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# v4.0.2
## Improvements
* [#7208](https://github.com/FirebirdSQL/firebird/issues/7208): Trace: provide performance statistics for DDL statement
Contributor(s): Vlad Khorsun
* [#7194](https://github.com/FirebirdSQL/firebird/issues/7194): Make it possible to avoid _fbclient_ dependency in Pascal programs using _firebird.pas_
Contributor(s): Alex Peshkoff
* [#7168](https://github.com/FirebirdSQL/firebird/issues/7168): Ignore missing UDR libraries during restore
Contributor(s): Adriano dos Santos Fernandes
* [#7161](https://github.com/FirebirdSQL/firebird/issues/7161): Update _zlib_ to version 1.2.12
Contributor(s): Vlad Khorsun
* [#7093](https://github.com/FirebirdSQL/firebird/issues/7093): Improve indexed lookup speed of strings when the last keys characters are part of collated contractions
Contributor(s): Adriano dos Santos Fernandes
* [#7092](https://github.com/FirebirdSQL/firebird/issues/7092): Improve performance of `CURRENT_TIME`
Contributor(s): Adriano dos Santos Fernandes
* [#7042](https://github.com/FirebirdSQL/firebird/issues/7042): `ON DISCONNECT` triggers are not executed during forced attachment shutdown
Contributor(s): Ilya Eremin
* [#7041](https://github.com/FirebirdSQL/firebird/issues/7041): Firebird port for Apple M1 architecture
Contributor(s): Jonathan Frutos, Alex Peshkoff, Adriano dos Santos Fernandes
* [#7038](https://github.com/FirebirdSQL/firebird/issues/7038): Improve performance of `STARTING WITH` with insensitive collations
Contributor(s): Adriano dos Santos Fernandes
* [#6730](https://github.com/FirebirdSQL/firebird/issues/6730): Trace: provide ability to see `STATEMENT RESTART` events (or their count)
Contributor(s): Vlad Khorsun
## Bugfixes
* [#7229](https://github.com/FirebirdSQL/firebird/issues/7229): `ALTER COLUMN DROP IDENTITY` does not reset generator name in metadata cache
Contributor(s): Adriano dos Santos Fernandes
* [#7222](https://github.com/FirebirdSQL/firebird/issues/7222): Dependencies of packaged functions are not tracked
Contributor(s): Adriano dos Santos Fernandes
* [#7204](https://github.com/FirebirdSQL/firebird/issues/7204): Segfault in _GBAK_ when restoring a broken backup file over the wire
Contributor(s): Alex Peshkoff
* [#7202](https://github.com/FirebirdSQL/firebird/issues/7202): _ISQL -ch utf8_ (Windows only): either silently quits to OS or issues non-expected 'malformed string' when non-ASCII character occurs in the typed command
Contributor(s): Adriano dos Santos Fernandes
* [#7200](https://github.com/FirebirdSQL/firebird/issues/7200): `DROP DATABASE` leads to hang if it is issued while database encrypting/decrypting is in progress
Contributor(s): Alex Peshkoff
* [#7199](https://github.com/FirebirdSQL/firebird/issues/7199): Various errors (strange messages in firebird.log, segfaults) with high rate of attach/detach database operations
Contributor(s): Alex Peshkoff
* [#7197](https://github.com/FirebirdSQL/firebird/issues/7197): Segfault in Linux CS after successful detach from database
Contributor(s): Alex Peshkoff
* [#7194](https://github.com/FirebirdSQL/firebird/issues/7194): _GSTAT_ fails but returns 0 as error code if incorrect _databases.conf_ is used
Contributor(s): Alexey Mochalov
* [#7188](https://github.com/FirebirdSQL/firebird/issues/7188): Memory leak in _fbclient_ when a multi-database transaction is used
Contributor(s): Alex Peshkoff
* [#7184](https://github.com/FirebirdSQL/firebird/issues/7184): _GBAK_ output is not being flushed to disk
Contributor(s): Alex Peshkoff
* [#7179](https://github.com/FirebirdSQL/firebird/issues/7179): Wrong error message - "string right truncation. expected length 30, actual 30."
Contributor(s): Adriano dos Santos Fernandes
* [#7178](https://github.com/FirebirdSQL/firebird/issues/7178): DEFAULTed grants to PUBLIC must act as DEFAULTed to every user
Contributor(s): Roman Simakov
* [#7176](https://github.com/FirebirdSQL/firebird/issues/7176): Incorrect error "Invalid token. Malformed string." with UNION + blob + non-UTF8 varchar
Contributor(s): Adriano dos Santos Fernandes
* [#7167](https://github.com/FirebirdSQL/firebird/issues/7167): Incorrect transliteration of field names in constraint violation errors
Contributor(s): Adriano dos Santos Fernandes
* [#7160](https://github.com/FirebirdSQL/firebird/issues/7160): Missing checkout in the trace manager when performing user mapping may cause server hang
Contributor(s): Alex Peshkoff
* [#7150](https://github.com/FirebirdSQL/firebird/issues/7150): Replication not restarting after network failure
Contributor(s): Dmitry Yemanov
* [#7147](https://github.com/FirebirdSQL/firebird/issues/7147): Problems with use of big timeout (or no timeout at all) in the trace service
Contributor(s): Alex Peshkoff
* [#7141](https://github.com/FirebirdSQL/firebird/issues/7141): Services manager breaks long lines into 1023 bytes portions when using _isc_info_svc_line_ in _Service::query()_
Contributor(s): Adriano dos Santos Fernandes
* [#7140](https://github.com/FirebirdSQL/firebird/issues/7140): Wrong select result in case of special sort character
Contributor(s): Adriano dos Santos Fernandes
* [#7139](https://github.com/FirebirdSQL/firebird/issues/7139): With multiple trace sessions user may receive trace events related to engine's requests
Contributor(s): Alex Peshkoff
* [#7138](https://github.com/FirebirdSQL/firebird/issues/7138): Problems accessing FB4 database, copied from another host
Contributor(s): Alex Peshkoff
* [#7135](https://github.com/FirebirdSQL/firebird/issues/7135): Firebird engine randomly fails when delivering mapping clear signal to other processes
Contributor(s): Alex Peshkoff
* [#7134](https://github.com/FirebirdSQL/firebird/issues/7134): Database page errors directly after _GBAK_, dissappearing after some calls of _GFIX_
Contributor(s): Vlad Khorsun
* [#7128](https://github.com/FirebirdSQL/firebird/issues/7128): Incorrect error message with _isc_sql_interprete()_
Contributor(s): Vlad Khorsun
* [#7124](https://github.com/FirebirdSQL/firebird/issues/7124): Inconsistent _RDB$USER_PRIVILEGES_ after dropping identity
Contributor(s): Adriano dos Santos Fernandes
* [#7123](https://github.com/FirebirdSQL/firebird/issues/7123): ISQL does not extract `INCREMENT BY` for IDENTITY column
Contributor(s): Adriano dos Santos Fernandes
* [#7122](https://github.com/FirebirdSQL/firebird/issues/7122): Invalid state of mapping cache after replacement of database
Contributor(s): Alex Peshkoff
* [#7121](https://github.com/FirebirdSQL/firebird/issues/7121): Mapping error when server tries to use mapping rules from database in full shutdown mode
Contributor(s): Alex Peshkoff
* [#7119](https://github.com/FirebirdSQL/firebird/issues/7119): Database statistics service could not find existing table(s)
Contributor(s): Vlad Khorsun
* [#7118](https://github.com/FirebirdSQL/firebird/issues/7118): Chained `JOIN .. USING` across the same column names may be optimized badly
Contributor(s): Dmitry Yemanov
* [#7113](https://github.com/FirebirdSQL/firebird/issues/7113): Wrong path in Object Pascal's readme.md
Contributor(s): Alex Peshkoff
* [#7112](https://github.com/FirebirdSQL/firebird/issues/7112): Avoid unload of plugins in MacOS due to problematic reload of them
Contributor(s): Adriano dos Santos Fernandes
* [#7108](https://github.com/FirebirdSQL/firebird/issues/7108): Firebird does not find an record when adding a foreign key
Contributor(s): Adriano dos Santos Fernandes
* [#7106](https://github.com/FirebirdSQL/firebird/issues/7106): Wrong detection of must-be-delimited user names
Contributor(s): Alex Peshkoff
* [#7103](https://github.com/FirebirdSQL/firebird/issues/7103): FB service hangs after several `DELETE FROM MON$STATEMENTS` being issued in order to stop ES/EDS which waits record for updating
Contributor(s): Vlad Khorsun
* [#7099](https://github.com/FirebirdSQL/firebird/issues/7099): Incomplete _op_batch_cs_ response with _TAG_MULTIERROR_
Contributor(s): Alex Peshkoff
* [#7096](https://github.com/FirebirdSQL/firebird/issues/7096): Client install on Windows is missing some files
Contributor(s): Paul Reeves
* [#7094](https://github.com/FirebirdSQL/firebird/issues/7094): Incorrect indexed lookup of strings when the last keys characters are part of collated contractions and there is multi-segment insensitive descending index
Contributor(s): Adriano dos Santos Fernandes
* [#7090](https://github.com/FirebirdSQL/firebird/issues/7090): Performance degradation with `CURRENT_DATE`, `LOCALTIME` and `LOCALTIMESTAMP`
Contributor(s): Adriano dos Santos Fernandes
* [#7084](https://github.com/FirebirdSQL/firebird/issues/7084): Creating unique constraints on MacOS fails on larger tables
Contributor(s): Adriano dos Santos Fernandes
* [#7080](https://github.com/FirebirdSQL/firebird/issues/7080): Executing batch crashes the server
Contributor(s): Alex Peshkoff
* [#6947](https://github.com/FirebirdSQL/firebird/issues/6947): Query to MON$ tables does not return data when database encryption/decryption is in progress
Contributor(s): Adriano dos Santos Fernandes
* [#4085](https://github.com/FirebirdSQL/firebird/issues/4085): _RDB$INDICES_ information stored inconsistently after a `CREATE INDEX`
Contributor(s): Dmitry Yemanov
* [#3357](https://github.com/FirebirdSQL/firebird/issues/3357): Bad execution plan if some stream depends on multiple streams via a function
Contributor(s): Dmitry Yemanov
# v4.0.1
## New features