1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>db get_join</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB TCL API Reference" /> 10 <link rel="up" href="tclapi.html" title="Chapter��1.�� Berkeley DB Tcl APIs" /> 11 <link rel="prev" href="db_get.html" title="db get" /> 12 <link rel="next" href="db_get_type.html" title="db get_type" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center"><span class="emphasis"><em>db</em></span> get_join</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="db_get.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��1.�� 23 Berkeley DB Tcl APIs 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="db_get_type.html">Next</a></td> 26 </tr> 27 </table> 28 <hr /> 29 </div> 30 <div class="sect1" lang="en" xml:lang="en"> 31 <div class="titlepage"> 32 <div> 33 <div> 34 <h2 class="title" style="clear: both"><a id="db_get_join"></a><span class="emphasis"><em>db</em></span> get_join</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">db get_join 39 [-txn txnid] 40 {<span class="emphasis"><em>db</em></span> key} 41 {<span class="emphasis"><em>db</em></span> key} 42 ... </pre> 43 <p> 44 The <span class="emphasis"><em>db</em></span> <span class="bold"><strong>get_join</strong></span> 45 command performs the cursor operations required to join the specified 46 keys and returns a list of joined {key data} pairs. 47 See <a href="../../programmer_reference/am_cursor.html#am_join" class="olink">Equality Join</a> 48 in the <em class="citetitle">Berkeley DB Programmer's Reference Guide</em> for more 49 information on the underlying requirements for joining. 50 </p> 51 <p> 52 The options are as follows: 53 </p> 54 <div class="itemizedlist"> 55 <ul type="disc"> 56 <li> 57 <p> 58 <span class="bold"><strong>-txn txnid</strong></span> 59 </p> 60 <p> 61 If the operation is part of an application-specified transaction, the 62 <span class="bold"><strong>txnid</strong></span> parameter is a transaction 63 handle returned from <span class="emphasis"><em>env</em></span> <span class="bold"><strong>txn</strong></span>. If no transaction handle is specified, 64 but the operation occurs in a transactional database, the operation 65 will be implicitly transaction protected. 66 </p> 67 </li> 68 </ul> 69 </div> 70 <p> 71 In the case of error, a Tcl error is thrown. 72 </p> 73 </div> 74 <div class="navfooter"> 75 <hr /> 76 <table width="100%" summary="Navigation footer"> 77 <tr> 78 <td width="40%" align="left"><a accesskey="p" href="db_get.html">Prev</a>��</td> 79 <td width="20%" align="center"> 80 <a accesskey="u" href="tclapi.html">Up</a> 81 </td> 82 <td width="40%" align="right">��<a accesskey="n" href="db_get_type.html">Next</a></td> 83 </tr> 84 <tr> 85 <td width="40%" align="left" valign="top"><span class="emphasis"><em>db</em></span> get��</td> 86 <td width="20%" align="center"> 87 <a accesskey="h" href="index.html">Home</a> 88 </td> 89 <td width="40%" align="right" valign="top">��<span class="emphasis"><em>db</em></span> get_type</td> 90 </tr> 91 </table> 92 </div> 93 </body> 94</html> 95