public java.sql.Timestamp getTimestamp(String columnName, Calendar cal) throws SQLException {
      return getTimestamp(getColIdxByName(columnName), cal);
   }
Retrieves the value of the designated column in the current row
of this <code>StreamingRowSetImpl</code> object as a
<code>java.sql.Timestamp</code> object, using the given
<code>Calendar</code> object to construct an appropriate
millisecond value for the date.

@param columnName a <code>String</code> object that must match the
       SQL name of a column in this rowset, ignoring case
@param cal the <code>java.util.Calendar</code> object to use in
           constructing the date
@return the column value; if the value is SQL <code>NULL</code>,
        the result is <code>null</code>
@throws SQLException if (1) the given column name is not the name of
           a column in this rowset, (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>DATE</code>,
           <code>TIME</code>, or <code>TIMESTAMP</code> value
src/main/java/org/replicadb/rowset/StreamingRowSetImpl.java