*/
public <OD> Where<T, ID> idEq(Dao<OD, ?> dataDao, OD data) throws SQLException {
if (idColumnName == null) {
throw new SQLException("Object has no id column specified");
}
addClause(new SimpleComparison(idColumnName, idFieldType, dataDao.extractId(data),
SimpleComparison.EQUAL_TO_OPERATION));
return this;
}