003 File Manager
Current Path:
/usr/local/share/doc/db5/gsg_txn/CXX
usr
/
local
/
share
/
doc
/
db5
/
gsg_txn
/
CXX
/
📁
..
📄
BerkeleyDB-Core-Cxx-Txn.pdf
(1007.21 KB)
📄
abortresults.html
(3.37 KB)
📄
apireq.html
(8.15 KB)
📄
architectrecovery.html
(25.01 KB)
📄
autocommit.html
(7.71 KB)
📄
backuprestore.html
(18.35 KB)
📄
blocking_deadlocks.html
(32.31 KB)
📄
deadlock.jpg
(12.3 KB)
📄
enabletxn.html
(45 KB)
📄
envopen.html
(7.22 KB)
📄
exclusivelock.html
(4.61 KB)
📄
filemanagement.html
(14.08 KB)
📄
gettingStarted.css
(1.13 KB)
📄
hotfailover.html
(8.94 KB)
📄
index.html
(18.38 KB)
📄
inmem_txnexample_c.html
(21.47 KB)
📄
introduction.html
(8.39 KB)
📄
isolation.html
(32.43 KB)
📄
lockingsubsystem.html
(25.48 KB)
📄
logconfig.html
(17.96 KB)
📄
logfileremoval.html
(8.78 KB)
📄
maxtxns.html
(9.02 KB)
📄
moreinfo.html
(6.36 KB)
📄
multithread-intro.html
(4.45 KB)
📄
nestedtxn.html
(5.97 KB)
📄
nodurabletxn.html
(7.83 KB)
📄
perftune-intro.html
(4.01 KB)
📄
preface.html
(6.63 KB)
📄
readblock.jpg
(10.26 KB)
📄
readmodifywrite.html
(4.85 KB)
📄
recovery-intro.html
(4.7 KB)
📄
recovery.html
(11.66 KB)
📄
reversesplit.html
(6.29 KB)
📄
rwlocks1-pdf.jpg
(187.63 KB)
📄
rwlocks1.jpg
(7.25 KB)
📄
simplelock-pdf.jpg
(126.26 KB)
📄
simplelock.jpg
(4.35 KB)
📄
sysfailure.html
(5.7 KB)
📄
txn_ccursor.html
(7.34 KB)
📄
txnconcurrency.html
(13.8 KB)
📄
txncursor.html
(4.68 KB)
📄
txnexample_c.html
(27.19 KB)
📄
txnindices.html
(5.22 KB)
📄
txnnowait.html
(3.48 KB)
📄
usingtxns.html
(15.01 KB)
📄
wrapup.html
(10.26 KB)
📄
writeblock.jpg
(6.22 KB)
Editing: txnindices.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>Secondary Indices with Transaction Applications</title> <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Getting Started with Berkeley DB Transaction Processing" /> <link rel="up" href="usingtxns.html" title="Chapter 3. Transaction Basics" /> <link rel="prev" href="txncursor.html" title="Transactional Cursors" /> <link rel="next" href="maxtxns.html" title="Configuring the Transaction Subsystem" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 11.2.5.3</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Secondary Indices with Transaction Applications</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="txncursor.html">Prev</a> </td> <th width="60%" align="center">Chapter 3. Transaction Basics</th> <td width="20%" align="right"> <a accesskey="n" href="maxtxns.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="txnindices"></a>Secondary Indices with Transaction Applications</h2> </div> </div> </div> <p> You can use transactions with your secondary indices so long as you <span> open the secondary index so that it supports transactions (that is, you wrap the database open in a transaction, or use auto commit, in the same way as when you open a primary transactional database). </span> <span> In addition, you must make sure that when you associate the secondary index with the primary database, the association is performed using a transaction. The easiest thing to do here is to simply specify <code class="literal">DB_AUTO_COMMIT</code> when you perform the association. </span> </p> <p> All other aspects of using secondary indices with transactions are identical to using secondary indices without transactions. In addition, transaction-protecting <span> cursors opened against secondary indices is performed in exactly the same way as when you use transactional cursors against a primary database. </span> See <a class="xref" href="txncursor.html" title="Transactional Cursors">Transactional Cursors</a> for details. </p> <p> Note that when you use transactions to protect your database writes, your secondary indices are protected from corruption because updates to the primary and the secondaries are performed in a single atomic transaction. </p> <p> For example: </p> <pre class="programlisting">#include <db_cxx.h> ... // Environment and primary database open omitted ... Db my_index(&envp, 0); // Secondary // Open the secondary my_index.open(NULL, // Transaction pointer "my_secondary.db", // On-disk file that holds the database. NULL, // Optional logical database name DB_BTREE, // Database access method DB_AUTO_COMMIT, // Open flags. 0); // File mode (using defaults) // Now associate the primary and the secondary my_database.associate(NULL, // Txn id &my_index, // Associated secondary database get_sales_rep, // Callback used for key // extraction. This is described // in the Getting Started guide. DB_AUTO_COMMIT); // Flags </pre> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="txncursor.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="usingtxns.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="maxtxns.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Transactional Cursors </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Configuring the Transaction Subsystem</td> </tr> </table> </div> </body> </html>
Upload File
Create Folder
