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Revision 49 by tony, Thu Feb 2 16:20:12 2017 UTC vs.
Revision 229 by tony, Tue Apr 10 13:32:36 2018 UTC

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1 < IBX Change Log  version                  (2.0-2) tba, 09 Jan 2017 15:31:49 +0000
1 > IBX Change Log  version             (2.3-0) Tue, 10 Apr 2018 14:27:10 +0100
2  
3 < 1. TIBDatabase.CreateDatabase: extract full DB Name using reg ex in order to
3 > IMPORTANT: the source code tree has been re-organised for IBX 2.3. Please remove
4 > all previous copies of the IBX source code tree before installing this release.
5 >
6 > The IBX packages used by most users have not changed, with one exception. The
7 > IBServices unit has been moved to the package iblegacyServices.lpk. To continue
8 > to use the IBServices unit in your applications, please add the iblegacyServices
9 > to the list of dependencies. To do this, open the Project Inspector and select
10 > Add->New Requirement and select "ibLegacyServices" from the list of available
11 > packages.
12 >
13 > 1. New unit IBXServices. The IBXServices unit is a re-architectured update of
14 >   the IBServices unit providing what is intended to be a clearer and easier to
15 >   use set of IB Services components. See Chapter 10 of the IBX User Guide for
16 >   more information and the guide to "Firebird Service Management Using IBX".
17 >   As indicated above, the legacy services components are still available and
18 >   provided in a separate package. There is no need to update working applications
19 >   using the older versions except for an additional package dependency.
20 >
21 > 2. The IBX packages and source code tree have been re-organised in an attempt to
22 >   finally get rid of the "duplicate ppu" warnings. This re-organisation should
23 >   not affect existing users. Section 2.3 of the IBX User Guide describes the
24 >   new set of IBX packages.
25 >
26 > 3. The ibx/examples/DBAdmin and the ibx/examples/services example have been
27 >   updated to use the new Services API components.
28 >
29 > 4. The iblocal package has been updated to use the new Services API components.
30 >
31 > 5. procedure SetAutoAdmin; in the new IBX Services this method is now a member of
32 >   TIBXSecurityService. It had been wrongly classified in the previous version
33 >   as a per database configuration item. It is global to a server and hence
34 >   correctly positioned as part of the Security Package. In the DBAdmin example,
35 >   the setting has moved to the mappings page.
36 >
37 > 6. TIBXScript: IgnoreCreateDatabase added. If true then CREATE DATABASE statements
38 >   are ignored.
39 >
40 > 7. TIBDatabase: DropDatabase now ensures that all transactions have been properly
41 >   closed before the database is dropped. Before and After Disconnect event handlers
42 >   are also fired.
43 >
44 > 8. TIBTransaction: OnStartTransaction event now fires every time the transaction
45 >   is started and not just the first time.
46 >
47 > 9. IBDataOutput: Use FormatFloat for all performance statistics to avoid platform
48 >   depenendency with comp type.
49 >
50 > 10. IBDataOutput: select query data output is now sent to stdout instead of stderr.
51 >
52 > 11. TIBDatabase: Remove regression. If a user login dialog changes the DatabaseName
53 >    then this is recognised and not ignored.
54 >
55 > 12. TIBDataSet, TIBQuery, TIBTable: additions:
56 >    function GetRowsAffected(var SelectCount, InsertCount, UpdateCount, DeleteCount: integer): boolean;
57 >    function GetPerfStatistics(var stats: TPerfCounters): boolean;
58 >    property EnableStatistics: boolean read FEnableStatistics write SetEnableStatistics;
59 >
60 >    GetRowsAffected returns the affected row counts from the last insert/update/delete
61 >    if EnableStatistics = true then GetPerfStatistics returns the current stats
62 >    counters for the select query. Note: stats accumulate after each fetch from
63 >    the database. To get total query cost after open, call the "Last" method
64 >    and then GetPerfStatistics.
65 >
66 >    See ibx/examples/consolemode for an example of the use of GetPerfStatistics
67 >
68 > 13. TIBExtract: Identity columns DDL. "Start with clause" now correctly encapsulated
69 >    in parenthesises.
70 >
71 > 14. TIBExtract: new published property "AlwaysQuoteIdentifiers". If true then in dialect 3
72 >    SQL identifiers are always delimited by double quotes. If false, then they are
73 >    only delimited if the identifier is a reserved word, contains lower case or special
74 >    characters. Set this property to true to retain previous behaviour.
75 >
76 > 15. Insert SQL Property Editor. In Insert Returning Clause, Identity column names
77 >    are now inserted in double quotes if not Reserved Words or valid SQL Identifiers.
78 >
79 > 16. TIBDataSet, TIBQuery, TIBTable: addition:
80 >       property MasterDetailDelay: integer {defaults to zero}
81 >
82 >    When non-zero and the dataset is a detail table referencing a master table
83 >    through either a MasterSource (TIBTable) or a DataSource (TIBDataSet, TIBQuery)
84 >    then a synchronisation delay is added (in milliseconds) between the master
85 >    row changing and the detail dataset being re-opened. If the master dataset
86 >    is scrolled before the delay expires then the delay is reset. This can be used
87 >    to avoid performance overheads when scrolling through a large master dataset.
88 >
89 >    Note: uses fptimer and hence requires a thread manager. Under Linux the
90 >    chreads unit must be included in your project. TTimer is not used in order
91 >    to avoid an LCL dependency. Requires FPC 3.0.2 or later.
92 >
93 > 17. TIBExtract: User role grants now excluded when etGrantsToUser not specified
94 >    with Extract Option eoDatabase.
95 >
96 > 18. TIBLookupComboEditBox: Workaround added for https://bugs.freepascal.org/view.php?id=33428
97 >    When a deLayoutChanged event is reported on the ListSource dataset, the
98 >    combobox text is updated. This allows a listsource (detail) to be in a Master/Detail
99 >    relationship with the control's datasource (master).
100 >
101 > 19. TIBExtract: Full BigInt value range now supported for Generators/Sequences.
102 >
103 > 20. TIBExtract: Select Procedures (Procedure type 1) now include "SUSPEND;" clause in their
104 >    stubs. Pedantic fix really, as procedures output in dependency order anyway.
105 >
106 > 21. TIBExtract: Package Headers and Package Bodies are now included in the extracted
107 >    DDL (Firebird 3 and later only).
108 >
109 > 22. TIBLookupComboBox Autocomplete Fixes:
110 >    i. Only appended text is now selected after autocomplete.
111 >    ii. Uppercase keys no longer ignored for autocomplete.
112 >    iii. Retain Prefix case is now honoured correctly.
113 >    iv. When a DataSource is assigned, typing after autocomplete now extends prefix
114 >        before autocomplete performed. i.e. behaviour now the same as when
115 >        no DataSource assigned.
116 >
117 > 23. TIBXScript: Single Line Comments starting with '--' are now ignored when occurring
118 >    between SQL statements.
119 >
120 > 24. TIBExtract: New published property CaseSensitiveObjectNames. If false (default) then
121 >    ObjectNames are converted to upper case before matching against metadata object
122 >    names, unless the objectname is delimited by double quotes, in which case, the
123 >    double quotes are removed and the remaining string is used (unmodified) to match
124 >    against the metadata object name.
125 >
126 >    If true then the ObjectName is used as is without modification and matched
127 >    against the metadata object name. No attempt is made to remove double quotes.
128 >
129 > 25. TIBExtract: New Extract Types: etDatabaseTriggers and etDDLTriggers. When used
130 >    with eoTrigger, these extract types can be used to select only Database Triggers,
131 >    or DDL Triggers or both. Ignored when etTable or etTrigger included in Extract Types.
132 >
133 > 26. TIBXScript: If an exception occurs during the processing of a statement, the
134 >    statement separate character is now reset to the default (';').
135 >
136 > 27. TIBDatabase: Reconnect method added and used by TIBXScript for reconnect.
137 >
138 > 28. TIBXScript: Transaction is no longer automatically reactivated immediately processing
139 >    a commit or reconnect statement and instead activated only when next SQL statement
140 >    is executed.
141 >
142 > 29. TIBSQL.HasField should no longer generate and exception when the field does not exist.
143 >
144 > 30. TIBXScript: case insensitive regex now used when matching statements instead of
145 >    converting statement to upper case.
146 >
147 > 31. TIBExtract: metadata comments now supported. New published property
148 >    IncludeMetaDataComments (default true). If true then metadata comments included
149 >    in extracted DDL. New Extract Object member eoComments. This may be used with
150 >    ExtractObject method to list all metadata comments.
151 >
152 > 32. TIBExtract: ListObjectNames method added.
153 >
154 > IBX Change Log  version  (2.2-0) Wed, 28 Feb 2018 10:57:45 +0000
155 >
156 > NOTE: THE LOCATIONS OF SOME OF THE UNIT DIRECTORIES HAS CHANGED FROM IBX 2.1. THIS IS TO
157 > AVOID DUPLICATE PPU WARNINGS. PLEASE REMOVE EARLIER VERSIONS OF IBX BEFORE INSTALLING THIS
158 > RELEASE.
159 >
160 > NOTE: THE DBADMIN DEMO REQUIRES THAT THE MemDSLaz PACKAGE IS INSTALLED IN THE LAZARUS IDE.
161 >
162 > 1. IBExtract: Identity columns - add additional check for null column for generator name.
163 >
164 > 2. IBCustomDataSet: Insert and Modify (Update) queries now recognise and process SQL RETURNING clauses.
165 >   The main use for this is for Firebird 3 Identity columns (see IBXDocumentation 6.6.8 for further
166 >   information). However, this is also a very useful mechanism for returning updated computed by
167 >   column values. Values returned as a result of executing an Insert or Update statement
168 >   replace existing values in the current row for each corresponding column.
169 >
170 >   Previously, if a dataset's select query included read only (computed by) fields then
171 >   an automatic row refresh was performed after an insert or update query had been processed,
172 >   irrespective of the setting of the "ForcedUpdates" property. This has changed such
173 >   that an automatic refresh is no longer performed if an insert or update query contains
174 >   a returning clause that updates one or more fields on the current row. A full row
175 >   refresh is only performed if (a) ForcedRefresh is true or (b) the query does not return any
176 >   field values and the select query contains read only fields. Use of Insert/update
177 >   returning should be significantly more efficient than executing a refresh query.
178 >
179 >   This behaviour change is intended to be backwards compatible and there should be no need to change
180 >   existing programs, other than to improve performance by using the new capability.
181 >
182 > 3. IBCustomDataSet: DELETE...RETURNING queries are now also recognised. However, as
183 >   they are called when the dataset row is being deleted, there is no value in
184 >   updating the current record from the query result. Instead, a new event handler
185 >   "OnDeleteReturning" is provided. If a DELETE...RETURNING query is execute and
186 >   an OnDeleteReturning event handler is provided then it is called with the IResults returned
187 >   by the query. The event handler can then interrogate the query results and
188 >   perform whatever action is necessary. For example to confirm, to the user,
189 >   the deletion of a row with the returned values.
190 >
191 > 4. TIBTable: generated Insert and Update SQL now include a RETURNING clause for
192 >   any Computed By or Identity Columns. The IBTables example has been updated to
193 >   illustrate the computation of the employee Full Name on update.
194 >
195 > 5. TIBTable: The GeneratorField property is now published.
196 >
197 > 6. The InsertSQL property editor now shows Firebird 3 Identity columns separate from the Field List.
198 >   When InsertSQL is generated, the Identity columns are not included in the list of values to
199 >   be inserted. A RETURNING clause is added to the insert statement to return the value of
200 >   each Identity column after the insert is executed.
201 >
202 > 7. The Modify Property Editor now generates Update SQL with Computed By fields in Update..Returning clause.
203 >   Similarly Insert Property Editor now generates Insert SQL with Computed By fields in
204 >   Insert..Returning clause.
205 >
206 > 8. TIBGenerator: small performance improvement by not preparing query each time
207 >   a new value is generated.
208 >
209 > 9. TIBSQL: Free resources when transaction changed - ensures new transaction is used.
210 >
211 > 10. Property editors will now sync table name to a System Table when "Include System
212 >    Tables" is selected and the query is for a System Table.
213 >
214 > 11. Minor Performance improvement to handling of Date/Time types in IBX datasets. Field
215 >    values are no longer converted to milliseconds from TDateTime and then back again
216 >    to TDateTime (the conversion to milliseconds is the default TDataset approach).
217 >
218 > 12. Property Editors handling of Stored Procedures.
219 >    * Select and Refresh: only show a list of stored procedures that return multiple rows (proc type 1) and
220 >      which have a non-empty list of output parameters (i.e. stored procedures that may be used in a select
221 >      query).
222 >    * Modify and Insert: only show a list of stored procedures that return at most a singleton row (proc type 2).
223 >
224 > 13. IBStoredProc: Now supports Firebird 3 Package Names. A new published property PackageName
225 >    can be used to select a package. If non-empty, the stored procedure name is
226 >    expected to be a stored procedure defined in the specified package and the
227 >    generated SQL will be as required for a stored procedure located in a package.
228 >
229 > 14. Select, Refresh, Insert, Modify, Delete and TIBSQL SQL Property Editors now include
230 >    a "Package Name" drop down box to allow selection of a Firebird 3 Package from
231 >    which a stored procedure can be selected. With no package name selected, non-package
232 >    stored procedures are listed.
233 >
234 > 15. TIBXScript: turn off database login prompt when reconnecting - this avoids prompting
235 >    for password on reconnect.
236 >
237 > 16. TIBDatabase: use IAttachment for connection default character set id, code page
238 >    and character set name.
239 >
240 > 17. TIBDatabaseInfo: cache ODS Version information on first request in order to minimise
241 >    DB info lookups"
242 >
243 > 18. IBExtract: now supports DDL Triggers and Grants to DDL objects.
244 >
245 > 19. Add a property Editor for TIBUpdate.RefreshSQL.
246 >
247 > 20. IBUpdate: Ignore non-data (e.g. calculated) fields when assembling list of input
248 >    parameters. This stops an exception being raised when the field cannot be
249 >    located in the record buffer.
250 >
251 > 21. Property Editors now automatically include System Tables when opened and when the query table
252 >    is a System Table.
253 >
254 > 22. IBServices: SQRB and SRB buffers are now reset when service query throws an exception.
255 >    This avoids errors due to a stale SQRB or SRB being used for the next query.
256 >
257 > 23. IBServices: Service attach parameters now include "expected_db". This is used to
258 >    add the SPB item isc_spb_expected_db. This names a database using
259 >    an alternative Security Database (FB3 onwards) and allows (e.g. backup/restore) using such a
260 >    database. examples/services re-written to illustrate use of "expected_db".
261 >
262 > 24. IBServices: TIBControlAndQueryService.WriteNextChunk no longer ignores isc_info_svc_timeout.
263 >    This avoids truncated backups when the server returns a timeout (busy) response.
264 >
265 > 25. TIBDatabase: isc_dpb_page_size now supported as a database parameter when using TIBDatabase.CreateDatabase.
266 >
267 > 26. TIBDatabase: DatabaseName property may now be prefixed by $TEMP$ or $DATADIR$ for local
268 >    databasenames. These are respectively expanded to the local system's temp directory
269 >    (including trailing delimiter) or to a prescribed data directory (including
270 >    trailing delimiter). Under Unix systems the data directory is a hidden directory
271 >    in the user's home directory. The hidden directory name is either the string returned
272 >    from the SysUtils "Vendor Name" or "IBX" if empty. In either case prefixed by a '.'.
273 >    Under Windows, the directory is the same as the Data Directory as decribed
274 >    above but instead prefixed by the User's application data path. These may be
275 >    used to improve application portability for Personal Databases.
276 >
277 > 27. TIBTable: FieldDefs property is no longer published. Due to the use of TIBFieldDef
278 >    this has not worked for a long time and is not useful either. FieldDefs should be
279 >    managed using the Fields Editor as with any other dataset. To access the fields
280 >    editor for a TIBTable component, double click on the component. The fields editor
281 >    is then displayed.
282 >
283 > 28. TIBDatabaseInfo: new properties/function
284 >     * DateDBCreated (returns date/time database created)
285 >     * TransactionCount (returns no. of active transactions)
286 >     * GetDatabasePage(PageNo: integer) (returns contents of specified database page - SYSDBA only).
287 >     * PagesFree (Firebird 3 or later)
288 >     * PagesUsed (Firebird 3 or later)
289 >     * Encrypted (returns true if database encrypted. (Firebird 3.0.3 or later only)
290 >     * EncryptionKeyName (returns the name of the encryption key if any (Firebird 3.0.3 or later only)
291 >
292 > 29. IBServices classes now provided the decoded release number in the (array) property ServerVersionNo.
293 >
294 > 30. TIBSecurityService now supports display/modification of the User Admin Role (Firebird 2.5 and later).
295 >
296 > 31. TIBConfigService now has a procedure SetAutoAdmin(Value: boolean) to enable/disable
297 >    the automtic mapping of privileged OS users to the RDB$ADMIN role (Firebird 2.5 and later).
298 >
299 > 32. TIBBackupService: New Option - NoDBTriggers equivalent to -nodbtriggers switch introduced
300 >    in the gbak utility at V.2.1 to prevent database-level and transaction-level triggers from
301 >    firing during backup and restore.
302 >
303 > 33. Both TIBBackupService and TIBRestoreService now support backup/restore statistics options
304 >    for verbose output using the new property "StatisticsRequested".
305 >    see https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-util-gbak.html#rnfb25-util-gbakstats
306 >
307 > 34. TIBRestoreService: now supports new options RestoreMetaDataOnly (Firebird 2.5 and later).
308 >
309 > 35. TIBOnlineValidationService component added to the IBServices and the "Firebird Admin"
310 >    palette. This uses the online validation feature added in Firebird 2.5. The
311 >    services's properties enable inclusion/exclusion of tables and indexes using
312 >    regular expressions. See.
313 >    https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-apiods-api.html#rnfb25-apiods-api-onlinevalidation
314 >
315 > 36. IBServices: procedure TIBConfigService.SetNoLinger added to set no linger
316 >    option on a database.
317 >
318 > 37. TIBCustomService: Assign method implemented to allow copying of service login
319 >    context between service API components. "Detach" method now only detaches
320 >    service when last reference to the service interface detaches. Tidy up of
321 >    code for SetActive and Attach methods including password hiding.
322 >
323 > 38. TIBDatabase: new properties: AuthenticationMethod and RemoteProtocol. Read only
324 >    and used to determine the auth method and protocol used for the connection.
325 >
326 > 39. TIBDatabase: ensure that SQLDialect setting is used when creating a database using
327 >    a Create Database Statement generated by IBX.
328 >
329 > 40. All IBServices now have an additional published property "PortNo". This may
330 >    be set to a non-standard port number when necessary. If zero then the default
331 >    port number is used.
332 >
333 > 41: TIBLookupComboeditBox: Ensure dataset updated when change selected with the keyboard
334 >    and not just the mouse.
335 >
336 > 42. TIBCustomDataset: reopen query if already active when a TIBControlLink is added.
337 >
338 > 43. TIBTreeview: new ImageIndexField and SelectedIndexField Property allows the
339 >    image index and selected image index for each node to be set from a database field.
340 >
341 > 44. TIBExtract: new extract type (etGrantsToUser) for use with eoDatabase. If included
342 >    then database schema includes grants to all users. If not present then the
343 >    only user grants included are those to User PUBLIC.
344 >
345 > 45. TIBTreeView: performance improvement. When expanding include both expanded node
346 >    and child nodes in dataset.
347 >
348 >
349 > IBX Change Log  version                            (2.1-0) Fri, 15 Dec 2017 12:20:11 +0000
350 >
351 > 1. IBCustomDataset: Minor change of PChar to PByte for compatibility with fbintf
352 >   changes.
353 >
354 > 2. IBCustomDataset: Fixed use of incorrect datasize in TIBStringField.SetAsString.
355 >   Bug could result in truncated multi-byte character set values.
356 >
357 > 3. Changes consequential on moving fbintf character set utility functions from
358 >   IFirebirdAPI to IAttachment.
359 >
360 > 4. Avoid "Object is nil" error when opening a database with DefaultSystemCodePage = true
361 >
362 > 5. IBLookupComboEditBox: avoid race condition when autocompleting text that occasionally
363 >   results in autocomplete ignoring prefix text.
364 >
365 > 6. IBLookupComboEditBox: Ensure that cursor is not reset to start of text when
366 >   entering a new name into the text box.
367 >
368 > 7. IBCustomDataset: ensure that TIBStringField uses the field size reported by
369 >   Firebird rather than recomputing it.
370 >
371 > 8. Property Editor positioning tidy up: All IBX Property editors should now be
372 >   screen centre. Previously some were "poDesigned" which may be inappropriate
373 >   for multi monitor desktops.
374 >
375 > 10. TIBTreeView.FindNode: protect against error if zero length path or empty tree node.
376 >
377 > 11. TIBTransaction: On Force Disconnect do not raise an exception when problem ending
378 >    a transaction and always reset the object.
379 >
380 > 12. TIBQuery tidyup: remove unnecessary call to GetAffectedRows.
381 >
382 > 13. TIBXScript: Allow for override of database filename in Create Database statements.
383 >
384 > 14. IBLocaldb: Support initialisation of the database from an SQL script in addition
385 >    to a gbak format archive.
386 >
387 > 15. IBLocaldb: fix problem that stopped the OnSharedDataDir event from being recognised.
388 >
389 > 16. IBLocaldb: Drop database if error creating an empty database.
390 >
391 > 17. TIBTreeView: improve performance when selecting node - avoid refreshing dataset
392 >    unless selected node not in current dataset.
393 >
394 > 18. IBServices: SetDBParams method moved from TCustomIBLocalDBSupport (in IBLocalDB package)
395 >    to TIBCustomService, and IBlocalDB code tidy up.
396 >
397 > 19. IBTreeView: Initialise TIBTreeNode KeyValue to null to avoid unpredictable
398 >    behaviour due to uninitialised variable.
399 >
400 > 20. IBServices: Correct encoding of isc_spb_prp_write_mode in TIBConfigService from
401 >    integer to byte. Ditto isc_spb_prp_reserve_space and isc_spb_prp_access_mode.
402 >
403 > 21. IBSQL: When Database changed ensure that all resources are freed.
404 >
405 > 22. IBCustomDataset: When database changed ensure that queries an unprepared.
406 >
407 > 23. SQL Property Editors now use SynEdit with SQL Highlighter. New features include:
408 >    * Line Wrap on SQL Token boundaries (on user command)
409 >    * auto-complete table names in drop down list of table names
410 >    * Double click on tablename or field name adds to SQL text
411 >
412 > 24. IBDataOutput: print statistics using float (%f) format instead of decimal (%d).
413 >
414 > 25. IBTreeView: Call to FindNode: param type change from "array of Variant" to
415 >    TVariantArray. Seems to avoid memory corruption in Windows (probably a
416 >    workaround for a problem in fpc 3.0.4 win64).
417 >
418 > 26. IBDatabaseInfo: Code tidy up. Add check for database not assigned or not open.
419 >
420 > 27. IBDatabaseInfo: Remove memory leak when accessing database operation counts.
421 >
422 > IBX Change Log  version                   (2.0-2) Fri, 24 Feb 2017 12:17:53 +0000
423 >
424 > 1. TIBDatabase.CreateDatabase: extract full DB Name from SQL using reg ex in order to
425     include remote system name.
426  
427   2. TIBExtract: No longer include comment header and COMMIT statement for empty
# Line 14 | Line 435 | IBX Change Log  version
435  
436   5. IBDynamicGrid: Update handling of navigation keys for a TDateEdit
437  
438 + 6. IBCustomDataset: Set internalunprepared flag when transaction ends. This ensures
439 +   that BindFields is called when the query is next activated. Avoids FieldName
440 +   not found error.
441 +
442 + 7. IBUpdate: This is a new IBX component similar to TIBUpdateSQL. It is more general
443 +   purpose and allows the programmer to define any action they want for Update, Insert
444 +   or Delete. This may be complex SQL (similar to a Trigger), application specific
445 +   filtering of updates, or use of statements such as Grant or Revoke instead of
446 +   normal DML. See User Manual for more information.
447 +
448   IBX Change Log  version                  (2.0-1) Mon, 09 Jan 2017 15:31:49 +0000
449  
450   1. TIBEvents: Fix uninitialised variable that could result in lost events.
# Line 62 | Line 493 | IBX Change Log  version
493  
494   IBX Change Log  version     (2.0-0) Tue, 06 Dec 2016 10:33:44 +0000
495  
496 < See also doc/readme.upgrade-4-x.to.2-0-0.xhtml for important information on
496 > See also doc/IBX4LazarusGuide.pdf for important information on
497   upgrading to IBX2.
498  
499   1. Size property of TIBStringField is now the width in characters of the field

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