Documentation Source Text

chng {2012 February 1 (3.7.10)} {
<li>The default [schema format number] is changed from 1 to 4.
    This means that, unless
    the [PRAGMA legacy_file_format | PRAGMA legacy_file_format=ON] statement is
    run, newly created database files will be unreadable by version of SQLite
    prior to 3.3.0 (2006-01-10).  It also means that the [descending indices]
    are enabled by default.
<li>The sqlite3_pcache_methods structure and the [SQLITE_CONFIG_PCACHE]
    and [SQLITE_CONFIG_GETPCACHE] configuration parameters are deprecated.
    They are replaced by a new [sqlite3_pcache_methods2] structure and
    [SQLITE_CONFIG_PCACHE2] and [SQLITE_CONFIG_GETPCACHE2] configuration
    parameters.
<li>Added the [sqlite3_db_release_memory()] interface and the
    [shrink_memory pragma].
<li>Added the [sqlite3_db_filename()] interface.
<li>Enhance the query planner to support index queries with range constraints
    on the rowid.
<li>Enhanced the windows [VFS] so that all system calls can be overridden
    using the xSetSystemCall interface.
<li>Updated the "unix-dotfile" [VFS] to use locking directories with mkdir()
    and rmdir() instead of locking files with open() and unlink().
<li>Fix the unix [VFS] to be tolerate of read() system calls that return 
    less then the full number of requested bytes.
}

chng {2011 November 1 (3.7.9)} {
<li>If a search token (on the right-hand side of the MATCH operator) in
    [FTS4] begins with "&#94;" then that token must be the first in its field
    of the document.  <b>** Potentially Incompatible Change **</b>
<li>Added options [SQLITE_DBSTATUS_CACHE_HIT] and [SQLITE_DBSTATUS_CACHE_MISS]

<li>Two other very minor bug fixes</li>
}

chng {2008 Nov 19 (3.6.6)} {
<li>Fix a #define that prevented [memsys5] from compiling</li>
<li>Fix a problem in the virtual table commit mechanism that was causing
    a crash in FTS3.  [Ticket #3497].</li>
<li>Add the [sqlite3_pcache_methods2 | application-defined page cache]</li>
<li>Added built-in support for VxWorks</li>
}

chng {2008 Nov 12 (3.6.5)} {
<li>Add the MEMORY option to the [journal_mode pragma].</li>
<li>Added the [sqlite3_db_mutex()] interface.</li>
<li>Added the [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option.</li>

}
  

newsitem {2008-Nov-19} {Version 3.6.6} {
  SQLite [version 3.6.5] is released.  This is a quick turn-around release
  that fixes a bug in virtual tables and FTS3 that snuck into
  [version 3.6.5].  This release also adds the new
  application-defined page cache mechanism.
}

newsitem {2008-Nov-12} {Version 3.6.5} {
  SQLite [version 3.6.5] is released.  There are various minor feature
  enhancements and numerous obscure bug fixes. 
  The [version 3.6.5|change log] contains the details.  Upgrading is
  optional.

Pragma cache_size {
    <p>^(<b>PRAGMA cache_size;
       <br>PRAGMA cache_size = </b><i>Number-of-pages</i><b>;</b></p>
    <p>Query or change the suggested maximum number of database disk pages
    that SQLite will hold in memory at once per open database file.)^  Whether
    or not this suggestion is honored is at the discretion of the
    [sqlite3_pcache_methods2 | Application Defined Page Cache].
    Alternative application-defined page cache implementations
    may choose to interpret the suggested cache size in different ways
    or to ignore it all together.
    ^The default suggested cache size is 2000.</p>

    <p>^The suggested cache size is set to the absolute value of the
    <i>Number-of-pages</i> argument given to this pragma.</p>

    DISCLAIMER

    <p>Query or change the short-column-names flag. This flag affects
    the way SQLite names columns of data returned by [SELECT] statements.
    See the [full_column_names] pragma for full details.
    </p>
}

Pragma shrink_memory {
    <p><b>PRAGMA shrink_memory</b></p>

    <p>^This pragma causes the database connection on which it is invoked
    to free up as much memory as it can, by calling
    [sqlite3_db_release_memory()].
    </p>
}

Pragma synchronous {
    <p>^(<b>PRAGMA synchronous;
       <br>PRAGMA synchronous = </b>
          <i>0 | OFF | 1 | NORMAL | 2 | FULL</i><b>;</b></p>

    <p>Query or change the setting of the "synchronous" flag.)^