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{************************************************************************} |
2 |
{ } |
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{ Borland Delphi Visual Component Library } |
4 |
{ InterBase Express core components } |
5 |
{ } |
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{ Copyright (c) 1998-2000 Inprise Corporation } |
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{ } |
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{ InterBase Express is based in part on the product } |
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{ Free IB Components, written by Gregory H. Deatz for } |
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. } |
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{ Free IB Components is used under license. } |
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{ } |
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{ The contents of this file are subject to the InterBase } |
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{ Public License Version 1.0 (the "License"); you may not } |
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{ use this file except in compliance with the License. You } |
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html } |
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{ Software distributed under the License is distributed on } |
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either } |
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{ express or implied. See the License for the specific language } |
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{ governing rights and limitations under the License. } |
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{ The Original Code was created by InterBase Software Corporation } |
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{ and its successors. } |
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{ Portions created by Inprise Corporation are Copyright (C) Inprise } |
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{ Corporation. All Rights Reserved. } |
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{ Contributor(s): Jeff Overcash } |
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{ } |
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{ IBX For Lazarus (Firebird Express) } |
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk } |
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{ Portions created by MWA Software are copyright McCallum Whyman } |
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{ Associates Ltd 2011 } |
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{ } |
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{************************************************************************} |
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|
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unit IBTable; |
35 |
|
36 |
{$Mode Delphi} |
37 |
|
38 |
{$codepage UTF8} |
39 |
|
40 |
interface |
41 |
|
42 |
uses SysUtils, Classes, DB, IB, IBCustomDataSet, |
43 |
IBSQL, IBUtils; |
44 |
|
45 |
type |
46 |
|
47 |
{ TIBTable } |
48 |
|
49 |
TIBTableType = (ttSystem, ttView); |
50 |
TIBTableTypes = set of TIBTableType; |
51 |
TIndexName = String; |
52 |
|
53 |
TIBTable = class; |
54 |
|
55 |
TIBTable = class(TIBCustomDataSet) |
56 |
private |
57 |
FSystemTable: Boolean; |
58 |
FMultiTableView: Boolean; |
59 |
FMasterLink: TMasterDataLink; |
60 |
FMasterFieldsList: TStringList; |
61 |
FDetailFieldsList: TStringList; |
62 |
FStoreDefs: Boolean; |
63 |
FIndexDefs: TIndexDefs; |
64 |
FDefaultIndex: Boolean; |
65 |
FReadOnly: Boolean; |
66 |
FFieldsIndex: Boolean; |
67 |
FTableName: String; |
68 |
FIndexName: TIndexName; |
69 |
FRegenerateSQL: Boolean; |
70 |
FNameList: TStrings; |
71 |
FSwitchingIndex: Boolean; |
72 |
FPrimaryIndexFields: string; |
73 |
FTableTypes: TIBTableTypes; |
74 |
WhereAllRefreshSQL: TStrings; |
75 |
WhereDBKeyRefreshSQL: TStrings; |
76 |
WherePrimaryRefreshSQL: TStrings; |
77 |
|
78 |
function GetIndexFieldCount: Integer; |
79 |
function GetIndexField(Index: Integer): TField; |
80 |
procedure MasterChanged(Sender: TObject); |
81 |
procedure MasterDisabled(Sender: TObject); |
82 |
procedure SetDataSource(Value: TDataSource); |
83 |
procedure SetIndexField(Index: Integer; Value: TField); |
84 |
procedure SetIndexFieldNames(const Value: string); |
85 |
procedure GenerateSQL; |
86 |
procedure GenerateUpdateSQL; |
87 |
procedure SwitchToIndex(); |
88 |
procedure InternalTableRefresh(); |
89 |
function GetTableNames: TStrings; |
90 |
procedure GetTableNamesFromServer; |
91 |
procedure SetTableTypes( |
92 |
const Value: TIBTableTypes); |
93 |
function InternalGotoDBKey(DBKey: TIBDBKey): Boolean; |
94 |
function FormatFieldsList(Value: string): string; |
95 |
function GetCurrentDBKey: TIBDBKey; |
96 |
function InternalGetUpdatable: Boolean; |
97 |
function GetExists: Boolean; |
98 |
procedure SetIndexDefs(Value: TIndexDefs); |
99 |
procedure ExtractLinkFields; |
100 |
function FieldDefsStored: Boolean; |
101 |
function IndexDefsStored: Boolean; |
102 |
function GetMasterFields: string; |
103 |
procedure SetMasterFields(const Value: string); |
104 |
function GetIndexFieldNames: string; |
105 |
function GetIndexName: string; |
106 |
procedure SetIndexName(const Value: string); |
107 |
procedure SetParams; |
108 |
procedure SetReadOnly(Value: Boolean); |
109 |
procedure SetTableName(Value: String); |
110 |
procedure SetIndex(const Value: string; FieldsIndex: Boolean); |
111 |
procedure ResetSQLStatements; |
112 |
procedure Reopen; |
113 |
|
114 |
protected |
115 |
|
116 |
procedure DoOnNewRecord; override; |
117 |
procedure GetIndexParams(const IndexName: string; FieldsIndex: Boolean; |
118 |
var IndexedName: string); |
119 |
function GetCanModify: Boolean; override; |
120 |
procedure UpdateIndexDefs; override; |
121 |
procedure DataEvent(Event: TDataEvent; Info: Ptrint); override; |
122 |
procedure DefChanged(Sender: TObject); virtual; |
123 |
function GetDataSource: TDataSource; override; |
124 |
procedure InitFieldDefs; override; |
125 |
procedure InternalClose; override; |
126 |
procedure InternalOpen; override; |
127 |
procedure InternalRefresh; override; |
128 |
procedure SetFiltered(Value: Boolean); override; |
129 |
procedure SetFilterText(const Value: string); override; |
130 |
procedure SetFilterOptions(Value: TFilterOptions); override; |
131 |
procedure InternalRefreshRow; override; |
132 |
|
133 |
public |
134 |
constructor Create(AOwner: TComponent); override; |
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destructor Destroy; override; |
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procedure AddIndex(const Name, Fields: string; Options: TIndexOptions; |
137 |
const DescFields: string = ''); |
138 |
procedure CreateTable; |
139 |
procedure DeleteIndex(const Name: string); |
140 |
procedure DeleteTable; |
141 |
procedure EmptyTable; |
142 |
procedure GetDetailLinkFields(MasterFields, DetailFields: TList); virtual; |
143 |
procedure GetIndexNames(List: TStrings); |
144 |
procedure GotoCurrent(Table: TIBTable); |
145 |
property CurrentDBKey: TIBDBKey read GetCurrentDBKey; |
146 |
property Exists: Boolean read GetExists; |
147 |
property IndexFieldCount: Integer read GetIndexFieldCount; |
148 |
property IndexFields[Index: Integer]: TField read GetIndexField write SetIndexField; |
149 |
property TableNames: TStrings read GetTableNames; |
150 |
|
151 |
published |
152 |
property AutoCommit; |
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property Active; |
154 |
property BufferChunks; |
155 |
property CachedUpdates; |
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property DataSetCloseAction; |
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// property Constraints stored ConstraintsStored; |
158 |
property DefaultIndex: Boolean read FDefaultIndex write FDefaultIndex default True; |
159 |
property FieldDefs stored FieldDefsStored; |
160 |
property Filter; |
161 |
property Filtered; |
162 |
property IndexDefs: TIndexDefs read FIndexDefs write SetIndexDefs stored IndexDefsStored; |
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property IndexFieldNames: string read GetIndexFieldNames write SetIndexFieldNames; |
164 |
property IndexName: string read GetIndexName write SetIndexName; |
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property MasterFields: string read GetMasterFields write SetMasterFields; |
166 |
property MasterSource: TDataSource read GetDataSource write SetDataSource; |
167 |
property ReadOnly: Boolean read FReadOnly write SetReadOnly default False; |
168 |
property StoreDefs: Boolean read FStoreDefs write FStoreDefs default False; |
169 |
property TableName: String read FTableName write SetTableName; |
170 |
property TableTypes: TIBTableTypes read FTableTypes write SetTableTypes default []; |
171 |
property UpdateObject; |
172 |
property UniDirectional; |
173 |
|
174 |
property BeforeDatabaseDisconnect; |
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property AfterDatabaseDisconnect; |
176 |
property DatabaseFree; |
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property BeforeTransactionEnd; |
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property AfterTransactionEnd; |
179 |
property TransactionFree; |
180 |
property OnFilterRecord; |
181 |
end; |
182 |
|
183 |
implementation |
184 |
|
185 |
uses FBMessages; |
186 |
|
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{ TIBTable } |
188 |
|
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constructor TIBTable.Create(AOwner: TComponent); |
190 |
begin |
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inherited Create(AOwner); |
192 |
FNameList := TStringList.Create; |
193 |
FSwitchingIndex := False; |
194 |
FIndexDefs := TIndexDefs.Create(Self); |
195 |
WhereAllRefreshSQL := TStringList.Create; |
196 |
WhereDBKeyRefreshSQL := TStringList.Create; |
197 |
WherePrimaryRefreshSQL := TStringList.Create; |
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FDefaultIndex := True; |
199 |
FRegenerateSQL := True; |
200 |
FMasterFieldsList := TStringList.Create; |
201 |
FDetailFieldsList := TStringList.Create; |
202 |
FMasterLink := TMasterDataLink.Create(Self); |
203 |
FMasterLink.OnMasterChange := MasterChanged; |
204 |
FMasterLink.OnMasterDisable := MasterDisabled; |
205 |
QRefresh.OnSQLChanging := nil; |
206 |
QDelete.OnSQLChanging := nil; |
207 |
QInsert.OnSQLChanging := nil; |
208 |
QModify.OnSQLChanging := nil; |
209 |
end; |
210 |
|
211 |
destructor TIBTable.Destroy; |
212 |
begin |
213 |
FNameList.Free; |
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FIndexDefs.Free; |
215 |
FMasterFieldsList.Free; |
216 |
FDetailFieldsList.Free; |
217 |
FMasterLink.Free; |
218 |
WhereAllRefreshSQL.Free; |
219 |
WhereDBKeyRefreshSQL.Free; |
220 |
WherePrimaryRefreshSQL.Free; |
221 |
inherited Destroy; |
222 |
end; |
223 |
|
224 |
procedure TIBTable.InternalClose; |
225 |
begin |
226 |
DataEvent(dePropertyChange, 0); |
227 |
inherited InternalClose; |
228 |
end; |
229 |
|
230 |
procedure TIBTable.InternalOpen; |
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begin |
232 |
if FTableName = '' then IBError(ibxeNoTableName, [nil]); |
233 |
ActivateConnection; |
234 |
ActivateTransaction; |
235 |
if FRegenerateSQL then |
236 |
begin |
237 |
InternalUnprepare; |
238 |
GenerateSQL; |
239 |
if not FReadOnly then |
240 |
GenerateUpdateSQL; |
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FRegenerateSQL := False; |
242 |
end; |
243 |
{ writeln(SelectSQL.Text); |
244 |
writeln(InsertSQL.Text); |
245 |
writeln(DeleteSQL.Text); |
246 |
writeln(ModifySQL.Text); } |
247 |
SetParams; |
248 |
inherited InternalOpen; |
249 |
end; |
250 |
|
251 |
procedure TIBTable.InternalRefresh; |
252 |
var |
253 |
DBKey: TIBDBKey; |
254 |
begin |
255 |
DBKey := CurrentDBKey; |
256 |
Reopen; |
257 |
if DBKey.DBKey[0] <> 0 then |
258 |
InternalGotoDBKey(DBKey); |
259 |
end; |
260 |
|
261 |
procedure TIBTable.SetFiltered(Value: Boolean); |
262 |
begin |
263 |
if(Filtered <> Value) then |
264 |
begin |
265 |
inherited SetFiltered(value); |
266 |
if Active then |
267 |
InternalTableRefresh; |
268 |
end |
269 |
else |
270 |
inherited SetFiltered(value); |
271 |
end; |
272 |
|
273 |
procedure TIBTable.SetFilterText(const Value: string); |
274 |
begin |
275 |
if Filtered and (Value <> Filter) then |
276 |
begin |
277 |
inherited SetFilterText(value); |
278 |
InternalTableRefresh; |
279 |
end |
280 |
else |
281 |
inherited SetFilterText(value); |
282 |
end; |
283 |
|
284 |
procedure TIBTable.SetFilterOptions(Value: TFilterOptions); |
285 |
begin |
286 |
if Value <> [] then |
287 |
IBError(ibxeNotSupported, [nil]); |
288 |
end; |
289 |
|
290 |
procedure TIBTable.InternalRefreshRow; |
291 |
begin |
292 |
if CurrentDBKey.DBKey[0] <> 0 then |
293 |
QRefresh.SQL.Assign(WhereDBKeyRefreshSQL) |
294 |
else if WherePrimaryRefreshSQL.Text <> '' then |
295 |
QRefresh.SQL.Assign(WherePrimaryRefreshSQL) |
296 |
else |
297 |
QRefresh.SQL.Assign(WhereAllRefreshSQL); |
298 |
inherited InternalRefreshRow; |
299 |
end; |
300 |
|
301 |
procedure TIBTable.DefChanged(Sender: TObject); |
302 |
begin |
303 |
StoreDefs := True; |
304 |
end; |
305 |
|
306 |
procedure TIBTable.InitFieldDefs; |
307 |
var |
308 |
DidActivate: Boolean; |
309 |
Query: TIBSQL; |
310 |
begin |
311 |
if FTableName = '' then IBError(ibxeNoTableName, [nil]); |
312 |
if (InternalPrepared) then |
313 |
InternalInitFieldDefs |
314 |
else |
315 |
begin |
316 |
{Get the field defs from a simple query on the table} |
317 |
ActivateConnection; |
318 |
Query := TIBSQL.Create(self); |
319 |
try |
320 |
Query.Database := DataBase; |
321 |
Query.Transaction := Database.InternalTransaction; |
322 |
DidActivate := false; |
323 |
Query.SQL.Text := 'Select * from ' + QuoteIdentifier(DataBase.SQLDialect, FTableName); |
324 |
with Query.Transaction do |
325 |
begin |
326 |
if not InTransaction then |
327 |
begin |
328 |
StartTransaction; |
329 |
DidActivate := true |
330 |
end; |
331 |
end; |
332 |
Query.Prepare; |
333 |
FieldDefsFromQuery(Query); |
334 |
if DidActivate then |
335 |
Query.Transaction.Rollback; |
336 |
finally |
337 |
Query.Free; |
338 |
end; |
339 |
end; |
340 |
end; |
341 |
|
342 |
{ Index / Ranges / Keys } |
343 |
|
344 |
procedure TIBTable.AddIndex(const Name, Fields: string; Options: TIndexOptions; |
345 |
const DescFields: string); |
346 |
var |
347 |
Query: TIBSQL; |
348 |
FieldList: string; |
349 |
begin |
350 |
FieldDefs.Update; |
351 |
if Active then begin |
352 |
CheckBrowseMode; |
353 |
CursorPosChanged; |
354 |
end; |
355 |
Query := TIBSQL.Create(self); |
356 |
try |
357 |
Query.Database := DataBase; |
358 |
Query.Transaction := Transaction; |
359 |
FieldList := FormatFieldsList(Fields); |
360 |
if (ixPrimary in Options) then |
361 |
begin |
362 |
Query.SQL.Text := 'Alter Table ' + {do not localize} |
363 |
QuoteIdentifier(Database.SQLDialect, FTableName) + |
364 |
' Add CONSTRAINT ' + {do not localize} |
365 |
QuoteIdentifier(Database.SQLDialect, Name) |
366 |
+ ' Primary Key (' + {do not localize} |
367 |
FormatFieldsList(Fields) + |
368 |
')'; |
369 |
end |
370 |
else if ([ixUnique, ixDescending] * Options = [ixUnique, ixDescending]) then |
371 |
Query.SQL.Text := 'Create unique Descending Index ' + {do not localize} |
372 |
QuoteIdentifier(Database.SQLDialect, Name) + |
373 |
' on ' + {do not localize} |
374 |
QuoteIdentifier(Database.SQLDialect, FTableName) + |
375 |
' (' + FieldList + ')' |
376 |
else if (ixUnique in Options) then |
377 |
Query.SQL.Text := 'Create unique Index ' + {do not localize} |
378 |
QuoteIdentifier(Database.SQLDialect, Name) + |
379 |
' on ' + {do not localize} |
380 |
QuoteIdentifier(Database.SQLDialect, FTableName) + |
381 |
' (' + FieldList + ')' |
382 |
else if (ixDescending in Options) then |
383 |
Query.SQL.Text := 'Create Descending Index ' + {do not localize} |
384 |
QuoteIdentifier(Database.SQLDialect, Name) + |
385 |
' on ' + {do not localize} |
386 |
QuoteIdentifier(Database.SQLDialect, FTableName) + |
387 |
' (' + FieldList + ')' |
388 |
else |
389 |
Query.SQL.Text := 'Create Index ' + {do not localize} |
390 |
QuoteIdentifier(Database.SQLDialect, Name) + |
391 |
' on ' + {do not localize} |
392 |
QuoteIdentifier(Database.SQLDialect, FTableName) + |
393 |
' (' + FieldList + ')'; |
394 |
Query.Prepare; |
395 |
Query.ExecQuery; |
396 |
IndexDefs.Updated := False; |
397 |
finally |
398 |
Query.free |
399 |
end; |
400 |
end; |
401 |
|
402 |
procedure TIBTable.DeleteIndex(const Name: string); |
403 |
var |
404 |
Query: TIBSQL; |
405 |
|
406 |
procedure DeleteByIndex; |
407 |
begin |
408 |
Query := TIBSQL.Create(self); |
409 |
try |
410 |
Query.Database := DataBase; |
411 |
Query.Transaction := Transaction; |
412 |
Query.SQL.Text := 'Drop index ' + {do not localize} |
413 |
QuoteIdentifier(Database.SQLDialect, Name); |
414 |
Query.Prepare; |
415 |
Query.ExecQuery; |
416 |
IndexDefs.Updated := False; |
417 |
finally |
418 |
Query.Free; |
419 |
end; |
420 |
end; |
421 |
|
422 |
function DeleteByConstraint: Boolean; |
423 |
begin |
424 |
Result := False; |
425 |
Query := TIBSQL.Create(self); |
426 |
try |
427 |
Query.Database := DataBase; |
428 |
Query.Transaction := Transaction; |
429 |
Query.SQL.Text := 'Select ''foo'' from RDB$RELATION_CONSTRAINTS ' + |
430 |
'where RDB$RELATION_NAME = ' + |
431 |
'''' + |
432 |
FormatIdentifierValue(Database.SQLDialect, |
433 |
QuoteIdentifier(DataBase.SQLDialect, FTableName)) + |
434 |
''' ' + |
435 |
' AND RDB$CONSTRAINT_NAME = ' + |
436 |
'''' + |
437 |
FormatIdentifierValue(Database.SQLDialect, |
438 |
QuoteIdentifier(DataBase.SQLDialect, Name)) + |
439 |
''' ' + |
440 |
'AND RDB$CONSTRAINT_TYPE = ''PRIMARY KEY'''; |
441 |
Query.Prepare; |
442 |
Query.ExecQuery; |
443 |
if not Query.EOF then |
444 |
begin |
445 |
Query.Close; |
446 |
Query.SQL.Text := 'Alter Table ' + {do not localize} |
447 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
448 |
' Drop Constraint ' + |
449 |
QuoteIdentifier(DataBase.SQLDialect, Name); |
450 |
Query.Prepare; |
451 |
Query.ExecQuery; |
452 |
IndexDefs.Updated := False; |
453 |
Result := True; |
454 |
end; |
455 |
finally |
456 |
Query.Free; |
457 |
end; |
458 |
end; |
459 |
|
460 |
procedure DeleteByKey; |
461 |
begin |
462 |
Query := TIBSQL.Create(self); |
463 |
try |
464 |
Query.Database := DataBase; |
465 |
Query.Transaction := Transaction; |
466 |
Query.SQL.Text := 'Select RDB$CONSTRAINT_NAME from RDB$RELATION_CONSTRAINTS ' + |
467 |
'where RDB$RELATION_NAME = ' + |
468 |
'''' + |
469 |
FormatIdentifierValue(Database.SQLDialect, |
470 |
QuoteIdentifier(DataBase.SQLDialect, FTableName)) + |
471 |
''' ' + |
472 |
'AND RDB$INDEX_NAME = ' + |
473 |
'''' + |
474 |
FormatIdentifierValue(Database.SQLDialect, |
475 |
QuoteIdentifier(DataBase.SQLDialect, Name)) + |
476 |
''' ' + |
477 |
'AND RDB$CONSTRAINT_TYPE = ''PRIMARY KEY'''; |
478 |
Query.Prepare; |
479 |
Query.ExecQuery; |
480 |
if not Query.EOF then |
481 |
begin |
482 |
Query.Close; |
483 |
Query.SQL.Text := 'Alter Table ' + {do not localize} |
484 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
485 |
' Drop Constraint ' + |
486 |
QuoteIdentifier(DataBase.SQLDialect, Query.FieldByName('RDB$CONSTRAINT_NAME').AsString); |
487 |
Query.Prepare; |
488 |
Query.ExecQuery; |
489 |
IndexDefs.Updated := False; |
490 |
end; |
491 |
finally |
492 |
Query.Free; |
493 |
end; |
494 |
end; |
495 |
|
496 |
begin |
497 |
if Active then |
498 |
CheckBrowseMode; |
499 |
IndexDefs.Update; |
500 |
if (Pos('RDB$PRIMARY', Name) <> 0 ) then {do not localize} {mbcs ok} |
501 |
DeleteByKey |
502 |
else if not DeleteByConstraint then |
503 |
DeleteByIndex; |
504 |
end; |
505 |
|
506 |
function TIBTable.GetIndexFieldNames: string; |
507 |
begin |
508 |
if FFieldsIndex then Result := FIndexName else Result := ''; |
509 |
end; |
510 |
|
511 |
function TIBTable.GetIndexName: string; |
512 |
begin |
513 |
if FFieldsIndex then Result := '' else Result := FIndexName; |
514 |
end; |
515 |
|
516 |
procedure TIBTable.GetIndexNames(List: TStrings); |
517 |
begin |
518 |
IndexDefs.Update; |
519 |
IndexDefs.GetItemNames(List); |
520 |
end; |
521 |
|
522 |
procedure TIBTable.GetIndexParams(const IndexName: string; |
523 |
FieldsIndex: Boolean; var IndexedName: string); |
524 |
var |
525 |
IndexStr: TIndexName; |
526 |
begin |
527 |
if IndexName <> '' then |
528 |
begin |
529 |
IndexDefs.Update; |
530 |
IndexStr := IndexName; |
531 |
if FieldsIndex then |
532 |
IndexStr := IndexDefs.FindIndexForFields(IndexName).Name; |
533 |
end; |
534 |
IndexedName := IndexStr; |
535 |
end; |
536 |
|
537 |
procedure TIBTable.SetIndexDefs(Value: TIndexDefs); |
538 |
begin |
539 |
IndexDefs.Assign(Value); |
540 |
end; |
541 |
|
542 |
procedure TIBTable.SetIndex(const Value: string; FieldsIndex: Boolean); |
543 |
begin |
544 |
if Active then CheckBrowseMode; |
545 |
if (FIndexName <> Value) or (FFieldsIndex <> FieldsIndex) then |
546 |
begin |
547 |
FIndexName := Value; |
548 |
FFieldsIndex := FieldsIndex; |
549 |
if Active then |
550 |
begin |
551 |
SwitchToIndex; |
552 |
end; |
553 |
end; |
554 |
end; |
555 |
|
556 |
procedure TIBTable.SetIndexFieldNames(const Value: string); |
557 |
begin |
558 |
SetIndex(Value, Value <> ''); |
559 |
end; |
560 |
|
561 |
procedure TIBTable.SetIndexName(const Value: string); |
562 |
begin |
563 |
SetIndex(Value, False); |
564 |
end; |
565 |
|
566 |
procedure TIBTable.UpdateIndexDefs; |
567 |
var |
568 |
Opts: TIndexOptions; |
569 |
Flds: string; |
570 |
Query, SubQuery: TIBSQL; |
571 |
fn: string; |
572 |
aField: TFieldDef; |
573 |
begin |
574 |
if not (csReading in ComponentState) then begin |
575 |
if not Active and not FSwitchingIndex then |
576 |
FieldDefs.Update; |
577 |
IndexDefs.Clear; |
578 |
Database.InternalTransaction.StartTransaction; |
579 |
Query := TIBSQL.Create(self); |
580 |
try |
581 |
FPrimaryIndexFields := ''; |
582 |
Query.GoToFirstRecordOnExecute := False; |
583 |
Query.Database := DataBase; |
584 |
Query.Transaction := Database.InternalTransaction; |
585 |
Query.SQL.Text := |
586 |
'Select I.RDB$INDEX_NAME, I.RDB$UNIQUE_FLAG, I.RDB$INDEX_TYPE, ' + {do not localize} |
587 |
'I.RDB$SEGMENT_COUNT, S.RDB$FIELD_NAME from RDB$INDICES I, ' + {do not localize} |
588 |
'RDB$INDEX_SEGMENTS S where I.RDB$INDEX_NAME = S.RDB$INDEX_NAME '+ {do not localize} |
589 |
'and I.RDB$RELATION_NAME = ' + '''' + {do not localize} |
590 |
FormatIdentifierValue(Database.SQLDialect, |
591 |
QuoteIdentifier(DataBase.SQLDialect, FTableName)) + ''''; |
592 |
Query.Prepare; |
593 |
Query.ExecQuery; |
594 |
while (not Query.EOF) and Query.Next do |
595 |
begin |
596 |
with IndexDefs.AddIndexDef do |
597 |
begin |
598 |
Name := TrimRight(Query.FieldByName('RDB$INDEX_NAME').AsString); {do not localize} |
599 |
Opts := []; |
600 |
if Pos ('RDB$PRIMARY', Name) = 1 then Include(Opts, ixPrimary); {do not localize} {mbcs ok} |
601 |
if Query.FieldByName('RDB$UNIQUE_FLAG').AsInteger = 1 then Include(Opts, ixUnique); {do not localize} |
602 |
if Query.FieldByName('RDB$INDEX_TYPE').AsInteger = 2 then Include(Opts, ixDescending); {do not localize} |
603 |
Options := Opts; |
604 |
if (Query.FieldByName('RDB$SEGMENT_COUNT').AsInteger = 1) then {do not localize} |
605 |
begin |
606 |
fn := Trim(Query.FieldByName('RDB$FIELD_NAME').AsString); {do not localize} |
607 |
aField := GetFieldDefFromAlias(fn); |
608 |
if assigned(aField) then |
609 |
Fields := aField.Name |
610 |
else |
611 |
Fields := fn; |
612 |
end |
613 |
else begin |
614 |
SubQuery := TIBSQL.Create(self); |
615 |
try |
616 |
SubQuery.GoToFirstRecordOnExecute := False; |
617 |
SubQuery.Database := DataBase; |
618 |
SubQuery.Transaction := Database.InternalTransaction; |
619 |
SubQuery.SQL.Text := |
620 |
'Select RDB$FIELD_NAME from RDB$INDEX_SEGMENTS where RDB$INDEX_NAME = ' + {do not localize} |
621 |
'''' + |
622 |
FormatIdentifierValue(Database.SQLDialect, |
623 |
QuoteIdentifier(DataBase.SQLDialect, Name)) + |
624 |
'''' + 'ORDER BY RDB$FIELD_POSITION'; {do not localize} |
625 |
SubQuery.Prepare; |
626 |
SubQuery.ExecQuery; |
627 |
Flds := ''; |
628 |
while (not SubQuery.EOF) and SubQuery.Next do |
629 |
begin |
630 |
fn := TrimRight(SubQuery.FieldByName('RDB$FIELD_NAME').AsString); {do not localize} |
631 |
aField := GetFieldDefFromAlias(fn); |
632 |
if assigned(aField) then |
633 |
fn := aField.Name; |
634 |
if (Flds = '') then |
635 |
Flds := fn |
636 |
else begin |
637 |
Query.Next; |
638 |
Flds := Flds + ';' + fn; |
639 |
end; |
640 |
end; |
641 |
Fields := Flds; |
642 |
finally |
643 |
SubQuery.Free; |
644 |
end; |
645 |
end; |
646 |
if (ixDescending in Opts) then |
647 |
DescFields := Fields; |
648 |
if ixPrimary in Opts then |
649 |
FPrimaryIndexFields := Fields; |
650 |
end; |
651 |
end; |
652 |
finally |
653 |
Query.Free; |
654 |
Database.InternalTransaction.Commit; |
655 |
end; |
656 |
end; |
657 |
end; |
658 |
|
659 |
function TIBTable.GetExists: Boolean; |
660 |
var |
661 |
Query: TIBSQL; |
662 |
begin |
663 |
Result := Active; |
664 |
if Result or (TableName = '') then Exit; |
665 |
Database.InternalTransaction.StartTransaction; |
666 |
Query := TIBSQL.Create(self); |
667 |
try |
668 |
Query.Database := DataBase; |
669 |
Query.Transaction := Database.InternalTransaction; |
670 |
Query.SQL.Text := |
671 |
'Select USER from RDB$RELATIONS where RDB$RELATION_NAME = ' + {do not localize} |
672 |
'''' + |
673 |
FormatIdentifierValue(Database.SQLDialect, |
674 |
QuoteIdentifier(DataBase.SQLDialect, FTableName)) + ''''; |
675 |
Query.Prepare; |
676 |
Query.ExecQuery; |
677 |
Result := not Query.EOF; |
678 |
finally |
679 |
Query.Free; |
680 |
Database.InternalTransaction.Commit; |
681 |
end; |
682 |
end; |
683 |
|
684 |
procedure TIBTable.GotoCurrent(Table: TIBTable); |
685 |
begin |
686 |
CheckBrowseMode; |
687 |
Table.CheckBrowseMode; |
688 |
if (Database <> Table.Database) or |
689 |
(CompareText(TableName, Table.TableName) <> 0) then |
690 |
IBError(ibxeTableNameMismatch, [nil]); |
691 |
Table.UpdateCursorPos; |
692 |
InternalGotoDBKey(Table.CurrentDBKey); |
693 |
DoBeforeScroll; |
694 |
Resync([rmExact, rmCenter]); |
695 |
DoAfterScroll; |
696 |
end; |
697 |
|
698 |
|
699 |
procedure TIBTable.CreateTable; |
700 |
var |
701 |
FieldList: string; |
702 |
|
703 |
procedure InitFieldsList; |
704 |
var |
705 |
I: Integer; |
706 |
begin |
707 |
InitFieldDefsFromFields; |
708 |
for I := 0 to FieldDefs.Count - 1 do begin |
709 |
if ( I > 0) then |
710 |
FieldList := FieldList + ', '; |
711 |
with FieldDefs[I] do |
712 |
begin |
713 |
case DataType of |
714 |
ftString: |
715 |
FieldList := FieldList + |
716 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
717 |
' VARCHAR(' + IntToStr(Size) + ')'; {do not localize} |
718 |
ftFixedChar: |
719 |
FieldList := FieldList + |
720 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
721 |
' CHAR(' + IntToStr(Size) + ')'; {do not localize} |
722 |
ftBoolean: |
723 |
FieldList := FieldList + |
724 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
725 |
' BOOLEAN'; {do not localize} |
726 |
ftSmallint, ftWord: |
727 |
FieldList := FieldList + |
728 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
729 |
' SMALLINT'; {do not localize} |
730 |
ftInteger: |
731 |
FieldList := FieldList + |
732 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
733 |
' INTEGER'; {do not localize} |
734 |
ftFloat, ftCurrency: |
735 |
FieldList := FieldList + |
736 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
737 |
' DOUBLE PRECISION'; {do not localize} |
738 |
ftBCD: begin |
739 |
if (Database.SQLDialect = 1) then begin |
740 |
if (Precision > 9) then |
741 |
IBError(ibxeFieldUnsupportedType,[nil]); |
742 |
if (Precision <= 4) then |
743 |
Precision := 9; |
744 |
end; |
745 |
if (Precision <= 4 ) then |
746 |
FieldList := FieldList + |
747 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
748 |
' Numeric(18, 4)' {do not localize} |
749 |
else |
750 |
FieldList := FieldList + |
751 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
752 |
' Numeric(' + IntToStr(Precision) + ', 4)'; {do not localize} |
753 |
end; |
754 |
ftDate: |
755 |
FieldList := FieldList + |
756 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
757 |
' DATE'; {do not localize} |
758 |
ftTime: |
759 |
FieldList := FieldList + |
760 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
761 |
' TIME'; {do not localize} |
762 |
ftDateTime: |
763 |
if (Database.SQLDialect = 1) then |
764 |
FieldList := FieldList + |
765 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
766 |
' DATE' {do not localize} |
767 |
else |
768 |
FieldList := FieldList + |
769 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
770 |
' TIMESTAMP'; {do not localize} |
771 |
ftLargeInt: |
772 |
if (Database.SQLDialect = 1) then |
773 |
IBError(ibxeFieldUnsupportedType,[nil]) |
774 |
else |
775 |
FieldList := FieldList + |
776 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
777 |
' Numeric(18, 0)'; {do not localize} |
778 |
ftBlob, ftMemo: |
779 |
FieldList := FieldList + |
780 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
781 |
' BLOB SUB_TYPE 1'; {do not localize} |
782 |
ftBytes, ftVarBytes, ftGraphic..ftTypedBinary: |
783 |
FieldList := FieldList + |
784 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
785 |
' BLOB SUB_TYPE 0'; {do not localize} |
786 |
ftUnknown, ftADT, ftArray, ftReference, ftDataSet, |
787 |
ftCursor, ftWideString, ftAutoInc: |
788 |
IBError(ibxeFieldUnsupportedType,[nil]); |
789 |
else |
790 |
IBError(ibxeFieldUnsupportedType,[nil]); |
791 |
end; |
792 |
if faRequired in Attributes then |
793 |
FieldList := FieldList + ' NOT NULL'; {do not localize} |
794 |
end; |
795 |
end; |
796 |
end; |
797 |
|
798 |
procedure InternalCreateTable; |
799 |
var |
800 |
I: Integer; |
801 |
Query: TIBSQL; |
802 |
begin |
803 |
if (FieldList = '') then |
804 |
IBError(ibxeFieldUnsupportedType,[nil]); |
805 |
Query := TIBSQL.Create(self); |
806 |
try |
807 |
Query.Database := Database; |
808 |
Query.transaction := Transaction; |
809 |
Query.SQL.Text := 'Create Table ' + |
810 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
811 |
' (' + FieldList; {do not localize} |
812 |
for I := 0 to IndexDefs.Count - 1 do |
813 |
with IndexDefs[I] do |
814 |
if ixPrimary in Options then |
815 |
begin |
816 |
Query.SQL.Text := Query.SQL.Text + ', CONSTRAINT ' + |
817 |
QuoteIdentifier(DataBase.SQLDialect, Name) + |
818 |
' Primary Key (' + |
819 |
FormatFieldsList(Fields) + |
820 |
')'; |
821 |
end; |
822 |
Query.SQL.Text := Query.SQL.Text + ')'; |
823 |
Query.Prepare; |
824 |
Query.ExecQuery; |
825 |
finally |
826 |
Query.Free; |
827 |
end; |
828 |
end; |
829 |
|
830 |
procedure InternalCreateIndex; |
831 |
var |
832 |
I: Integer; |
833 |
begin |
834 |
for I := 0 to IndexDefs.Count - 1 do |
835 |
with IndexDefs[I] do |
836 |
if not (ixPrimary in Options) then |
837 |
AddIndex(Name, Fields, Options); |
838 |
end; |
839 |
|
840 |
begin |
841 |
CheckInactive; |
842 |
InitFieldsList; |
843 |
InternalCreateTable; |
844 |
InternalCreateIndex; |
845 |
end; |
846 |
|
847 |
procedure TIBTable.DeleteTable; |
848 |
var |
849 |
Query: TIBSQL; |
850 |
begin |
851 |
CheckInactive; |
852 |
Query := TIBSQL.Create(self); |
853 |
try |
854 |
Query.Database := DataBase; |
855 |
Query.Transaction := Transaction; |
856 |
Query.SQL.Text := 'drop table ' + {do not localize} |
857 |
QuoteIdentifier(DataBase.SQLDialect, FTableName); |
858 |
Query.Prepare; |
859 |
Query.ExecQuery; |
860 |
finally |
861 |
Query.Free; |
862 |
end; |
863 |
end; |
864 |
|
865 |
procedure TIBTable.EmptyTable; |
866 |
var |
867 |
Query: TIBSQL; |
868 |
begin |
869 |
if Active then |
870 |
CheckBrowseMode; |
871 |
Query := TIBSQL.Create(self); |
872 |
try |
873 |
Query.Database := DataBase; |
874 |
Query.Transaction := Transaction; |
875 |
Query.SQL.Text := 'delete from ' + {do not localize} |
876 |
QuoteIdentifier(DataBase.SQLDialect, FTableName); |
877 |
Query.Prepare; |
878 |
Query.ExecQuery; |
879 |
if Active then |
880 |
begin |
881 |
ClearBuffers; |
882 |
DataEvent(deDataSetChange, 0); |
883 |
end; |
884 |
finally |
885 |
Query.Free; |
886 |
end; |
887 |
end; |
888 |
|
889 |
procedure TIBTable.DataEvent(Event: TDataEvent; Info: Ptrint); |
890 |
begin |
891 |
if Event = dePropertyChange then begin |
892 |
IndexDefs.Updated := False; |
893 |
FRegenerateSQL := True; |
894 |
end; |
895 |
inherited DataEvent(Event, Info); |
896 |
end; |
897 |
|
898 |
{ Informational & Property } |
899 |
|
900 |
function TIBTable.GetCanModify: Boolean; |
901 |
begin |
902 |
Result := True; |
903 |
if (FTableName = '') or FReadOnly |
904 |
or FSystemTable or FMultiTableView then |
905 |
Result := False; |
906 |
end; |
907 |
|
908 |
function TIBTable.InternalGetUpdatable: Boolean; |
909 |
var |
910 |
Query : TIBSQL; |
911 |
begin |
912 |
Database.InternalTransaction.StartTransaction; |
913 |
Query := TIBSQL.Create(self); |
914 |
try |
915 |
Query.Database := DataBase; |
916 |
Query.Transaction := Database.InternalTransaction; |
917 |
Query.SQL.Text := 'Select RDB$SYSTEM_FLAG, RDB$DBKEY_LENGTH ' + {do not localize} |
918 |
'from RDB$RELATIONS where RDB$RELATION_NAME = ' + {do not localize} |
919 |
'''' + |
920 |
FormatIdentifierValue(Database.SQLDialect, |
921 |
QuoteIdentifier(DataBase.SQLDialect, FTableName)) + ''''; |
922 |
Query.Prepare; |
923 |
Query.ExecQuery; |
924 |
if (Query.Fields[0].AsInteger <> 0) or |
925 |
(Query.Fields[1].AsInteger <> 8) then |
926 |
Result := False |
927 |
else |
928 |
Result := True; |
929 |
finally |
930 |
Query.Free; |
931 |
Database.InternalTransaction.Commit; |
932 |
end; |
933 |
end; |
934 |
|
935 |
function TIBTable.FieldDefsStored: Boolean; |
936 |
begin |
937 |
Result := StoreDefs and (FieldDefs.Count > 0); |
938 |
end; |
939 |
|
940 |
function TIBTable.IndexDefsStored: Boolean; |
941 |
begin |
942 |
Result := StoreDefs and (IndexDefs.Count > 0); |
943 |
end; |
944 |
|
945 |
procedure TIBTable.SetParams; |
946 |
var |
947 |
i: Integer; |
948 |
begin |
949 |
if (MasterSource = nil) or (MasterSource.DataSet = nil) or |
950 |
(not MasterSource.DataSet.Active) or (FMasterFieldsList.Count = 0) then |
951 |
exit; |
952 |
for i := 0 to FMasterFieldsList.Count - 1 do |
953 |
QSelect.Params.ByName(FMasterFieldsList.Strings[i]).Value := |
954 |
MasterSource.DataSet.FieldByName(FMasterFieldsList.Strings[i]).Value; |
955 |
end; |
956 |
|
957 |
procedure TIBTable.MasterChanged(Sender: TObject); |
958 |
begin |
959 |
CheckBrowseMode; |
960 |
SetParams; |
961 |
ReQuery; |
962 |
end; |
963 |
|
964 |
procedure TIBTable.MasterDisabled(Sender: TObject); |
965 |
begin |
966 |
DataEvent(dePropertyChange, 0); |
967 |
ReQuery; |
968 |
end; |
969 |
|
970 |
function TIBTable.GetDataSource: TDataSource; |
971 |
begin |
972 |
Result := FMasterLink.DataSource; |
973 |
end; |
974 |
|
975 |
procedure TIBTable.SetDataSource(Value: TDataSource); |
976 |
begin |
977 |
if IsLinkedTo(Value) then IBError(ibxeCircularDataLink, [Self]); |
978 |
if FMasterLink.DataSource <> Value then |
979 |
DataEvent(dePropertyChange, 0); |
980 |
FMasterLink.DataSource := Value; |
981 |
end; |
982 |
|
983 |
function TIBTable.GetMasterFields: string; |
984 |
begin |
985 |
Result := FMasterLink.FieldNames; |
986 |
end; |
987 |
|
988 |
procedure TIBTable.SetMasterFields(const Value: string); |
989 |
begin |
990 |
if FMasterLink.FieldNames <> Value then |
991 |
DataEvent(dePropertyChange, 0); |
992 |
FMasterLink.FieldNames := Value; |
993 |
end; |
994 |
|
995 |
procedure TIBTable.DoOnNewRecord; |
996 |
var |
997 |
I: Integer; |
998 |
begin |
999 |
if FMasterLink.Active and (FMasterLink.Fields.Count > 0) then |
1000 |
for I := 0 to FMasterLink.Fields.Count - 1 do |
1001 |
IndexFields[I] := TField(FMasterLink.Fields[I]); |
1002 |
inherited DoOnNewRecord; |
1003 |
end; |
1004 |
|
1005 |
function TIBTable.FormatFieldsList(Value: String): String; |
1006 |
var |
1007 |
FieldName: string; |
1008 |
i: Integer; |
1009 |
begin |
1010 |
if Database.SQLDialect = 1 then begin |
1011 |
Value := QuoteIdentifier(Database.SQLDialect, Value); |
1012 |
Result := StringReplace (Value, ';', ', ', [rfReplaceAll]); |
1013 |
end |
1014 |
else begin |
1015 |
i := 1; |
1016 |
Result := ''; |
1017 |
while i <= Length(Value) do |
1018 |
begin |
1019 |
FieldName := ExtractFieldName(Value, i); |
1020 |
if Result = '' then |
1021 |
Result := QuoteIdentifier(Database.SQLDialect, FieldName) |
1022 |
else |
1023 |
Result := Result + ', ' + QuoteIdentifier(Database.SQLDialect, FieldName); |
1024 |
end; |
1025 |
end; |
1026 |
end; |
1027 |
|
1028 |
procedure TIBTable.ExtractLinkFields; |
1029 |
var |
1030 |
i: Integer; |
1031 |
DetailFieldNames: String; |
1032 |
begin |
1033 |
FMasterFieldsList.Clear; |
1034 |
FDetailFieldsList.Clear; |
1035 |
i := 1; |
1036 |
while i <= Length(MasterFields) do |
1037 |
FMasterFieldsList.Add(ExtractFieldName(MasterFields, i)); |
1038 |
i := 1; |
1039 |
if IndexFieldNames = '' then |
1040 |
DetailFieldNames := FPrimaryIndexFields |
1041 |
else |
1042 |
DetailFieldNames := IndexFieldNames; |
1043 |
while i <= Length(DetailFieldNames) do |
1044 |
FDetailFieldsList.Add(ExtractFieldName(DetailFieldNames, i)); |
1045 |
end; |
1046 |
|
1047 |
procedure TIBTable.GetDetailLinkFields(MasterFields, DetailFields: TList); |
1048 |
var |
1049 |
i: Integer; |
1050 |
Idx: TIndexDef; |
1051 |
begin |
1052 |
MasterFields.Clear; |
1053 |
DetailFields.Clear; |
1054 |
if (MasterSource <> nil) and (MasterSource.DataSet <> nil) and |
1055 |
(Self.MasterFields <> '') then |
1056 |
begin |
1057 |
Idx := nil; |
1058 |
MasterSource.DataSet.GetFieldList(MasterFields, Self.MasterFields); |
1059 |
UpdateIndexDefs; |
1060 |
if IndexName <> '' then |
1061 |
Idx := IndexDefs.Find(IndexName) |
1062 |
else if IndexFieldNames <> '' then |
1063 |
Idx := IndexDefs.GetIndexForFields(IndexFieldNames, False) |
1064 |
else |
1065 |
for i := 0 to IndexDefs.Count - 1 do |
1066 |
if ixPrimary in IndexDefs[i].Options then |
1067 |
begin |
1068 |
Idx := IndexDefs[i]; |
1069 |
break; |
1070 |
end; |
1071 |
if Idx <> nil then |
1072 |
GetFieldList(DetailFields, Idx.Fields); |
1073 |
end; |
1074 |
end; |
1075 |
|
1076 |
procedure TIBTable.SetReadOnly(Value: Boolean); |
1077 |
begin |
1078 |
CheckInactive; |
1079 |
FReadOnly := Value; |
1080 |
end; |
1081 |
|
1082 |
procedure TIBTable.SetTableName(Value: String); |
1083 |
begin |
1084 |
if not (csReading in ComponentState) then |
1085 |
begin |
1086 |
CheckInactive; |
1087 |
if Value <> FTableName then |
1088 |
begin |
1089 |
ResetSQLStatements; |
1090 |
FRegenerateSQL := True; |
1091 |
FTableName := Value; |
1092 |
IndexName := ''; |
1093 |
IndexFieldNames := ''; |
1094 |
FPrimaryIndexFields := ''; |
1095 |
DataEvent(dePropertyChange, 0); |
1096 |
end; |
1097 |
end |
1098 |
else if Value <> FTableName then |
1099 |
FTableName := Value; |
1100 |
end; |
1101 |
|
1102 |
function TIBTable.GetIndexField(Index: Integer): TField; |
1103 |
var |
1104 |
I, Count: Integer; |
1105 |
FieldNames, FieldName: String; |
1106 |
begin |
1107 |
Result := nil; |
1108 |
FieldName := ''; |
1109 |
FieldNames := IndexFieldNames; |
1110 |
if FieldNames = '' then |
1111 |
begin |
1112 |
for I := 0 to IndexDefs.Count - 1 do |
1113 |
if (IndexDefs[i].Name = FIndexName) then |
1114 |
begin |
1115 |
FieldNames := IndexDefs[i].Fields; |
1116 |
break; |
1117 |
end; |
1118 |
end; |
1119 |
for I := 0 to Index do |
1120 |
begin |
1121 |
Count := Pos(';', FieldNames); {mbcs OK} |
1122 |
if Count = 0 then |
1123 |
FieldName := FieldNames |
1124 |
else begin |
1125 |
FieldName := Copy(FieldNames, 0, Count - 1); |
1126 |
System.Delete(FieldNames, 1, Count); |
1127 |
end; |
1128 |
end; |
1129 |
if FieldName <> '' then |
1130 |
Result := FieldByName(FieldName) |
1131 |
else |
1132 |
IBError(ibxeIndexFieldMissing, [nil]); |
1133 |
end; |
1134 |
|
1135 |
|
1136 |
procedure TIBTable.SetIndexField(Index: Integer; Value: TField); |
1137 |
begin |
1138 |
GetIndexField(Index).Assign(Value); |
1139 |
end; |
1140 |
|
1141 |
function TIBTable.GetIndexFieldCount: Integer; |
1142 |
var |
1143 |
I, Index: Integer; |
1144 |
FieldNames: String; |
1145 |
done: Boolean; |
1146 |
begin |
1147 |
FieldNames := IndexFieldNames; |
1148 |
if FieldNames = '' then |
1149 |
begin |
1150 |
for I := 0 to IndexDefs.Count - 1 do |
1151 |
if (IndexDefs[i].Name = FIndexName) then |
1152 |
begin |
1153 |
FieldNames := IndexDefs[i].Fields; |
1154 |
break; |
1155 |
end; |
1156 |
end; |
1157 |
if FieldNames = '' then |
1158 |
Result := 0 |
1159 |
else |
1160 |
begin |
1161 |
done := False; |
1162 |
Result := 1; |
1163 |
while not done do |
1164 |
begin |
1165 |
Index := Pos(';', FieldNames); {mbcs ok} |
1166 |
if Index <> 0 then |
1167 |
begin |
1168 |
System.Delete(FieldNames, 1, Index); |
1169 |
Inc(Result); |
1170 |
end else |
1171 |
done := True; |
1172 |
end; |
1173 |
end; |
1174 |
end; |
1175 |
|
1176 |
function TIBTable.GetTableNames: TStrings; |
1177 |
begin |
1178 |
FNameList.clear; |
1179 |
GetTableNamesFromServer; |
1180 |
Result := FNameList; |
1181 |
end; |
1182 |
|
1183 |
procedure TIBTable.GetTableNamesFromServer; |
1184 |
var |
1185 |
Query : TIBSQL; |
1186 |
begin |
1187 |
if not (csReading in ComponentState) then begin |
1188 |
ActivateConnection; |
1189 |
Database.InternalTransaction.StartTransaction; |
1190 |
Query := TIBSQL.Create(self); |
1191 |
try |
1192 |
Query.GoToFirstRecordOnExecute := False; |
1193 |
Query.Database := DataBase; |
1194 |
Query.Transaction := Database.InternalTransaction; |
1195 |
if (TableTypes * [ttSystem, ttView] = [ttSystem, ttView]) then |
1196 |
Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' {do not localize} |
1197 |
else if ttSystem in TableTypes then |
1198 |
Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize} |
1199 |
' where RDB$VIEW_BLR is NULL' {do not localize} |
1200 |
else if ttView in TableTypes then |
1201 |
Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize} |
1202 |
' where RDB$SYSTEM_FLAG = 0' {do not localize} |
1203 |
else |
1204 |
Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize} |
1205 |
' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize} |
1206 |
Query.Prepare; |
1207 |
Query.ExecQuery; |
1208 |
while (not Query.EOF) and Query.Next do |
1209 |
FNameList.Add (TrimRight(Query.Fields[0].AsString)); |
1210 |
finally |
1211 |
Query.Free; |
1212 |
Database.InternalTransaction.Commit; |
1213 |
end; |
1214 |
end; |
1215 |
end; |
1216 |
|
1217 |
procedure TIBTable.SwitchToIndex(); |
1218 |
begin |
1219 |
FSwitchingIndex := True; |
1220 |
InternalTableRefresh; |
1221 |
FSwitchingIndex := False; |
1222 |
end; |
1223 |
|
1224 |
procedure TIBTable.InternalTableRefresh(); |
1225 |
var |
1226 |
DBKey: TIBDBKey; |
1227 |
begin |
1228 |
CheckActive; |
1229 |
DBKey := CurrentDBKey; |
1230 |
FRegenerateSQL := True; |
1231 |
Reopen; |
1232 |
if DBKey.DBKey[0] <> 0 then |
1233 |
InternalGotoDBKey(DBKey); |
1234 |
end; |
1235 |
|
1236 |
procedure TIBTable.GenerateSQL; |
1237 |
var |
1238 |
i: Integer; |
1239 |
SQL: TStrings; |
1240 |
OrderByStr: string; |
1241 |
bWhereClausePresent: Boolean; |
1242 |
fn: string; |
1243 |
aField: TFieldDef; |
1244 |
begin |
1245 |
bWhereClausePresent := False; |
1246 |
Database.CheckActive; |
1247 |
Transaction.CheckInTransaction; |
1248 |
if IndexDefs.Updated = False then |
1249 |
IndexDefs.Update; |
1250 |
if IndexFieldNames <> '' then |
1251 |
OrderByStr := FormatFieldsList(IndexFieldNames) |
1252 |
else if IndexName <> '' then |
1253 |
OrderByStr := FormatFieldsList(IndexDefs[IndexDefs.Indexof (IndexName)].Fields) |
1254 |
else if FDefaultIndex and (FPrimaryIndexFields <> '') then |
1255 |
OrderByStr := FormatFieldsList(FPrimaryIndexFields); |
1256 |
SQL := TStringList.Create; |
1257 |
SQL.Text := 'select ' + {do not localize} |
1258 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + '.*, ' {do not localize} |
1259 |
+ 'RDB$DB_KEY as IBX_INTERNAL_DBKEY from ' {do not localize} |
1260 |
+ QuoteIdentifier(DataBase.SQLDialect, FTableName); |
1261 |
if Filtered and (Filter <> '') then |
1262 |
begin |
1263 |
SQL.Text := SQL.Text + ' where ' + Filter; {do not localize} |
1264 |
bWhereClausePresent := True; |
1265 |
end; |
1266 |
if (MasterSource <> nil) and (MasterSource.DataSet <> nil) and (MasterFields <> '') then |
1267 |
begin |
1268 |
if bWhereClausePresent then |
1269 |
SQL.Text := SQL.Text + ' AND ' {do not localize} |
1270 |
else |
1271 |
SQL.Text := SQL.Text + ' WHERE '; {do not localize} |
1272 |
ExtractLinkfields; |
1273 |
if FDetailFieldsList.Count < FMasterFieldsList.Count then |
1274 |
IBError(ibxeUnknownError, [nil]); |
1275 |
for i := 0 to FMasterFieldsList.Count - 1 do |
1276 |
begin |
1277 |
if i > 0 then |
1278 |
SQL.Text := SQL.Text + 'AND '; |
1279 |
aField := FieldDefs.Find(FDetailFieldsList.Strings[i]); |
1280 |
if assigned(aField) then |
1281 |
fn := GetDBAliasName(aField.FieldNo) |
1282 |
else |
1283 |
fn := FDetailFieldsList.Strings[i]; {something wrong if we get here - but should word} |
1284 |
SQL.Text := SQL.Text + |
1285 |
QuoteIdentifier(DataBase.SQLDialect, fn) + ' = :' + FMasterFieldsList.Strings[i]; |
1286 |
end; |
1287 |
end; |
1288 |
if OrderByStr <> '' then |
1289 |
SQL.Text := SQL.Text + ' order by ' + OrderByStr; {do not localize} |
1290 |
SelectSQL.Assign(SQL); |
1291 |
RefreshSQL.Text := 'select ' + {do not localize} |
1292 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + '.*, ' {do not localize} |
1293 |
+ 'RDB$DB_KEY as IBX_INTERNAL_DBKEY from ' {do not localize} |
1294 |
+ QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
1295 |
' where RDB$DB_KEY = :IBX_INTERNAL_DBKEY'; {do not localize} |
1296 |
WhereDBKeyRefreshSQL.Assign(RefreshSQL); |
1297 |
InternalPrepare; |
1298 |
SQL.Free; |
1299 |
end; |
1300 |
|
1301 |
procedure TIBTable.GenerateUpdateSQL; |
1302 |
var |
1303 |
InsertFieldList, InsertParamList, UpdateFieldList: string; |
1304 |
WherePrimaryFieldList, WhereAllFieldList: string; |
1305 |
|
1306 |
procedure GenerateFieldLists; |
1307 |
var |
1308 |
I: Integer; |
1309 |
begin |
1310 |
for I := 0 to FieldDefs.Count - 1 do begin |
1311 |
with FieldDefs[I] do begin |
1312 |
if not (InternalCalcField or (faReadOnly in Attributes) or |
1313 |
(DataType = ftUnknown)) then |
1314 |
begin |
1315 |
if ( InsertFieldList <> '' ) then begin |
1316 |
InsertFieldList := InsertFieldList + ', '; |
1317 |
InsertParamList := InsertParamList + ', '; |
1318 |
UpdateFieldList := UpdateFieldList + ', '; |
1319 |
if (DataType <> ftBlob) and (DataType <>ftMemo) then |
1320 |
WhereAllFieldList := WhereAllFieldList + ' AND '; |
1321 |
end; |
1322 |
InsertFieldList := InsertFieldList + |
1323 |
QuoteIdentifier(DataBase.SQLDialect, GetDBAliasName(FieldNo)); |
1324 |
InsertParamList := InsertParamList + ':' + Name; |
1325 |
UpdateFieldList := UpdateFieldList + |
1326 |
QuoteIdentifier(DataBase.SQLDialect, GetDBAliasName(FieldNo)) + |
1327 |
' = :' + Name; |
1328 |
if (DataType <> ftBlob) and (DataType <>ftMemo) then |
1329 |
WhereAllFieldList := WhereAllFieldList + |
1330 |
QuoteIdentifier(DataBase.SQLDialect, GetDBAliasName(FieldNo)) + ' = :' + Name; |
1331 |
end; |
1332 |
end; |
1333 |
end; |
1334 |
end; |
1335 |
|
1336 |
procedure GenerateWherePrimaryFieldList; |
1337 |
var |
1338 |
i: Integer; |
1339 |
tmp, fn: String; |
1340 |
aField: TFieldDef; |
1341 |
begin |
1342 |
i := 1; |
1343 |
while i <= Length(FPrimaryIndexFields) do |
1344 |
begin |
1345 |
tmp := ExtractFieldName(FPrimaryIndexFields, i); |
1346 |
aField := FieldDefs.Find(tmp); |
1347 |
if assigned(aField) then |
1348 |
fn := GetDBAliasName(aField.FieldNo) |
1349 |
else |
1350 |
fn := tmp; {something wrong if we get here - but will work in most cases} |
1351 |
tmp := |
1352 |
QuoteIdentifier(DataBase.SQLDialect, fn) + ' = :' + |
1353 |
QuoteIdentifier(DataBase.SQLDialect, tmp);{do not localize} |
1354 |
if WherePrimaryFieldList <> '' then |
1355 |
WherePrimaryFieldList := |
1356 |
WherePrimaryFieldList + ' AND ' + tmp |
1357 |
else |
1358 |
WherePrimaryFieldList := tmp; |
1359 |
end; |
1360 |
end; |
1361 |
|
1362 |
begin |
1363 |
if InternalGetUpdatable = False then |
1364 |
FReadOnly := True |
1365 |
else |
1366 |
begin |
1367 |
DeleteSQL.Text := 'delete from ' + {do not localize} |
1368 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
1369 |
' where RDB$DB_KEY = ' + ':IBX_INTERNAL_DBKEY'; {do not localize} |
1370 |
GenerateFieldLists; |
1371 |
InsertSQL.Text := 'insert into ' + {do not localize} |
1372 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
1373 |
' (' + InsertFieldList + {do not localize} |
1374 |
') values (' + InsertParamList + ')'; {do not localize} |
1375 |
ModifySQL.Text := 'update ' + |
1376 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
1377 |
' set ' + UpdateFieldList + {do not localize} |
1378 |
' where RDB$DB_KEY = :IBX_INTERNAL_DBKEY'; {do not localize} |
1379 |
WhereAllRefreshSQL.Text := 'select ' + {do not localize} |
1380 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + '.*, ' |
1381 |
+ 'RDB$DB_KEY as IBX_INTERNAL_DBKEY from ' {do not localize} |
1382 |
+ QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
1383 |
' where ' + WhereAllFieldList; {do not localize} |
1384 |
if FPrimaryIndexFields <> '' then |
1385 |
begin |
1386 |
GenerateWherePrimaryFieldList; |
1387 |
WherePrimaryRefreshSQL.Text := 'select ' + {do not localize} |
1388 |
QuoteIdentifier(DataBase.SQLDialect, FTableName) + '.*, ' {do not localize} |
1389 |
+ 'RDB$DB_KEY as IBX_INTERNAL_DBKEY from ' {do not localize} |
1390 |
+ QuoteIdentifier(DataBase.SQLDialect, FTableName) + |
1391 |
' where ' + WherePrimaryFieldList; {do not localize} |
1392 |
end; |
1393 |
try |
1394 |
InternalPrepare; |
1395 |
except |
1396 |
FReadonly := True; |
1397 |
end; |
1398 |
end; |
1399 |
end; |
1400 |
|
1401 |
procedure TIBTable.ResetSQLStatements; |
1402 |
begin |
1403 |
SelectSQL.Text := ''; |
1404 |
DeleteSQL.Text := ''; |
1405 |
InsertSQL.Text := ''; |
1406 |
ModifySQL.Text := ''; |
1407 |
RefreshSQL.Text := ''; |
1408 |
end; |
1409 |
|
1410 |
procedure TIBTable.SetTableTypes( |
1411 |
const Value: TIBTableTypes); |
1412 |
begin |
1413 |
FTableTypes := Value; |
1414 |
end; |
1415 |
|
1416 |
function TIBTable.InternalGotoDBKey(DBKey: TIBDBKey): Boolean; |
1417 |
|
1418 |
function DBKeyCompare (DBKey1, DBKey2: TIBDBKey): Boolean; |
1419 |
var |
1420 |
I: Integer; |
1421 |
begin |
1422 |
for I := 0 to 7 do |
1423 |
if (DBKey1.DBKey[i] <> DBKey2.DBKey[i]) then begin |
1424 |
result := False; |
1425 |
exit; |
1426 |
end; |
1427 |
result := True; |
1428 |
end; |
1429 |
begin |
1430 |
CheckActive; |
1431 |
DisableControls; |
1432 |
try |
1433 |
result := False; |
1434 |
First; |
1435 |
while ((not result) and (not EOF)) do begin |
1436 |
if (DBKeyCompare (DBKey, PRecordData(GetActiveBuf)^.rdDBKey)) then |
1437 |
result := True |
1438 |
else |
1439 |
Next; |
1440 |
end; |
1441 |
if not result then |
1442 |
First |
1443 |
else |
1444 |
CursorPosChanged; |
1445 |
finally |
1446 |
EnableControls; |
1447 |
end; |
1448 |
end; |
1449 |
|
1450 |
function TIBTable.GetCurrentDBKey: TIBDBKey; |
1451 |
var |
1452 |
Buf: pChar; |
1453 |
begin |
1454 |
CheckActive; |
1455 |
buf := GetActiveBuf; |
1456 |
if Buf <> nil then |
1457 |
Result := PRecordData(Buf)^.rdDBKey |
1458 |
else |
1459 |
Result.DBKey[0] := 0; |
1460 |
end; |
1461 |
|
1462 |
procedure TIBTable.Reopen; |
1463 |
begin |
1464 |
DisableControls; |
1465 |
try |
1466 |
if Active then |
1467 |
begin |
1468 |
SetState(dsInactive); |
1469 |
CloseCursor; |
1470 |
OpenCursor(false); |
1471 |
SetState(dsBrowse); |
1472 |
end; |
1473 |
finally |
1474 |
EnableControls; |
1475 |
end; |
1476 |
end; |
1477 |
|
1478 |
end. |