMetaData.GetColumnName;
|
289 |
end;
|
290 |
|
291 |
function TFBArrayElement.GetScale: integer;
|
292 |
begin
|
293 |
Result := FArray.FMetaData.GetScale;
|
294 |
end;
|
295 |
|
296 |
function TFBArrayElement.GetSize: integer;
|
297 |
begin
|
298 |
Result := GetDataLength;
|
299 |
end;
|
300 |
|
301 |
function TFBArrayElement.GetAsString: AnsiString;
|
302 |
var rs: RawByteString;
|
303 |
begin
|
304 |
case GetSQLType of
|
305 |
SQL_VARYING:
|
306 |
begin
|
307 |
rs := strpas(PAnsiChar(FBufPtr));
|
308 |
SetCodePage(rs,GetCodePage,false);
|
309 |
Result := rs;
|
310 |
end;
|
311 |
SQL_TEXT:
|
312 |
begin
|
313 |
SetString(rs,PAnsiChar(FBufPtr),GetDataLength);
|
314 |
SetCodePage(rs,GetCodePage,false);
|
315 |
Result := rs;
|
316 |
end
|
317 |
else
|
318 |
Result := inherited GetAsString;
|
319 |
end;
|
320 |
end;
|
321 |
|
322 |
procedure TFBArrayElement.SetAsLong(Value: Long);
|
323 |
begin
|
324 |
AsInt64 := Value;
|
325 |
end;
|
326 |
|
327 |
procedure TFBArrayElement.SetAsShort(Value: Short);
|
328 |
begin
|
329 |
AsInt64 := Value;
|
330 |
end;
|
331 |
|
332 |
procedure TFBArrayElement.SetAsInt64(Value: Int64);
|
333 |
begin
|
334 |
CheckActive;
|
335 |
case GetSQLType of
|
336 |
SQL_LONG:
|
337 |
PLong(SQLData)^ := Value;
|
338 |
SQL_SHORT:
|
339 |
PShort(SQLData)^ := Value;
|
340 |
SQL_INT64:
|
341 |
PInt64(SQLData)^ := Value;
|
342 |
SQL_TEXT, SQL_VARYING:
|
343 |
SetAsString(IntToStr(Value));
|
344 |
SQL_D_FLOAT,
|
345 |
SQL_DOUBLE:
|
346 |
PDouble(SQLData)^ := Value;
|
347 |
SQL_FLOAT:
|
348 |
PSingle(SQLData)^ := Value;
|
349 |
else
|
350 |
IBError(ibxeInvalidDataConversion, [nil]);
|
351 |
end;
|
352 |
Changed;
|
353 |
end;
|
354 |
|
355 |
procedure TFBArrayElement.SetAsString(Value: AnsiString);
|
356 |
var len: integer;
|
357 |
ElementSize: integer;
|
358 |
begin
|
359 |
CheckActive;
|
360 |
case GetSQLType of
|
361 |
SQL_BOOLEAN:
|
362 |
if AnsiCompareText(Value,STrue) = 0 then
|
363 |
AsBoolean := true
|
364 |
else
|
365 |
if AnsiCompareText(Value,SFalse) = 0 then
|
366 |
AsBoolean := false
|
367 |
else
|
368 |
IBError(ibxeInvalidDataConversion,[nil]);
|
369 |
|
370 |
SQL_VARYING:
|
371 |
begin
|
372 |
Value := Transliterate(Value,GetCodePage);
|
373 |
len := Length(Value);
|
374 |
ElementSize := GetDataLength;
|
375 |
if len > ElementSize - 2 then
|
376 |
len := ElementSize - 2;
|
377 |
if Len > 0 then
|
378 |
Move(Value[1],FBufPtr^,len);
|
379 |
if Len < ElementSize - 2 then
|
380 |
(FBufPtr+len)^ := 0;
|
381 |
Changed;
|
382 |
end;
|
383 |
|
384 |
SQL_TEXT:
|
385 |
begin
|
386 |
Value := Transliterate(Value,GetCodePage);
|
387 |
ElementSize := GetDataLength;
|
388 |
FillChar(FBufPtr^,ElementSize,' ');
|
389 |
len := Length(Value);
|
390 |
if len > ElementSize - 1 then len := ElementSize - 1;
|
391 |
Move(Value[1],FBufPtr^,len);
|
392 |
Changed;
|
393 |
end;
|
394 |
|
395 |
SQL_SHORT,
|
396 |
SQL_LONG,
|
397 |
SQL_INT64:
|
398 |
if trim(Value) = '' then
|
399 |
SetAsInt64(0)
|
400 |
else
|
401 |
SetAsInt64(StrToInt(Value));
|
402 |
|
403 |
SQL_D_FLOAT,
|
404 |
SQL_DOUBLE,
|
405 |
SQL_FLOAT:
|
406 |
if trim(Value) = '' then
|
407 |
SetAsDouble(0)
|
408 |
else
|
409 |
SetAsDouble(StrToFloat(Value));
|
410 |
|
411 |
SQL_TIMESTAMP:
|
412 |
SetAsDateTime(StrToDateTime(Value));
|
413 |
|
414 |
SQL_TYPE_DATE:
|
415 |
SetAsDate(StrToDateTime(Value));
|
416 |
|
417 |
SQL_TYPE_TIME:
|
418 |
SetAsTime(StrToDateTime(Value));
|
419 |
|
420 |
else
|
421 |
IBError(ibxeInvalidDataConversion,[nil]);
|
422 |
end;
|
423 |
end;
|
424 |
|
425 |
procedure TFBArrayElement.SetAsDouble(Value: Double);
|
426 |
begin
|
427 |
CheckActive;
|
428 |
case GetSQLType of
|
429 |
SQL_D_FLOAT,
|
430 |
SQL_DOUBLE:
|
431 |
PDouble(SQLData)^ := Value;
|
432 |
SQL_FLOAT:
|
433 |
PSingle(SQLData)^ := Value;
|
434 |
SQL_SHORT:
|
435 |
if Scale < 0 then
|
436 |
PShort(SQLData)^ := AdjustScaleFromDouble(Value,Scale)
|
437 |
else
|
438 |
IBError(ibxeInvalidDataConversion, [nil]);
|
439 |
SQL_LONG:
|
440 |
if Scale < 0 then
|
441 |
PLong(SQLData)^ := AdjustScaleFromDouble(Value,Scale)
|
442 |
else
|
443 |
IBError(ibxeInvalidDataConversion, [nil]);
|
444 |
SQL_INT64:
|
445 |
if Scale < 0 then
|
446 |
PInt64(SQLData)^ := AdjustScaleFromDouble(Value,Scale)
|
447 |
else
|
448 |
IBError(ibxeInvalidDataConversion, [nil]);
|
449 |
SQL_TEXT, SQL_VARYING:
|
450 |
AsString := FloatToStr(Value);
|
451 |
else
|
452 |
IBError(ibxeInvalidDataConversion, [nil]);
|
453 |
end;
|
454 |
Changed;
|
455 |
end;
|
456 |
|
457 |
procedure TFBArrayElement.SetAsFloat(Value: Float);
|
458 |
begin
|
459 |
AsDouble := Value;
|
460 |
end;
|
461 |
|
462 |
procedure TFBArrayElement.SetAsCurrency(Value: Currency);
|
463 |
begin
|
464 |
CheckActive;
|
465 |
if (GetSQLDialect < 3) or (SQLType <> SQL_INT64) then
|
466 |
AsDouble := Value
|
467 |
else
|
468 |
begin
|
469 |
if Scale = -4 then
|
470 |
PCurrency(SQLData)^ := Value
|
471 |
else
|
472 |
PInt64(SQLData)^ := AdjustScaleFromCurrency(Value,Scale);
|
473 |
Changed;
|
474 |
end
|
475 |
end;
|
476 |
|
477 |
procedure TFBArrayElement.SetSQLType(aValue: cardinal);
|
478 |
begin
|
479 |
if aValue = GetSQLType then
|
480 |
IBError(ibxeInvalidDataConversion, [nil]);
|
481 |
end;
|
482 |
|
483 |
{TFBArrayMetaData}
|
484 |
|
485 |
constructor TFBArrayMetaData.Create(aAttachment: IAttachment;
|
486 |
aTransaction: ITransaction; relationName, columnName: AnsiString);
|
487 |
begin
|
488 |
inherited Create;
|
489 |
LoadMetaData(aAttachment,aTransaction,relationName, columnName);
|
490 |
end;
|
491 |
|
492 |
constructor TFBArrayMetaData.Create(SQLType: cardinal; tableName: AnsiString;
|
493 |
columnName: AnsiString; Scale: integer; size: cardinal; charSetID: cardinal;
|
494 |
dimensions: cardinal; bounds: TArrayBounds);
|
495 |
var i: integer;
|
496 |
begin
|
497 |
inherited Create;
|
498 |
with FArrayDesc do
|
499 |
begin
|
500 |
array_desc_dtype := GetDType(SQLType);
|
501 |
array_desc_scale := Scale;
|
502 |
array_desc_length := UShort(size);
|
503 |
StrPLCopy(array_desc_field_name,columnName,sizeof(array_desc_field_name));
|
504 |
StrPLCopy(array_desc_relation_name,tableName,sizeof(array_desc_relation_name));
|
505 |
array_desc_dimensions := dimensions;
|
506 |
array_desc_flags := 0;
|
507 |
FCharSetID := charSetID;
|
508 |
for i := 0 to Length(bounds) - 1 do
|
509 |
begin
|
510 |
array_desc_bounds[i].array_bound_lower := bounds[i].LowerBound;
|
511 |
array_desc_bounds[i].array_bound_upper := bounds[i].UpperBound;
|
512 |
end;
|
513 |
end;
|
514 |
end;
|
515 |
|
516 |
function TFBArrayMetaData.GetSQLType: cardinal;
|
517 |
begin
|
518 |
case FArrayDesc.array_desc_dtype of
|
519 |
blr_cstring,
|
520 |
blr_cstring2,
|
521 |
blr_text,blr_text2:
|
522 |
Result := SQL_TEXT;
|
523 |
blr_short:
|
524 |
Result := SQL_SHORT;
|
525 |
blr_long:
|
526 |
Result := SQL_LONG;
|
527 |
blr_quad, blr_blob_id:
|
528 |
Result := SQL_QUAD;
|
529 |
blr_float:
|
530 |
Result := SQL_FLOAT;
|
531 |
blr_double,blr_d_float:
|
532 |
Result := SQL_D_FLOAT;
|
533 |
blr_timestamp:
|
534 |
Result := SQL_TIMESTAMP;
|
535 |
blr_varying,blr_varying2:
|
536 |
Result := SQL_VARYING;
|
537 |
blr_sql_date:
|
538 |
Result := SQL_TYPE_DATE;
|
539 |
blr_sql_time:
|
540 |
Result := SQL_TYPE_TIME;
|
541 |
blr_int64:
|
542 |
Result := SQL_INT64;
|
543 |
end;
|
544 |
end;
|
545 |
|
546 |
function TFBArrayMetaData.GetSQLTypeName: AnsiString;
|
547 |
begin
|
548 |
Result := TSQLDataItem.GetSQLTypeName(GetSQLType);
|
549 |
end;
|
550 |
|
551 |
function TFBArrayMetaData.GetScale: integer;
|
552 |
begin
|
553 |
Result := byte(FArrayDesc.array_desc_scale);
|
554 |
end;
|
555 |
|
556 |
function TFBArrayMetaData.GetSize: cardinal;
|
557 |
begin
|
558 |
Result := FArrayDesc.array_desc_length;
|
559 |
end;
|
560 |
|
561 |
function TFBArrayMetaData.GetTableName: AnsiString;
|
562 |
begin
|
563 |
with FArrayDesc do
|
564 |
SetString(Result,PAnsiChar(@array_desc_relation_name),sizeof(array_desc_relation_name));
|
565 |
Result := trim(Result);
|
566 |
end;
|
567 |
|
568 |
function TFBArrayMetaData.GetColumnName: AnsiString;
|
569 |
begin
|
570 |
with FArrayDesc do
|
571 |
SetString(Result,PAnsiChar(@FArrayDesc.array_desc_field_name),sizeof(array_desc_field_name));
|
572 |
Result := trim(Result);
|
573 |
end;
|
574 |
|
575 |
function TFBArrayMetaData.GetDimensions: integer;
|
576 |
begin
|
577 |
Result := FArrayDesc.array_desc_dimensions;
|
578 |
end;
|
579 |
|
580 |
function TFBArrayMetaData.GetBounds: TArrayBounds;
|
581 |
var i: integer;
|
582 |
begin
|
583 |
SetLength(Result,GetDimensions);
|
584 |
for i := 0 to GetDimensions - 1 do
|
585 |
begin
|
586 |
Result[i].UpperBound := FArrayDesc.array_desc_bounds[i].array_bound_upper;
|
587 |
Result[i].LowerBound := FArrayDesc.array_desc_bounds[i].array_bound_lower;
|
588 |
end;
|
589 |
end;
|
590 |
|
591 |
function TFBArrayMetaData.GetDType(SQLType: cardinal): UChar;
|
592 |
begin
|
593 |
case SQLType of
|
594 |
SQL_TEXT:
|
595 |
Result := blr_text;
|
596 |
SQL_SHORT:
|
597 |
Result := blr_short;
|
598 |
SQL_LONG:
|
599 |
Result := blr_long;
|
600 |
SQL_QUAD:
|
601 |
Result := blr_quad;
|
602 |
SQL_FLOAT:
|
603 |
Result := blr_float;
|
604 |
SQL_D_FLOAT:
|
605 |
Result := blr_double;
|
606 |
SQL_TIMESTAMP:
|
607 |
Result := blr_timestamp;
|
608 |
SQL_VARYING:
|
609 |
Result := blr_varying;
|
610 |
SQL_TYPE_DATE:
|
611 |
Result := blr_sql_date;
|
612 |
SQL_TYPE_TIME:
|
613 |
Result := blr_sql_time;
|
614 |
SQL_INT64:
|
615 |
Result := blr_int64;
|
616 |
end;
|
617 |
end;
|
618 |
|
619 |
function TFBArrayMetaData.NumOfElements: integer;
|
620 |
var i: integer;
|
621 |
Bounds: TArrayBounds;
|
622 |
begin
|
623 |
Result := 1;
|
624 |
Bounds := GetBounds;
|
625 |
for i := 0 to Length(Bounds) - 1 do
|
626 |
Result := Result * (Bounds[i].UpperBound - Bounds[i].LowerBound + 1);
|
627 |
end;
|
628 |
|
629 |
|
630 |
{ TFBArray }
|
631 |
|
632 |
procedure TFBArray.AllocateBuffer;
|
633 |
var i: integer;
|
634 |
l: integer;
|
635 |
Bounds: TArrayBounds;
|
636 |
Dims: integer;
|
637 |
begin
|
638 |
SetLength(FOffsets,0);
|
639 |
FreeMem(FBuffer);
|
640 |
FBuffer := nil;
|
641 |
FLoaded := false;
|
642 |
|
643 |
with FMetaData as TFBArrayMetaData do
|
644 |
begin
|
645 |
l := NumOfElements;
|
646 |
FElementSize := FArrayDesc.array_desc_length;
|
647 |
case GetSQLType of
|
648 |
SQL_VARYING:
|
649 |
FElementSize := FElementSize + 2;
|
650 |
SQL_TEXT:
|
651 |
FElementSize := FElementSize + 1;
|
652 |
end;
|
653 |
FBufSize := FElementSize * l;
|
654 |
|
655 |
with FirebirdClientAPI do
|
656 |
IBAlloc(FBuffer,0,FBufSize);
|
657 |
|
658 |
Dims := GetDimensions;
|
659 |
SetLength(FOffsets,GetDimensions);
|
660 |
Bounds := GetBounds;
|
661 |
if FArrayDesc.array_desc_flags = 0 {row major} then
|
662 |
begin
|
663 |
FOffsets[0] := 1;
|
664 |
for i := 0 to Dims - 2 do
|
665 |
FOffsets[i+1] := FOffsets[i] * (Bounds[i].UpperBound - Bounds[i].LowerBound + 1);
|
666 |
end
|
667 |
else
|
668 |
begin
|
669 |
{column major}
|
670 |
FOffsets[Dims-1] := 1;
|
671 |
for i := Dims - 1 downto 1 do
|
672 |
FOffsets[i-1] := FOffsets[i] * (Bounds[i].UpperBound - Bounds[i].LowerBound + 1);
|
673 |
end;
|
674 |
end;
|
675 |
end;
|
676 |
|
677 |
procedure TFBArray.Changing;
|
678 |
var i: integer;
|
679 |
begin
|
680 |
for i := 0 to Length(FEventHandlers) - 1 do
|
681 |
FEventHandlers[i](self,arChanging);
|
682 |
end;
|
683 |
|
684 |
procedure TFBArray.Changed;
|
685 |
var i: integer;
|
686 |
begin
|
687 |
FModified := true;
|
688 |
for i := 0 to Length(FEventHandlers) - 1 do
|
689 |
FEventHandlers[i](self,arChanged);
|
690 |
end;
|
691 |
|
692 |
procedure TFBArray.GetArraySlice;
|
693 |
begin
|
694 |
if FIsNew or FLoaded then Exit;
|
695 |
InternalGetSlice;
|
696 |
FLoaded := true;
|
697 |
end;
|
698 |
|
699 |
procedure TFBArray.PutArraySlice(Force: boolean);
|
700 |
begin
|
701 |
if not FModified or not FTransactionIntf.InTransaction or
|
702 |
(FTransactionSeqNo < (FTransactionIntf as TFBTransaction).TransactionSeqNo) then Exit;
|
703 |
|
704 |
InternalPutSlice(Force);
|
705 |
FModified := false;
|
706 |
FIsNew := false;
|
707 |
end;
|
708 |
|
709 |
function TFBArray.GetOffset(index: array of integer): PByte;
|
710 |
var i: integer;
|
711 |
Bounds: TArrayBounds;
|
712 |
FlatIndex: integer;
|
713 |
begin
|
714 |
if FMetaData.GetDimensions <> Length(index) then
|
715 |
IBError(ibxeInvalidArrayDimensions,[Length(index)]);
|
716 |
|
717 |
FlatIndex := 0;
|
718 |
Bounds := FMetaData.GetBounds;
|
719 |
for i := 0 to Length(index) - 1 do
|
720 |
begin
|
721 |
if (index[i] < Bounds[i].LowerBound) or (index[i] > Bounds[i].UpperBound) then
|
722 |
IBError(ibxeInvalidSubscript,[index[i],i]);
|
723 |
|
724 |
FlatIndex := FlatIndex + FOffsets[i]*(index[i] - Bounds[i].LowerBound);
|
725 |
end;
|
726 |
Result := FBuffer + FlatIndex*FElementSize;
|
727 |
end;
|
728 |
|
729 |
function TFBArray.GetDataLength: short;
|
730 |
begin
|
731 |
Result := FElementSize;
|
732 |
end;
|
733 |
|
734 |
function TFBArray.GetArrayDesc: PISC_ARRAY_DESC;
|
735 |
begin
|
736 |
Result := @((FMetaData as TFBArrayMetaData).FArrayDesc);
|
737 |
end;
|
738 |
|
739 |
constructor TFBArray.Create(aAttachment: IAttachment; aTransaction: TFBTransaction; aField: IArrayMetaData);
|
740 |
begin
|
741 |
inherited Create(aTransaction);
|
742 |
FMetaData := aField;
|
743 |
FAttachment := aAttachment;
|
744 |
FTransactionIntf := aTransaction;
|
745 |
FTransactionSeqNo := aTransaction.TransactionSeqNo;
|
746 |
FIsNew := true;
|
747 |
FModified := false;
|
748 |
FSQLDialect := aAttachment.GetSQLDialect;
|
749 |
AllocateBuffer;
|
750 |
FElement := TFBArrayElement.Create(self,FBuffer);
|
751 |
FElementIntf := FElement;
|
752 |
Setlength(FEventHandlers,0);
|
753 |
end;
|
754 |
|
755 |
constructor TFBArray.Create(aAttachment: IAttachment; aTransaction: TFBTransaction;
|
756 |
aField: IArrayMetaData; ArrayID: TISC_QUAD);
|
757 |
begin
|
758 |
inherited Create(aTransaction);
|
759 |
FMetaData := aField;
|
760 |
FArrayID := ArrayID;
|
761 |
FAttachment := aAttachment;
|
762 |
FTransactionIntf := aTransaction;
|
763 |
FTransactionSeqNo := aTransaction.TransactionSeqNo;
|
764 |
FIsNew := false;
|
765 |
FModified := false;
|
766 |
FSQLDialect := aAttachment.GetSQLDialect;
|
767 |
AllocateBuffer;
|
768 |
FElement := TFBArrayElement.Create(self,FBuffer);
|
769 |
FElementIntf := FElement;
|
770 |
Setlength(FEventHandlers,0);
|
771 |
end;
|
772 |
|
773 |
destructor TFBArray.Destroy;
|
774 |
begin
|
775 |
FreeMem(FBuffer);
|
776 |
inherited Destroy;
|
777 |
end;
|
778 |
|
779 |
function TFBArray.GetArrayID: TISC_QUAD;
|
780 |
begin
|
781 |
PutArraySlice;
|
782 |
Result := FArrayID;
|
783 |
end;
|
784 |
|
785 |
procedure TFBArray.Clear;
|
786 |
begin
|
787 |
FIsNew := true;
|
788 |
FModified := false;
|
789 |
FArrayID.gds_quad_high := 0;
|
790 |
FArrayID.gds_quad_low := 0;
|
791 |
AllocateBuffer;
|
792 |
end;
|
793 |
|
794 |
function TFBArray.IsEmpty: boolean;
|
795 |
begin
|
796 |
Result := FIsNew and not FModified;
|
797 |
end;
|
798 |
|
799 |
procedure TFBArray.PreLoad;
|
800 |
begin
|
801 |
GetArraySlice;
|
802 |
end;
|
803 |
|
804 |
procedure TFBArray.CancelChanges;
|
805 |
begin
|
806 |
FModified := false;
|
807 |
AllocateBuffer;
|
808 |
end;
|
809 |
|
810 |
procedure TFBArray.SaveChanges;
|
811 |
begin
|
812 |
PutArraySlice;
|
813 |
end;
|
814 |
|
815 |
function TFBArray.GetSQLDialect: integer;
|
816 |
begin
|
817 |
Result := FSQLDialect;
|
818 |
end;
|
819 |
|
820 |
procedure TFBArray.TransactionEnding(aTransaction: ITransaction; Force: boolean
|
821 |
);
|
822 |
begin
|
823 |
if (aTransaction = FTransactionIntf) and FModified and not FIsNew then
|
824 |
PutArraySlice(Force);
|
825 |
end;
|
826 |
|
827 |
function TFBArray.GetSQLType: cardinal;
|
828 |
begin
|
829 |
Result := FMetaData.GetSQLType;
|
830 |
end;
|
831 |
|
832 |
function TFBArray.GetSQLTypeName: AnsiString;
|
833 |
begin
|
834 |
Result := FMetaData.GetSQLTypeName;
|
835 |
end;
|
836 |
|
837 |
function TFBArray.GetScale: integer;
|
838 |
begin
|
839 |
Result := FMetaData.GetScale;
|
840 |
end;
|
841 |
|
842 |
function TFBArray.GetSize: cardinal;
|
843 |
begin
|
844 |
Result := FMetaData.GetSize;
|
845 |
end;
|
846 |
|
847 |
function TFBArray.GetCharSetID: cardinal;
|
848 |
begin
|
849 |
Result := FMetaData.GetCharSetID;
|
850 |
end;
|
851 |
|
852 |
function TFBArray.GetTableName: AnsiString;
|
853 |
begin
|
854 |
Result := FMetaData.GetTableName;
|
855 |
end;
|
856 |
|
857 |
function TFBArray.GetColumnName: AnsiString;
|
858 |
begin
|
859 |
Result := FMetaData.GetColumnName;
|
860 |
end;
|
861 |
|
862 |
function TFBArray.GetDimensions: integer;
|
863 |
begin
|
864 |
Result := FMetaData.GetDimensions;
|
865 |
end;
|
866 |
|
867 |
function TFBArray.GetBounds: TArrayBounds;
|
868 |
begin
|
869 |
Result := FMetaData.GetBounds;
|
870 |
end;
|
871 |
|
872 |
function TFBArray.GetAsInteger(index: array of integer): integer;
|
873 |
begin
|
874 |
GetArraySlice;
|
875 |
FElement.FBufPtr := GetOffset(index);
|
876 |
Result := FElement.GetAsLong;
|
877 |
end;
|
878 |
|
879 |
function TFBArray.GetAsBoolean(index: array of integer): boolean;
|
880 |
begin
|
881 |
GetArraySlice;
|
882 |
FElement.FBufPtr := GetOffset(index);
|
883 |
Result := FElement.GetAsBoolean;
|
884 |
end;
|
885 |
|
886 |
function TFBArray.GetAsCurrency(index: array of integer): Currency;
|
887 |
begin
|
888 |
GetArraySlice;
|
889 |
FElement.FBufPtr := GetOffset(index);
|
890 |
Result := FElement.GetAsCurrency;
|
891 |
end;
|
892 |
|
893 |
function TFBArray.GetAsInt64(index: array of integer): Int64;
|
894 |
begin
|
895 |
GetArraySlice;
|
896 |
FElement.FBufPtr := GetOffset(index);
|
897 |
Result := FElement.GetAsInt64;
|
898 |
end;
|
899 |
|
900 |
function TFBArray.GetAsDateTime(index: array of integer): TDateTime;
|
901 |
begin
|
902 |
GetArraySlice;
|
903 |
FElement.FBufPtr := GetOffset(index);
|
904 |
Result := FElement.GetAsDateTime;
|
905 |
end;
|
906 |
|
907 |
function TFBArray.GetAsDouble(index: array of integer): Double;
|
908 |
begin
|
909 |
GetArraySlice;
|
910 |
FElement.FBufPtr := GetOffset(index);
|
911 |
Result := FElement.GetAsDouble;
|
912 |
end;
|
913 |
|
914 |
function TFBArray.GetAsFloat(index: array of integer): Float;
|
915 |
begin
|
916 |
GetArraySlice;
|
917 |
FElement.FBufPtr := GetOffset(index);
|
918 |
Result := FElement.GetAsFloat;
|
919 |
end;
|
920 |
|
921 |
function TFBArray.GetAsLong(index: array of integer): Long;
|
922 |
begin
|
923 |
GetArraySlice;
|
924 |
FElement.FBufPtr := GetOffset(index);
|
925 |
Result := FElement.GetAsLong;
|
926 |
end;
|
927 |
|
928 |
function TFBArray.GetAsShort(index: array of integer): Short;
|
929 |
begin
|
930 |
GetArraySlice;
|
931 |
FElement.FBufPtr := GetOffset(index);
|
932 |
Result := FElement.GetAsShort;
|
933 |
end;
|
934 |
|
935 |
function TFBArray.GetAsString(index: array of integer): AnsiString;
|
936 |
begin
|
937 |
GetArraySlice;
|
938 |
FElement.FBufPtr := GetOffset(index);
|
939 |
Result := FElement.GetAsString;
|
940 |
end;
|
941 |
|
942 |
function TFBArray.GetAsVariant(index: array of integer): Variant;
|
943 |
begin
|
944 |
GetArraySlice;
|
945 |
FElement.FBufPtr := GetOffset(index);
|
946 |
Result := FElement.GetAsVariant;
|
947 |
end;
|
948 |
|
949 |
procedure TFBArray.SetAsInteger(index: array of integer; AValue: integer);
|
950 |
begin
|
951 |
FElement.FBufPtr := GetOffset(index);
|
952 |
FElement.SetAsLong(AValue);
|
953 |
end;
|
954 |
|
955 |
procedure TFBArray.SetAsBoolean(index: array of integer; AValue: boolean);
|
956 |
begin
|
957 |
FElement.FBufPtr := GetOffset(index);
|
958 |
FElement.SetAsBoolean(AValue);
|
959 |
end;
|
960 |
|
961 |
procedure TFBArray.SetAsCurrency(index: array of integer; Value: Currency);
|
962 |
begin
|
963 |
FElement.FBufPtr := GetOffset(index);
|
964 |
FElement.SetAsCurrency(Value);
|
965 |
end;
|
966 |
|
967 |
procedure TFBArray.SetAsInt64(index: array of integer; Value: Int64);
|
968 |
begin
|
969 |
FElement.FBufPtr := GetOffset(index);
|
970 |
FElement.SetAsInt64(Value);
|
971 |
end;
|
972 |
|
973 |
procedure TFBArray.SetAsDate(index: array of integer; Value: TDateTime);
|
974 |
begin
|
975 |
FElement.FBufPtr := GetOffset(index);
|
976 |
FElement.SetAsDate(Value);
|
977 |
end;
|
978 |
|
979 |
procedure TFBArray.SetAsLong(index: array of integer; Value: Long);
|
980 |
begin
|
981 |
FElement.FBufPtr := GetOffset(index);
|
982 |
FElement.SetAsLong(Value);
|
983 |
end;
|
984 |
|
985 |
procedure TFBArray.SetAsTime(index: array of integer; Value: TDateTime);
|
986 |
begin
|
987 |
FElement.FBufPtr := GetOffset(index);
|
988 |
FElement.SetAsTime(Value);
|
989 |
end;
|
990 |
|
991 |
procedure TFBArray.SetAsDateTime(index: array of integer; Value: TDateTime);
|
992 |
begin
|
993 |
FElement.FBufPtr := GetOffset(index);
|
994 |
FElement.SetAsDateTime(Value);
|
995 |
end;
|
996 |
|
997 |
procedure TFBArray.SetAsDouble(index: array of integer; Value: Double);
|
998 |
begin
|
999 |
FElement.FBufPtr := GetOffset(index);
|
1000 |
FElement.SetAsDouble(Value);
|
1001 |
end;
|
1002 |
|
1003 |
procedure TFBArray.SetAsFloat(index: array of integer; Value: Float);
|
1004 |
begin
|
1005 |
FElement.FBufPtr := GetOffset(index);
|
1006 |
FElement.SetAsFloat(Value);
|
1007 |
end;
|
1008 |
|
1009 |
procedure TFBArray.SetAsShort(index: array of integer; Value: Short);
|
1010 |
begin
|
1011 |
FElement.FBufPtr := GetOffset(index);
|
1012 |
FElement.SetAsShort(Value);
|
1013 |
end;
|
1014 |
|
1015 |
procedure TFBArray.SetAsString(index: array of integer; Value: AnsiString);
|
1016 |
begin
|
1017 |
FElement.FBufPtr := GetOffset(index);
|
1018 |
FElement.SetAsString(Value);
|
1019 |
end;
|
1020 |
|
1021 |
procedure TFBArray.SetAsVariant(index: array of integer; Value: Variant);
|
1022 |
begin
|
1023 |
FElement.FBufPtr := GetOffset(index);
|
1024 |
FElement.SetAsVariant(Value);
|
1025 |
end;
|
1026 |
|
1027 |
procedure TFBArray.SetBounds(dim, UpperBound, LowerBound: integer);
|
1028 |
begin
|
1029 |
with (FMetaData as TFBArrayMetaData) do
|
1030 |
begin
|
1031 |
if (dim < 0) or (dim > GetDimensions) then
|
1032 |
IBError(ibxeInvalidArrayDimensions,[dim]);
|
1033 |
|
1034 |
if (UpperBound > FArrayDesc.array_desc_bounds[dim].array_bound_upper) or
|
1035 |
(LowerBound < FArrayDesc.array_desc_bounds[dim].array_bound_lower) or
|
1036 |
(UpperBound < FArrayDesc.array_desc_bounds[dim].array_bound_lower) or
|
1037 |
(LowerBound > FArrayDesc.array_desc_bounds[dim].array_bound_upper) then
|
1038 |
IBError(ibxArrayBoundsCantIncrease,[nil]);
|
1039 |
|
1040 |
PutArraySlice; {Save any changes}
|
1041 |
|
1042 |
FArrayDesc.array_desc_bounds[dim].array_bound_upper := UpperBound;
|
1043 |
FArrayDesc.array_desc_bounds[dim].array_bound_lower := LowerBound;
|
1044 |
end;
|
1045 |
AllocateBuffer;
|
1046 |
end;
|
1047 |
|
1048 |
function TFBArray.GetAttachment: IAttachment;
|
1049 |
begin
|
1050 |
Result := FAttachment;
|
1051 |
end;
|
1052 |
|
1053 |
function TFBArray.GetTransaction: ITransaction;
|
1054 |
begin
|
1055 |
Result := FTransactionIntf;
|
1056 |
end;
|
1057 |
|
1058 |
procedure TFBArray.AddEventHandler(Handler: TArrayEventHandler);
|
1059 |
begin
|
1060 |
SetLength(FEventHandlers,Length(FEventHandlers)+1);
|
1061 |
FEventHandlers[Length(FEventHandlers)-1] := Handler;
|
1062 |
end;
|
1063 |
|
1064 |
procedure TFBArray.RemoveEventHandler(Handler: TArrayEventHandler);
|
1065 |
var i,j : integer;
|
1066 |
begin
|
1067 |
for i := Length(FEventHandlers) - 1 downto 0 do
|
1068 |
if (TMethod(FEventHandlers[i]).Code = TMethod(Handler).Code) and
|
1069 |
(TMethod(FEventHandlers[i]).Data = TMethod(Handler).Data) then
|
1070 |
begin
|
1071 |
for j := i to Length(FEventHandlers) - 2 do
|
1072 |
FEventHandlers[i] := FEventHandlers[i+1];
|
1073 |
SetLength(FEventHandlers,Length(FEventHandlers) - 1);
|
1074 |
end;
|
1075 |
end;
|
1076 |
|
1077 |
end.
|
1078 |
|