124 lines
4.6 KiB
HTML
124 lines
4.6 KiB
HTML
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<title>Obtain A Composite Changeset From A Changegroup</title>
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<a href="intro.html"><h2>Session Module C Interface</h2></a><h2>Obtain A Composite Changeset From A Changegroup</h2><blockquote><pre>int sqlite3changegroup_output(
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sqlite3_changegroup*,
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int *pnData, /* OUT: Size of output buffer in bytes */
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void **ppData /* OUT: Pointer to output buffer */
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);
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</pre></blockquote><p>
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Obtain a buffer containing a changeset (or patchset) representing the
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current contents of the changegroup. If the inputs to the changegroup
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were themselves changesets, the output is a changeset. Or, if the
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inputs were patchsets, the output is also a patchset.</p>
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<p>As with the output of the sqlite3session_changeset() and
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sqlite3session_patchset() functions, all changes related to a single
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table are grouped together in the output of this function. Tables appear
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in the same order as for the very first changeset added to the changegroup.
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If the second or subsequent changesets added to the changegroup contain
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changes for tables that do not appear in the first changeset, they are
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appended onto the end of the output changeset, again in the order in
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which they are first encountered.</p>
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<p>If an error occurs, an SQLite error code is returned and the output
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variables (*pnData) and (*ppData) are set to 0. Otherwise, SQLITE_OK
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is returned and the output variables are set to the size of and a
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pointer to the output buffer, respectively. In this case it is the
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responsibility of the caller to eventually free the buffer using a
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call to sqlite3_free().
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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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