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Revision 311 by tony, Mon Aug 24 09:32:58 2020 UTC

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1	<	IBX Change Log  version                                     (1.4-2) Sat, 16 Jul 2016 13:25:48 +0100
1	>	IBX Change Log  version (2.3-5 Build 12341) Mon, 24 Aug 2020 10:23:35 +0100
2	>
3	>	1.  TIBStringField: when a string value is read from a dataset buffer, if the
4	>	number of UTF8 characters exceeds the string size then string is truncated
5	>	to the maximum string size. This is  usually a problem with fixed width columns
6	>	right padded with white space.
7	>
8	>	2.  SQLFiltered and SQLFilterParams added to TIBQuery, TIBTable and TIBDataset.
9	>	If SQLFiltered is set then when a dataset is opened, each line in the
10	>	SQLFilterParams property is assumed to be a SQL condition clause and
11	>	ANDed into the Where clause of the SQL Select statement provided as a
12	>	dataset property. Each such SQL condition thus acts as an additional filter
13	>	on the dataset. (Not yet tested)
14	>
15	>	3.  The Filtered property inherited from TDataset is no longer used for SQL (server
16	>	side filters).
17	>
18	>	4. IBLookupComboEditBox: Selection should no longer reset to start of text when
19	>	text matches complete entry.
20	>
21	>	5. TIBDataLink: Detail Dataset params not refreshed unless both master and detail
22	>	dataset are active (avoids risk of access violation if master is inactive)
23	>
24	>	6. TIBEvents: Registered property can now be set at design time even if database not open
25	>
26	>	7. TIBEvents: component now correctly re-initialised after call to UnregisterEvents.
27	>	This should prevent "spillover" of events between sessions.
28	>
29	>	8. TIBCustomDataset: GetNextRecord now called when reseting to first record of a unidirectional dataset.
30	>	This should ensure that the internal buffer is set up correctly and avoids
31	>	a duplicate initial row.
32	>
33	>	9. TIBStringField: DataSize now given as byte size of string less trailing any zero character.
34	>	That is, the DataSize should be the field size * character set width. The
35	>	value returned by DataSize is now the same as the Dataset buffer size reserved
36	>	for the field.
37	>
38	>	10. IBExtact: Tidyup of SQL generation. Avoid unnecessary double quotes.
39	>
40	>	11. TIBCustomDataset: Add checks on buffer sizes when copying data from row to field buffer
41	>	and vice-versa. This may result in an exception being raised (correctly) for
42	>	older programs when using dataset fields added to a form and the database has been
43	>	upgraded. For example, computed fields can change from 32-bit to 64-bit integers.
44	>	In such cases, the field needs to be deleted in the IDE fields editor and then
45	>	added back in.
46	>
47	>	12. IBCustomDataset: Blob data is now cleared when TDataSet.Cancel is called. This
48	>	should ensure that (e.g.) a TDBMemo is correctly refreshed after a dataset edit
49	>	is cancelled.
50	>
51	>	IBX Change Log  version (2.3-4 Build 12041) Fri, 17 Apr 2020 14:00:32 +0100
52	>
53	>	1.  TIBXDataSet and Generators: Generator Names that are not all upper case or
54	>	not SQL Identifiers are now supported.
55	>
56	>	2.  TIBXScript: Set Generator is no longer rejected as unrecognised SQL and is
57	>	passed to the Firebird engine for execution.
58	>
59	>	3.  TIBDataSet: Unidirectional datasets now give an error message if an attempt
60	>	is made to scroll back.
61	>
62	>	4.  New unit: IBMessages.pas. Contains only messages used by IBX and not FBIntf
63	>
64	>	5. TIBLookupComboEditBox: When generating auto-complete SQL, the ListField is now
65	>	only enclosed in double quotes in SQL dialect 3 and when it needs to be.
66	>
67	>	6. TIBLookupComboEditBox: when the list source opens, the ListField name is now
68	>	validated. If no match is found in the list of field names and the database has
69	>	been opened in SQL Dialect 3, then the ListField Name is converted to upper case
70	>	if it then matches a field name. Otherwise, a Listfield not valid exception occurs.
71	>
72	>	7. IBGeneratoreditor.pas: Add missing parenthesis around "IS" statement for compliance
73	>	with fpc 3.2.
74	>
75	>	IBX Change Log  version (2.3-3 Build 11512) Fri, 28 Dec 2018 10:04:17 +0000
76	>
77	>
78	>	1. New property for TIBDatabase and TIBXServicesConnection. This is "ConfigOverrides"
79	>	and is used to override the default settings in the client side "firebird.conf" This
80	>	includes "WireCompression" and "WireCrypt". The value of this property is a "TStrings".
81	>	Each line of the string list should be a setting in the same format as "firebird.conf".
82	>	For example "WireCompression = true" in order to request wire compression on the client side.
83	>
84	>	Note: explicit settings in the client side "firebird.conf" appear to take precedence
85	>	over settings given in TIBDatabase and TIBXServicesConnection. Many client side settings
86	>	also require a compatible setting in the server side "firebird.conf". For example
87	>	"WireCompression = true" must also be set in the server's "firebird.conf" for wire
88	>	compression to be used.
89	>
90	>	Whether or not WireCompression or WireCrypt are in use can be checked using the information
91	>	returned with the Client/Server protocol version. See ibx/examples/dbadmin and
92	>	ibx/examples/dbinfo for examples of how to display this information.
93	>
94	>	2. New property for TIBDatabase and TIBXServicesConnection: "WireCompression". This
95	>	is a "convenience" property. If set the "WireCompression=true" is added to the
96	>	ConfigOverrides. If unchecked then this setting is removed.
97	>
98	>	3. TIBExtract: 64-bit integer types are now correctly extracted as "BIGINT" and
99	>	not "INT64".
100	>
101	>	4. New published properties for TIBCSVDataOut, TIBInsertStmtsOut and TIBBlockFormatOut
102	>	These are:
103	>	property TimestampFormat: string;
104	>	property DateFormat: string;
105	>	property TimeFormat: string;
106	>
107	>	Respectively, these provide the date time format templates for SQL types: TIMESTAMP,
108	>	DATETIME and TIME. The format strings use the standard FPC date/time format
109	>	characters (see https://www.freepascal.org/docs-html/rtl/sysutils/formatchars.html).
110	>
111	>	If any of the above properties are set to an empty string, then the locale default
112	>	is used. This uses the ShortDateFormat and the LongTimeFormat. In timestamp, the
113	>	locale default is extended by appending '.zzz' to include milliseconds.
114	>
115	>	TIBCSVDataOut by default sets these properties to the empty string, while the other
116	>	two use: 'yyyy.mm.dd hh:nn:ss.zzz', 'yyyy.mm.dd' and 'hh:nn:ss.zzz' respectively.
117	>
118	>	5. New published property for TIBCSVDataOut:
119	>	property QuoteStrings: boolean (default true)
120	>
121	>	If false then strings are unquoted, otherwise, the QuoteChar property value is
122	>	used to delimit each and every string in the output.
123	>
124	>	6. New published properties for TIBCSVDataOut:
125	>	property FieldSeparator: string;
126	>	property HeaderSeparator: string;
127	>
128	>	Respectively, these provide the separator character(s) used to separate fields
129	>	in data and header rows. Both default to ','.
130	>
131	>	7. New published properties for TIBCSVDataOut and TIBBlockFormatOut:
132	>	TOnFormatTextString = procedure(sender: TObject; var TextString: string) of object;
133	>	property OnFormatTextString;
134	>
135	>	This event handler can be used to process text strings before they are included
136	>	in the output e.g. to replace unprintable characters with alternative strings.
137	>	This only applies to columns with an SQL Type of SQL_VARYING and SQL_TEXT.
138	>
139	>	8. TIBDataSet now raises an exception when ParamByName called with an invalid parameter name.
140	>	Uses "FindParam" if in order to find out if a parameter with a given name exists
141	>	and without raising and exception if it does not.
142	>
143	>	9. TIBQuery now uses IBX SQL Parser instead of the TParams SQL parser in order to ensure
144	>	consistency with SQL queries.
145	>
146	>	10. CaseSensitiveParameterNames property added to TIBSQL, TIBDataSet and TIBQuery.
147	>	When true, SQL statement parameter names are parsed case sensitive. Note for
148	>	TIBDataSet only applies to Select query.
149	>
150	>	11. IBEvents: removing a TIBEvent component from a form should no longer result in
151	>	an IDE exception.
152	>
153	>	12. LocalDBSupport: initial database creation should now work correctly
154	>	when the schema source is an sql file.
155	>
156	>	13. TIBCMLocalDBSupport: new event handler "property OnProgressEvent: TOnProgressEvent"
157	>	when defined, this handler will be called by the internal TIBXScript during
158	>	initial database creation when the schema source is an sql file and may be used
159	>	to provide a visual indication of progress in console mode.
160	>
161	>	14. TCustomIBLocalDBSupport: new public property "InOnCreateDB: boolean". This is set
162	>	to true while a new local database is being created and its schema populated.
163	>	Useful in (e.g.) TIBDatabase.OnAfterConnect handler to suppress actions
164	>	when the database is disconnected/connected during the create DB procedure.
165	>
166	>	15. TIBXScript: any User/password parameters found in a CREATE DATABASE statement
167	>	are now always ignored and replaced by the user name and password provided as
168	>	the login parameters for the TIBDatabase referenced from the TIBXScript. The
169	>	IgnoreCreateDatabase property still applies and the CREATE DATABASE statement is
170	>	completely ignored if this property is true.
171	>
172	>	16. Code tidyup in IBTreeView: Node properties initialisation moved from TIBTreeView.AddNodes
173	>	to TIBTreeView.Added. An OnAddition event handler is no longer needed to initialise
174	>	ImageIndex and SelectImageIndex values on AddNode.
175	>
176	>	17. TIBDatabase.Attachment and TIBXServicesConnection.ServicesIntf properties are now
177	>	read/write. This should enabled (e.g.) multiple instances of TIBDatabase to share
178	>	the same database connection.
179	>
180	>	18. TIBDataSet and TIBQuery now support the TDataSet "Filter" property.
181	>	if provided, this should be an conditional SQL expression suitable for
182	>	including in an SQL Select statement "where" clause. If non-empty and the
183	>	"Filtered" property is true then the SQL expression provided as the value of
184	>	the "Filter" property is "ANDed" with any existing condition statement
185	>	in the SQL statement's "Where" clause.
186	>
187	>	If the "Filter" property is set at run time, the "Filtered" property is true
188	>	and the dataset is already open, then the dataset is closed and re-opened automatically.
189	>
190	>	The "Filter" condition may include IBX style parameters. In which case, their
191	>	value must be set by the dataset's "OnBeforeOpen" event handler.
192	>
193	>	This is a public property for TIBDataSet and TIBQuery query and intended for
194	>	use at run time.
195	>
196	>	Note: The property is a published property of TIBTable. The TIBTable functionality
197	>	is unaffected by this change.
198	>
199	>	IBX Change Log  version (2.3-2) Wed, 05 Dec 2018 12:19:23 +0000
200	>
201	>	1. Remove need to check for IsMultiThread by providing access to GUI timers via
202	>	IBGUIInterface. Note: master/detail delay timer does not apply to console
203	>	mode apps.
204	>
205	>	2. TIBCustomDataSet: SQLParser ignored if it does not contain a valid select
206	>	statement. This avoids problems if "Execute Block" is used as the Query.
207	>
208	>	3. IBSQLParser now uses the common SQL tokeniser from fbintf. This replaces the
209	>	internal SQL tokeniser routines.
210	>
211	>	4. IBSQLParser: new property NotaSelectStmt. Set to true if SQL fails to parse
212	>	as a select statement, with or without CTEs.
213	>
214	>	5. IBSQLParser: parser now recognises the "ROWS" clause.
215	>
216	>	6. TIBXScript now uses the common SQL tokeniser from fbintf. This replaces the
217	>	internal SQL tokeniser routines.
218	>
219	>	7.  Fix error in TIBXScript processing of "set" statements. This avoids exceptions
220	>	being raised for valid set statements processed by a data formatter.
221	>
222	>	8. New published property for TIBDatabase and TIBXServicesConnection. This is
223	>	FirebirdLibraryPathName: string. If not empty it is used to explicitly specify
224	>	the path of the Firebird Library used by the database/services connection.
225	>
226	>	9. New read only public property for TIBDatabase and TIBXServicesConnection. This
227	>	is FirebirdAPI and returns the IFirebirdAPI interface used by the database/
228	>	services connection.
229	>
230	>	10.SQL Property editors now quote parameter names if "Quote identifier" is selected
231	>	or param name is not a valid SQL identifier.
232	>
233	>	11. IBLookupComboEditBox: In Lazarus 2.0, TDBLookupComboBox takes a more restrictive
234	>	view of whether the text box should be editable when no DataSource is specified.
235	>	TIBLookupComboEditBox has been updated to workaround this problem. As long as
236	>	ReadOnly is false, the text box is editable when no DataSource is specified.
237	>
238	>	12. AllowUseOfFBLIB is now set to "true" at design time. This is to allow use of
239	>	the FBLIB environment variable. If you do not want to permit this then you
240	>	must modify the Register procedure in the design/IBDBReg.pas unit to remove
241	>	this setting.
242	>
243	>	IBX Change Log  version                 (2.3-1) Thu, 25 Oct 2018 14:39:45 +0100
244	>
245	>	1. IBCustomDataset: replace deprecated function ValidUTF8String with call to
246	>	Utf8EscapeControlChars
247	>
248	>	IBX Change Log  version                (2.3-0) Mon, 16 Apr 2018 09:48:06 +0100
249	>
250	>	IMPORTANT: the source code tree has been re-organised for IBX 2.3. Please remove
251	>	all previous copies of the IBX source code tree before installing this release.
252	>
253	>	The IBX packages used by most users have not changed, with one exception. The
254	>	IBServices unit has been moved to the package iblegacyServices.lpk. To continue
255	>	to use the IBServices unit in your applications, please add the iblegacyServices
256	>	to the list of dependencies. To do this, open the Project Inspector and select
257	>	Add->New Requirement and select "ibLegacyServices" from the list of available
258	>	packages.
259	>
260	>	1. New unit IBXServices. The IBXServices unit is a re-architectured update of
261	>	the IBServices unit providing what is intended to be a clearer and easier to
262	>	use set of IB Services components. See Chapter 10 of the IBX User Guide for
263	>	more information and the guide to "Firebird Service Management Using IBX".
264	>	As indicated above, the legacy services components are still available and
265	>	provided in a separate package. There is no need to update working applications
266	>	using the older versions except for an additional package dependency.
267	>
268	>	2. The IBX packages and source code tree have been re-organised in an attempt to
269	>	finally get rid of the "duplicate ppu" warnings. This re-organisation should
270	>	not affect existing users. Section 2.3 of the IBX User Guide describes the
271	>	new set of IBX packages.
272	>
273	>	3. The ibx/examples/DBAdmin and the ibx/examples/services example have been
274	>	updated to use the new Services API components.
275	>
276	>	4. The iblocal package has been updated to use the new Services API components.
277	>
278	>	5. procedure SetAutoAdmin; in the new IBX Services this method is now a member of
279	>	TIBXSecurityService. It had been wrongly classified in the previous version
280	>	as a per database configuration item. It is global to a server and hence
281	>	correctly positioned as part of the Security Package. In the DBAdmin example,
282	>	the setting has moved to the mappings page.
283	>
284	>	6. TIBXScript: IgnoreCreateDatabase added. If true then CREATE DATABASE statements
285	>	are ignored.
286	>
287	>	7. TIBDatabase: DropDatabase now ensures that all transactions have been properly
288	>	closed before the database is dropped. Before and After Disconnect event handlers
289	>	are also fired.
290	>
291	>	8. TIBTransaction: OnStartTransaction event now fires every time the transaction
292	>	is started and not just the first time.
293	>
294	>	9. IBDataOutput: Use FormatFloat for all performance statistics to avoid platform
295	>	depenendency with comp type.
296	>
297	>	10. IBDataOutput: select query data output is now sent to stdout instead of stderr.
298	>
299	>	11. TIBDatabase: Remove regression. If a user login dialog changes the DatabaseName
300	>	then this is recognised and not ignored.
301	>
302	>	12. TIBDataSet, TIBQuery, TIBTable: additions:
303	>	function GetRowsAffected(var SelectCount, InsertCount, UpdateCount, DeleteCount: integer): boolean;
304	>	function GetPerfStatistics(var stats: TPerfCounters): boolean;
305	>	property EnableStatistics: boolean read FEnableStatistics write SetEnableStatistics;
306	>
307	>	GetRowsAffected returns the affected row counts from the last insert/update/delete
308	>	if EnableStatistics = true then GetPerfStatistics returns the current stats
309	>	counters for the select query. Note: stats accumulate after each fetch from
310	>	the database. To get total query cost after open, call the "Last" method
311	>	and then GetPerfStatistics.
312	>
313	>	See ibx/examples/consolemode for an example of the use of GetPerfStatistics
314	>
315	>	13. TIBExtract: Identity columns DDL. "Start with clause" now correctly encapsulated
316	>	in parenthesises.
317	>
318	>	14. TIBExtract: new published property "AlwaysQuoteIdentifiers". If true then in dialect 3
319	>	SQL identifiers are always delimited by double quotes. If false, then they are
320	>	only delimited if the identifier is a reserved word, contains lower case or special
321	>	characters. Set this property to true to retain previous behaviour.
322	>
323	>	15. Insert SQL Property Editor. In Insert Returning Clause, Identity column names
324	>	are now inserted in double quotes if not Reserved Words or valid SQL Identifiers.
325	>
326	>	16. TIBDataSet, TIBQuery, TIBTable: addition:
327	>	property MasterDetailDelay: integer {defaults to zero}
328	>
329	>	When non-zero and the dataset is a detail table referencing a master table
330	>	through either a MasterSource (TIBTable) or a DataSource (TIBDataSet, TIBQuery)
331	>	then a synchronisation delay is added (in milliseconds) between the master
332	>	row changing and the detail dataset being re-opened. If the master dataset
333	>	is scrolled before the delay expires then the delay is reset. This can be used
334	>	to avoid performance overheads when scrolling through a large master dataset.
335	>
336	>	Note: uses fptimer and hence requires a thread manager. Under Linux the
337	>	chreads unit must be included in your project. TTimer is not used in order
338	>	to avoid an LCL dependency. Requires FPC 3.0.2 or later.
339	>
340	>	17. TIBExtract: User role grants now excluded when etGrantsToUser not specified
341	>	with Extract Option eoDatabase.
342	>
343	>	18. TIBLookupComboEditBox: Workaround added for https://bugs.freepascal.org/view.php?id=33428
344	>	When a deLayoutChanged event is reported on the ListSource dataset, the
345	>	combobox text is updated. This allows a listsource (detail) to be in a Master/Detail
346	>	relationship with the control's datasource (master).
347	>
348	>	19. TIBExtract: Full BigInt value range now supported for Generators/Sequences.
349	>
350	>	20. TIBExtract: Select Procedures (Procedure type 1) now include "SUSPEND;" clause in their
351	>	stubs. Pedantic fix really, as procedures output in dependency order anyway.
352	>
353	>	21. TIBExtract: Package Headers and Package Bodies are now included in the extracted
354	>	DDL (Firebird 3 and later only).
355	>
356	>	22. TIBLookupComboBox Autocomplete Fixes:
357	>	i. Only appended text is now selected after autocomplete.
358	>	ii. Uppercase keys no longer ignored for autocomplete.
359	>	iii. Retain Prefix case is now honoured correctly.
360	>	iv. When a DataSource is assigned, typing after autocomplete now extends prefix
361	>	before autocomplete performed. i.e. behaviour now the same as when
362	>	no DataSource assigned.
363	>
364	>	23. TIBXScript: Single Line Comments starting with '--' are now ignored when occurring
365	>	between SQL statements.
366	>
367	>	24. TIBExtract: New published property CaseSensitiveObjectNames. If false (default) then
368	>	ObjectNames are converted to upper case before matching against metadata object
369	>	names, unless the objectname is delimited by double quotes, in which case, the
370	>	double quotes are removed and the remaining string is used (unmodified) to match
371	>	against the metadata object name.
372	>
373	>	If true then the ObjectName is used as is without modification and matched
374	>	against the metadata object name. No attempt is made to remove double quotes.
375	>
376	>	25. TIBExtract: New Extract Types: etDatabaseTriggers and etDDLTriggers. When used
377	>	with eoTrigger, these extract types can be used to select only Database Triggers,
378	>	or DDL Triggers or both. Ignored when etTable or etTrigger included in Extract Types.
379	>
380	>	26. TIBXScript: If an exception occurs during the processing of a statement, the
381	>	statement separate character is now reset to the default (';').
382	>
383	>	27. TIBDatabase: Reconnect method added and used by TIBXScript for reconnect.
384	>
385	>	28. TIBXScript: Transaction is no longer automatically reactivated immediately processing
386	>	a commit or reconnect statement and instead activated only when next SQL statement
387	>	is executed.
388	>
389	>	29. TIBSQL.HasField should no longer generate and exception when the field does not exist.
390	>
391	>	30. TIBXScript: case insensitive regex now used when matching statements instead of
392	>	converting statement to upper case.
393	>
394	>	31. TIBExtract: metadata comments now supported. New published property
395	>	IncludeMetaDataComments (default true). If true then metadata comments included
396	>	in extracted DDL. New Extract Object member eoComments. This may be used with
397	>	ExtractObject method to list all metadata comments.
398	>
399	>	32. TIBExtract: ListObjectNames method added.
400	>
401	>	33. Updated Database component editor to support additional connection string
402	>	types.
403	>
404	>	IBX Change Log  version  (2.2-0) Wed, 28 Feb 2018 10:57:45 +0000
405	>
406	>	NOTE: THE LOCATIONS OF SOME OF THE UNIT DIRECTORIES HAS CHANGED FROM IBX 2.1. THIS IS TO
407	>	AVOID DUPLICATE PPU WARNINGS. PLEASE REMOVE EARLIER VERSIONS OF IBX BEFORE INSTALLING THIS
408	>	RELEASE.
409	>
410	>	NOTE: THE DBADMIN DEMO REQUIRES THAT THE MemDSLaz PACKAGE IS INSTALLED IN THE LAZARUS IDE.
411	>
412	>	1. IBExtract: Identity columns - add additional check for null column for generator name.
413	>
414	>	2. IBCustomDataSet: Insert and Modify (Update) queries now recognise and process SQL RETURNING clauses.
415	>	The main use for this is for Firebird 3 Identity columns (see IBXDocumentation 6.6.8 for further
416	>	information). However, this is also a very useful mechanism for returning updated computed by
417	>	column values. Values returned as a result of executing an Insert or Update statement
418	>	replace existing values in the current row for each corresponding column.
419	>
420	>	Previously, if a dataset's select query included read only (computed by) fields then
421	>	an automatic row refresh was performed after an insert or update query had been processed,
422	>	irrespective of the setting of the "ForcedUpdates" property. This has changed such
423	>	that an automatic refresh is no longer performed if an insert or update query contains
424	>	a returning clause that updates one or more fields on the current row. A full row
425	>	refresh is only performed if (a) ForcedRefresh is true or (b) the query does not return any
426	>	field values and the select query contains read only fields. Use of Insert/update
427	>	returning should be significantly more efficient than executing a refresh query.
428	>
429	>	This behaviour change is intended to be backwards compatible and there should be no need to change
430	>	existing programs, other than to improve performance by using the new capability.
431	>
432	>	3. IBCustomDataSet: DELETE...RETURNING queries are now also recognised. However, as
433	>	they are called when the dataset row is being deleted, there is no value in
434	>	updating the current record from the query result. Instead, a new event handler
435	>	"OnDeleteReturning" is provided. If a DELETE...RETURNING query is execute and
436	>	an OnDeleteReturning event handler is provided then it is called with the IResults returned
437	>	by the query. The event handler can then interrogate the query results and
438	>	perform whatever action is necessary. For example to confirm, to the user,
439	>	the deletion of a row with the returned values.
440	>
441	>	4. TIBTable: generated Insert and Update SQL now include a RETURNING clause for
442	>	any Computed By or Identity Columns. The IBTables example has been updated to
443	>	illustrate the computation of the employee Full Name on update.
444	>
445	>	5. TIBTable: The GeneratorField property is now published.
446	>
447	>	6. The InsertSQL property editor now shows Firebird 3 Identity columns separate from the Field List.
448	>	When InsertSQL is generated, the Identity columns are not included in the list of values to
449	>	be inserted. A RETURNING clause is added to the insert statement to return the value of
450	>	each Identity column after the insert is executed.
451	>
452	>	7. The Modify Property Editor now generates Update SQL with Computed By fields in Update..Returning clause.
453	>	Similarly Insert Property Editor now generates Insert SQL with Computed By fields in
454	>	Insert..Returning clause.
455	>
456	>	8. TIBGenerator: small performance improvement by not preparing query each time
457	>	a new value is generated.
458	>
459	>	9. TIBSQL: Free resources when transaction changed - ensures new transaction is used.
460	>
461	>	10. Property editors will now sync table name to a System Table when "Include System
462	>	Tables" is selected and the query is for a System Table.
463	>
464	>	11. Minor Performance improvement to handling of Date/Time types in IBX datasets. Field
465	>	values are no longer converted to milliseconds from TDateTime and then back again
466	>	to TDateTime (the conversion to milliseconds is the default TDataset approach).
467	>
468	>	12. Property Editors handling of Stored Procedures.
469	>	* Select and Refresh: only show a list of stored procedures that return multiple rows (proc type 1) and
470	>	which have a non-empty list of output parameters (i.e. stored procedures that may be used in a select
471	>	query).
472	>	* Modify and Insert: only show a list of stored procedures that return at most a singleton row (proc type 2).
473	>
474	>	13. IBStoredProc: Now supports Firebird 3 Package Names. A new published property PackageName
475	>	can be used to select a package. If non-empty, the stored procedure name is
476	>	expected to be a stored procedure defined in the specified package and the
477	>	generated SQL will be as required for a stored procedure located in a package.
478	>
479	>	14. Select, Refresh, Insert, Modify, Delete and TIBSQL SQL Property Editors now include
480	>	a "Package Name" drop down box to allow selection of a Firebird 3 Package from
481	>	which a stored procedure can be selected. With no package name selected, non-package
482	>	stored procedures are listed.
483	>
484	>	15. TIBXScript: turn off database login prompt when reconnecting - this avoids prompting
485	>	for password on reconnect.
486	>
487	>	16. TIBDatabase: use IAttachment for connection default character set id, code page
488	>	and character set name.
489	>
490	>	17. TIBDatabaseInfo: cache ODS Version information on first request in order to minimise
491	>	DB info lookups"
492	>
493	>	18. IBExtract: now supports DDL Triggers and Grants to DDL objects.
494	>
495	>	19. Add a property Editor for TIBUpdate.RefreshSQL.
496	>
497	>	20. IBUpdate: Ignore non-data (e.g. calculated) fields when assembling list of input
498	>	parameters. This stops an exception being raised when the field cannot be
499	>	located in the record buffer.
500	>
501	>	21. Property Editors now automatically include System Tables when opened and when the query table
502	>	is a System Table.
503	>
504	>	22. IBServices: SQRB and SRB buffers are now reset when service query throws an exception.
505	>	This avoids errors due to a stale SQRB or SRB being used for the next query.
506	>
507	>	23. IBServices: Service attach parameters now include "expected_db". This is used to
508	>	add the SPB item isc_spb_expected_db. This names a database using
509	>	an alternative Security Database (FB3 onwards) and allows (e.g. backup/restore) using such a
510	>	database. examples/services re-written to illustrate use of "expected_db".
511	>
512	>	24. IBServices: TIBControlAndQueryService.WriteNextChunk no longer ignores isc_info_svc_timeout.
513	>	This avoids truncated backups when the server returns a timeout (busy) response.
514	>
515	>	25. TIBDatabase: isc_dpb_page_size now supported as a database parameter when using TIBDatabase.CreateDatabase.
516	>
517	>	26. TIBDatabase: DatabaseName property may now be prefixed by $TEMP$ or $DATADIR$ for local
518	>	databasenames. These are respectively expanded to the local system's temp directory
519	>	(including trailing delimiter) or to a prescribed data directory (including
520	>	trailing delimiter). Under Unix systems the data directory is a hidden directory
521	>	in the user's home directory. The hidden directory name is either the string returned
522	>	from the SysUtils "Vendor Name" or "IBX" if empty. In either case prefixed by a '.'.
523	>	Under Windows, the directory is the same as the Data Directory as decribed
524	>	above but instead prefixed by the User's application data path. These may be
525	>	used to improve application portability for Personal Databases.
526	>
527	>	27. TIBTable: FieldDefs property is no longer published. Due to the use of TIBFieldDef
528	>	this has not worked for a long time and is not useful either. FieldDefs should be
529	>	managed using the Fields Editor as with any other dataset. To access the fields
530	>	editor for a TIBTable component, double click on the component. The fields editor
531	>	is then displayed.
532	>
533	>	28. TIBDatabaseInfo: new properties/function
534	>	* DateDBCreated (returns date/time database created)
535	>	* TransactionCount (returns no. of active transactions)
536	>	* GetDatabasePage(PageNo: integer) (returns contents of specified database page - SYSDBA only).
537	>	* PagesFree (Firebird 3 or later)
538	>	* PagesUsed (Firebird 3 or later)
539	>	* Encrypted (returns true if database encrypted. (Firebird 3.0.3 or later only)
540	>	* EncryptionKeyName (returns the name of the encryption key if any (Firebird 3.0.3 or later only)
541	>
542	>	29. IBServices classes now provided the decoded release number in the (array) property ServerVersionNo.
543	>
544	>	30. TIBSecurityService now supports display/modification of the User Admin Role (Firebird 2.5 and later).
545	>
546	>	31. TIBConfigService now has a procedure SetAutoAdmin(Value: boolean) to enable/disable
547	>	the automtic mapping of privileged OS users to the RDB$ADMIN role (Firebird 2.5 and later).
548	>
549	>	32. TIBBackupService: New Option - NoDBTriggers equivalent to -nodbtriggers switch introduced
550	>	in the gbak utility at V.2.1 to prevent database-level and transaction-level triggers from
551	>	firing during backup and restore.
552	>
553	>	33. Both TIBBackupService and TIBRestoreService now support backup/restore statistics options
554	>	for verbose output using the new property "StatisticsRequested".
555	>	see https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-util-gbak.html#rnfb25-util-gbakstats
556	>
557	>	34. TIBRestoreService: now supports new options RestoreMetaDataOnly (Firebird 2.5 and later).
558	>
559	>	35. TIBOnlineValidationService component added to the IBServices and the "Firebird Admin"
560	>	palette. This uses the online validation feature added in Firebird 2.5. The
561	>	services's properties enable inclusion/exclusion of tables and indexes using
562	>	regular expressions. See.
563	>	https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-apiods-api.html#rnfb25-apiods-api-onlinevalidation
564	>
565	>	36. IBServices: procedure TIBConfigService.SetNoLinger added to set no linger
566	>	option on a database.
567	>
568	>	37. TIBCustomService: Assign method implemented to allow copying of service login
569	>	context between service API components. "Detach" method now only detaches
570	>	service when last reference to the service interface detaches. Tidy up of
571	>	code for SetActive and Attach methods including password hiding.
572	>
573	>	38. TIBDatabase: new properties: AuthenticationMethod and RemoteProtocol. Read only
574	>	and used to determine the auth method and protocol used for the connection.
575	>
576	>	39. TIBDatabase: ensure that SQLDialect setting is used when creating a database using
577	>	a Create Database Statement generated by IBX.
578	>
579	>	40. All IBServices now have an additional published property "PortNo". This may
580	>	be set to a non-standard port number when necessary. If zero then the default
581	>	port number is used.
582	>
583	>	41: TIBLookupComboeditBox: Ensure dataset updated when change selected with the keyboard
584	>	and not just the mouse.
585	>
586	>	42. TIBCustomDataset: reopen query if already active when a TIBControlLink is added.
587	>
588	>	43. TIBTreeview: new ImageIndexField and SelectedIndexField Property allows the
589	>	image index and selected image index for each node to be set from a database field.
590	>
591	>	44. TIBExtract: new extract type (etGrantsToUser) for use with eoDatabase. If included
592	>	then database schema includes grants to all users. If not present then the
593	>	only user grants included are those to User PUBLIC.
594	>
595	>	45. TIBTreeView: performance improvement. When expanding include both expanded node
596	>	and child nodes in dataset.
597	>
598	>
599	>	IBX Change Log  version                            (2.1-0) Fri, 15 Dec 2017 12:20:11 +0000
600	>
601	>	1. IBCustomDataset: Minor change of PChar to PByte for compatibility with fbintf
602	>	changes.
603	>
604	>	2. IBCustomDataset: Fixed use of incorrect datasize in TIBStringField.SetAsString.
605	>	Bug could result in truncated multi-byte character set values.
606	>
607	>	3. Changes consequential on moving fbintf character set utility functions from
608	>	IFirebirdAPI to IAttachment.
609	>
610	>	4. Avoid "Object is nil" error when opening a database with DefaultSystemCodePage = true
611	>
612	>	5. IBLookupComboEditBox: avoid race condition when autocompleting text that occasionally
613	>	results in autocomplete ignoring prefix text.
614	>
615	>	6. IBLookupComboEditBox: Ensure that cursor is not reset to start of text when
616	>	entering a new name into the text box.
617	>
618	>	7. IBCustomDataset: ensure that TIBStringField uses the field size reported by
619	>	Firebird rather than recomputing it.
620	>
621	>	8. Property Editor positioning tidy up: All IBX Property editors should now be
622	>	screen centre. Previously some were "poDesigned" which may be inappropriate
623	>	for multi monitor desktops.
624	>
625	>	10. TIBTreeView.FindNode: protect against error if zero length path or empty tree node.
626	>
627	>	11. TIBTransaction: On Force Disconnect do not raise an exception when problem ending
628	>	a transaction and always reset the object.
629	>
630	>	12. TIBQuery tidyup: remove unnecessary call to GetAffectedRows.
631	>
632	>	13. TIBXScript: Allow for override of database filename in Create Database statements.
633	>
634	>	14. IBLocaldb: Support initialisation of the database from an SQL script in addition
635	>	to a gbak format archive.
636	>
637	>	15. IBLocaldb: fix problem that stopped the OnSharedDataDir event from being recognised.
638	>
639	>	16. IBLocaldb: Drop database if error creating an empty database.
640	>
641	>	17. TIBTreeView: improve performance when selecting node - avoid refreshing dataset
642	>	unless selected node not in current dataset.
643	>
644	>	18. IBServices: SetDBParams method moved from TCustomIBLocalDBSupport (in IBLocalDB package)
645	>	to TIBCustomService, and IBlocalDB code tidy up.
646	>
647	>	19. IBTreeView: Initialise TIBTreeNode KeyValue to null to avoid unpredictable
648	>	behaviour due to uninitialised variable.
649	>
650	>	20. IBServices: Correct encoding of isc_spb_prp_write_mode in TIBConfigService from
651	>	integer to byte. Ditto isc_spb_prp_reserve_space and isc_spb_prp_access_mode.
652	>
653	>	21. IBSQL: When Database changed ensure that all resources are freed.
654	>
655	>	22. IBCustomDataset: When database changed ensure that queries an unprepared.
656	>
657	>	23. SQL Property Editors now use SynEdit with SQL Highlighter. New features include:
658	>	* Line Wrap on SQL Token boundaries (on user command)
659	>	* auto-complete table names in drop down list of table names
660	>	* Double click on tablename or field name adds to SQL text
661	>
662	>	24. IBDataOutput: print statistics using float (%f) format instead of decimal (%d).
663	>
664	>	25. IBTreeView: Call to FindNode: param type change from "array of Variant" to
665	>	TVariantArray. Seems to avoid memory corruption in Windows (probably a
666	>	workaround for a problem in fpc 3.0.4 win64).
667	>
668	>	26. IBDatabaseInfo: Code tidy up. Add check for database not assigned or not open.
669	>
670	>	27. IBDatabaseInfo: Remove memory leak when accessing database operation counts.
671	>
672	>	IBX Change Log  version                   (2.0-2) Fri, 24 Feb 2017 12:17:53 +0000
673	>
674	>	1. TIBDatabase.CreateDatabase: extract full DB Name from SQL using reg ex in order to
675	>	include remote system name.
676	>
677	>	2. TIBExtract: No longer include comment header and COMMIT statement for empty
678	>	tables when data included in output.
679	>
680	>	3. Profiling: IBSQL now has conditional compilation flags to enable query performance
681	>	and timing information to be written to stdout. This may be used to locate
682	>	performance bottlenecks.
683	>
684	>	4. SQLParser: only call "OnChanging" event handler when value is different.
685	>
686	>	5. IBDynamicGrid: Update handling of navigation keys for a TDateEdit
687	>
688	>	6. IBCustomDataset: Set internalunprepared flag when transaction ends. This ensures
689	>	that BindFields is called when the query is next activated. Avoids FieldName
690	>	not found error.
691	>
692	>	7. IBUpdate: This is a new IBX component similar to TIBUpdateSQL. It is more general
693	>	purpose and allows the programmer to define any action they want for Update, Insert
694	>	or Delete. This may be complex SQL (similar to a Trigger), application specific
695	>	filtering of updates, or use of statements such as Grant or Revoke instead of
696	>	normal DML. See User Manual for more information.
697	>
698	>	IBX Change Log  version                  (2.0-1) Mon, 09 Jan 2017 15:31:49 +0000
699	>
700	>	1. TIBEvents: Fix uninitialised variable that could result in lost events.
701	>
702	>	2. TIBExtract: Added support for FB3 "USAGE" privilege.
703	>
704	>	3. TIBExtract: data formatted as Charset set "octets" is now output using
705	>	hexadecimal notation.
706	>
707	>	4. TIBExtract: Binary Blobs and array data can now be embedded in INSERT statements
708	>	using a simple XML format.
709	>
710	>	5. TIBExtract: extract of individual Triggers and Stored Procedures can now include
711	>	grants to these objects.
712	>
713	>	6. TIBExtract: Stored Procedures and Views output in dependency order to avoid
714	>	dependency problems restoring complex databases.
715	>
716	>	7. TIBXScript: This component has been restructured to allow for the processing of
717	>	embedded XML in INSERT statements and to support interactive sources in addition
718	>	to non-interactive data sources such as files.
719	>
720	>	8. TIBXScript: CREATE DATABASE, DROP DATABASE, CONNECT statements are now supported.
721	>
722	>	9. TIBXScript: ISQL compatiable Set statements are now supported:
723	>	SET SQL DIALECT
724	>	SET TERM
725	>	SET AUTODDL
726	>	SET BAIL
727	>	SET ECHO
728	>	SET COUNT
729	>	SET STATS
730	>	SET NAMES <character set>
731	>
732	>	10. IBVersion unit added to hold current IBX Version Number information.
733	>
734	>	11. TIBExtract: Use character rather than byte length for VarChar procedure arguments.,
735	>	and domain definitions.
736	>
737	>	12. TIBExtract: Triggers now use SQL2003 syntax and database and transaction triggers
738	>	fully supported.
739	>
740	>	13. TIBExtract: when a database dump includes data, the generator values are now also set.
741	>
742	>	14: IBSQLEdit: Unit LCLPlatformDef added to uses clauses for lazarus 1.7 and later.
743	>
744	>	IBX Change Log  version     (2.0-0) Tue, 06 Dec 2016 10:33:44 +0000
745	>
746	>	See also doc/IBX4LazarusGuide.pdf for important information on
747	>	upgrading to IBX2.
748	>
749	>	1. Size property of TIBStringField is now the width in characters of the field
750	>	and not the byte length. This applies only to multi-byte character sets such
751	>	as UTF8. The original approach aligned with TStringField. However, the TStringField
752	>	code is not recognised as a bug and hence this change to align the behaviour.
753	>	The TStringField change is expected in fpc 3.2.0.
754	>
755	>	2. A new property AutoFieldSize: boolean has been added to TIBStringField. When
756	>	true (default) then Size property value saved in the lfm is ignored. Size is
757	>	always set from the dynamic information read from the database. It is unclear
758	>	why anyone would want to override this and set Size to false.
759	>
760	>	3. ibxscript: should now handle correctly a Case..End statement within a procedure
761	>	block.
762	>
763	>	4. IBDatabase: new property - CreateIfNotExists. If true and database does not
764	>	exist when an attempt is made to connect to it (run time only) then an attempt
765	>	is made to create the database.
766	>
767	>	5. IBDatabase: new event - OnCreateDatabase. This event is called after a database
768	>	has been successfully created as a result of a call to CreateDatabase or when
769	>	creating a database after it was found not to exist.
770	>
771	>	6.  DBControlGrid: a race condition could result in the wrong row image being
772	>	written to the cache. This has been avoided by a trip round the message
773	>	loop before rendering the row image.
774	>
775	>	7.  DBControlGrid: It is strongly recommended not to open the source DataSet for
776	>	a DBControlGrid during a Form's "OnShow" event handler. Under GTK2 this is
777	>	known to risk corrupt rendering of row images when the control is first
778	>	displayed. If necessary use "Application.QueueAsyncCall" to delay opening
779	>	of the dataset (see DBControlGrid examples) until the Form's Window has been created.
780	>
781	>	8.  DBControlGrid & IBDynamicGrid: Navigation keys should now work correctly with
782	>	a TDateEdit control located on an editor panel.
783	>
784	>	9.  TIBExtract: brought up-to-date plus many bug fixes.
785	>
786	>	10. DBControlGrid: Removed memory leak when updating rows.
787	>
788	>	11. TIBCMLocalDBSupport: fixed invalid free on upgrade.
789	>
790	>	IBX Change Log  version                                           (1.4-3) Thu, 22 Sep 2016 18:10:15 +0100
791	>
792	>	1. IBCustomDataset: When calling SetCodePage, no longer request transliteration
793	>	when target codepage is CP_NONE. This is a workaround for
794	>	http://bugs.freepascal.org/view.php?id=30622.
795	>
796	>	2. DBLog option removed from TIBStatisticalService - not supported by server
797	>	since Firebird 1.5.
798	>
799	>	3. ibxscript: An error is no longer generated for "on commit preserve rows" or
800	>	similar.
801	>
802	>	4. IBCodePage: updated mapping between codepages and character id.
803	>
804	>	5. ftWideString and ftWideMemo withdrawn. There is no UTF16 character set in
805	>	Firebird. Character sets with a char width of two are not UTF16.
806	>
807	>	6. Strings received from the database are now always transliterated into UTF8
808	>	regardless of the database character set or connection character set. This
809	>	is for compatibility with the LCL.
810	>
811	>	IBX Change Log  version  (1.4-2) Thu, 22 Sep 2016 15:25:27 +0100
812
813		1. IBBlob: Defer reading of blob until read method called. This avoids having to
814		read in an entire blob just to get the size of the blob. General performance

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