2011-09-13 17:44:24 +00:00
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<title>db_sequence_create</title>
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<link rel="up" href="seq.html" title="Chapter 11. The DB_SEQUENCE Handle" />
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<link rel="prev" href="seq.html" title="Chapter 11. The DB_SEQUENCE Handle" />
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<div class="libver">
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2012-11-14 21:35:20 +00:00
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<p>Library Version 11.2.5.3</p>
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2011-09-13 17:44:24 +00:00
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<table width="100%" summary="Navigation header">
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<th colspan="3" align="center">db_sequence_create</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="seq.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 11.
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The DB_SEQUENCE Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="seqclose.html">Next</a></td>
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="seqcreate"></a>db_sequence_create</h2>
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<pre class="programlisting">#include <db.h>
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int db_sequence_create(DB_SEQUENCE **seq, DB *db, u_int32_t flags); </pre>
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<p>
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Creates a sequence handle, which can then be opened with
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<a class="xref" href="seqopen.html" title="DB_SEQUENCE->open()">DB_SEQUENCE->open()</a>.
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</p>
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<p>
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<code class="classname">DB_SEQUENCE</code> handles are free-threaded if the
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<a class="link" href="seqopen.html#seqopen_DB_THREAD">DB_THREAD</a>
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flag is specified to the
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<a class="xref" href="seqopen.html" title="DB_SEQUENCE->open()">DB_SEQUENCE->open()</a>
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method when the sequence is opened. Once the
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<a class="xref" href="seqclose.html" title="DB_SEQUENCE->close()">DB_SEQUENCE->close()</a> or
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<a class="xref" href="seqremove.html" title="DB_SEQUENCE->remove()">DB_SEQUENCE->remove()</a>
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methods are called, the handle can not be accessed again, regardless
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of the method's return.
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</p>
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<p>
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Each handle opened on a sequence may maintain a separate cache of values which are
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returned to the application using the <a class="xref" href="seqget.html" title="DB_SEQUENCE->get()">DB_SEQUENCE->get()</a>
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method either singly or in groups
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depending on its <span class="bold"><strong>delta</strong></span> parameter.
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</p>
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<p>
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Calling the <a class="xref" href="seqclose.html" title="DB_SEQUENCE->close()">DB_SEQUENCE->close()</a>
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or <a class="xref" href="seqremove.html" title="DB_SEQUENCE->remove()">DB_SEQUENCE->remove()</a>
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methods discards this handle.
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</p>
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<p>
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<code class="function">db_sequence_create()</code> <span>
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<span>
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method returns a non-zero error value on failure and 0 on success.
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</span>
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</span>
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</p>
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<div class="sect2" 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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<h3 class="title"><a id="idp62454152"></a>Parameters</h3>
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</div>
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</div>
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</div>
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<div class="sect3" 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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<h4 class="title"><a id="idp62508456"></a>seq</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>seq</strong></span> parameter references the
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memory into which the returned structure pointer is stored.
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</p>
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</div>
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<div class="sect3" 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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<h4 class="title"><a id="idp62523520"></a>db</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>db</strong></span> parameter is an open database
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handle which holds the persistent data for the sequence. The database
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may be of any type, but must not have been configured to support
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duplicate data items.
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</p>
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</div>
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<div class="sect3" 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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<h4 class="title"><a id="idp62524040"></a>flags</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>flags</strong></span> parameter is
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currently unused, and must be set to 0.
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</p>
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</div>
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</div>
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<div class="sect2" 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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<h3 class="title"><a id="idp62529368"></a>Errors</h3>
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</div>
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</div>
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</div>
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<p>
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The <code class="methodname">db_sequence_create</code> <span>
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<span>
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method may fail and return one of the following non-zero errors:
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</span>
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</span>
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</p>
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<div class="sect3" 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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<h4 class="title"><a id="idp62534432"></a>EINVAL</h4>
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</div>
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</div>
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</div>
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<p>
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An invalid flag value or parameter was specified.
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</p>
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</div>
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</div>
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<div class="sect2" 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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<h3 class="title"><a id="idp62533096"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="seq.html" title="Chapter 11. The DB_SEQUENCE Handle">DB_SEQUENCE</a>
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</p>
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</div>
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<div class="sect2" 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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2012-11-14 21:35:20 +00:00
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<h3 class="title"><a id="idp62535768"></a>See Also</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="seq.html#seqlist" title="Sequences and Related Methods">Sequences and Related Methods</a>
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</p>
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<td width="40%" align="left" valign="top">Chapter 11.
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The DB_SEQUENCE Handle
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</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 width="40%" align="right" valign="top"> DB_SEQUENCE->close()</td>
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