worked on upgrade part CRM-12274

CRM/Upgrade/Incremental/php/FourFour.php

+<?php
+/*
+ +--------------------------------------------------------------------+
+ | CiviCRM version 4.3                                                |
+ +--------------------------------------------------------------------+
+ | Copyright CiviCRM LLC (c) 2004-2013                                |
+ +--------------------------------------------------------------------+
+ | This file is a part of CiviCRM.                                    |
+ |                                                                    |
+ | CiviCRM is free software; you can copy, modify, and distribute it  |
+ | under the terms of the GNU Affero General Public License           |
+ | Version 3, 19 November 2007.                                       |
+ |                                                                    |
+ | CiviCRM is distributed in the hope that it will be useful, but     |
+ | WITHOUT ANY WARRANTY; without even the implied warranty of         |
+ | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
+ | See the GNU Affero General Public License for more details.        |
+ |                                                                    |
+ | You should have received a copy of the GNU Affero General Public   |
+ | License along with this program; if not, contact CiviCRM LLC       |
+ | at info[AT]civicrm[DOT]org. If you have questions about the        |
+ | GNU Affero General Public License or the licensing of CiviCRM,     |
+ | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
+ +--------------------------------------------------------------------+
+*/
+
+/**
+ *
+ * @package CRM
+ * @copyright CiviCRM LLC (c) 2004-2013
+ * $Id$
+ *
+ */
+class CRM_Upgrade_Incremental_php_FourFour {
+  const BATCH_SIZE = 5000;
+
+  function verifyPreDBstate(&$errors) {
+    return TRUE;
+  }
+
+  /**
+   * Compute any messages which should be displayed beforeupgrade
+   *
+   * Note: This function is called iteratively for each upcoming
+   * revision to the database.
+   *
+   * @param $postUpgradeMessage string, alterable
+   * @param $rev string, a version number, e.g. '4.4.alpha1', '4.4.beta3', '4.4.0'
+   * @return void
+   */
+  function setPreUpgradeMessage(&$preUpgradeMessage, $rev, $currentVer = NULL) {
+  }
+
+  /**
+   * Compute any messages which should be displayed after upgrade
+   *
+   * @param $postUpgradeMessage string, alterable
+   * @param $rev string, an intermediate version; note that setPostUpgradeMessage is called repeatedly with different $revs
+   * @return void
+   */
+  function setPostUpgradeMessage(&$postUpgradeMessage, $rev) {
+  }
+
+  function upgrade_4_4_alpha1($rev) {
+    // task to process sql                                                         
+    $this->addTask(ts('Upgrade DB to 4.4.alpha1: SQL'), 'task_4_4_x_runSql', $rev);
+
+    // Consolidate activity contacts CRM-12274.
+    $this->addTask(ts('Consolidate activity contacts'), 'activityContacts');
+
+    return TRUE;
+  }
+
+  /**
+   * Update activity contacts CRM-12274
+   *
+   * @return bool TRUE for success
+   */
+  static function activityContacts(CRM_Queue_TaskContext $ctx) {
+    $upgrade = new CRM_Upgrade_Form();
+    $query = "
+CREATE TABLE IF NOT EXISTS `civicrm_activity_contact` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT 'Activity contact id',
+  `activity_id` int(10) unsigned NOT NULL COMMENT 'Foreign key to the activity for this record.',
+  `contact_id` int(10) unsigned NOT NULL COMMENT 'Foreign key to the contact for this record.',
+  `record_type` enum('Source','Assignee','Target') COLLATE utf8_unicode_ci DEFAULT NULL COMMENT 'The record type for this row',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `UI_activity_contact_id` (`contact_id`,`activity_id`,`record_type`),
+  KEY `FK_civicrm_activity_contact_activity_id` (`activity_id`)
+) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+";
+
+    $dao = CRM_Core_DAO::executeQuery($query);
+    
+    $query = " 
+INSERT INTO civicrm_activity_contact (activity_id, contact_id, record_type)
+SELECT      activity_id, target_contact_id, 'Target' as record_type
+FROM        civicrm_activity_target";
+
+    $dao = CRM_Core_DAO::executeQuery($query);
+
+    $query = "  
+INSERT INTO civicrm_activity_contact (activity_id, contact_id, record_type)
+SELECT      activity_id, assignee_contact_id, 'Assignee' as record_type
+FROM        civicrm_activity_assignment";
+    $dao = CRM_Core_DAO::executeQuery($query);
+    
+    $query = "
+  INSERT INTO civicrm_activity_contact (activity_id, contact_id, record_type)
+SELECT      id, source_contact_id, 'Source' as record_type
+FROM        civicrm_activity 
+WHERE       source_contact_id IS NOT NULL";
+
+    $dao = CRM_Core_DAO::executeQuery($query);
+
+   $query = "DROP TABLE civicrm_activity_target";
+   $dao = CRM_Core_DAO::executeQuery($query);
+
+   $query = "DROP TABLE civicrm_activity_assignment";
+   $dao = CRM_Core_DAO::executeQuery($query);
+
+   $query = "ALTER  TABLE civicrm_activity 
+     DROP FOREIGN KEY FK_civicrm_activity_source_contact_id";
+   
+   $dao = CRM_Core_DAO::executeQuery($query);
+
+   $query = "ALTER  TABLE civicrm_activity DROP COLUMN source_contact_id";
+   $dao = CRM_Core_DAO::executeQuery($query);
+
+   return TRUE;
+  }
+
+  /**
+   * (Queue Task Callback)
+   */
+  static function task_4_4_x_runSql(CRM_Queue_TaskContext $ctx, $rev) {
+    $upgrade = new CRM_Upgrade_Form();
+    $upgrade->processSQL($rev);
+
+    return TRUE;
+  }
+
+  /**
+   * Syntatic sugar for adding a task which (a) is in this class and (b) has
+   * a high priority.
+   *
+   * After passing the $funcName, you can also pass parameters that will go to
+   * the function. Note that all params must be serializable.
+   */
+  protected function addTask($title, $funcName) {
+    $queue = CRM_Queue_Service::singleton()->load(array(
+      'type' => 'Sql',
+      'name' => CRM_Upgrade_Form::QUEUE_NAME,
+    ));
+
+    $args = func_get_args();
+    $title = array_shift($args);
+    $funcName = array_shift($args);
+    $task = new CRM_Queue_Task(
+      array(get_class($this), $funcName),
+      $args,
+      $title
+    );
+    $queue->createItem($task, array('weight' => -1));
+  }
+}