public BigDecimal getBigDecimal(int columnIndex) throws SQLException {
        checkState();

        return rs.getBigDecimal(columnIndex);
    }
Gets the value of the designated column in the current row
of this rowset's <code>ResultSet</code> object as a
<code>java.math.BigDecimal</code> with full precision.

@param columnIndex the first column is 1, the second is 2, and so on
@return the column value (full precision);
if the value is SQL <code>NULL</code>, the value returned is
<code>null</code>.
@throws SQLException if a database access error occurs
           or this rowset does not currently have a valid
           connection, prepared statement, and result set
src/main/java/org/replicadb/rowset/sun/rowset/JdbcRowSetImpl.java