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<a href="../session/intro.html"><h2>Session Module C Interface</h2></a><h2>Create A New Changegroup Object</h2><blockquote><pre>int sqlite3changegroup_new(sqlite3_changegroup **pp);
</pre></blockquote><p>
An sqlite3_changegroup object is used to combine two or more changesets
(or patchsets) into a single changeset (or patchset). A single changegroup
object may combine changesets or patchsets, but not both. The output is
always in the same format as the input.</p>
<p>If successful, this function returns SQLITE_OK and populates (*pp) with
a pointer to a new sqlite3_changegroup object before returning. The caller
should eventually free the returned object using a call to
sqlite3changegroup_delete(). If an error occurs, an SQLite error code
(i.e. SQLITE_NOMEM) is returned and *pp is set to NULL.</p>
<p>The usual usage pattern for an sqlite3_changegroup object is as follows:</p>
<p><ul>
<li> It is created using a call to sqlite3changegroup_new().</p>
<p> <li> Zero or more changesets (or patchsets) are added to the object
by calling sqlite3changegroup_add().</p>
<p> <li> The result of combining all input changesets together is obtained
by the application via a call to sqlite3changegroup_output().</p>
<p> <li> The object is deleted using a call to sqlite3changegroup_delete().
</ul></p>
<p>Any number of calls to add() and output() may be made between the calls to
new() and delete(), and in any order.</p>
<p>As well as the regular sqlite3changegroup_add() and
sqlite3changegroup_output() functions, also available are the streaming
versions sqlite3changegroup_add_strm() and sqlite3changegroup_output_strm().
</p><p>See also lists of
<a href="../session/objlist.html">Objects</a>,
<a href="../session/constlist.html">Constants</a>, and
<a href="../session/funclist.html">Functions</a>.</p>
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