mirror of
https://github.com/yasuhirokimura/db18
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Yasuhiro KIMURA
98 lines
4.1 KiB
HTML
98 lines
4.1 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>db get_join</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB TCL API Reference" />
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<link rel="up" href="tclapi.html" title="Chapter 1. Berkeley DB Tcl APIs" />
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<link rel="prev" href="db_get.html" title="db get" />
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<link rel="next" href="db_get_type.html" title="db get_type" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 18.1.40</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center"><span xmlns="http://www.w3.org/1999/xhtml" class="emphasis"><em>db</em></span> get_join</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="db_get.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 1.
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Berkeley DB Tcl APIs
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="db_get_type.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="db_get_join"></a><span class="emphasis"><em>db</em></span> get_join</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">db get_join
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[-txn txnid]
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{<span class="emphasis"><em>db</em></span> key}
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{<span class="emphasis"><em>db</em></span> key}
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... </pre>
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<p>
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The <span class="emphasis"><em>db</em></span> <span class="bold"><strong>get_join</strong></span>
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command performs the cursor operations required to join the specified
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keys and returns a list of joined {key data} pairs.
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See <a href="../../programmer_reference/am_cursor.html#am_join" class="olink">Equality Join</a>
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in the <em class="citetitle">Berkeley DB Programmer's Reference Guide</em> for more
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information on the underlying requirements for joining.
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</p>
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<p>
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The options are as follows:
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</p>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<p>
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<span class="bold"><strong>-txn txnid</strong></span>
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</p>
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<p>
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If the operation is part of an application-specified transaction, the
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<span class="bold"><strong>txnid</strong></span> parameter is a transaction
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handle returned from <span class="emphasis"><em>env</em></span> <span class="bold"><strong>txn</strong></span>. If no transaction handle is specified,
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but the operation occurs in a transactional database, the operation
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will be implicitly transaction protected.
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</p>
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</li>
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</ul>
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</div>
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<p>
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In the case of error, a Tcl error is thrown.
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</p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="db_get.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="tclapi.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="db_get_type.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top"><span class="emphasis"><em>db</em></span> get </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> <span class="emphasis"><em>db</em></span> get_type</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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