128 lines
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HTML
128 lines
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HTML
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<a href="intro.html"><h2>Session Module C Interface</h2></a><h2>Obtain The Current Operation From A Changeset Iterator</h2><blockquote><pre>int sqlite3changeset_op(
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sqlite3_changeset_iter *pIter, /* Iterator object */
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const char **pzTab, /* OUT: Pointer to table name */
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int *pnCol, /* OUT: Number of columns in table */
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int *pOp, /* OUT: SQLITE_INSERT, DELETE or UPDATE */
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int *pbIndirect /* OUT: True for an 'indirect' change */
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);
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</pre></blockquote><p>
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The pIter argument passed to this function may either be an iterator
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passed to a conflict-handler by <a href="../session/sqlite3changeset_apply.html">sqlite3changeset_apply()</a>, or an iterator
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created by <a href="../session/sqlite3changeset_start.html">sqlite3changeset_start()</a>. In the latter case, the most recent
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call to <a href="../session/sqlite3changeset_next.html">sqlite3changeset_next()</a> must have returned <a href="../rescode.html#row">SQLITE_ROW</a>. If this
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is not the case, this function returns <a href="../rescode.html#misuse">SQLITE_MISUSE</a>.</p>
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<p>If argument pzTab is not NULL, then *pzTab is set to point to a
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nul-terminated utf-8 encoded string containing the name of the table
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affected by the current change. The buffer remains valid until either
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sqlite3changeset_next() is called on the iterator or until the
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conflict-handler function returns. If pnCol is not NULL, then *pnCol is
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set to the number of columns in the table affected by the change. If
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pbIndirect is not NULL, then *pbIndirect is set to true (1) if the change
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is an indirect change, or false (0) otherwise. See the documentation for
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<a href="../session/sqlite3session_indirect.html">sqlite3session_indirect()</a> for a description of direct and indirect
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changes. Finally, if pOp is not NULL, then *pOp is set to one of
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<a href="../c3ref/c_alter_table.html">SQLITE_INSERT</a>, <a href="../c3ref/c_alter_table.html">SQLITE_DELETE</a> or <a href="../c3ref/c_alter_table.html">SQLITE_UPDATE</a>, depending on the
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type of change that the iterator currently points to.</p>
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<p>If no error occurs, SQLITE_OK is returned. If an error does occur, an
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SQLite error code is returned. The values of the output variables may not
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be trusted in this case.
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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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