Documentation Source Text

  set xrefChng($date) $nChng
  incr nChng
}

chng {2019-04-00 (3.28.0)} {
<li> Added the new [sqlite3_stmt_isexplain(S)] interface for determining
     whether or not a [prepared statement] is an [EXPLAIN].
<li> Enhanced [VACUUM INTO] so that it works for read-only databases.
<li> New query optimizations:
<ol type="a">
<li> Enable the [LIKE optimization] for cases when the ESCAPE keyword
     is present and [PRAGMA case_sensitive_like] is on.
<li> In queries that are driven by a [partial index], avoid unnecessary
     tests of the constraint named in the WHERE clause of the partial
     index, since we know that constraint must always be true.
</ol>
<li> Enhancements to the [TCL Interface]:
<ol type="a">
<li> Added the -returntype option to the [function method].
<li> Added the new [bind_fallback method].
</ol>
<li> Enhancements to the [CLI]:
<ol type="a">
<li> Added support for [bound parameters] and the [.parameter command].
<li> Fix the [file I/O functions|readfile()] function so that it returns
     an empty BLOB rather than throwing an out-of-memory error when
     reading an empty file.
<li> Fix the [file I/O functions|writefile()] function so that when it
     creates new directories along the path of a new file, it gives them
     umask permissions rather than the same permissions as the file.
<li> Change [--update option] in the [.archive command] so that it skips
     files that are already in the archive and are unchanged.  Add the
     new --insert option that works like --update used to work.
</ol>
<li> Added the [https://sqlite.org/src/file/ext/misc/fossildelta.c|fossildelta.c]
     extension that can create, apply, and deconstruct the 
 [https://fossil-scm.org/fossil/doc/trunk/www/delta_format.wiki|Fossil DVCS file delta format]
     that is used by the [RBU extension].
<li> The [fts3_tokenizer()] function is restricted to return only NULL
     values unless application-defined FTS3 tokenizers are enabled using
     the [sqlite3_db_config]([SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER])
     setting.
<li> Improved robustnessness against corrupt database files.
<li> Miscellaneous performance enhancements
<li> Established a Git mirror of the offical SQLite source tree. 
     The canonical sources for SQLite are maintained using the
     [https://fossil-scm.org/|Fossil DVCS] at [https://sqlite.org/src].
     The Git mirror can be seen at [https://github.com/sqlite/sqlite].
}

chng {2019-02-25 (3.27.2)} {
<li> Fix a bug in the IN operator that was introduced by an 
     attempted optimization in version 3.27.0. Ticket
     [https://www.sqlite.org/src/info/df46dfb631f75694|df46dfb631f75694]
<li> Fix a bug causing a crash when a [window function] is misused.  Ticket

change in the future.

<codeblock>
  <i>-- List contents of archive in current "main" db.</i>.
  .ar --list
</codeblock>

<tcl>hd_fragment {arinsup} {/--update option} {/--insert option}</tcl>
<h2> SQLite Archive Insert And Update Commands </h2>

<p> The --update and --insert commands work like --create command, except that 
they do not delete the current archive before commencing. New versions of
files silently replace existing files with the same names, but otherwise
the initial contents of the archive (if any) remain intact.

    }
    if {[regexp {^\*} $a]} {
      set visible 0
      set a [string range $a 1 end]
    } else {
      set visible 1
    }
    if {[regexp {^/--} $a]} {set a [string range $a 1 end]}
    regsub -all {[^a-zA-Z0-9_.#/ -]} $a {} kw
    if {[info exists glink($kw)]} {
      if {[info exists hd(aux)] && $glink($kw)==$hd(fn-aux)} {
        db eval {DELETE FROM keyword WHERE kw=$kw}
      } elseif {$override_flag==0} {
        puts stderr "WARNING: duplicate keyword \"$kw\" - $glink($kw) and $lurl"
      }