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Access Method Wrapup
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<h2 class="title"><a id="am_misc"></a>Chapter 4.
Access Method Wrapup
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<span class="sect1">
<a href="am_misc.html#am_misc_align">Data alignment</a>
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<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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<a href="am_misc_bulk.html#am_misc_bulk_del">Bulk deletes</a>
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<a href="am_misc_partial.html">Partial record storage and retrieval</a>
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<a href="am_misc_struct.html">Storing C/C++ structures/objects</a>
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<a href="am_misc_perm.html">Retrieved key/data permanence for C/C++</a>
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<a href="am_misc_error.html">Error support</a>
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<a href="am_misc_stability.html">Cursor stability</a>
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<a href="am_misc_dbsizes.html">Database limits</a>
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<span class="sect1">
<a href="am_misc_tune.html">Access method tuning</a>
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<h2 class="title" style="clear: both"><a id="am_misc_align"></a>Data alignment</h2>
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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.</p>
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