jodd-db/src/main/java/jodd/db/DbQuery.java
public Q clearParameters() {
		init();
		if (preparedStatement == null) {
			return _this();
		}
		try {
			preparedStatement.clearParameters();
		} catch (SQLException sex) {
			throw new DbSqlException(sex);
		}
		return _this();
	}
public Q clearParameters() {
		init();
		if (preparedStatement == null) {
			return _this();
		}
		try {
			preparedStatement.clearParameters();
		} catch (SQLException sex) {
			throw new DbSqlException(sex);
		}
		return _this();
	}
Clears the current parameter values immediately.
<p>
In general, parameter values remain in force for repeated use of a
statement. Setting a parameter value automatically clears its
previous value. However, in some cases it is useful to immediately
release the resources used by the current parameter values; this can
be done by calling the method <code>clearParameters</code>.