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+<a href="../session/intro.html"><h2>Session Module C Interface</h2></a><h2>Constants Passed To The Conflict Handler</h2><blockquote><pre>#define SQLITE_CHANGESET_DATA 1
+#define SQLITE_CHANGESET_NOTFOUND 2
+#define SQLITE_CHANGESET_CONFLICT 3
+#define SQLITE_CHANGESET_CONSTRAINT 4
+#define SQLITE_CHANGESET_FOREIGN_KEY 5
+</pre></blockquote><p>
+Values that may be passed as the second argument to a conflict-handler.</p>
+
+<p><dl>
+<dt>SQLITE_CHANGESET_DATA<dd>
+ The conflict handler is invoked with CHANGESET_DATA as the second argument
+ when processing a DELETE or UPDATE change if a row with the required
+ PRIMARY KEY fields is present in the database, but one or more other
+ (non primary-key) fields modified by the update do not contain the
+ expected "before" values.</p>
+
+<p> The conflicting row, in this case, is the database row with the matching
+ primary key.</p>
+
+<p><dt>SQLITE_CHANGESET_NOTFOUND<dd>
+ The conflict handler is invoked with CHANGESET_NOTFOUND as the second
+ argument when processing a DELETE or UPDATE change if a row with the
+ required PRIMARY KEY fields is not present in the database.</p>
+
+<p> There is no conflicting row in this case. The results of invoking the
+ sqlite3changeset_conflict() API are undefined.</p>
+
+<p><dt>SQLITE_CHANGESET_CONFLICT<dd>
+ CHANGESET_CONFLICT is passed as the second argument to the conflict
+ handler while processing an INSERT change if the operation would result
+ in duplicate primary key values.</p>
+
+<p> The conflicting row in this case is the database row with the matching
+ primary key.</p>
+
+<p><dt>SQLITE_CHANGESET_FOREIGN_KEY<dd>
+ If foreign key handling is enabled, and applying a changeset leaves the
+ database in a state containing foreign key violations, the conflict
+ handler is invoked with CHANGESET_FOREIGN_KEY as the second argument
+ exactly once before the changeset is committed. If the conflict handler
+ returns CHANGESET_OMIT, the changes, including those that caused the
+ foreign key constraint violation, are committed. Or, if it returns
+ CHANGESET_ABORT, the changeset is rolled back.</p>
+
+<p> No current or conflicting row information is provided. The only function
+ it is possible to call on the supplied sqlite3_changeset_iter handle
+ is sqlite3changeset_fk_conflicts().</p>
+
+<p><dt>SQLITE_CHANGESET_CONSTRAINT<dd>
+ If any other constraint violation occurs while applying a change (i.e.
+ a UNIQUE, CHECK or NOT NULL constraint), the conflict handler is
+ invoked with CHANGESET_CONSTRAINT as the second argument.</p>
+
+<p> There is no conflicting row in this case. The results of invoking the
+ sqlite3changeset_conflict() API are undefined.</p>
+
+<p></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>
+