can't figure out how to implement the where clause

<?php
session_start();

if(!isset($_SESSION['id'])){
	header("location:login.php");
      }else{
      $id = $_SESSION['id']; 
}
//echo "$id";

require 'connections/class.eyemysqladap.inc.php';
require 'connections/class.eyedatagridPORTFOLIO.inc.php';

$db = new EyeMySQLAdap('host', 'user', 'password', 'name');
$x = new EyeDataGrid($db);

// Set the query
$x->setQuery("Symbol,Full_Name,Industry,Affiliation,Current_Value,Movement,id", "portfolio");

// Hide ID Column
$x->hideColumn('id');

// Allows filters
$x->allowFilters();

// Change column type
$x->setColumnType('Symbol', EyeDataGrid::TYPE_HREF);
$x->setColumnType('Industry', EyeDataGrid::TYPE_IMAGE);

?>

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<?php

 * EyeDataGrid
 * Provides datagrid control features
 * @link       http://www.eyesis.ca/projects/datagrid.html


class EyeDataGrid
{
	private $primary = ''; // Tables primary key column
	private $query; // SQL query
	private $hidden = array(); // Hidden columns
	private $type = array(); // Column types
	private $controls = array(); // Row controls, std or custom
	private $order = false; // Current order
	private $filter = false; // Current filter
	private $limit = true; // Current limit
	private $_db, $result; // Database related
	private $select_fields = ''; // Field used to select
	private $select_where = ''; // Where clause
	private $select_table = ''; // Table to read

	/**
	 * Set the SELECT query
	 *
	 * @param string $fields Feilds to fetch from table. * for all columns
	 * @param string $table Table to select from
	 * @param string $primay Optional primary key column
	 * @param string $where Optional where condition
	 */
	public function setQuery($fields, $table, $primary = '', $where = '')
	{
		$this->primary = $primary;

		$this->select_fields = $fields;
		$this->select_table = $table;
		$this->select_where = $where;
	}

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