function upgrade_3_3_beta1($rev)
 {
     $upgrade = new CRM_Upgrade_Form();
     $upgrade->processSQL($rev);
     // CRM-6902
     // Add column price_field_value_id in civicrm_line_item.
     // Do not drop option_group_id column now since we need it to
     // update line items.
     $updateLineItem1 = "ALTER TABLE civicrm_line_item ADD COLUMN price_field_value_id int(10) unsigned default NULL;";
     CRM_Core_DAO::executeQuery($updateLineItem1);
     $priceFieldDAO = new CRM_Price_DAO_Field();
     $priceFieldDAO->find();
     $ids = array();
     while ($priceFieldDAO->fetch()) {
         $opGroupDAO = new CRM_Core_DAO_OptionGroup();
         $opGroupDAO->name = 'civicrm_price_field.amount.' . $priceFieldDAO->id;
         if (!$opGroupDAO->find(TRUE)) {
             $opGroupDAO->free();
             continue;
         }
         $opValueDAO = new CRM_Core_DAO_OptionValue();
         $opValueDAO->option_group_id = $opGroupDAO->id;
         $opValueDAO->find();
         while ($opValueDAO->fetch()) {
             // FIX ME: not migrating description(?), there will
             // be a field description for each option.
             $fieldValue = array('price_field_id' => $priceFieldDAO->id, 'label' => $opValueDAO->label, 'name' => CRM_Utils_String::munge($opValueDAO->label, '_', 64), 'amount' => $opValueDAO->name, 'weight' => $opValueDAO->weight, 'is_default' => $opValueDAO->is_default, 'is_active' => $opValueDAO->is_active);
             if ($priceFieldDAO->count) {
                 // Migrate Participant Counts on option level.
                 // count of each option will be the same
                 // as earlier field count.
                 $fieldValue['count'] = $priceFieldDAO->count;
             }
             $fieldValueDAO = CRM_Price_BAO_FieldValue::add($fieldValue, $ids);
             $lineItemDAO = new CRM_Price_DAO_LineItem();
             $lineItemDAO->option_group_id = $opGroupDAO->id;
             $lineItemDAO->label = $opValueDAO->label;
             $lineItemDAO->unit_price = $opValueDAO->name;
             $labelFound = $priceFound = FALSE;
             // check with label and amount
             if (!$lineItemDAO->find(TRUE)) {
                 $lineItemDAO->free();
                 $lineItemDAO = new CRM_Price_DAO_LineItem();
                 $lineItemDAO->option_group_id = $opGroupDAO->id;
                 $lineItemDAO->label = $opValueDAO->label;
                 // check with label only
                 if ($lineItemDAO->find(TRUE)) {
                     $labelFound = TRUE;
                 }
             } else {
                 $labelFound = TRUE;
                 $priceFound = TRUE;
             }
             $lineItemDAO->free();
             // update civicrm_line_item for price_field_value_id.
             // Used query to avoid line by line update.
             if ($labelFound || $priceFound) {
                 $lineItemParams = array(1 => array($fieldValueDAO->id, 'Integer'), 2 => array($opValueDAO->label, 'String'));
                 $updateLineItems = "UPDATE civicrm_line_item SET price_field_value_id = %1 WHERE label = %2";
                 if ($priceFound) {
                     $lineItemParams[3] = array($opValueDAO->name, 'Float');
                     $updateLineItems .= " AND unit_price = %3";
                 }
                 CRM_Core_DAO::executeQuery($updateLineItems, $lineItemParams);
             }
         }
         $opGroupDAO->delete();
         $opValueDAO->free();
         $opGroupDAO->free();
     }
     $priceFieldDAO->free();
     // Now drop option_group_id column from civicrm_line_item
     $updateLineItem2 = "ALTER TABLE civicrm_line_item DROP option_group_id,\n                           ADD CONSTRAINT `FK_civicrm_price_field_value_id` FOREIGN KEY (price_field_value_id) REFERENCES civicrm_price_field_value(id) ON DELETE SET NULL;";
     CRM_Core_DAO::executeQuery($updateLineItem2, array(), TRUE, NULL, FALSE, FALSE);
     $updatePriceField = "ALTER TABLE civicrm_price_field DROP count";
     CRM_Core_DAO::executeQuery($updatePriceField, array(), TRUE, NULL, FALSE, FALSE);
     // as the table 'civicrm_price_field' is localised and column 'count' is dropped
     // after the views are rebuild, we need to rebuild views to avoid invalid refrence of table.
     if ($upgrade->multilingual) {
         CRM_Core_I18n_Schema::rebuildMultilingualSchema($upgrade->locales, $rev);
     }
 }