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Revision 7 by tony, Sun Aug 5 18:28:19 2012 UTC vs.
Revision 271 by tony, Fri Jan 18 13:35:28 2019 UTC

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1	<	IBX Change Log  version >  (1.0-1) Sun, 05 Aug 2012 19:28:14 +0100
1	>	IBX Change Log  version (2.3-3 Build 11348) Fri, 28 Dec 2018 10:04:17 +0000
2	>
3	>	1. New property for TIBDatabase and TIBXServicesConnection. This is "ConfigOverrides"
4	>	and is used to override the default settings in the client side "firebird.conf" This
5	>	includes "WireCompression" and "WireCrypt". The value of this property is a "TStrings".
6	>	Each line of the string list should be a setting in the same format as "firebird.conf".
7	>	For example "WireCompression = true" in order to request wire compression on the client side.
8	>
9	>	Note: explicit settings in the client side "firebird.conf" appear to take precedence
10	>	over settings given in TIBDatabase and TIBXServicesConnection. Many client side settings
11	>	also require a compatible setting in the server side "firebird.conf". For example
12	>	"WireCompression = true" must also be set in the server's "firebird.conf" for wire
13	>	compression to be used.
14	>
15	>	Whether or not WireCompression or WireCrypt are in use can be checked using the information
16	>	returned with the Client/Server protocol version. See ibx/examples/dbadmin and
17	>	ibx/examples/dbinfo for examples of how to display this information.
18	>
19	>	2. New property for TIBDatabase and TIBXServicesConnection: "WireCompression". This
20	>	is a "convenience" property. If set the "WireCompression=true" is added to the
21	>	ConfigOverrides. If unchecked then this setting is removed.
22	>
23	>	3. TIBExtract: 64-bit integer types are now correctly extracted as "BIGINT" and
24	>	not "INT64".
25	>
26	>	4. New published properties for TIBCSVDataOut, TIBInsertStmtsOut and TIBBlockFormatOut
27	>	These are:
28	>	property TimestampFormat: string;
29	>	property DateFormat: string;
30	>	property TimeFormat: string;
31	>
32	>	Respectively, these provide the date time format templates for SQL types: TIMESTAMP,
33	>	DATETIME and TIME. The format strings use the standard FPC date/time format
34	>	characters (see https://www.freepascal.org/docs-html/rtl/sysutils/formatchars.html).
35	>
36	>	If any of the above properties are set to an empty string, then the locale default
37	>	is used. This uses the ShortDateFormat and the LongTimeFormat. In timestamp, the
38	>	locale default is extended by appending '.zzz' to include milliseconds.
39	>
40	>	TIBCSVDataOut by default sets these properties to the empty string, while the other
41	>	two use: 'yyyy.mm.dd hh:nn:ss.zzz', 'yyyy.mm.dd' and 'hh:nn:ss.zzz' respectively.
42	>
43	>	5. New published property for TIBCSVDataOut:
44	>	property QuoteStrings: boolean (default true)
45	>
46	>	If false then strings are unquoted, otherwise, the QuoteChar property value is
47	>	used to delimit each and every string in the output.
48	>
49	>	6. New published properties for TIBCSVDataOut:
50	>	property FieldSeparator: string;
51	>	property HeaderSeparator: string;
52	>
53	>	Respectively, these provide the separator character(s) used to separate fields
54	>	in data and header rows. Both default to ','.
55	>
56	>	7. New published properties for TIBCSVDataOut and TIBBlockFormatOut:
57	>	TOnFormatTextString = procedure(sender: TObject; var TextString: string) of object;
58	>	property OnFormatTextString;
59	>
60	>	This event handler can be used to process text strings before they are included
61	>	in the output e.g. to replace unprintable characters with alternative strings.
62	>	This only applies to columns with an SQL Type of SQL_VARYING and SQL_TEXT.
63	>
64	>	8. TIBDataSet now raises an exception when ParamByName called with an invalid parameter name.
65	>
66	>	9. TIBQuery now uses IBX SQL Parser instead of TParams SQL parser in order to ensure
67	>	consistency with SQL queries.
68	>
69	>	10. CaseSensitiveParameterNames property added to TIBSQL, TIBDataSet and TIBQuery.
70	>	When true, SQL statement parameter names are parsed case sensitive. Note for
71	>	TIBDataSet only applies to Select query.
72	>
73	>	11. IBEvents: removing a TIBEvent component from a form should no longer result in
74	>	an IDE exception.
75	>
76	>	IBX Change Log  version (2.3-2) Wed, 05 Dec 2018 12:19:23 +0000
77	>
78	>	1. Remove need to check for IsMultiThread by providing access to GUI timers via
79	>	IBGUIInterface. Note: master/detail delay timer does not apply to console
80	>	mode apps.
81	>
82	>	2. TIBCustomDataSet: SQLParser ignored if it does not contain a valid select
83	>	statement. This avoids problems if "Execute Block" is used as the Query.
84	>
85	>	3. IBSQLParser now uses the common SQL tokeniser from fbintf. This replaces the
86	>	internal SQL tokeniser routines.
87	>
88	>	4. IBSQLParser: new property NotaSelectStmt. Set to true if SQL fails to parse
89	>	as a select statement, with or without CTEs.
90	>
91	>	5. IBSQLParser: parser now recognises the "ROWS" clause.
92	>
93	>	6. TIBXScript now uses the common SQL tokeniser from fbintf. This replaces the
94	>	internal SQL tokeniser routines.
95	>
96	>	7.  Fix error in TIBXScript processing of "set" statements. This avoids exceptions
97	>	being raised for valid set statements processed by a data formatter.
98	>
99	>	8. New published property for TIBDatabase and TIBXServicesConnection. This is
100	>	FirebirdLibraryPathName: string. If not empty it is used to explicitly specify
101	>	the path of the Firebird Library used by the database/services connection.
102	>
103	>	9. New read only public property for TIBDatabase and TIBXServicesConnection. This
104	>	is FirebirdAPI and returns the IFirebirdAPI interface used by the database/
105	>	services connection.
106	>
107	>	10.SQL Property editors now quote parameter names if "Quote identifier" is selected
108	>	or param name is not a valid SQL identifier.
109	>
110	>	11. IBLookupComboEditBox: In Lazarus 2.0, TDBLookupComboBox takes a more restrictive
111	>	view of whether the text box should be editable when no DataSource is specified.
112	>	TIBLookupComboEditBox has been updated to workaround this problem. As long as
113	>	ReadOnly is false, the text box is editable when no DataSource is specified.
114	>
115	>	12. AllowUseOfFBLIB is now set to "true" at design time. This is to allow use of
116	>	the FBLIB environment variable. If you do not want to permit this then you
117	>	must modify the Register procedure in the design/IBDBReg.pas unit to remove
118	>	this setting.
119	>
120	>	IBX Change Log  version                 (2.3-1) Thu, 25 Oct 2018 14:39:45 +0100
121	>
122	>	1. IBCustomDataset: replace deprecated function ValidUTF8String with call to
123	>	Utf8EscapeControlChars
124	>
125	>	IBX Change Log  version                (2.3-0) Mon, 16 Apr 2018 09:48:06 +0100
126	>
127	>	IMPORTANT: the source code tree has been re-organised for IBX 2.3. Please remove
128	>	all previous copies of the IBX source code tree before installing this release.
129	>
130	>	The IBX packages used by most users have not changed, with one exception. The
131	>	IBServices unit has been moved to the package iblegacyServices.lpk. To continue
132	>	to use the IBServices unit in your applications, please add the iblegacyServices
133	>	to the list of dependencies. To do this, open the Project Inspector and select
134	>	Add->New Requirement and select "ibLegacyServices" from the list of available
135	>	packages.
136	>
137	>	1. New unit IBXServices. The IBXServices unit is a re-architectured update of
138	>	the IBServices unit providing what is intended to be a clearer and easier to
139	>	use set of IB Services components. See Chapter 10 of the IBX User Guide for
140	>	more information and the guide to "Firebird Service Management Using IBX".
141	>	As indicated above, the legacy services components are still available and
142	>	provided in a separate package. There is no need to update working applications
143	>	using the older versions except for an additional package dependency.
144	>
145	>	2. The IBX packages and source code tree have been re-organised in an attempt to
146	>	finally get rid of the "duplicate ppu" warnings. This re-organisation should
147	>	not affect existing users. Section 2.3 of the IBX User Guide describes the
148	>	new set of IBX packages.
149	>
150	>	3. The ibx/examples/DBAdmin and the ibx/examples/services example have been
151	>	updated to use the new Services API components.
152	>
153	>	4. The iblocal package has been updated to use the new Services API components.
154	>
155	>	5. procedure SetAutoAdmin; in the new IBX Services this method is now a member of
156	>	TIBXSecurityService. It had been wrongly classified in the previous version
157	>	as a per database configuration item. It is global to a server and hence
158	>	correctly positioned as part of the Security Package. In the DBAdmin example,
159	>	the setting has moved to the mappings page.
160	>
161	>	6. TIBXScript: IgnoreCreateDatabase added. If true then CREATE DATABASE statements
162	>	are ignored.
163	>
164	>	7. TIBDatabase: DropDatabase now ensures that all transactions have been properly
165	>	closed before the database is dropped. Before and After Disconnect event handlers
166	>	are also fired.
167	>
168	>	8. TIBTransaction: OnStartTransaction event now fires every time the transaction
169	>	is started and not just the first time.
170	>
171	>	9. IBDataOutput: Use FormatFloat for all performance statistics to avoid platform
172	>	depenendency with comp type.
173	>
174	>	10. IBDataOutput: select query data output is now sent to stdout instead of stderr.
175	>
176	>	11. TIBDatabase: Remove regression. If a user login dialog changes the DatabaseName
177	>	then this is recognised and not ignored.
178	>
179	>	12. TIBDataSet, TIBQuery, TIBTable: additions:
180	>	function GetRowsAffected(var SelectCount, InsertCount, UpdateCount, DeleteCount: integer): boolean;
181	>	function GetPerfStatistics(var stats: TPerfCounters): boolean;
182	>	property EnableStatistics: boolean read FEnableStatistics write SetEnableStatistics;
183	>
184	>	GetRowsAffected returns the affected row counts from the last insert/update/delete
185	>	if EnableStatistics = true then GetPerfStatistics returns the current stats
186	>	counters for the select query. Note: stats accumulate after each fetch from
187	>	the database. To get total query cost after open, call the "Last" method
188	>	and then GetPerfStatistics.
189	>
190	>	See ibx/examples/consolemode for an example of the use of GetPerfStatistics
191	>
192	>	13. TIBExtract: Identity columns DDL. "Start with clause" now correctly encapsulated
193	>	in parenthesises.
194	>
195	>	14. TIBExtract: new published property "AlwaysQuoteIdentifiers". If true then in dialect 3
196	>	SQL identifiers are always delimited by double quotes. If false, then they are
197	>	only delimited if the identifier is a reserved word, contains lower case or special
198	>	characters. Set this property to true to retain previous behaviour.
199	>
200	>	15. Insert SQL Property Editor. In Insert Returning Clause, Identity column names
201	>	are now inserted in double quotes if not Reserved Words or valid SQL Identifiers.
202	>
203	>	16. TIBDataSet, TIBQuery, TIBTable: addition:
204	>	property MasterDetailDelay: integer {defaults to zero}
205	>
206	>	When non-zero and the dataset is a detail table referencing a master table
207	>	through either a MasterSource (TIBTable) or a DataSource (TIBDataSet, TIBQuery)
208	>	then a synchronisation delay is added (in milliseconds) between the master
209	>	row changing and the detail dataset being re-opened. If the master dataset
210	>	is scrolled before the delay expires then the delay is reset. This can be used
211	>	to avoid performance overheads when scrolling through a large master dataset.
212	>
213	>	Note: uses fptimer and hence requires a thread manager. Under Linux the
214	>	chreads unit must be included in your project. TTimer is not used in order
215	>	to avoid an LCL dependency. Requires FPC 3.0.2 or later.
216	>
217	>	17. TIBExtract: User role grants now excluded when etGrantsToUser not specified
218	>	with Extract Option eoDatabase.
219	>
220	>	18. TIBLookupComboEditBox: Workaround added for https://bugs.freepascal.org/view.php?id=33428
221	>	When a deLayoutChanged event is reported on the ListSource dataset, the
222	>	combobox text is updated. This allows a listsource (detail) to be in a Master/Detail
223	>	relationship with the control's datasource (master).
224	>
225	>	19. TIBExtract: Full BigInt value range now supported for Generators/Sequences.
226	>
227	>	20. TIBExtract: Select Procedures (Procedure type 1) now include "SUSPEND;" clause in their
228	>	stubs. Pedantic fix really, as procedures output in dependency order anyway.
229	>
230	>	21. TIBExtract: Package Headers and Package Bodies are now included in the extracted
231	>	DDL (Firebird 3 and later only).
232	>
233	>	22. TIBLookupComboBox Autocomplete Fixes:
234	>	i. Only appended text is now selected after autocomplete.
235	>	ii. Uppercase keys no longer ignored for autocomplete.
236	>	iii. Retain Prefix case is now honoured correctly.
237	>	iv. When a DataSource is assigned, typing after autocomplete now extends prefix
238	>	before autocomplete performed. i.e. behaviour now the same as when
239	>	no DataSource assigned.
240	>
241	>	23. TIBXScript: Single Line Comments starting with '--' are now ignored when occurring
242	>	between SQL statements.
243	>
244	>	24. TIBExtract: New published property CaseSensitiveObjectNames. If false (default) then
245	>	ObjectNames are converted to upper case before matching against metadata object
246	>	names, unless the objectname is delimited by double quotes, in which case, the
247	>	double quotes are removed and the remaining string is used (unmodified) to match
248	>	against the metadata object name.
249	>
250	>	If true then the ObjectName is used as is without modification and matched
251	>	against the metadata object name. No attempt is made to remove double quotes.
252	>
253	>	25. TIBExtract: New Extract Types: etDatabaseTriggers and etDDLTriggers. When used
254	>	with eoTrigger, these extract types can be used to select only Database Triggers,
255	>	or DDL Triggers or both. Ignored when etTable or etTrigger included in Extract Types.
256	>
257	>	26. TIBXScript: If an exception occurs during the processing of a statement, the
258	>	statement separate character is now reset to the default (';').
259	>
260	>	27. TIBDatabase: Reconnect method added and used by TIBXScript for reconnect.
261	>
262	>	28. TIBXScript: Transaction is no longer automatically reactivated immediately processing
263	>	a commit or reconnect statement and instead activated only when next SQL statement
264	>	is executed.
265	>
266	>	29. TIBSQL.HasField should no longer generate and exception when the field does not exist.
267	>
268	>	30. TIBXScript: case insensitive regex now used when matching statements instead of
269	>	converting statement to upper case.
270	>
271	>	31. TIBExtract: metadata comments now supported. New published property
272	>	IncludeMetaDataComments (default true). If true then metadata comments included
273	>	in extracted DDL. New Extract Object member eoComments. This may be used with
274	>	ExtractObject method to list all metadata comments.
275	>
276	>	32. TIBExtract: ListObjectNames method added.
277	>
278	>	33. Updated Database component editor to support additional connection string
279	>	types.
280	>
281	>	IBX Change Log  version  (2.2-0) Wed, 28 Feb 2018 10:57:45 +0000
282	>
283	>	NOTE: THE LOCATIONS OF SOME OF THE UNIT DIRECTORIES HAS CHANGED FROM IBX 2.1. THIS IS TO
284	>	AVOID DUPLICATE PPU WARNINGS. PLEASE REMOVE EARLIER VERSIONS OF IBX BEFORE INSTALLING THIS
285	>	RELEASE.
286	>
287	>	NOTE: THE DBADMIN DEMO REQUIRES THAT THE MemDSLaz PACKAGE IS INSTALLED IN THE LAZARUS IDE.
288	>
289	>	1. IBExtract: Identity columns - add additional check for null column for generator name.
290	>
291	>	2. IBCustomDataSet: Insert and Modify (Update) queries now recognise and process SQL RETURNING clauses.
292	>	The main use for this is for Firebird 3 Identity columns (see IBXDocumentation 6.6.8 for further
293	>	information). However, this is also a very useful mechanism for returning updated computed by
294	>	column values. Values returned as a result of executing an Insert or Update statement
295	>	replace existing values in the current row for each corresponding column.
296	>
297	>	Previously, if a dataset's select query included read only (computed by) fields then
298	>	an automatic row refresh was performed after an insert or update query had been processed,
299	>	irrespective of the setting of the "ForcedUpdates" property. This has changed such
300	>	that an automatic refresh is no longer performed if an insert or update query contains
301	>	a returning clause that updates one or more fields on the current row. A full row
302	>	refresh is only performed if (a) ForcedRefresh is true or (b) the query does not return any
303	>	field values and the select query contains read only fields. Use of Insert/update
304	>	returning should be significantly more efficient than executing a refresh query.
305	>
306	>	This behaviour change is intended to be backwards compatible and there should be no need to change
307	>	existing programs, other than to improve performance by using the new capability.
308	>
309	>	3. IBCustomDataSet: DELETE...RETURNING queries are now also recognised. However, as
310	>	they are called when the dataset row is being deleted, there is no value in
311	>	updating the current record from the query result. Instead, a new event handler
312	>	"OnDeleteReturning" is provided. If a DELETE...RETURNING query is execute and
313	>	an OnDeleteReturning event handler is provided then it is called with the IResults returned
314	>	by the query. The event handler can then interrogate the query results and
315	>	perform whatever action is necessary. For example to confirm, to the user,
316	>	the deletion of a row with the returned values.
317	>
318	>	4. TIBTable: generated Insert and Update SQL now include a RETURNING clause for
319	>	any Computed By or Identity Columns. The IBTables example has been updated to
320	>	illustrate the computation of the employee Full Name on update.
321	>
322	>	5. TIBTable: The GeneratorField property is now published.
323	>
324	>	6. The InsertSQL property editor now shows Firebird 3 Identity columns separate from the Field List.
325	>	When InsertSQL is generated, the Identity columns are not included in the list of values to
326	>	be inserted. A RETURNING clause is added to the insert statement to return the value of
327	>	each Identity column after the insert is executed.
328	>
329	>	7. The Modify Property Editor now generates Update SQL with Computed By fields in Update..Returning clause.
330	>	Similarly Insert Property Editor now generates Insert SQL with Computed By fields in
331	>	Insert..Returning clause.
332	>
333	>	8. TIBGenerator: small performance improvement by not preparing query each time
334	>	a new value is generated.
335	>
336	>	9. TIBSQL: Free resources when transaction changed - ensures new transaction is used.
337	>
338	>	10. Property editors will now sync table name to a System Table when "Include System
339	>	Tables" is selected and the query is for a System Table.
340	>
341	>	11. Minor Performance improvement to handling of Date/Time types in IBX datasets. Field
342	>	values are no longer converted to milliseconds from TDateTime and then back again
343	>	to TDateTime (the conversion to milliseconds is the default TDataset approach).
344	>
345	>	12. Property Editors handling of Stored Procedures.
346	>	* Select and Refresh: only show a list of stored procedures that return multiple rows (proc type 1) and
347	>	which have a non-empty list of output parameters (i.e. stored procedures that may be used in a select
348	>	query).
349	>	* Modify and Insert: only show a list of stored procedures that return at most a singleton row (proc type 2).
350	>
351	>	13. IBStoredProc: Now supports Firebird 3 Package Names. A new published property PackageName
352	>	can be used to select a package. If non-empty, the stored procedure name is
353	>	expected to be a stored procedure defined in the specified package and the
354	>	generated SQL will be as required for a stored procedure located in a package.
355	>
356	>	14. Select, Refresh, Insert, Modify, Delete and TIBSQL SQL Property Editors now include
357	>	a "Package Name" drop down box to allow selection of a Firebird 3 Package from
358	>	which a stored procedure can be selected. With no package name selected, non-package
359	>	stored procedures are listed.
360	>
361	>	15. TIBXScript: turn off database login prompt when reconnecting - this avoids prompting
362	>	for password on reconnect.
363	>
364	>	16. TIBDatabase: use IAttachment for connection default character set id, code page
365	>	and character set name.
366	>
367	>	17. TIBDatabaseInfo: cache ODS Version information on first request in order to minimise
368	>	DB info lookups"
369	>
370	>	18. IBExtract: now supports DDL Triggers and Grants to DDL objects.
371	>
372	>	19. Add a property Editor for TIBUpdate.RefreshSQL.
373	>
374	>	20. IBUpdate: Ignore non-data (e.g. calculated) fields when assembling list of input
375	>	parameters. This stops an exception being raised when the field cannot be
376	>	located in the record buffer.
377	>
378	>	21. Property Editors now automatically include System Tables when opened and when the query table
379	>	is a System Table.
380	>
381	>	22. IBServices: SQRB and SRB buffers are now reset when service query throws an exception.
382	>	This avoids errors due to a stale SQRB or SRB being used for the next query.
383	>
384	>	23. IBServices: Service attach parameters now include "expected_db". This is used to
385	>	add the SPB item isc_spb_expected_db. This names a database using
386	>	an alternative Security Database (FB3 onwards) and allows (e.g. backup/restore) using such a
387	>	database. examples/services re-written to illustrate use of "expected_db".
388	>
389	>	24. IBServices: TIBControlAndQueryService.WriteNextChunk no longer ignores isc_info_svc_timeout.
390	>	This avoids truncated backups when the server returns a timeout (busy) response.
391	>
392	>	25. TIBDatabase: isc_dpb_page_size now supported as a database parameter when using TIBDatabase.CreateDatabase.
393	>
394	>	26. TIBDatabase: DatabaseName property may now be prefixed by $TEMP$ or $DATADIR$ for local
395	>	databasenames. These are respectively expanded to the local system's temp directory
396	>	(including trailing delimiter) or to a prescribed data directory (including
397	>	trailing delimiter). Under Unix systems the data directory is a hidden directory
398	>	in the user's home directory. The hidden directory name is either the string returned
399	>	from the SysUtils "Vendor Name" or "IBX" if empty. In either case prefixed by a '.'.
400	>	Under Windows, the directory is the same as the Data Directory as decribed
401	>	above but instead prefixed by the User's application data path. These may be
402	>	used to improve application portability for Personal Databases.
403	>
404	>	27. TIBTable: FieldDefs property is no longer published. Due to the use of TIBFieldDef
405	>	this has not worked for a long time and is not useful either. FieldDefs should be
406	>	managed using the Fields Editor as with any other dataset. To access the fields
407	>	editor for a TIBTable component, double click on the component. The fields editor
408	>	is then displayed.
409	>
410	>	28. TIBDatabaseInfo: new properties/function
411	>	* DateDBCreated (returns date/time database created)
412	>	* TransactionCount (returns no. of active transactions)
413	>	* GetDatabasePage(PageNo: integer) (returns contents of specified database page - SYSDBA only).
414	>	* PagesFree (Firebird 3 or later)
415	>	* PagesUsed (Firebird 3 or later)
416	>	* Encrypted (returns true if database encrypted. (Firebird 3.0.3 or later only)
417	>	* EncryptionKeyName (returns the name of the encryption key if any (Firebird 3.0.3 or later only)
418	>
419	>	29. IBServices classes now provided the decoded release number in the (array) property ServerVersionNo.
420	>
421	>	30. TIBSecurityService now supports display/modification of the User Admin Role (Firebird 2.5 and later).
422	>
423	>	31. TIBConfigService now has a procedure SetAutoAdmin(Value: boolean) to enable/disable
424	>	the automtic mapping of privileged OS users to the RDB$ADMIN role (Firebird 2.5 and later).
425	>
426	>	32. TIBBackupService: New Option - NoDBTriggers equivalent to -nodbtriggers switch introduced
427	>	in the gbak utility at V.2.1 to prevent database-level and transaction-level triggers from
428	>	firing during backup and restore.
429	>
430	>	33. Both TIBBackupService and TIBRestoreService now support backup/restore statistics options
431	>	for verbose output using the new property "StatisticsRequested".
432	>	see https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-util-gbak.html#rnfb25-util-gbakstats
433	>
434	>	34. TIBRestoreService: now supports new options RestoreMetaDataOnly (Firebird 2.5 and later).
435	>
436	>	35. TIBOnlineValidationService component added to the IBServices and the "Firebird Admin"
437	>	palette. This uses the online validation feature added in Firebird 2.5. The
438	>	services's properties enable inclusion/exclusion of tables and indexes using
439	>	regular expressions. See.
440	>	https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-apiods-api.html#rnfb25-apiods-api-onlinevalidation
441	>
442	>	36. IBServices: procedure TIBConfigService.SetNoLinger added to set no linger
443	>	option on a database.
444	>
445	>	37. TIBCustomService: Assign method implemented to allow copying of service login
446	>	context between service API components. "Detach" method now only detaches
447	>	service when last reference to the service interface detaches. Tidy up of
448	>	code for SetActive and Attach methods including password hiding.
449	>
450	>	38. TIBDatabase: new properties: AuthenticationMethod and RemoteProtocol. Read only
451	>	and used to determine the auth method and protocol used for the connection.
452	>
453	>	39. TIBDatabase: ensure that SQLDialect setting is used when creating a database using
454	>	a Create Database Statement generated by IBX.
455	>
456	>	40. All IBServices now have an additional published property "PortNo". This may
457	>	be set to a non-standard port number when necessary. If zero then the default
458	>	port number is used.
459	>
460	>	41: TIBLookupComboeditBox: Ensure dataset updated when change selected with the keyboard
461	>	and not just the mouse.
462	>
463	>	42. TIBCustomDataset: reopen query if already active when a TIBControlLink is added.
464	>
465	>	43. TIBTreeview: new ImageIndexField and SelectedIndexField Property allows the
466	>	image index and selected image index for each node to be set from a database field.
467	>
468	>	44. TIBExtract: new extract type (etGrantsToUser) for use with eoDatabase. If included
469	>	then database schema includes grants to all users. If not present then the
470	>	only user grants included are those to User PUBLIC.
471	>
472	>	45. TIBTreeView: performance improvement. When expanding include both expanded node
473	>	and child nodes in dataset.
474	>
475	>
476	>	IBX Change Log  version                            (2.1-0) Fri, 15 Dec 2017 12:20:11 +0000
477	>
478	>	1. IBCustomDataset: Minor change of PChar to PByte for compatibility with fbintf
479	>	changes.
480	>
481	>	2. IBCustomDataset: Fixed use of incorrect datasize in TIBStringField.SetAsString.
482	>	Bug could result in truncated multi-byte character set values.
483	>
484	>	3. Changes consequential on moving fbintf character set utility functions from
485	>	IFirebirdAPI to IAttachment.
486	>
487	>	4. Avoid "Object is nil" error when opening a database with DefaultSystemCodePage = true
488	>
489	>	5. IBLookupComboEditBox: avoid race condition when autocompleting text that occasionally
490	>	results in autocomplete ignoring prefix text.
491	>
492	>	6. IBLookupComboEditBox: Ensure that cursor is not reset to start of text when
493	>	entering a new name into the text box.
494	>
495	>	7. IBCustomDataset: ensure that TIBStringField uses the field size reported by
496	>	Firebird rather than recomputing it.
497	>
498	>	8. Property Editor positioning tidy up: All IBX Property editors should now be
499	>	screen centre. Previously some were "poDesigned" which may be inappropriate
500	>	for multi monitor desktops.
501	>
502	>	10. TIBTreeView.FindNode: protect against error if zero length path or empty tree node.
503	>
504	>	11. TIBTransaction: On Force Disconnect do not raise an exception when problem ending
505	>	a transaction and always reset the object.
506	>
507	>	12. TIBQuery tidyup: remove unnecessary call to GetAffectedRows.
508	>
509	>	13. TIBXScript: Allow for override of database filename in Create Database statements.
510	>
511	>	14. IBLocaldb: Support initialisation of the database from an SQL script in addition
512	>	to a gbak format archive.
513	>
514	>	15. IBLocaldb: fix problem that stopped the OnSharedDataDir event from being recognised.
515	>
516	>	16. IBLocaldb: Drop database if error creating an empty database.
517	>
518	>	17. TIBTreeView: improve performance when selecting node - avoid refreshing dataset
519	>	unless selected node not in current dataset.
520	>
521	>	18. IBServices: SetDBParams method moved from TCustomIBLocalDBSupport (in IBLocalDB package)
522	>	to TIBCustomService, and IBlocalDB code tidy up.
523	>
524	>	19. IBTreeView: Initialise TIBTreeNode KeyValue to null to avoid unpredictable
525	>	behaviour due to uninitialised variable.
526	>
527	>	20. IBServices: Correct encoding of isc_spb_prp_write_mode in TIBConfigService from
528	>	integer to byte. Ditto isc_spb_prp_reserve_space and isc_spb_prp_access_mode.
529	>
530	>	21. IBSQL: When Database changed ensure that all resources are freed.
531	>
532	>	22. IBCustomDataset: When database changed ensure that queries an unprepared.
533	>
534	>	23. SQL Property Editors now use SynEdit with SQL Highlighter. New features include:
535	>	* Line Wrap on SQL Token boundaries (on user command)
536	>	* auto-complete table names in drop down list of table names
537	>	* Double click on tablename or field name adds to SQL text
538	>
539	>	24. IBDataOutput: print statistics using float (%f) format instead of decimal (%d).
540	>
541	>	25. IBTreeView: Call to FindNode: param type change from "array of Variant" to
542	>	TVariantArray. Seems to avoid memory corruption in Windows (probably a
543	>	workaround for a problem in fpc 3.0.4 win64).
544	>
545	>	26. IBDatabaseInfo: Code tidy up. Add check for database not assigned or not open.
546	>
547	>	27. IBDatabaseInfo: Remove memory leak when accessing database operation counts.
548	>
549	>	IBX Change Log  version                   (2.0-2) Fri, 24 Feb 2017 12:17:53 +0000
550	>
551	>	1. TIBDatabase.CreateDatabase: extract full DB Name from SQL using reg ex in order to
552	>	include remote system name.
553	>
554	>	2. TIBExtract: No longer include comment header and COMMIT statement for empty
555	>	tables when data included in output.
556	>
557	>	3. Profiling: IBSQL now has conditional compilation flags to enable query performance
558	>	and timing information to be written to stdout. This may be used to locate
559	>	performance bottlenecks.
560	>
561	>	4. SQLParser: only call "OnChanging" event handler when value is different.
562	>
563	>	5. IBDynamicGrid: Update handling of navigation keys for a TDateEdit
564	>
565	>	6. IBCustomDataset: Set internalunprepared flag when transaction ends. This ensures
566	>	that BindFields is called when the query is next activated. Avoids FieldName
567	>	not found error.
568	>
569	>	7. IBUpdate: This is a new IBX component similar to TIBUpdateSQL. It is more general
570	>	purpose and allows the programmer to define any action they want for Update, Insert
571	>	or Delete. This may be complex SQL (similar to a Trigger), application specific
572	>	filtering of updates, or use of statements such as Grant or Revoke instead of
573	>	normal DML. See User Manual for more information.
574	>
575	>	IBX Change Log  version                  (2.0-1) Mon, 09 Jan 2017 15:31:49 +0000
576	>
577	>	1. TIBEvents: Fix uninitialised variable that could result in lost events.
578	>
579	>	2. TIBExtract: Added support for FB3 "USAGE" privilege.
580	>
581	>	3. TIBExtract: data formatted as Charset set "octets" is now output using
582	>	hexadecimal notation.
583	>
584	>	4. TIBExtract: Binary Blobs and array data can now be embedded in INSERT statements
585	>	using a simple XML format.
586	>
587	>	5. TIBExtract: extract of individual Triggers and Stored Procedures can now include
588	>	grants to these objects.
589	>
590	>	6. TIBExtract: Stored Procedures and Views output in dependency order to avoid
591	>	dependency problems restoring complex databases.
592	>
593	>	7. TIBXScript: This component has been restructured to allow for the processing of
594	>	embedded XML in INSERT statements and to support interactive sources in addition
595	>	to non-interactive data sources such as files.
596	>
597	>	8. TIBXScript: CREATE DATABASE, DROP DATABASE, CONNECT statements are now supported.
598	>
599	>	9. TIBXScript: ISQL compatiable Set statements are now supported:
600	>	SET SQL DIALECT
601	>	SET TERM
602	>	SET AUTODDL
603	>	SET BAIL
604	>	SET ECHO
605	>	SET COUNT
606	>	SET STATS
607	>	SET NAMES <character set>
608	>
609	>	10. IBVersion unit added to hold current IBX Version Number information.
610	>
611	>	11. TIBExtract: Use character rather than byte length for VarChar procedure arguments.,
612	>	and domain definitions.
613	>
614	>	12. TIBExtract: Triggers now use SQL2003 syntax and database and transaction triggers
615	>	fully supported.
616	>
617	>	13. TIBExtract: when a database dump includes data, the generator values are now also set.
618	>
619	>	14: IBSQLEdit: Unit LCLPlatformDef added to uses clauses for lazarus 1.7 and later.
620	>
621	>	IBX Change Log  version     (2.0-0) Tue, 06 Dec 2016 10:33:44 +0000
622	>
623	>	See also doc/IBX4LazarusGuide.pdf for important information on
624	>	upgrading to IBX2.
625	>
626	>	1. Size property of TIBStringField is now the width in characters of the field
627	>	and not the byte length. This applies only to multi-byte character sets such
628	>	as UTF8. The original approach aligned with TStringField. However, the TStringField
629	>	code is not recognised as a bug and hence this change to align the behaviour.
630	>	The TStringField change is expected in fpc 3.2.0.
631	>
632	>	2. A new property AutoFieldSize: boolean has been added to TIBStringField. When
633	>	true (default) then Size property value saved in the lfm is ignored. Size is
634	>	always set from the dynamic information read from the database. It is unclear
635	>	why anyone would want to override this and set Size to false.
636	>
637	>	3. ibxscript: should now handle correctly a Case..End statement within a procedure
638	>	block.
639	>
640	>	4. IBDatabase: new property - CreateIfNotExists. If true and database does not
641	>	exist when an attempt is made to connect to it (run time only) then an attempt
642	>	is made to create the database.
643	>
644	>	5. IBDatabase: new event - OnCreateDatabase. This event is called after a database
645	>	has been successfully created as a result of a call to CreateDatabase or when
646	>	creating a database after it was found not to exist.
647	>
648	>	6.  DBControlGrid: a race condition could result in the wrong row image being
649	>	written to the cache. This has been avoided by a trip round the message
650	>	loop before rendering the row image.
651	>
652	>	7.  DBControlGrid: It is strongly recommended not to open the source DataSet for
653	>	a DBControlGrid during a Form's "OnShow" event handler. Under GTK2 this is
654	>	known to risk corrupt rendering of row images when the control is first
655	>	displayed. If necessary use "Application.QueueAsyncCall" to delay opening
656	>	of the dataset (see DBControlGrid examples) until the Form's Window has been created.
657	>
658	>	8.  DBControlGrid & IBDynamicGrid: Navigation keys should now work correctly with
659	>	a TDateEdit control located on an editor panel.
660	>
661	>	9.  TIBExtract: brought up-to-date plus many bug fixes.
662	>
663	>	10. DBControlGrid: Removed memory leak when updating rows.
664	>
665	>	11. TIBCMLocalDBSupport: fixed invalid free on upgrade.
666	>
667	>	IBX Change Log  version                                           (1.4-3) Thu, 22 Sep 2016 18:10:15 +0100
668	>
669	>	1. IBCustomDataset: When calling SetCodePage, no longer request transliteration
670	>	when target codepage is CP_NONE. This is a workaround for
671	>	http://bugs.freepascal.org/view.php?id=30622.
672	>
673	>	2. DBLog option removed from TIBStatisticalService - not supported by server
674	>	since Firebird 1.5.
675	>
676	>	3. ibxscript: An error is no longer generated for "on commit preserve rows" or
677	>	similar.
678	>
679	>	4. IBCodePage: updated mapping between codepages and character id.
680	>
681	>	5. ftWideString and ftWideMemo withdrawn. There is no UTF16 character set in
682	>	Firebird. Character sets with a char width of two are not UTF16.
683	>
684	>	6. Strings received from the database are now always transliterated into UTF8
685	>	regardless of the database character set or connection character set. This
686	>	is for compatibility with the LCL.
687	>
688	>	IBX Change Log  version  (1.4-2) Thu, 22 Sep 2016 15:25:27 +0100
689	>
690	>	1. IBBlob: Defer reading of blob until read method called. This avoids having to
691	>	read in an entire blob just to get the size of the blob. General performance
692	>	improvement when opening datasets containing blobs.
693	>
694	>	2. Clearing a  Blob now sets the corresponding field's modified flag.
695	>
696	>	3. IBLookupCombo: When not performing auto-complete, original query sort order
697	>	is now used.
698	>
699	>	4. IBDynamicGrid: Add OnSelectEditor event. Allows editor panel to be dynamically
700	>	determined.
701	>
702	>	5. IBDynamicGrid: Recompute column widths after dataset closed and re-opened.
703	>
704	>	6. IBLookupCombo: LazUTF8 added to uses clause to avoid compilation problems post
705	>	lazarus 1.6.0
706	>
707	>	7. IBControls. Removed "runtime" from list of paths to avoid "multiple packages"
708	>	compilation error.
709	>
710	>	IBX Change Log  version                                 (1.4-1) Tue, 17 May 2016 09:14:51 +0100
711	>
712	>	1. No character set specified for connection: when a text blob is retrieved, the
713	>	character set is determined by looking up the native character set using then
714	>	Firebird API. Otherwise a text mode blob is assumed to have the same character
715	>	set as the connection.
716	>
717	>	2. TIBGUIInterface: this is an internal interface. Minor type changes to allow
718	>	for Login Dialog returing a change to the database path.
719	>
720	>	3. Design Time Database and Server login Dialogs now allow the Database Name/Server Name
721	>	to be changed from that given in the TIBDatabase/TIBServer component and for the
722	>	entered value to be saved on a project specific basis (design time only).
723	>
724	>	4. IBDynamicGrid: TDBLookupCellEditor now compares its DataFieldName with the
725	>	column fieldname. If they are the same then it is acts as a look up for the KeyValue
726	>	Otherwise, it sets the column text to the selected ListField Value.
727	>
728	>	5. IBDynamicGrid: Only visible columns are now taken into account When recalculating
729	>	column width.
730	>
731	>	6. IBLookupComboEditBox: Fix error with autocomplete query when a RelationName is given
732	>	and a case insensitive search is requested.
733	>
734	>	7. IBDynamicGrid: No longer ignores notifications removing Column Totals controls
735	>	or column ListSource.
736	>
737	>	8. IBQuery: no longer performs unnecessary refresh of SQL Text (and hence avoids an
738	>	unprepare) when closing and the text has not changed.
739	>
740	>	9. IBSQL: Base the cursor name on a GUID instead of a hexstr version of the class pointer.
741	>	Less likely to cause a cursor re-use error on Windows.
742	>
743	>	10.SV5IPC: include workaround for OSX. FPC 3.0.0 has broken ipc module for darwin.
744	>	Expected to be fixed in 3.0.2. Hence workaround only applies to 3.0.0.
745	>
746	>	11. TIBTreeView: Guard against nil destination on record changed
747	>
748	>	12. AnsiString Code page support: TIBStringField.AsString and TIBMemoField.AsString now return a
749	>	string type with the code page set to reflect the returned field encoding after
750	>	Firebird driver transliteration, if any.  FPC 3.0.0 onwards only. Behaviour unchanged for
751	>	earlier versions.
752	>
753	>	13. AnsiString Code page support: Assigning to TIBStringField.AsString and TIBMemoField.AsString
754	>	will now result in transliteration to the code page specified for the Firebird driver
755	>	if the assigned string has a different code page. FPC 3.0.0 onwards only.
756	>
757	>	14. TIBDatabase: new property UseDefaultSystemCodePage. When set any lc_ctype parameter
758	>	is ignored and the lc_ctype value, when the database is opened, is set to align with
759	>	the DefaultSystemCodePage (FPC 3.0.0 onwards). Normally, this is what you want and should ensure
760	>	platform independence. Note: this applies to FPC 3.0.0 and earlier versions. Pre FPC
761	>	3.0.0, when this property is true, the lc_ctype is UTF8 except under windows when
762	>	the GETACP is used to determine the Windows code page.
763	>
764	>	15. TIBDatabase: new property DefaultCharSetName. This is the Firebird character set
765	>	name used as the lc_ctype when the database was opened. Only valid while the
766	>	Database is connected.
767	>
768	>	16. TIBDatabase: new property DefaultCodePage (FPC >=3.0.0 only). This is the codepage
769	>	id that corresponds to the DefaultCharSetName.
770	>
771	>	IBX Change Log  version                          (1.4-0) Mon, 15 Feb 2016 14:44:24 +0000
772	>
773	>	1. Unix: If Firebird Embedded Server shared object is loaded and a local database
774	>	path is given and database attach fails due to access permission issues on the
775	>	temp directory or security database, then the attach is retried with "localhost:"
776	>	prefixing the databasename. This should avoid problems when the database has to
777	>	be accessed by a local (e.g. classic) server and libfbembed is used.
778	>
779	>	2. Windows: revised search order for Firebird DLL:
780	>	i.   The Firebird Embedded Server in the application Directory.
781	>	ii.  If the FIREBIRD environment variable is set then the directory this
782	>	points to is searched for the FB Client DLL and then then underlying
783	>	"bin" directory.
784	>	iii. Registry Key HKEY_LOCAL_MACHINE\SOFTWARE\Firebird Project\Firebird Server\Instances
785	>	is used to locate the Firebird installation directory and the underlying
786	>	"bin" directory is searched for the FB Client DLL.
787	>	iv.  The Default installation directories C:\Program Files\Firebird\Firebird_2_x
788	>	are searched for the FB Client DLL.
789	>	v.   The PATH Environment variable is used to search for the FB Client DLL.
790	>	vi.  Finally the  PATH Environment variable is used to search for IBASE.DLL.
791	>
792	>	3. New Component: TIBXScript. This is an ISQL compatible SQL script execution engine.
793	>	See doc/readme.scriptengine and example applications.
794	>
795	>	4. New Component: TIBlocalDBSupport. This is a TIBDatabase support component intended to
796	>	simplify the use of the embedded firebird server on both Linux and Windows platforms.
797	>	See dpc/readme.localdatabase and example applications.
798	>
799	>	5. IBDynamicGrid: Reordering on column header click should now also work for
800	>	dynamic columns.
801	>
802	>	6. ISQLMonitor: (Windows only). Mutex added to TMultilockGate to avoid race condition
803	>	between incrementing/decrementing the lock count and signalling the event.
804	>
805	>	IBX Change Log  version           (1.3-2) Tue, 26 Jan 2016 14:39:54 +0000
806	>
807	>	1.3.2 was never formally released and only made available as beta copies.
808	>
809	>	1. DBControlGrid,IBDynamicGrid: Ignore down arrow and up arrow in TCustomMemo
810	>
811	>	2. IBDynamicGrid: Now deals correctly with a single column grid which has no indicator and autosize column
812	>
813	>	3. IBLookupComboEditBox: reset timer on each key press - avoids timer going off too early
814	>
815	>	4. IBDynamicGrid: Call event OnUpdateSortOrder even when aliasname not found in dataset
816	>	i.e. when it is a calculated field
817	>
818	>	5. IBDynamicGrid: Fix problem selecting a different row when expanded row at end of grid.
819	>	This problem was due to a race condition between recalculating row heights and
820	>	determining which row was selected by the mouse click. The row height calculation
821	>	is now deferred by an extra trip round the message loop allowing the row to
822	>	be always calculated on the current grid layout rather than risking it being
823	>	calculated on the grid layout after the expanded row has been shrunk.
824	>
825	>	6. IBLookupComboEditBox: avoid race condition between cm_killfocus and cm_exit on
826	>	Windows.
827	>
828	>	7. TIBStringField: Now has two new public properties: CharacterSetName: string and CharacterSetSize: integer;
829	>	These properties allow the (Firebird) character set name for the field and the max number of bytes per character
830	>	to be determined at runtime. See doc/readme.charactersets.html.
831	>
832	>	8. TIBWideStringField: This is a new field type with the same additional public properties as above and subclassed from
833	>	TWideStringField. This field type is used with the character size reported by Firebird is two. See doc/readme.charactersets.html.
834	>
835	>	9. TIBMemoField and TIBWideMemoField: new field types with the same additional public properties as above and subclassed from
836	>	TMemoField and TWideMemoField respectively. These field types are used with Blob subtype 1 and a characterset size of
837	>	1, 3 or 4 (TIBMemoField) or 2 (TIBWideMemoField). See doc/readme.charactersets.html.
838	>
839	>	Both also have a new published property "DisplayTextAsClassName". If false (default) the displaytext is generated
840	>	from the blob text by truncating the string to the displaywidth (in characters not bytes). A displaywidth of zero
841	>	implies no truncation.
842	>
843	>	10. IBLookupComboEditBox: Force autocomplete when EditingDone called and timer active.
844	>
845	>	11. IBDynamicGrid: Call DataSet.Append when entering edit mode and dataset empty and not in insert state
846	>	(avoids "Not in Edit Mode" error).
847	>
848	>	12. IBDynamicGrid: Correctly resize grid when one column width plus indicator.
849	>
850	>	13. IBDynamicGrid: Ensure Editor Panel has focus when shown - avoids Windows API calling
851	>	DBGrid.DoExit on subsequent mouse click (e.g. on child control such as a tabbed page control.
852	>
853	>	14. IBDynamicGrid: ignore up, down tab and return when editorpanel open and focus in a TCustomGrid descendent.
854	>
855	>	15. DBControlGrid: Stop flashing grid when dataset closed and then re-opened while DisabledControls
856	>
857	>	16. IBQuery: Bug fixed that prevented SQL being set programmatically once the Parser had been invoked.
858	>
859	>	17. IBCustomDataSet: On close, parser is now freed and Select SQL reverts to value before DataSet Opened.
860	>
861	>	IBX Change Log  version        (1.3-1) Sat, 18 Jul 2015 13:30:50 +0100
862	>
863	>	1.   OnCloseUp Event Handler added to TDBLookupProperties
864	>
865	>	2.   IBDynamicGrid: Call to OnEditorPanelHide is now last editor hide action - avoids
866	>	problem with row size when exception is called.
867	>
868	>	3.   IBLookupComboEditBox: Force pending autocomplete on combobox exit.
869	>
870	>	4.   IBDynamicGrid and DBControlGrid: Keyhandler now ignores up, down, escape and return keys if
871	>	in a TCustomComboBox and ignores return key if in a TCustomMemo
872	>
873	>	5.   IBLookupComboEditBox: Ensure that KeyValue is set correctly when full text
874	>	keyed in i.e. when autocomplete not performed
875	>
876	>	6.   Cleanup of "Uses" clauses and add console mode support. IBX should now support
877	>	console mode applications with all LCL required functions (builtin dialogs and
878	>	cursor management) centralised in the  IBDialogs unit. As long as "IBDialogs" is
879	>	not included in your project, IBX should compile and link with a console mode program.
880	>	See consolemode example and its "readme"for further guidence. DO NOT add the ibexpress package to a
881	>	console mode application or the IDE will automatically assume that your
882	>	application is GUI based. Instead, you should include the ibexpressconsolemode package.
883	>
884	>	IMPORTANT NOTE: IBDialogs must be included in GUI applications in order
885	>	to use the built in dialogs and cursor management. IBDialogs is
886	>	included by default if "ibexpress" is in your project source's "uses" clause.
887	>	This should be the case for all projects created through the IDE. This is why
888	>	you do not want to add the ibexpress package to console mode applications. The
889	>	ibexpressconsolemode package has been created to allow console mode programs
890	>	to avoid adding LCL dependencies when using IBX, while still having the
891	>	unit search paths set up correctly.
892	>
893	>	Existing users should check to ensure that the "ibexpress" unit is included in
894	>	each project's source file (*.lpr).
895	>
896	>	You may find that in order for the IDE to recognise that ibexpressconsolemode
897	>	exists, you have to first open the package in the IDE and then close it. This
898	>	adds it to the most recently accessed packages list. To make it permanently
899	>	available, add the package name to lazarus' staticpackages.inc file.
900	>
901	>	Thanks to Julio Jiménez for suggesting support of console mode.
902	>
903	>	7.   SQL Parser can now accept quoted strings that include new lines
904	>
905	>	8.   IBDynamicGrid: Lookup Cell Editor - the cursor is now positioned at end
906	>	of text on start of edit. This is particularly useful when tabbing to a
907	>	column and then inserting text.
908	>
909	>	9.   New Examples provided for IB Services and ISQLMonitor.
910	>
911	>	10. Fix error when writing to blob streams that recorded only the last buffer
912	>	write in the blob stream. In most cases, this did not cause a problem as the
913	>	IB Blob Stream is written in a single write. However, with the TDBImage, write
914	>	of a graphic type prefix was lost which caused a problem when the image could
915	>	not be automatically recognised.
916	>
917	>	11. Improve generation of random cursor names in TIBSQL - avoid risk of "cursor
918	>	already open" errors due to random numbers used for the cursor name being identical.
919	>
920	>	12. IBTable: corrected error that could result in an "Index out of bounds" error
921	>	when opening the table and the Primary Key is the last or only column in the
922	>	table. Thanks to Rick Hoover for the fix.
923	>
924	>	13. Fix TIBDatabase initialisation of lc_ctype under unix. Set to "UTF8" instead
925	>	of "UTF-8", and update list of available database character sets. Existing
926	>	users should check the current lc_ctype setting in their applications.
927	>
928	>	IBX Change Log  version  (1.2-4) Sat, 09 May 2015 12:38:29 +0100
929	>
930	>	1.  Firebird Services: avoid List Index error when opening a service with an
931	>	empty Params property.
932	>
933	>	2.  IBControls: Fix problem with new link mechanism introduced in 1.2.3.
934	>	Link now set up in Loaded method - avoids occasional failure to apply
935	>	SQL markup on initial open.
936	>
937	>	3.  "Employees" example performance improvements when scrolling.
938	>
939	>	4.  DBControlGrid: Correctly handle edit panel removal when panel is child control of a
940	>	TFrame. Force recaching of selected frame to avoid GTK race (results in a
941	>	random image cached).
942	>
943	>	5.  DBControlGrid: Should now react to changes in panel height at run time.
944	>
945	>	6.  IBDynamicGrid: Redraws rows below on panel editor hide - avoids blank space at end of grid
946	>	even when further rows exist.
947	>
948	>	7.  DBControlGrid: DefaultRowHeight is no longer a published property as it should
949	>	always be derived from panel height and setting this property can cause confusion.
950	>	Note for existing projects: to avoid a missing property error at run time,
951	>	each form using the DBControlGrid must be opened, updated and saved in the IDE
952	>	in order to remove the property value from the lfm.
953	>
954	>
955	>	IBX Change Log  version (1.2-3) Tue, 14 Apr 2015 14:11:17 +0100
956	>
957	>	1.  TIBStoredProc. Prepare now called by ParamByName to avoid need to always
958	>	call Prepare before setting parameter values.
959	>
960	>	2.  Error message on ParamByName (all cases) not found now includes name of missing parameter.
961	>
962	>	3.  Code tidyup and more robust handling of dsql information result vector.
963	>
964	>	4.  Support for centralised handling of transaction status changes. TIBTransaction
965	>	has been given additional events "AfterEdit", "AfterInsert", "AfterDelete", "AfterPost"
966	>	and "AfterExecQuery". The first three are called after the same event is called
967	>	for an IBCustomDataSet descendent using the Transaction. The fourth is called
968	>	after a call to TIBSQL.ExecQuery, again using this transaction. These new events
969	>	enable monitoring of transaction status changes for a given transaction to be
970	>	handled in a single place. For example, when a change to the dataset occurs
971	>	an indicator can be set that shows the user that in order to save changes,
972	>	the transaction should be committed.  Rather than doing this per dataset, this
973	>	can now be done per transaction.
974	>
975	>	5.  TDataSet.CheckBrowseMode automatically posts changes to the current row when
976	>	the dataset is scrolled. However, any changes to the current row are, by default,
977	>	discarded when the dataset is closed. TIBDataSet, TIBQuery and TIBTable now
978	>	have a new property "DataSetCloseAction" that adds automatic posting of changes
979	>	on dataset close. If this property is set to dcDiscardChanges (default) then the
980	>	behaviour is unchanged from previous versions. if the value is set to dcSaveChanges
981	>	then IBX will attempt to post any unsaved changes before the dataset is closed
982	>	(and after the BeforeClose event handler is called). The exception is when the
983	>	dataset is being closed as a result of a transaction rollback. In this case,
984	>	no action is taken and any unsaved  changes are discarded. This avoids both
985	>	unnecessary overhead and the risk that a validation error may occur in the Post
986	>	raising an exception and thereby preventing a rollback.
987	>
988	>	6.  String Field sizes and Display Widths should now be correct for multi-byte character sets.
989	>	In earlier versions, the Display Width was set to the maximum byte width rather than the character
990	>	width. Display Widths are now corrected by dividing by the max byte width per character.
991	>	For UTF8 character sets, the byte width is four and hence the Display Width will be
992	>	the byte width divided by 4. The byte width of each character set is determined
993	>	dynamically when the database connection is estabished from the RDB$CHARACTER_SETS
994	>	system table. (see also http://bugs.freepascal.org/view.php?id=27766).
995	>
996	>	7.  SQLParser will now correctly parse SQL Text which contains ':' within quoted string.
997	>
998	>	8.  IBLookupComboEditBox: List should now always be restored to full list when the
999	>	control loses focus. Default Key press default interval reduced to 200ms.
1000	>
1001	>	9.  DBControlGrid: Ensure that selection is changed to newly appended row, even
1002	>	when dataset rows are less than visible rows.
1003	>
1004	>	10. IBDynamicGrid: Editor Panel is not shown on indicator click if Datasource
1005	>	does not exist or DataSet is empty. More responsive on dataset open. New event
1006	>	OnRestorePosition. Column sort disabled if no header row.
1007	>
1008	>	11. IBTreeView: improved handling of response to "Add Node". Avoid scrolling dataset
1009	>	while dataset state is dsInsert. Avoids posting errors.
1010	>
1011	>	12. IBControls: New mechanism for distributing UpdateSQL and UpdateParams events. This is to
1012	>	avoid conflict with DisableControls/EnableControls with Master/Detail linked tables.
1013	>
1014	>	13. IBLookupComboEditBox: Now avoids SQL Errors when combo box text contains single quotes.
1015	>
1016	>	14. TIBDataSet and TIBQuery: new Event - OnValidatePost. This event has been introduced
1017	>	to solve a specific problem. That is when the dataset cursor is moved (e.g. by
1018	>	a grid mouse click and the current row is being edited or inserted. In this case, TDataset
1019	>	always "posts" the current record regardless or whether or not it may be more appropriate
1020	>	to cancel any changes; the post occurs before the "BeforeScroll" event fires due to the way the
1021	>	"MoveBy" function is implemented by TDataSet. The OnValidatePost event is called
1022	>	as the first action of the "Post" method and allows the handler to convert the Post
1023	>	into a Cancel if that is the appropriate action on moving to a different row. This is
1024	>	achieved by returning with "CancelPost" argument set to true. Note that an exception could be
1025	>	raised here, but it may still be more appropriate to validate a post and signal
1026	>	a problem in the "BeforePost" event handler. See readme.automaticposts.xhtml)
1027	>
1028	>	15. On Unix derived systems, the Firebird library name can now be given as a colon
1029	>	separated list. Each library name on the list is tried in turn, in left to right
1030	>	order with the first found being used as the firebird library. By default, on Linux,
1031	>	the library name list is 'libfbembed.so.2.5:libfbembed.so.2.1:libfbclient.so.2'. This can be
1032	>	overidden by the FBLIB environment variable or the OnGetLibraryName function.
1033	>
1034	>	Note: when using the libfbembed.so, if you prefix the database name with "localhost:"
1035	>	then it will still attempt to access the database via the Firebird Server and will
1036	>	require a username and password. If only the pathname is given, then the username
1037	>	and password should be omitted and the unix file permissions are used to grant
1038	>	access.
1039	>
1040	>	IBX Change Log  version  (1.2-2) Sat, 14 Mar 2015 11:35:04 +0000
1041	>
1042	>	1.  A new IBControl - TDBControlGrid has been added. TDBControlGrid a lookalike
1043	>	rather than a clone for the Delphi TDBCrtlGrid. TDBControlGrid is a single column grid
1044	>	that replicates a TWinControl - typically a TPanel or a TFrame in each row. Each row
1045	>	corresponds to a row of the linked DataSource. Any data aware control on the
1046	>	replicated (e.g.) TPanel will then appear to have the appropriate value for the row.
1047	>
1048	>	2. As suggested by Julio Jiménez, a new property "SQLHourGlass" has been added to TIBDatabase.
1049	>	When set to false (default true), the Hour Glass cursor is supcpressed and no cursor change
1050	>	takes place during database access. This may be useful when there are performance issues with
1051	>	the change of cursor. Setting the property to false suppresses the change of cursor.
1052	>
1053	>	3. As suggested by Julio Jiménez, a new property "AutoCommit" has been added to TIBDataSet, TIBQuery
1054	>	and TIBTable. When set to acCommitRetaining (Default: acDisabled), a call is made to
1055	>	Transaction.CommitRetaining immediately after every Post or Delete. This has the effect of
1056	>	making all changes permanent immediately rather than when the transaction is explicitly
1057	>	committed.
1058	>
1059	>	4. Experimental support for the Firebird 3 SQL_BOOLEAN type has been added while still
1060	>	using the legacy Firebird API. Thanks to Gabor Boros for helping to test this feature.
1061	>
1062	>	IBX Change Log  version      (1.2-1) Fri, 13 Mar 2015 11:14:15 +0000
1063	>
1064	>	Development version only.
1065	>
1066	>	IBX Change Log  version   (1.2-0) Thu, 26 Feb 2015 10:34:04 +0000
1067	>
1068	>	1. An internal select SQL Parser is now available for TIBCustomDataset descendents.
1069	>	This is typically used during an "OnBeforeOpen" event handler to manipulate the
1070	>	"Where" and "Having" clauses to implement user specified filters of arbitrary
1071	>	complexity.
1072	>
1073	>	2. A new Component Palette entry "Firebird Data Controls" is now available. This has
1074	>	three new data aware controls dependent on IBX and which make use of the SQL Parser.
1075	>	These are:
1076	>
1077	>	- TIBLookupComboEditBox
1078	>	- TIBDynamicGrid
1079	>	- TIBTreeview
1080	>
1081	>	TIBLookupComboEditBox is a TDBLookupComboBox descendent that implements "autocomplete"
1082	>	of typed in text and "autoinsert" of new entries. Autocomplete uses SQL manipulation
1083	>	to revise the available list and restrict it to items that are prefixed by the
1084	>	typed text (either case sensitive or case insensitive). Autoinsert allows a
1085	>	newly typed entry to be added to the list dataset and included in the available
1086	>	list items.
1087	>
1088	>	TIBDynamicGrid is a TDBGrid descendent that provides for:
1089	>	- automatic resizing of selected columns to fill the available row length
1090	>	- automatic positioning and sizing of a "totals" control, typically at the
1091	>	column footer, on a per column basis.
1092	>	- DataSet resorting on header row click, sorting the dataset by the selected column.
1093	>	A second click on the same header cell reversed the sort order.
1094	>	- Support for a "Panel Editor". That is on clicking the indicator column, the row
1095	>	is automatically expanded and a panel superimposed on it. The panel can have any
1096	>	number of child controls, typically data aware controls with the same datasource
1097	>	as the grid allowing for editing of additional fields and more complex editors.
1098	>	- Reselection of the same row following resorting.
1099	>	- A new cell editor that provides the same functionality as TIBLookupComboEditBox.
1100	>	Its properties are specified on a per column basis and allows for one or more
1101	>	columns to have their values selected from a list provided by a dataset.
1102	>	Autocomplete and autoinsert are also available. The existing picklist editor
1103	>	is unaffected by the extension.
1104	>
1105	>	TIBTreeView is a data aware TCustomTreeView.
1106	>
1107	>	3. When getting a field value using FieldByName.AsVariant, an SQL_INT64 with a
1108	>	zero scale will no longer return an error. An Int64 will be returned instead.
1109	>
1110	>	4. TIBTransaction now has events for Before and After Transaction End and a new function
1111	>	"GetEndAction" allowing the EndAction to be accessed by these event handlers.
1112	>
1113	>	5. TIBQuery can now handle correctly queries which contain the same keyword parameter
1114	>	repeated multiple times.
1115	>
1116	>	6. TIBUpdateSQL will no longer return an error when "RowsAffected" is <> 1. This error
1117	>	check used to get in the way of using Stored Procedures, and "Update or Insert"
1118	>	statements.
1119	>
1120	>	7. Insert, Modify and Delete property Editors now support Query Generation from
1121	>	Stored Procedures.
1122	>
1123	>	8. Three new examples illustrate the use of the new IB Controls
1124	>
1125	>
1126	>	IBX Change Log  version  (1.1-0) Mon, 07 Jul 2014 14:01:07 +0100
1127	>
1128	>	1. TIBXSQLVAR code clean up and optimisation to improve client side "prepare" and parameter
1129	>	setting performance. See "readme.field+param.names in the doc folder.(Thanks to
1130	>	Gabor Boros for reporting this problem and for testing the improvements).
1131	>
1132	>	2. IBX can now support dialect 3 quoted column names that contain spaces and which differ only in their case.
1133	>	See readme.field+param.names in the doc folder.
1134	>
1135	>	3. IBX SQL Editors will now automatically add double quotes around column names when the database
1136	>	dialect is "3" and the column name contains spaces or is a Firebird 2.5 SQL Reserved Word.
1137	>
1138	>	4. Param Type LargeInt now supported in TIBQuery and TIBStoredProc
1139	>
1140	>	5. TIBSQL.ExecQuery retry on failure removed to avoid problems with "at most once"
1141	>	actions.
1142	>
1143	>	6. TIBTransaction.SetDefaultDatabase uses SetObjectProp instead of mis-using SetOrdProp (with
1144	>	thanks to Yuriy Kopnin for pointing this out).
1145	>
1146	>	7. GenerateParamName is now a published property of TIBSQL, TIBQuery and TIBDataSet.
1147	>
1148	>	8. varWord, varShortInt and varInt64 added to TIBXSQLVAR.SetAsVariant and hence now available as variant types
1149	>	for both fields and parameter setting.
1150	>
1151	>	9. Changes to the Select SQL in an IBCustomDataset descendent should now be
1152	>	visible in the Fields Editor immediately afterwards - rather than only after cycling the "active" property.
1153	>
1154	>	10. TIBSQL SQL editor will operate correctly and not report an SQL syntax error on SQL test,
1155	>	when DSQL ('?') parameter placeholders are used and the TIBSQL.GenerateParamNames property is set to true.
1156	>
1157	>	11. TIBTable now has a property editor for "MasterFields"
1158	>
1159	>	12. SQL Property Editors now include a checkbox "Allow DSQL Placeholder". This corresponds to the
1160	>	GenerateParamNames property and should be set when using DSQL (i.e. '?') style parameters.
1161	>
1162	>	13. The IBTransaction editor now has a radio button ("Unspecified") which is set when the combination
1163	>	of settings is unrecognised. Selecting this radio button has no effect on the settings.
1164	>
1165	>
1166	>	IBX Change Log  version                 (1.0-5) Sat, 28 Dec 2013 19:22:23 +0000
1167	>
1168	>	1. TBookmark change conditional compile changed to >= 2.7.0 to match revised availability of change.
1169	>
1170	>	IBX Change Log  version          (1.0-4) Thu, 28 Feb 2013 16:56:13 +0000
1171	>
1172	>	1. In a TIBCustomDataset descendent, a generator now only sets the value when
1173	>	it is null. This allows for alternative user defined setting of the generator
1174	>
1175	>	Many thanks to Julio Jiménez for this fix
1176	>
1177	>	2. An Error Dialog is now displayed in the Lazarus IDE if IBX cannot find the Firebird Library
1178	>	and suggests that the user may have forgotten to install it.
1179	>
1180	>	IBX Change Log  version         (1.0-3) Thu, 22 Nov 2012 22:53:39 +0000
1181	>
1182	>	1. Conditional compilation used to limit registration of TIntegerField to
1183	>	Lazarus versions less than 1.1
1184	>
1185	>	2. When a database connection is created, character set is now by default set
1186	>	to UTF8 (Unix) or to the current Windows code page (Windows) if in the range
1187	>	1250 to 1254.
1188	>
1189	>
1190	>	IBX Change Log  version     (1.0-2) Tue, 09 Oct 2012 09:10:30 +0100
1191	>
1192	>	1. TBookmark change conditional compile changed to > 2.6.2 to match expected availability of change.
1193	>
1194	>
1195	>	IBX Change Log  version    (1.0-1) Sun, 05 Aug 2012 20:00:04 +0100
1196
1197		1. In IBCustomDataset. Changed CurBookmark from string to TBookmark for compiler versions > 2.6.0
1198		Necessary because of TBookmark type and TDataSet.Bookmark property change in fpc 2.7.1

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