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