readme.htm

SQLite

    <li>Code merge with SQLite 3.4.0</li>
      <li>Fixed a reuse bug in the SQLiteDataAdapter in conjunction with the SQLiteCommandBuilder.&nbsp;
      It's been there unnoticed for more than a year, so it looks like most folks never
      encountered it. </li>
      <li>Fixed an event handler bug in SQLiteCommandBuilder in which it could fail to unlatch
        from the DataAdapter when reused.&nbsp; Relates to the previous bugfix.</li>
      <li>Fixed a double-dispose bug in SQLiteStatement that triggered a SQLiteException.&nbsp;</li>
    </ul>
    <p><b>1.0.42.0 - June 1, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.17</li>
      <li>Changed the SQLiteFunction static constructor so it only enumerates loaded modules
        that have referenced the SQLite assembly, which hopefully should cut down dramatically
        the time it takes for that function to execute.&nbsp;</li>
      <li>Added the FTS2 full-text search extension to the project.&nbsp; Look for FTS1
        to disappear within the next couple of revisions.&nbsp;</li>
      <li>Fixed a bug introduced with the finalizers that triggered an error when statements
        ended with a semi-colon or had other non-parsable comments at the end of a statement&nbsp;</li>
      <li>Fixed an intermittent multi-threaded race condition between the garbage collector
        thread and the main application thread which lead to an occasional SQLITE_MISUSE
        error.</li>
      <li>Fixed another issue relating to SQLite's inherent typelessness when dealing with
        aggregate functions which could return Int64 or Double or even String for a given
        row depending on what was aggregated.</li>
      <li>Remembered to recompile the DDEX portion of the engine this time, so Compact Framework
        users can once again use the design-time functionality</li>
    </ul>
    <p><b>1.0.41.0 - April 23, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.16</li>
      <li>Second go at implementing proper finalizers to cleanup after folks who've forgotten to Dispose() of the SQLite objects</li>
      <li>Enhanced GetSchema(IndexColumns) to provide numeric scale and precision values</li>
      <li>Fixed the column ordinals in GetSchema(IndexColumns) to report the ordinal of the column in the index, not the table</li>
      <li>Fixed a bug whereby parameters named with an empty string (such as String.Empty) were treated like a named parameter instead of an unnamed parameter</li>
    </ul>
    <p><b>1.0.40.0 - January 31, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.12</li>
      <li>Lots of new code to handle misuse of the library.&nbsp; Implemented finalizers
        where it made sense, fixed numerous garbage collector issues when objects are not
        disposed properly, &nbsp;fixed some object lifetime issues, etc.</li>
      <li>A failed Commit() on a transaction no longer leaves the transaction in an unusable
        state.</li>
    </ul>
    <p><b>1.0.39.1 - January 11, 2007</b></p>
    <ul>
    <li>Fixed a really dumb mistake that for some reason didn't trigger any errors in
      the testcases, whereby commands when associated with a connection were not adding
      or removing themselves from an internal list of commands for that connection --
      causing a "database is locked" error when trying to close the connection.</li>
    </ul>
    <p><b>1.0.39.0 - January 10, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.10</li>
      <li>Fixed a multi-threaded race condition bug in the garbage collector when commands
        and/or connections are not properly disposed by the user. </li>
      <li>Switched the encryption's internal deallocation code to use sqlite's built-in
        aux functions instead of modifying the pager.c source to free the crypt block.&nbsp;
        This eliminates the last of the code changes the provider makes to the original
        sqlite engine sources.&nbsp; Props to Ralf Junker for pointing that out.</li>
    </ul>
    <p><b>1.0.38.0 - November 22, 2006</b></p>
    <ul>
    <li>Fixed a bug when using CommandBehavior.KeyInfo whereby integer primary key columns may be duplicated in the results. </li>
      <li>Enhanced the CommandBuilder so that update/delete statements are optimized when the affected table contains unique constraints and
      a primary key is present.</li>
      <li>Fixed a bug in the DataReader when used in conjunction with CommandBehavior.CloseConnection.</li></ul>
    <p><b>1.0.37.0 - November 19, 2006</b></p>
    <ul>
    <li>Added support for CommandBehavior.KeyInfo.&nbsp; 
      When specified in a query, additional column(s) will be returned describing the
      key(s) defined for the table(s) selected in the query.&nbsp; This is optimized when
      INTEGER PRIMARY KEY is set for the given tables, but does additional work for other
      kinds of primary keys.</li>
      <li>Removed the default values from SQLiteDataReader.GetTableSchema(), to better follow
        Sql Server's pattern and suppress schema errors when loading the records into a
        dataset/datatable.</li>
      <li>Allow integers to implicitly convert to double/decimal/single.</li></ul>
    <p><b>1.0.36.1 - October 25, 2006</b></p>
    <ul>
    <li>Added support for LONGVARCHAR, SMALLDATE and SMALLDATETIME.  These were actually added in 1.0.36.0 but were undocumented.</li>
    <li>Fixed the embedded helpfile which was accidentally built from old sources. </li>
    <li>Fixed an unfortunate re-entry of a bug in the .36 codebase that caused the provider to "forget" about commands on a connection under certain circumstances.</li>
    </ul>
    <p><b>1.0.36.0 - October 23, 2006</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.8, including support for full-text search via the FTS1
      extension.&nbsp;</li><li>Fixed a bug retrieving data types when UseUtf16Encoding is true.  Side-effect of further merging the common code between the two base classes.</li>
      <li>Fixed a bug with System.Transactions whereby a connection closed/disposed within
        a transaction scope is rolled back and cannot be committed.</li>
      <li>Added more error checking and reporting to transactions to help user's isolate
        the source of transaction failures.</li>
      <li>Implemented a workaround for a Compact Framework issue regarding strong-named
        assemblies containing a PE section with a raw size less than the virtual size.&nbsp;</li>
    </ul>
    <p><b>1.0.35.1 - September 12, 2006</b></p>
    <ul>
    <li>Fixed the TYPES keyword to work when UseUTF16Encoding is true.</li>
    <li>Fix another bug revealed in 1.0.35.0 regarding infinite loops when the 2nd or subsequent statements of a semi-colon separated command cannot be parsed.</li>
      <li>Updated the help documentation.&nbsp;</li>
    </ul>
    <p><b>1.0.35.0 - September 10, 2006</b></p>
    <ul>
    <li>Fixed an infinite loop bug in SQLiteCommand caused when multiple semi-colon separated
      statements in a single command are executed via datareader and one of the statements
      contains a syntax error preventing it from being prepared.&nbsp;</li><li>Added the TYPES preparser keyword to be placed before a SELECT statement to
    aid the wrapper in converting expressions in a subsequent select clause into more
    robust types.&nbsp; Documentation yet to be integrated, but available on the forums.</li>
      <li>Added a new connectionstring parameter "BinaryGUID=true/false" (default is "true").&nbsp;
        When true, guid types are stored in the database as binary blobs to save space.&nbsp;
        Binary has been the default format since 1.0.32.0 but this parameter eases backward
        compatibility.</li>
    </ul>
    <p><b>1.0.34.0 - September 4, 2006</b></p>
    <ul>
    <li>Fixed a bug in SQLiteParameterCollection.RemoveAt(namedparam)</li>
    <li>Fixed a bug in SQLiteDataReader introduced in 1.0.30 that broke DateTimes using the Ticks option in the connection string.</li>
      <li>Fixed a bug in the recent changes to guid behavior wherein using a datareader's
        indexer to fetch a guid from a column containing both binary and text guids would
        sometimes return a byte array instead of a guid.</li>
      <li>Enacted a workaround involving typed datasets in Compact Framework projects in
        which it took an excessive amount of time to open a form and generated a lot of
        temporary files in the user's Local Settings\Application Data\Microsoft\VisualStudio\8.0\Assembly
        References folder.</li>
    </ul>
    <p><b>1.0.33.0 - August 21, 2006</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.7</li>
      <li>Fixed a bug in SQLiteConnection that caused it to "forget" about commands bound
      to it and occasionally throw an error when a database is closed and opened repeatedly.&nbsp;
      </li>
    </ul>
    <p><b>1.0.32.0 - August 6, 2006</b></p>
    <ul>
    <li>Added AllowPartiallyTrustedCallers attribute to the assembly</li><li>Added the missing "nchar" type</li>
      <li>Added support for binary Guid's.&nbsp; Guids are now stored as binary by default
        when using parameterized queries.&nbsp; Text guids are still fully supported.</li>
      <li>Fixed a TransactionScope() error that caused the transaction not to be completed.</li>
      <li>Enhanced parameter names so that if they are added to the Parameters collection
        without their prefix character (@ : or $) they are still properly mapped.&nbsp;</li>
    </ul>
    <p><b>1.0.31.0 - July 16, 2006</b></p>
    <ul>
    <li>Re-applied the view parsing bugfix in 1.0.29.0 that was accidentally reverted
      out of the 30 build.</li><li>Fixed SQLiteCommand.ExecuteScalar() to return null instead of DbNull.Value
    when no rows were returned.</li>
      <li>Design-time installer now installs the package-based designer on full Visual Studio
        versions.&nbsp; Express editions continue to use the packageless designer.</li>
      <li>In Visual Studio (not Express), you can now right-click a SQLite connection in
        the Server Explorer and vacuum the database and change the encryption password.</li>
    </ul>
    <p><b>1.0.30.1 - July 2, 2006</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.6</li>
      <li>Added support for the |DataDirectory| keyword in the Data Source filename string.&nbsp;
      </li>
      <li>Added hook notification support to SQLiteConnection.&nbsp; Specifically, there
      are three new events on the SQLiteConnection object which are raised when an update/insert/delete
      occurs and when transactions are committed and rolled back.</li><li>Changed SQLiteTransaction to default to BEGIN IMMEDIATE instead of just BEGIN,
    which solves a multithreaded race condition.&nbsp;</li>
      <li>Changed SQLiteDataReader to better support SQLite's typelessness.&nbsp; The data
        reader no longer caches column affinity, but re-evaluates it for each column/row.</li>
      <li>Fixed a bug in Prepare() which caused an intermittant fault due to the code accessing
        the memory of an unpinned variable.&nbsp;</li>
      <li>Fixed a multithreaded lock-retry bug in in SQLiteConnection.Open() and in
    SQLiteTransaction, which failed to use a command timeout before giving up.</li>
    </ul>
    <p><b>1.0.29.0 - May 16, 2006</b></p>
    <ul>
    <li>Fixed a bug in the Views schema information which caused multi-line view definition statements not to be parsed</li>
    <li>Fixed a parsing bug in SQLiteDataReader.GetSchemaTable() to account for numeric(x,y) datatypes with specified precision and scale</li>
    <li>Fixed a bug in SQLiteConnection.Open() which tried to automatically enlist in an ambient transaction but had not yet set the state of the database to Opened, thereby causing a transaction fault</li>
    <li>Changed SQLiteException to inherit from DbException on the full framework</li>
    </ul>
    <p><b>1.0.28.0 - April 14, 2006</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.5</li>
      <li>You can now specify a relative path in the Compact Framework's "Data Source" by
        prefixing the file with ".\".&nbsp; i.e. "Data Source=.\\mydb.db3"</li>
      <li>Several more changes and enhancements to schemas for better compatibility.</li>
      <li>Fixed several bugs with the 64-bit builds of the provider.&nbsp; The x64 binary
        is now optimized.</li>
      <li>Design-time installer now tries to install the 64-bit builds into the GAC along
        with the 32-bit build.</li>
      <li>Fixed a bug in the SQLiteDataReader.GetSchemaTable() function when used with tables
        containing apostrophes.</li>
      <li>Fixed an XSD-related bug whereby the XSD utility was unable to locate the provider
        and could not generate typed datasets.</li>
      <li>Added NTEXT and STRING datatypes to the list of recognized keywords (used for
        schema retrieval).</li>
      <li>Due to the XSD bug and other potential problems related to external build utilities,
        changes to the installation of the designer have had to be made.&nbsp; The installer
        used to write the DbProviderFactories XML into the devenv.exe.config file and its
        express cousins, but now has to write instead to the machine.config.</li>
      <li>Installer writes to both the 32-bit machine.config and the 64-bit machine.config
        if it exists.&nbsp;</li>
    </ul>
    <p><b>1.0.27.1 - February 28, 2006</b></p>
    <ul>
    <li>Fixed a bug when doing data binding in Compact Framework projects that prevented
      you from assigning a typed dataset to a bindingsource.&nbsp; It turns out, the CF
      version of the SQLite provider needs to be flagged as retargetable so it'll work
      in the design-time desktop environment.&nbsp; No changes were made to the desktop
      build, but the revision was bumped on all libraries anyway in order to keep them
      sync'd.&nbsp;</li></ul>
    <p><b>1.0.27.0 - February 27, 2006</b></p>
    <ul>
    <li>Many optimizations and a few more minor adjustments to schemas and schema retrieval
      performance.</li>
      <li>Lots of design-time attributes added to the code.&nbsp; The DbDataAdapter, DbCommand,
        and DbConnection objects now have greatly enhanced design-time capabilities when
        added to the toolbox and dropped on a form.</li>
      <li>Lots of Server Explorer enhancements.</li>
      <li>Binaries are now distributed in a setup program for easier administration and
        configuration of the provider.</li>
    </ul>
    <p><b>1.0.26.2 - February 15, 2006</b></p>
    <ul>
    <li>Yet another bugfix to index schemas, which was incorrectly marking most indexes
      as primary key indexes.</li><li>Fixed GetSchema() to accept a null string array.</li><li>Fixed a misspelled export in the core C library that prevented databases opened
    with UTF16Encoding from getting schema information and would likely cause an error
    if attempted.</li></ul>
    <p><b>1.0.26.1 - February 14, 2006</b></p>
    <ul>
    <li>Fixed even more minor schema bugs having to do with indexes.</li><li>Added two missing pieces in the SQLite designer which were preventing it from
    being used from within VS Express editions.&nbsp;</li><li>Several bugfixes to the design-time installer program, including supporting
    64-bit environments.</li></ul>
    <p><b>1.0.26.0 - February 11, 2006</b></p>