127 lines
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HTML
127 lines
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HTML
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<a href="intro.html"><h2>Session Module C Interface</h2></a><h2>Obtain new.* Values From A Changeset Iterator</h2><blockquote><pre>int sqlite3changeset_new(
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sqlite3_changeset_iter *pIter, /* Changeset iterator */
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int iVal, /* Column number */
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sqlite3_value **ppValue /* OUT: New value (or NULL pointer) */
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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 SQLITE_ROW.
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Furthermore, it may only be called if the type of change that the iterator
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currently points to is either <a href="../c3ref/c_alter_table.html">SQLITE_UPDATE</a> or <a href="../c3ref/c_alter_table.html">SQLITE_INSERT</a>. Otherwise,
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this function returns <a href="../rescode.html#misuse">SQLITE_MISUSE</a> and sets *ppValue to NULL.</p>
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<p>Argument iVal must be greater than or equal to 0, and less than the number
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of columns in the table affected by the current change. Otherwise,
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<a href="../rescode.html#range">SQLITE_RANGE</a> is returned and *ppValue is set to NULL.</p>
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<p>If successful, this function sets *ppValue to point to a protected
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sqlite3_value object containing the iVal'th value from the vector of
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new row values stored as part of the UPDATE or INSERT change and
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returns SQLITE_OK. If the change is an UPDATE and does not include
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a new value for the requested column, *ppValue is set to NULL and
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SQLITE_OK returned. The name of the function comes from the fact that
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this is similar to the "new.*" columns available to update or delete
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triggers.</p>
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<p>If some other error occurs (e.g. an OOM condition), an SQLite error code
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is returned and *ppValue is set to NULL.
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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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