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<a href="../session/intro.html"><h2>Session Module C Interface</h2></a><h2>Concatenate Two Changeset Objects</h2><blockquote><pre>int sqlite3changeset_concat(
int nA, /* Number of bytes in buffer pA */
void *pA, /* Pointer to buffer containing changeset A */
int nB, /* Number of bytes in buffer pB */
void *pB, /* Pointer to buffer containing changeset B */
int *pnOut, /* OUT: Number of bytes in output changeset */
void **ppOut /* OUT: Buffer containing output changeset */
);
</pre></blockquote><p>
This function is used to concatenate two changesets, A and B, into a
single changeset. The result is a changeset equivalent to applying
changeset A followed by changeset B. </p>
<p>This function combines the two input changesets using an
sqlite3_changegroup object. Calling it produces similar results as the
following code fragment:</p>
<p><pre>
sqlite3_changegroup *pGrp;
rc = sqlite3_changegroup_new(&pGrp);
if( rc==SQLITE_OK ) rc = sqlite3changegroup_add(pGrp, nA, pA);
if( rc==SQLITE_OK ) rc = sqlite3changegroup_add(pGrp, nB, pB);
if( rc==SQLITE_OK ){
rc = sqlite3changegroup_output(pGrp, pnOut, ppOut);
}else{
*ppOut = 0;
*pnOut = 0;
}
</pre></p>
<p>Refer to the sqlite3_changegroup documentation below for details.
</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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