public void updateShort(String columnName, short x) throws SQLException {
        updateShort(findColumn(columnName), x);
    }
Updates the designated column with a <code>short</code> value.
The <code>updateXXX</code> methods are used to update column values in the
current row or the insert row.  The <code>updateXXX</code> methods do not
update the underlying database; instead the <code>updateRow</code> or
<code>insertRow</code> methods are called to update the database.

@param columnName the name of the column
@param x the new column value
@throws SQLException if a database access error occurs
src/main/java/org/replicadb/rowset/sun/rowset/JdbcRowSetImpl.java