public java.io.InputStream getAsciiStream(int columnIndex) throws SQLException {
       throw new UnsupportedOperationException();
    }
Retrieves the value of the designated column in the current row of this
<code>CachedRowSetImpl</code> object as a <code>java.io.InputStream</code>
object.

A column value can be retrieved as a stream of ASCII characters
and then read in chunks from the stream.  This method is particularly
suitable for retrieving large <code>LONGVARCHAR</code> values.  The JDBC
driver will do any necessary conversion from the database format into ASCII.

<P><B>Note:</B> All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a get method implicitly closes the stream. . Also, a
stream may return <code>0</code> for <code>CachedRowSetImpl.available()</code>
whether there is data available or not.

@param columnIndex the first column is <code>1</code>, the second
       is <code>2</code>, and so on; must be <code>1</code> or larger
       and equal to or less than the number of columns in this rowset
@return a Java input stream that delivers the database column value
        as a stream of one-byte ASCII characters.  If the value is SQL
        <code>NULL</code>, the result is <code>null</code>.
@throws SQLException if (1) the given column index is out of bounds,
(2) the cursor is not on one of this rowset's rows or its
insert row, or (3) the designated column does not store an
SQL <code>CHAR, VARCHAR</code>, <code><b>LONGVARCHAR</b></code>
<code>BINARY, VARBINARY</code> or <code>LONGVARBINARY</code> value. The
bold SQL type designates the recommended return types that this method is
used to retrieve.
@see #getAsciiStream(String)
src/main/java/org/replicadb/rowset/sun/rowset/internal/SyncResolverImpl.java