/usr/share/doc/python-apsw/html/dbapi.html is in python-apsw-doc 3.8.2-r1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>DBAPI notes — APSW 3.8.2-r1 documentation</title>
<link rel="stylesheet" href="_static/default.css" type="text/css" />
<link rel="stylesheet" href="_static/pygments.css" type="text/css" />
<script type="text/javascript">
var DOCUMENTATION_OPTIONS = {
URL_ROOT: '',
VERSION: '3.8.2-r1',
COLLAPSE_INDEX: false,
FILE_SUFFIX: '.html',
HAS_SOURCE: true
};
</script>
<script type="text/javascript" src="_static/jquery.js"></script>
<script type="text/javascript" src="_static/underscore.js"></script>
<script type="text/javascript" src="_static/doctools.js"></script>
<link rel="copyright" title="Copyright" href="copyright.html" />
<link rel="top" title="APSW 3.8.2-r1 documentation" href="index.html" />
<link rel="next" title="pysqlite differences" href="pysqlite.html" />
<link rel="prev" title="Execution and tracing" href="execution.html" />
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-26815066-1']);
_gaq.push(['_trackPageview']);
</script>
</head>
<body>
<div class="related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="right" >
<a href="pysqlite.html" title="pysqlite differences"
accesskey="N">next</a> |</li>
<li class="right" >
<a href="execution.html" title="Execution and tracing"
accesskey="P">previous</a> |</li>
<li><a href="index.html">APSW 3.8.2-r1 documentation</a> »</li>
</ul>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body">
<div class="section" id="dbapi-notes">
<span id="dbapinotes"></span><h1>DBAPI notes<a class="headerlink" href="#dbapi-notes" title="Permalink to this headline">¶</a></h1>
<p>DBAPI is defined in <span class="target" id="index-0"></span><a class="pep reference external" href="http://www.python.org/dev/peps/pep-0249"><strong>PEP 249</strong></a>. This section desribes how APSW complies or differs from it.</p>
<div class="section" id="module-interface">
<h2>Module Interface<a class="headerlink" href="#module-interface" title="Permalink to this headline">¶</a></h2>
<p>There is no connect method. Use the <a class="reference internal" href="connection.html#apsw.Connection" title="apsw.Connection"><tt class="xref py py-class docutils literal"><span class="pre">Connection</span></tt></a> constructor instead.</p>
<p>The Connection object and any cursors can be used in any thread. As
an extreme example, you could call <a class="reference internal" href="cursor.html#apsw.Cursor.next" title="apsw.Cursor.next"><tt class="xref py py-meth docutils literal"><span class="pre">Cursor.next()</span></tt></a> in seperate
threads each thread getting the next row. You cannot use the cursor
concurrently in multiple threads for example calling
<a class="reference internal" href="cursor.html#apsw.Cursor.execute" title="apsw.Cursor.execute"><tt class="xref py py-meth docutils literal"><span class="pre">Cursor.execute()</span></tt></a> at the same time. If you attempt to do so then
an <a class="reference internal" href="exceptions.html#apsw.ThreadingViolationError" title="apsw.ThreadingViolationError"><tt class="xref py py-exc docutils literal"><span class="pre">exception</span></tt></a> will be raised. The
Python Global Interpreter Lock (GIL) is released during all SQLite API
calls allowing for maximum concurrency.</p>
<p>Three different paramstyles are supported. Note that SQLite starts
parameter numbers from one not zero when using <em>qmark/numeric</em> style.</p>
<table border="1" class="docutils">
<colgroup>
<col width="34%" />
<col width="66%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td>qmark</td>
<td><tt class="docutils literal"><span class="pre">...</span> <span class="pre">WHERE</span> <span class="pre">name=?</span></tt></td>
</tr>
<tr class="row-even"><td>numeric</td>
<td><tt class="docutils literal"><span class="pre">...</span> <span class="pre">WHERE</span> <span class="pre">name=?4</span></tt></td>
</tr>
<tr class="row-odd"><td>named</td>
<td><div class="first last line-block">
<div class="line"><tt class="docutils literal"><span class="pre">...</span> <span class="pre">WHERE</span> <span class="pre">name=:name</span></tt> or</div>
<div class="line"><tt class="docutils literal"><span class="pre">...</span> <span class="pre">WHERE</span> <span class="pre">name=$name</span></tt></div>
</div>
</td>
</tr>
</tbody>
</table>
<p>The DBAPI exceptions are not used. The <a class="reference internal" href="exceptions.html#exceptions"><em>exceptions</em></a>
used correspond to specific SQLite error codes.</p>
</div>
<div class="section" id="connection-objects">
<h2>Connection Objects<a class="headerlink" href="#connection-objects" title="Permalink to this headline">¶</a></h2>
<p>There are no commit or rollback methods. You should use
<a class="reference internal" href="cursor.html#apsw.Cursor.execute" title="apsw.Cursor.execute"><tt class="xref py py-meth docutils literal"><span class="pre">Cursor.execute()</span></tt></a> with <cite>BEGIN</cite> and <cite>COMMIT</cite> or <cite>ROLLBACK</cite> as
appropriate. The <a class="reference external" href="https://sqlite.org/lockingv3.html">SQLite documentation</a> has more details. In
particular note that SQLite does not support nested transactions. You
can only start one transaction and will get an error if you try to
start another one.</p>
<p>Several methods that are defined in DBAPI to be on the cursor are
instead on the Connection object, since this is where SQLite actually
stores the information. Doing operations in any other cursor attached
to the same Connection object does update their values, and this makes
you aware of that.</p>
</div>
<div class="section" id="cursor-objects">
<h2>Cursor Objects<a class="headerlink" href="#cursor-objects" title="Permalink to this headline">¶</a></h2>
<p>Use <a class="reference internal" href="cursor.html#apsw.Cursor.getdescription" title="apsw.Cursor.getdescription"><tt class="xref py py-meth docutils literal"><span class="pre">Cursor.getdescription()</span></tt></a> instead of description. This
information is only obtained on request.</p>
<p id="rowcount">There is no rowcount. Row counts don’t make sense in SQLite any way.
SQLite returns results one row at a time, not calculating the next
result row until you ask for it. Consequently getting a rowcount
would have to calculate all the result rows and would not reduce the
amount of effort needed.</p>
<p>callproc is not implemented as SQLite doesn’t support stored procedures.</p>
<p><a class="reference internal" href="cursor.html#apsw.Cursor.execute" title="apsw.Cursor.execute"><tt class="xref py py-meth docutils literal"><span class="pre">execute()</span></tt></a> returns the Cursor object and you can use it
as an iterator to get the results (if any).</p>
<p><a class="reference internal" href="cursor.html#apsw.Cursor.executemany" title="apsw.Cursor.executemany"><tt class="xref py py-meth docutils literal"><span class="pre">executemany()</span></tt></a> returns the Cursor object and you can use
it as an iterator to get the results (if any).</p>
<p>fetchone is not available. Use the cursor as an iterator, or call
<a class="reference internal" href="cursor.html#apsw.Cursor.next" title="apsw.Cursor.next"><tt class="xref py py-meth docutils literal"><span class="pre">next()</span></tt></a> to get the next row, or raises StopIteration when
there are no more results.</p>
<p>fetchmany is not available. Simply use the cursor as an iterator or
call <a class="reference internal" href="cursor.html#apsw.Cursor.next" title="apsw.Cursor.next"><tt class="xref py py-meth docutils literal"><span class="pre">next()</span></tt></a> for however many results you want.</p>
<p>fetchall is available, but not too useful. Simply use the cursor as an
iterator, call <a class="reference internal" href="cursor.html#apsw.Cursor.next" title="apsw.Cursor.next"><tt class="xref py py-meth docutils literal"><span class="pre">next()</span></tt></a>, or use list which is less typing:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nb">all</span><span class="o">=</span><span class="nb">list</span><span class="p">(</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s">"...."</span><span class="p">))</span>
</pre></div>
</div>
<p>nextset is not applicable or implemented.</p>
<p>arraysize is not available as fetchmany isn’t.</p>
<p>Neither setinputsizes or setoutputsize are applicable or implemented.</p>
</div>
<div class="section" id="type-objects">
<h2>Type objects<a class="headerlink" href="#type-objects" title="Permalink to this headline">¶</a></h2>
<p>None of the date or time methods are available since SQLite 3 does not
have a native date or time type. There are <a class="reference external" href="https://sqlite.org/lang_datefunc.html">functions</a> for
manipulating dates and time which are represented as strings or
<a class="reference external" href="http://en.wikipedia.org/wiki/Julian_day">Julian days</a> (floating
point number).</p>
<p>Use the standard Python buffer class for BLOBs in Python 2 and the
bytes type in Python 3.</p>
</div>
<div class="section" id="optional-db-api-extensions">
<h2>Optional DB API Extensions<a class="headerlink" href="#optional-db-api-extensions" title="Permalink to this headline">¶</a></h2>
<p>rownumber is not available.</p>
<p>Exception classes are not available as attributes of Connection but
instead are on the <a class="reference internal" href="apsw.html#module-apsw" title="apsw: Python access to SQLite database library"><tt class="xref py py-mod docutils literal"><span class="pre">apsw</span></tt></a> module. See <a class="reference internal" href="exceptions.html#exceptions"><em>Exceptions</em></a> for
more details.</p>
<p>Use <a class="reference internal" href="cursor.html#apsw.Cursor.getconnection" title="apsw.Cursor.getconnection"><tt class="xref py py-meth docutils literal"><span class="pre">Cursor.getconnection()</span></tt></a> to get the associated Connection
object from a cursor.</p>
<p>scroll and messages are not available.</p>
<p>The Cursor object supports the iterator protocol and this is the only
way of getting information back.</p>
<p>To get the last inserted row id, call
<a class="reference internal" href="connection.html#apsw.Connection.last_insert_rowid" title="apsw.Connection.last_insert_rowid"><tt class="xref py py-meth docutils literal"><span class="pre">Connection.last_insert_rowid()</span></tt></a>. That stores the id from the last
insert on any Cursor associated with the the Connection. You can also
add <a class="reference external" href="https://sqlite.org/lang_corefunc.html">select last_insert_rowid()</a> to the end of your execute
statements:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">for</span> <span class="n">row</span> <span class="ow">in</span> <span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s">"BEGIN; INSERT ... ; INSERT ... ; SELECT last_insert_rowid(); COMMIT"</span><span class="p">):</span>
<span class="n">lastrowid</span><span class="o">=</span><span class="n">row</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
</pre></div>
</div>
<p>There is no errorhandler attribute.</p>
</div>
</div>
</div>
</div>
</div>
<div class="sphinxsidebar">
<div class="sphinxsidebarwrapper">
<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">DBAPI notes</a><ul>
<li><a class="reference internal" href="#module-interface">Module Interface</a></li>
<li><a class="reference internal" href="#connection-objects">Connection Objects</a></li>
<li><a class="reference internal" href="#cursor-objects">Cursor Objects</a></li>
<li><a class="reference internal" href="#type-objects">Type objects</a></li>
<li><a class="reference internal" href="#optional-db-api-extensions">Optional DB API Extensions</a></li>
</ul>
</li>
</ul>
<h4>Previous topic</h4>
<p class="topless"><a href="execution.html"
title="previous chapter">Execution and tracing</a></p>
<h4>Next topic</h4>
<p class="topless"><a href="pysqlite.html"
title="next chapter">pysqlite differences</a></p>
<h3>This Page</h3>
<ul class="this-page-menu">
<li><a href="_sources/dbapi.txt"
rel="nofollow">Show Source</a></li>
</ul>
<div id="searchbox" style="display: none">
<h3>Quick search</h3>
<form class="search" action="search.html" method="get">
<input type="text" name="q" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
<p class="searchtip" style="font-size: 90%">
Enter search terms or a module, class or function name.
</p>
</div>
<script type="text/javascript">$('#searchbox').show(0);</script>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="right" >
<a href="pysqlite.html" title="pysqlite differences"
>next</a> |</li>
<li class="right" >
<a href="execution.html" title="Execution and tracing"
>previous</a> |</li>
<li><a href="index.html">APSW 3.8.2-r1 documentation</a> »</li>
</ul>
</div>
<div class="footer">
© <a href="copyright.html">Copyright</a> 2004-2013, Roger Binns <rogerb@rogerbinns.com>.
Last updated on Dec 08, 2013.
Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.1.3.
</div>
<div class="footer">This page uses <a href="http://analytics.google.com/">
Google Analytics</a> to collect statistics. You can disable it by blocking
the JavaScript coming from www.google-analytics.com.
<script type="text/javascript">
(function() {
var ga = document.createElement('script');
ga.src = ('https:' == document.location.protocol ?
'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
ga.setAttribute('async', 'true');
document.documentElement.firstChild.appendChild(ga);
})();
</script>
</div>
</body>
</html>
|