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