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<a href="../session/intro.html"><h2>Session Module C Interface</h2></a><h2>Constants Returned By The Conflict Handler</h2><blockquote><pre>#define SQLITE_CHANGESET_OMIT 0
#define SQLITE_CHANGESET_REPLACE 1
#define SQLITE_CHANGESET_ABORT 2
</pre></blockquote><p>
A conflict handler callback must return one of the following three values.</p>
<p><dl>
<dt>SQLITE_CHANGESET_OMIT<dd>
If a conflict handler returns this value no special action is taken. The
change that caused the conflict is not applied. The session module
continues to the next change in the changeset.</p>
<p><dt>SQLITE_CHANGESET_REPLACE<dd>
This value may only be returned if the second argument to the conflict
handler was SQLITE_CHANGESET_DATA or SQLITE_CHANGESET_CONFLICT. If this
is not the case, any changes applied so far are rolled back and the
call to sqlite3changeset_apply() returns SQLITE_MISUSE.</p>
<p> If CHANGESET_REPLACE is returned by an SQLITE_CHANGESET_DATA conflict
handler, then the conflicting row is either updated or deleted, depending
on the type of change.</p>
<p> If CHANGESET_REPLACE is returned by an SQLITE_CHANGESET_CONFLICT conflict
handler, then the conflicting row is removed from the database and a
second attempt to apply the change is made. If this second attempt fails,
the original row is restored to the database before continuing.</p>
<p><dt>SQLITE_CHANGESET_ABORT<dd>
If this value is returned, any changes applied so far are rolled back
and the call to sqlite3changeset_apply() returns SQLITE_ABORT.
</dl>
</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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