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<!-- keywords: SQLITE_TXN_NONE SQLITE_TXN_READ SQLITE_TXN_WRITE {transaction state} -->
<div class=nosearch>
<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
<h2>Allowed return values from sqlite3_txn_state()</h2>
</div>
<blockquote><pre>
#define SQLITE_TXN_NONE 0
#define SQLITE_TXN_READ 1
#define SQLITE_TXN_WRITE 2
</pre></blockquote>
<p>
These constants define the current transaction state of a database file.
The <a href="../c3ref/txn_state.html">sqlite3_txn_state(D,S)</a> interface returns one of these
constants in order to describe the transaction state of schema S
in <a href="../c3ref/sqlite3.html">database connection</a> D.</p>
<p><dl>
<a name="sqlitetxnnone"></a>
<dt>SQLITE_TXN_NONE</dt>
<dd>The SQLITE_TXN_NONE state means that no transaction is currently
pending.</dd></p>
<p><a name="sqlitetxnread"></a>
<dt>SQLITE_TXN_READ</dt>
<dd>The SQLITE_TXN_READ state means that the database is currently
in a read transaction. Content has been read from the database file
but nothing in the database file has changed. The transaction state
will advanced to SQLITE_TXN_WRITE if any changes occur and there are
no other conflicting concurrent write transactions. The transaction
state will revert to SQLITE_TXN_NONE following a <a href="../lang_transaction.html">ROLLBACK</a> or
<a href="../lang_transaction.html">COMMIT</a>.</dd></p>
<p><a name="sqlitetxnwrite"></a>
<dt>SQLITE_TXN_WRITE</dt>
<dd>The SQLITE_TXN_WRITE state means that the database is currently
in a write transaction. Content has been written to the database file
but has not yet committed. The transaction state will change to
to SQLITE_TXN_NONE at the next <a href="../lang_transaction.html">ROLLBACK</a> or <a href="../lang_transaction.html">COMMIT</a>.</dd>
</p><p>See also lists of
<a href="../c3ref/objlist.html">Objects</a>,
<a href="../c3ref/constlist.html">Constants</a>, and
<a href="../c3ref/funclist.html">Functions</a>.</p>
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