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<h2>SQLite Release 3.27.1 On 2019-02-08</h2><p><b>Prior changes from version 3.27.0 (2019-02-07):</b></p>
<p><ol class='lessindent'>
<li value='1'>Added the <a href="../lang_vacuum.html#vacuuminto">VACUUM INTO</a> command
<li>Issue an SQLITE_WARNING message on the <a href="../errlog.html">error log</a> if a
<a href="../quirks.html#dblquote">double-quoted string literal</a> is used.
<li>The <a href="../c3ref/expanded_sql.html">sqlite3_normalized_sql()</a> interface works on any prepared statement
created using <a href="../c3ref/prepare.html">sqlite3_prepare_v2()</a> or <a href="../c3ref/prepare.html">sqlite3_prepare_v3()</a>. It is no
longer necessary to use <a href="../c3ref/prepare.html">sqlite3_prepare_v3()</a> with <a href="../c3ref/c_prepare_normalize.html#sqlitepreparenormalize">SQLITE_PREPARE_NORMALIZE</a>
in order to use <a href="../c3ref/expanded_sql.html">sqlite3_normalized_sql()</a>.
<li>Added the remove_diacritics=2 option to <a href="../fts3.html">FTS3</a> and <a href="../fts5.html">FTS5</a>.
<li>Added the <a href="../c3ref/c_prepare_normalize.html#sqlitepreparenovtab">SQLITE_PREPARE_NO_VTAB</a> option to <a href="../c3ref/prepare.html">sqlite3_prepare_v3()</a>.
Use that option to prevent circular references to <a href="../vtab.html#xshadowname">shadow tables</a> from
causing resource leaks.
<li>Enhancements to the <a href="../c3ref/deserialize.html">sqlite3_deserialize()</a> interface:
<ol type="a">
<li> Add the <a href="../c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlsizelimit">SQLITE_FCNTL_SIZE_LIMIT</a> <a href="../c3ref/file_control.html">file-control</a> for
setting an upper bound on the size of the in-memory database created
by sqlite3_deserialize. The default upper bound is 1GiB, or whatever
alternative value is specified by
<a href="../c3ref/config.html">sqlite3_config</a>(<a href="../c3ref/c_config_covering_index_scan.html#sqliteconfigmemdbmaxsize">SQLITE_CONFIG_MEMDB_MAXSIZE</a>)
and/or <a href="../compile.html#memdb_default_maxsize">SQLITE_MEMDB_DEFAULT_MAXSIZE</a>.
<li> Honor the <a href="../c3ref/c_deserialize_freeonclose.html">SQLITE_DESERIALIZE_READONLY</a> flag, which was previously described
in the documentation, but was previously a no-op.
<li> Enhance the "deserialize" command of the <a href="../tclsqlite.html">TCL Interface</a> to give it
new "--maxsize N" and "--readonly BOOLEAN" options.
</ol>
<li>Enhancements to the <a href="../cli.html">CLI</a>, mostly to support testing and debugging
of the SQLite library itself:
<ol type="a">
<li> Add support for ".open --hexdb". The
"<a href="https://sqlite.org/src/doc/trunk/tool/dbtotxt.md">dbtotxt</a>" utility
program used to generate the text for the "hexdb" is added to the
source tree.
<li> Add support for the "--maxsize N" option on ".open --deserialize".
<li> Add the "--memtrace" command-line option, to show all memory allocations
and deallocations.
<li> Add the ".eqp trace" option on builds with SQLITE_DEBUG, to enable
bytecode program listing with indentation and
<a href="../pragma.html#pragma_vdbe_trace">PRAGMA vdbe_trace</a> all in one step.
<li> Add the ".progress" command for accessing
the <a href="../c3ref/progress_handler.html">sqlite3_progress_handler()</a> interface.
<li> Add the "--async" option to the ".backup" command.
<li> Add options "--expanded", "--normalized", "--plain", "--profile", "--row",
"--stmt", and "--close" to the ".trace" command.
</ol>
<li> Increased robustness against malicious SQL that is run against a
maliciously corrupted database.
<p><b>Bug fixes:</b>
<li>Do not use a partial index to do a table scan on an IN operator.
Ticket <a href="https://www.sqlite.org/src/info/1d958d90596593a774">1d958d90596593a774</a>.
<li>Fix the <a href="../optoverview.html#flattening">query flattener</a> so that it works on queries that contain
subqueries that use <a href="../windowfunctions.html">window functions</a>.
Ticket <a href="https://www.sqlite.org/src/info/f09fcd17810f65f717">709fcd17810f65f717</a>
<li>Ensure that ALTER TABLE modifies table and column names embedded in WITH
clauses that are part of views and triggers.
<li>Fix a parser bug that prevented the use of parentheses around table-valued
functions.
<li>Fix a problem with the <a href="../optoverview.html#or_opt">OR optimization</a> on <a href="../expridx.html">indexes on expressions</a>.
Ticket <a href="https://www.sqlite.org/src/info/d96eba87698a428c1d">d96eba87698a428c1d</a>.
<li>Fix a problem with the
<a href="../optoverview.html#leftjoinreduction">LEFT JOIN strength reduction optimization</a> in which the optimization
was being applied inappropriately due to an IS NOT NULL operator.
Ticket <a href="https://www.sqlite.org/src/info/5948e09b8c415bc45d">5948e09b8c415bc45d</a>.
<li>Fix the <a href="../lang_replace.html">REPLACE</a> command so that it is no longer able to sneak a
NULL value into a NOT NULL column even if the NOT NULL column has a default
value of NULL.
Ticket <a href="https://www.sqlite.org/src/info/e6f1f2e34dceeb1ed6">e6f1f2e34dceeb1ed6</a>
<li>Fix a problem with the use of <a href="../windowfunctions.html">window functions</a> used within
<a href="../lang_expr.html#cosub">correlated subqueries</a>.
Ticket <a href="https://www.sqlite.org/src/info/d0866b26f83e9c55e3">d0866b26f83e9c55e3</a>
<li>Fix the <a href="../lang_altertable.html#altertabmvcol">ALTER TABLE RENAME COLUMN</a> command so that it works for tables
that have redundant UNIQUE constraints.
Ticket <a href="https://www.sqlite.org/src/info/bc8d94f0fbd633fd9a">bc8d94f0fbd633fd9a</a>
<li>Fix a bug that caused <a href="../lang_corefunc.html#zeroblob">zeroblob</a> values to be truncated when inserted into
a table that uses an <a href="../expridx.html">expression index</a>.
Ticket <a href="https://www.sqlite.org/src/info/bb4bdb9f7f654b0bb9">bb4bdb9f7f654b0bb9</a>
</ol>
<p><b>Changes in this specific patch release, version 3.27.1 (2019-02-08):</b></p>
<p><ol class='lessindent'>
<li value='19'> Fix a bug in the query optimizer: an adverse interaction between
the <a href="../optoverview.html#or_opt">OR optimization</a> and the optimization that tries to use values
read directly from an <a href="../expridx.html">expression index</a> instead of recomputing the
expression.
Ticket <a href="https://www.sqlite.org/src/info/4e8e4857d32d401f">4e8e4857d32d401f</a>
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: 2019-02-08 13:17:39 0eca3dd3d38b31c92b49ca2d311128b74584714d9e7de895b1a6286ef959a1dd
<li>SHA3-256 for sqlite3.c: 11c14992660d5ac713ea8bea48dc5e6123f26bc8d3075fe5585d1a217d090233
</ol></p>
<p>A <a href="../changes.html">complete list of SQLite releases</a>
in a single page and a <a href="../chronology.html">chronology</a> are both also available.
A detailed history of every
check-in is available at
<a href="https://www.sqlite.org/src/timeline">
SQLite version control site</a>.</p>
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