mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
94 lines
3.9 KiB
HTML
94 lines
3.9 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
|||
|
|
<!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>db cursor</title>
|
|||
|
|
<link rel="stylesheet" href="apiReference.css" type="text/css" />
|
|||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
|||
|
|
<link rel="start" href="index.html" title="Berkeley DB TCL API Reference" />
|
|||
|
|
<link rel="up" href="tclapi.html" title="Chapter 1. Berkeley DB Tcl APIs" />
|
|||
|
|
<link rel="prev" href="db_count.html" title="db count" />
|
|||
|
|
<link rel="next" href="db_del.html" title="db del" />
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div xmlns="" class="navheader">
|
|||
|
|
<div class="libver">
|
|||
|
|
<p>Library Version 11.2.5.2</p>
|
|||
|
|
</div>
|
|||
|
|
<table width="100%" summary="Navigation header">
|
|||
|
|
<tr>
|
|||
|
|
<th colspan="3" align="center"><span xmlns="http://www.w3.org/1999/xhtml" class="emphasis"><em>db</em></span> cursor</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="db_count.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 1.
|
|||
|
|
Berkeley DB Tcl APIs
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="db_del.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
<hr />
|
|||
|
|
</div>
|
|||
|
|
<div class="sect1" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h2 class="title" style="clear: both"><a id="db_cursor"></a><span class="emphasis"><em>db</em></span> cursor</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<pre class="programlisting">db cursor
|
|||
|
|
[-txn txnid] </pre>
|
|||
|
|
<p>
|
|||
|
|
The <span class="emphasis"><em>db</em></span> <span class="bold"><strong>cursor</strong></span>
|
|||
|
|
command creates a database cursor. The returned cursor handle is
|
|||
|
|
bound to a Tcl command of the form <span class="bold"><strong>dbN.cX</strong></span>, where X is an integer starting at 0
|
|||
|
|
(for example, db0.c0 and db0.c1). It is through this Tcl command that
|
|||
|
|
the script accesses the cursor methods.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The options are as follows:
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>-txn txnid</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
If the operation is part of an application-specified transaction, the
|
|||
|
|
<span class="bold"><strong>txnid</strong></span> parameter is a transaction
|
|||
|
|
handle returned from <span class="emphasis"><em>env</em></span> <span class="bold"><strong>txn</strong></span>. If no transaction handle is specified,
|
|||
|
|
but the operation occurs in a transactional database, the operation
|
|||
|
|
will be implicitly transaction protected.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
In the case of error, a Tcl error is thrown.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="navfooter">
|
|||
|
|
<hr />
|
|||
|
|
<table width="100%" summary="Navigation footer">
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left"><a accesskey="p" href="db_count.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="tclapi.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="db_del.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top"><span class="emphasis"><em>db</em></span> count </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> <span class="emphasis"><em>db</em></span> del</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|