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<h2 class="title"><a id="am_misc"></a>Chapter 4. Access Method Wrapup </h2>
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<p>
<b>Table of Contents</b>
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<dl>
<dt>
<span class="sect1">
<a href="am_misc.html#am_misc_align">Data alignment</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="am_misc_bulk.html">Retrieving and updating records in bulk</a>
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<span class="sect2">
<a href="am_misc_bulk.html#am_misc_bulk_get">Bulk retrieval</a>
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<span class="sect2">
<a href="am_misc_bulk.html#am_misc_bulk_put">Bulk updates</a>
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retrieval</a>
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<span class="sect1">
<a href="am_misc_struct.html">Storing C/C++
structures/objects</a>
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<span class="sect1">
<a href="am_misc_perm.html">Retrieved key/data permanence for C/C++</a>
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<span class="sect1">
<a href="am_misc_error.html">Error support</a>
</span>
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<span class="sect1">
<a href="am_misc_stability.html">Cursor stability</a>
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<span class="sect1">
<a href="am_misc_dbsizes.html">Database limits</a>
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<span class="sect2">
<a href="blobs.html#blob_create">Creating BLOBs</a>
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<span class="sect2">
<a href="blobs.html#blob_access">BLOB access</a>
</span>
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<dt>
<span class="sect2">
<a href="blobs.html#blob_storage">BLOB storage</a>
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<dt>
<span class="sect2">
<a href="blobs.html#blob_replication">BLOBs and Replication</a>
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<span class="sect1">
<a href="am_misc_db_sql.html">Specifying a Berkeley DB schema
using SQL DDL</a>
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<dt>
<span class="sect1">
<a href="am_misc_tune.html">Access method tuning</a>
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<span class="sect1">
<a href="am_misc_faq.html">Access method FAQ</a>
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<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
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<div>
<h2 class="title" style="clear: both"><a id="am_misc_align"></a>Data alignment</h2>
</div>
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<p>
The Berkeley DB access methods provide no guarantees about
byte alignment for returned key/data pairs, or callback
functions which take <a href="../api_reference/C/dbt.html" class="olink">DBT</a> references as arguments, and
applications are responsible for arranging any necessary
alignment. The <a href="../api_reference/C/dbt.html#dbt_DB_DBT_MALLOC" class="olink">DB_DBT_MALLOC</a>, <a href="../api_reference/C/dbt.html#dbt_DB_DBT_REALLOC" class="olink">DB_DBT_REALLOC</a>, and
<a href="../api_reference/C/dbt.html#dbt_DB_DBT_USERMEM" class="olink">DB_DBT_USERMEM</a> flags may be used to store returned items in
memory of arbitrary alignment.
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