version.html

来自「sqlite 3.3.8 支持加密的版本」· HTML 代码 · 共 675 行 · 第 1/3 页

          Modified SQLite3.Reset() and Step() functions to transparently handle timeouts 
          while waiting on the database to become available (typically when a writer is 
          waiting on a reader to finish, or a reader is waiting on a writer to finish).
          <LI>
          Lots of code cleanup&nbsp;as suggested&nbsp;by the Code Analyzer (FxCop).
          <LI>
          Lots of updates to the helpfile (as you can see).
          <LI>
            Statements&nbsp;were already prepared lazily&nbsp;in a SQLiteCommand, but now 
            its even more lazy.&nbsp; Statements are now only prepared if the statements 
            haven't been previously prepared and a Prepare() function is called (and the 
            command is associated with a connection) or just prior to the command being 
            executed.&nbsp;</LI></UL>
      </DIV>
      <P><B>1.0.11 - August 1, 2005</B><BR>
      </P>
      <UL>
        <LI>
          <STRONG>For everything except the Compact Framework, System.Data.SQLite.DLL is 
            now the <EM>only</EM> DLL required to use this provider!</STRONG>&nbsp; The 
        assembly is now a multi-module assembly, containing both the native SQLite3 
        codebase and the C# classes built on top of it.&nbsp; The Compact Framework 
        version (when completed) will not be able to support this feature, so backwards 
        compatibility with the Compact Framework has been preserved for the future.
        <LI>
          Fixed a bug in SQLiteCommand.ExecuteScalar() that caused it to stop executing 
          commands once it obtained the first column of the first row-returning 
          resultset.&nbsp; Any remaining statements after the row-returning statement was 
          ignored.
        </LI>
      </UL>
      <P><B>1.0.10 - June 10, 2005</B><BR>
      </P>
      <UL>
        <LI>
        Fixed a bug in the SQLite3.cs Prepare() function that created a statement even 
        when the SQLite engine returned a NULL pointer. Typically this occurs when 
        multiple statements are processed and there are trailing comments at the end of 
        the statement.
        <LI>
          Fixed a bug in SQLiteStatement.cs that retrieved parameter names for a 
          parameterized query.&nbsp; SQLite's parameters are 1-based, and the function 
          was starting at 0.&nbsp; This was fine when all parameters were unnamed, but 
          for named parameters it caused the parameters to be out of whack.
        </LI>
      </UL>
      <P><B>1.0.09a - May 25, 2005</B><BR>
      </P>
      <UL>
        <LI>
        Fixed a broken helpfile and corrected some obsolete help remarks in 
        SQLiteFunction.cs
        <LI>
          Added a version resource to the SQLite.Interop.DLL.&nbsp;</LI></UL>
      <P><B>1.0.09 - May 24, 2005</B><BR>
      </P>
      <UL>
        <LI>
        Code merge with the latest 3.21 version of SQLite.
        <LI>
          Removed obsolete methods and properties for Whidbey Beta 2</LI></UL>
      <P><B>1.0.08 Refresh - Mar 24, 2005<BR>
        </B>
      </P>
      <UL>
        <LI>
        Code merge with the latest 3.20 version of SQLite.
        <LI>
          Recompiled the help file to fix a build error in it.
        </LI>
      </UL>
      <P><B>1.0.08 - Mar 11, 2005<BR>
        </B>
      </P>
      <UL>
        <LI>
        Added additional #if statements to support the old beta 1 edition of VS2005.
        <LI>
          Code merged the SQLite 3.14 source.
        </LI>
      </UL>
      <P><B>1.0.07 - Mar 5, 2005</B><BR>
      </P>
      <UL>
        <LI>
        Made more optimizations to frequently-called functions, resulting in 
        significant performance gains in all tests.
        <LI>
          Recompiled the binaries using the latest VS2005 February CTP, resulting in yet 
          more significant speed gains.&nbsp; The 100k insert test used to take 3.5 
          seconds and the insertwithidentity took almost 8 seconds.&nbsp; With the above 
          two changes, those tests are now executing in 1.9 and 4.9 seconds respectively.</LI></UL>
      <P><B>1.0.06 - Mar 1, 2005<BR>
        </B>
      </P>
      <UL>
        <LI>
        Speed-ups to SQLiteDataReader.&nbsp; It was interop'ing unnecessarily every 
        time it tried to fetch a field due to a logic error.
        <LI>
        Changed/Added some code to SQLiteConvert's internal DbType, Type and 
        TypeAffinity functions.
        <LI>
        Fixed the SQLiteDataReader to obey the flags set in the optional 
        CommandBehavior flag from SQLiteCommand.ExecuteReader().
        <LI>
        Changed the default page size to 1024 to reflect the defaults of SQLite.&nbsp; 
        Ignores the "Page Size" connection string option for memory databases, as tests 
        revealed that changing it resulted in memory corruption errors.
        <LI>
          Performance enhancements to the SQLiteCommand and SQLiteStatement classes which 
          reduced the 100,000 row insert execution time as well as the various Function 
          execution times significantly.
        </LI>
      </UL>
      <P><B>1.0.05 - Feb 25, 2005</B>
      </P>
      <UL>
        <LI>
        Fixed the SQLite3 C# class step/reset functions to accomodate schema changes 
        that invalidate a prepared statement.&nbsp; Statements are recompiled 
        transparently.
        <LI>
        Moved all native DLL declarations to an UnsafeNativeMethods class.
        <LI>
        Split several classes into their own modules for readability.
        <LI>
        Renamed many internal variables, reviewed access to variables marked as 
        internal and altered their protection levels accordingly.
        <LI>
        Due to the presence of the altered sqlite3 codebase and so many added interop 
        functions, I decided to rename the sqlite3 C project and the DLL to 
        SQLite.Interop.DLL.&nbsp; This is the same core sqlite3 codebase but designed 
        specifically for this ADO.NET provider.&nbsp; This eliminates any possibility 
        of someone dropping another build of sqlite3.dll into the system and rendering 
        the provider inoperable.&nbsp; In the future if the folks at sqlite.org finally 
        introduce a method of retrieving column usage for an arbitrary prepared 
        statement, I'll retool this library to be a lightweight function call wrapper 
        around the core binary distribution.
        <LI>
        Added [SuppressUnmanagedCodeSecurity] attribute to the UnsafeNativeMethods 
        class which brings VS2005 November CTP execution speeds inline with the 
        December CTP.
        <LI>
          Added a <B>bin</B>
        directory to the project root where pre-compiled binaries can be found.
        <LI>
          Added a <B>doc</B>
        directory where preliminary documentation on the class library can be found.
        <LI>
          Documented a lot more of the classes internally.
        </LI>
      </UL>
      <P><B>1.0.04 - Feb 24, 2005</B>
      </P>
      <UL>
        <LI>
        Removed the SQLiteContext class and revamped the way UserFunctions work to 
        simplify the imlementation.
        <LI>
        Fixed a counting bug in the TestCases class, specifically in the function tests 
        where I wasn't resetting the counter and it was consequently reporting 
        intrinsic and raw select calls as being much much faster than they actually 
        were.&nbsp; The numbers are now much closer to what I expected for performance, 
        with .NET user-functions still being the slowest, but only by a small margin.
        <LI>
        Small performance tweaks to SQLiteDataReader.
        <LI>
        Added PageSize to the SQLiteConnectionStringBuilder and subsequently to the 
        SQLiteConnection
        <LI>
          Added a PRAGMA encoding=XXX execution statement to the SQLiteConnection after 
          opening a connection.
        </LI>
      </UL>
      <P><B>1.0.03 - Feb 23, 2005</B>
      </P>
      <UL>
        <LI>
        Fixed up SQLiteCommandBuilder to correct implementation errors, which resulted 
        in an enormous performance boost in the InsertMany test.&nbsp;&nbsp; 10,000 row 
        insert that executed in 1500ms now executes in 500ms.
        <LI>
        Fixed several errors in the SQLite3_UTF16 class.&nbsp; ToString() was working 
        incorrectly and the Open() method failed to register user defined functions and 
        collations.
        <LI>
        Fixed a bug in SQLiteCommand.ClearCommands() whereby only the first statement 
        was being properly cleaned up.
        <LI>
        Fixed a bug in SQLiteDataReader whereby calling NextResult() would not properly 
        reset the previously-executed command in the sequence.
        <LI>
          Added an InsertManyWithIdentityFetch test, which appends a select clause to 
          populate the ID of the last inserted row into the InsertCommand, demonstrating 
          ADO.NET's ability to auto-fetch identity columns on insert.
        </LI>
      </UL>
      <P><B>1.0.02 - Feb 21, 2005</B></P>
      <UL>
        <LI>
        Tweaks to the xxx_interop functions that return char *'s, so they also return 
        the length.&nbsp; Saves an interop call to get the UTF-8 string length during 
        conversion to a .NET string.
        <LI>
        Reworked the whole interop.c thing into interop.h and reduced the code required 
        to merge the main sqlite3 codebase.
        <LI>
          Added support for user-defined collations.
        </LI>
      </UL>
      <hr />
      <div id="footer">
        <p>
          <a href="mailto:[e-mail]?subject=SQLite.NET%20Class%20Library%20Documentation%20Feedback:%20Version%20History">
            Send comments on this topic.</a>
        </p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>