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[ANNOUNCEMENT] Updated: sqlite3-3.6.2-1
- From: Warren Young <warren at etr-usa dot com>
- To: cygwin at cygwin dot com
- Date: Mon, 14 Dec 2009 10:11:24 -0700
- Subject: [ANNOUNCEMENT] Updated: sqlite3-3.6.2-1
- Reply-to: cygwin at cygwin dot com
License : Public Domain (no, really!)
SQLite is a C library providing local database storage with a SQL
interface. Unlike most SQL database systems, SQLite does not accept
connections from remote users. Access to the database requires access
to the file system hosting it; SQLite thus relies on the operating
system's file security for access control. In exchange for this
limitation, you get a smaller, faster database engine that's easy to
embed within a program.
CHANGES SINCE LAST RELEASE
Changes since previous, 3.6.2-1:
2009 Dec 07 (3.6.21)
* The SQL output resulting from sqlite3_trace() is now modified to
include the values of bound parameters.
* Performance optimizations targetting a specific use case from a
single high-profile user of SQLite. A 12% reduction in the number
of CPU operations is achieved (as measured by valgrind). Actual
performance improvements in practice may vary depending on
workload. Changes include:
o The ifnull() and coalesce() SQL functions are now
implemented using in-line VDBE code rather than calling
external functions, so that unused arguments need never be
o The substr() SQL function does not bother to measure the
length its entire input string if it is only computing a
o Unnecessary OP_IsNull, OP_Affinity, and OP_MustBeInt VDBE
opcodes are suppressed
o Various code refactorizations for performance
* The FTS3 extension has undergone a major rework and cleanup. New
FTS3 documentation is now available.
* The SQLITE_SECURE_DELETE compile-time option fixed to make sure
that content is deleted even when the truncate optimization
* Improvements to "dot-command" handling in the Command Line
* Other minor bug fixes and documentation enhancements.
2009 Nov 4 (3.6.20)
* Optimizer enhancement: prepared statements are automatically
re-compiled when a binding on the RHS of a LIKE operator changes
or when any range constraint changes under SQLITE_ENABLE_STAT2.
* Various minor bug fixes and documentation enhancements.
2009 Oct 30 (220.127.116.11)
* A small patch to version 3.6.16 to fix the OP_If bug.
2009 Oct 14 (3.6.19)
* Added support for foreign key constraints. Foreign key
constraints are disabled by default. Use the foreign_keys pragma
to turn them on.
* Generalized the IS and IS NOT operators to take arbitrary
expressions on their right-hand side.
* The TCL Interface has been enhanced to use the Non-Recursive
Engine (NRE) interface to the TCL interpreter when linked against
TCL 8.6 or later.
* Fix a bug introduced in 3.6.18 that can lead to a segfault when
an attempt is made to write on a read-only database.
2009 Sep 11 (3.6.18)
* Versioning of the SQLite source code has transitioned from CVS to
* Query planner enhancements.
* The SQLITE_ENABLE_STAT2 compile-time option causes the ANALYZE
command to collect a small histogram of each index, to help
SQLite better select among competing range query indices.
* Recursive triggers can be enabled using the PRAGMA
* Delete triggers fire when rows are removed due to a REPLACE
conflict resolution. This feature is only enabled when recursive
triggers are enabled.
* Added the SQLITE_OPEN_SHAREDCACHE and SQLITE_OPEN_PRIVATECACHE
flags for sqlite3_open_v2() used to override the global shared
cache mode settings for individual database connections.
* Added improved version identification features: C-Preprocessor
macro SQLITE_SOURCE_ID, C/C++ interface sqlite3_sourceid(), and
SQL function sqlite_source_id().
* Obscure bug fix on triggers ([efc02f9779]).
2009 Aug 10 (3.6.17)
* Expose the sqlite3_strnicmp() interface for use by extensions and
* Remove the restriction on virtual tables and shared cache mode.
Virtual tables and shared cache can now be used at the same time.
* Many code simplifications and obscure bug fixes in support of
providing 100% branch test coverage.
2009 June 27 (3.6.16)
* Fix a bug (ticket #3929) that occasionally causes INSERT or
UPDATE operations to fail on an indexed table that has a
* Other minor bug fixes and performance optimizations.
2009 June 15 (3.6.15)
* Refactor the internal representation of SQL expressions so that
they use less memory on embedded platforms.
* Reduce the amount of stack space used
* Fix an 64-bit alignment bug on HP/UX and Sparc
* The sqlite3_create_function() family of interfaces now return
SQLITE_MISUSE instead of SQLITE_ERROR when passed invalid
* When new tables are created using CREATE TABLE ... AS SELECT ...
the datatype of the columns is the simplified SQLite datatype
(TEXT, INT, REAL, NUMERIC, or BLOB) instead of a copy of the
original datatype from the source table.
* Resolve race conditions when checking for a hot rollback journal.
* The sqlite3_shutdown() interface frees all mutexes under windows.
* Enhanced robustness against corrupt database files
* Continuing improvements to the test suite and fixes to obscure
bugs and inconsistencies that the test suite improvements are
2009 May 25 (18.104.22.168)
* Fix a code generator bug introduced in version 3.6.14. This bug
can cause incorrect query results under obscure circumstances.
2009 May 19 (22.214.171.124)
* Fix a bug in group_concat(), ticket #3841
* Fix a performance bug in the pager cache, ticket #3844
* Fix a bug in the sqlite3_backup implementation that can lead to a
corrupt backup database. Ticket #3858.
2009 May 7 (3.6.14)
* Added the optional asynchronous VFS module.
* Enhanced the query optimizer so that virtual tables are able to
make use of OR and IN operators in the WHERE clause.
* Speed improvements in the btree and pager layers.
* Added the SQLITE_HAVE_ISNAN compile-time option which will cause
the isnan() function from the standard math library to be used
instead of SQLite's own home-brew NaN checker.
* Countless minor bug fixes, documentation improvements, new and
improved test cases, and code simplifications and cleanups.
2009 April 13 (3.6.13)
* Fix a bug in version 3.6.12 that causes a segfault when running a
count(*) on the sqlite_master table of an empty database. Ticket
* Fix a bug in version 3.6.12 that causes a segfault that when
inserting into a table using a DEFAULT value where there is a
function as part of the DEFAULT value expression. Ticket #3791.
* Fix data structure alignment issues on Sparc. Ticket #3777.
* Other minor bug fixes.
2009 March 31 (3.6.12)
* Fixed a bug that caused database corruption when an
incremental_vacuum is rolled back in an in-memory database.
* Added the sqlite3_unlock_notify() interface.
* Added the reverse_unordered_selects pragma.
* The default page size on windows is automatically adjusted to
match the capabilities of the underlying filesystem.
* Add the new ".genfkey" command in the CLI for generating triggers
to implement foreign key constraints.
* Performance improvements for "count(*)" queries.
* Reduce the amount of heap memory used, especially by TRIGGERs.
2009 Feb 18 (3.6.11)
* Added the hot-backup interface.
* Added new commands ".backup" and ".restore" to the CLI.
* Added new methods backup and restore to the TCL interface.
* Improvements to the syntax bubble diagrams
* Various minor bug fixes
2009 Jan 15 (3.6.10)
* Fix a cache coherency problem that could lead to database
corruption. Ticket #3584.
2009 Jan 14 (3.6.9)
* Fix two bugs, which when combined might result in incorrect query
results. Both bugs were harmless by themselves; only when they
team up do they cause problems. Ticket #3581.
2009 Jan 12 (3.6.8)
* Added support for nested transactions
* Enhanced the query optimizer so that it is able to use multiple
indices to efficiently process OR-connected constraints in a
* Added support for parentheses in FTS3 query patterns using the
SQLITE_ENABLE_FTS3_PARENTHESIS compile-time option.
2008 Dec 16 (3.6.7)
* Reorganize the Unix interface in os_unix.c
* Added support for "Proxy Locking" on MacOSX.
* Changed the prototype of the sqlite3_auto_extension() interface
in a way that is backwards compatible but which might cause
warnings in new builds of applications that use that interface.
* Changed the signature of the xDlSym method of the sqlite3_vfs
object in a way that is backwards compatible but which might
cause compiler warnings.
* Added superfluous casts and variable initializations in order to
suppress nuisance compiler warnings.
* Fixes for various minor bugs.
2008 Nov 26 (126.96.36.199)
* Fix a bug in the b-tree delete algorithm that seems like it might
be able to cause database corruption. The bug was first
introduced in version 3.6.6 by check-in  on 2008-11-13.
* Fix a memory leak that can occur following a disk I/O error.
2008 Nov 22 (188.8.131.52)
* Fix a bug in the page cache that can lead database corruption
following a rollback. This bug was first introduced in version
* Two other very minor bug fixes
2008 Nov 19 (3.6.6)
* Fix a #define that prevented memsys5 from compiling
* Fix a problem in the virtual table commit mechanism that was
causing a crash in FTS3. Ticket #3497.
* Add the application-defined page cache
* Added built-in support for VxWorks
2008 Nov 12 (3.6.5)
* Add the MEMORY option to the journal_mode pragma.
* Added the sqlite3_db_mutex() interface.
* Added the SQLITE_OMIT_TRUNCATE_OPTIMIZATION compile-time option.
* Fixed the truncate optimization so that sqlite3_changes() and
sqlite3_total_changes() interfaces and the count_changes pragma
return the correct values.
* Added the sqlite3_extended_errcode() interface.
* The COMMIT command now succeeds even if there are pending
queries. It returns SQLITE_BUSY if there are pending incremental
BLOB I/O requests.
* The error code is changed to SQLITE_BUSY (instead of
SQLITE_ERROR) when an attempt is made to ROLLBACK while one or
more queries are still pending.
* Drop all support for the experimental memory allocators memsys4
* Added the SQLITE_ZERO_MALLOC compile-time option.
2008 Oct 15 (3.6.4)
* Add option support for LIMIT and ORDER BY clauses on DELETE and
UPDATE statements. Only works if SQLite is compiled with
* Added the sqlite3_stmt_status() interface for performance
* Add the INDEXED BY clause.
* The LOCKING_STYLE extension is now enabled by default on Mac OS X
* Added the TRUNCATE option to PRAGMA journal_mode
* Performance enhancements to tree balancing logic in the B-Tree
* Added the source code and documentation for the genfkey program
for automatically generating triggers to enforce foreign key
* Added the SQLITE_OMIT_TRUNCATE_OPTIMIZATION compile-time option.
* The SQL language documentation is converted to use syntax
diagrams instead of BNF.
* Other minor bug fixes
2008 Sep 22 (3.6.3)
* Fix for a bug in the SELECT DISTINCT logic that was introduced by
the prior version.
* Other minor bug fixes
INSTALL OR UPGRADE NOTES
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