diff --git a/lib/db/migrate2utf8.xml b/lib/db/migrate2utf8.xml
index 7efc35a2e1f..5971f21f58d 100755
--- a/lib/db/migrate2utf8.xml
+++ b/lib/db/migrate2utf8.xml
@@ -8,7 +8,7 @@
         <FIELD name="tracer" method="NO_CONV" type="text" length="0" />
       </FIELDS>
     </TABLE>
- 
+    <TABLE name="user_lastaccess" />
     <TABLE name="role">
 	  <FIELDS>
 	    <FIELD name="name" method="PHP_FUNCTION" type="varchar" length="255">
diff --git a/lib/db/mysql.php b/lib/db/mysql.php
index eae85f8967f..fa3e6f1771d 100644
--- a/lib/db/mysql.php
+++ b/lib/db/mysql.php
@@ -2186,6 +2186,20 @@ function main_upgrade($oldversion=0) {
         execute_sql("ALTER TABLE {$CFG->prefix}course_sections CHANGE sequence sequence text NULL AFTER section");
     }
 
+    // table to keep track of course page access times, used in online participants block, and participants list
+    if ($oldversion < 2006091200) {
+        execute_sql("CREATE TABLE {$CFG->prefix}user_lastaccess ( 
+                    `id` int(10) unsigned NOT NULL auto_increment, 
+                    `userid` int(10) unsigned NOT NULL default '0',
+                    `courseid` int(10) unsigned NOT NULL default '0', 
+                    `timeaccess` int(10) unsigned NOT NULL default '0', 
+                    KEY `userid` (`userid`),
+                    KEY `courseid` (`courseid`),
+                    UNIQUE KEY `userid-courseid` (`userid`, `courseid`),
+                    PRIMARY KEY (`id`) 
+                    )TYPE=MYISAM COMMENT ='time user last accessed any page in a course';", true);
+    }
+    
     return $result;
 }
 
diff --git a/lib/db/mysql.sql b/lib/db/mysql.sql
index a82e0adcb5d..2fe88c27935 100644
--- a/lib/db/mysql.sql
+++ b/lib/db/mysql.sql
@@ -1001,6 +1001,17 @@ CREATE TABLE prefix_role_names (
   PRIMARY KEY (`id`) 
 ) TYPE=MYISAM COMMENT ='role names in native strings';
 
+CREATE TABLE prefix_user_lastaccess ( 
+  `id` int(10) unsigned NOT NULL auto_increment, 
+  `userid` int(10) unsigned NOT NULL default '0',
+  `courseid` int(10) unsigned NOT NULL default '0', 
+  `timeaccess` int(10) unsigned NOT NULL default '0', 
+  KEY `userid` (`userid`),
+  KEY `courseid` (`courseid`),
+  UNIQUE KEY `userid-courseid` (`userid`, `courseid`),
+  PRIMARY KEY (`id`) 
+) TYPE=MYISAM COMMENT ='time user last accessed any page in a course';
+
 INSERT INTO prefix_log_display (module, action, mtable, field) VALUES ('user', 'view', 'user', 'CONCAT(firstname," ",lastname)');
 INSERT INTO prefix_log_display (module, action, mtable, field) VALUES ('course', 'user report', 'user', 'CONCAT(firstname," ",lastname)');
 INSERT INTO prefix_log_display (module, action, mtable, field) VALUES ('course', 'view', 'course', 'fullname');
diff --git a/lib/db/postgres7.php b/lib/db/postgres7.php
index 7b5111a240a..44ef464074a 100644
--- a/lib/db/postgres7.php
+++ b/lib/db/postgres7.php
@@ -1786,6 +1786,20 @@ function main_upgrade($oldversion=0) {
         execute_sql("ALTER TABLE {$CFG->prefix}course_sections ALTER COLUMN sequence DROP DEFAULT");
     }
 
+    // table to keep track of course page access times, used in online participants block, and participants list
+    if ($oldversion < 2006091200) {
+        execute_sql("CREATE TABLE {$CFG->prefix}user_lastaccess ( 
+                    id SERIAL PRIMARY KEY,     
+                    userid integer NOT NULL default 0,
+                    courseid integer NOT NULL default 0, 
+                    timeaccess integer NOT NULL default 0
+                    );", true);
+
+        execute_sql("CREATE INDEX {$CFG->prefix}user_lastaccess_userid_idx ON {$CFG->prefix}user_lastaccess (userid);", true);
+        execute_sql("CREATE INDEX {$CFG->prefix}user_lastaccess_courseid_idx ON {$CFG->prefix}user_lastaccess (courseid);", true);
+        execute_sql("CREATE UNIQUE INDEX {$CFG->prefix}user_lastaccess_useridcourseid_idx ON {$CFG->prefix}user_lastaccess (userid, courseid);", true);
+    
+    }
     return $result;
 }
 
diff --git a/lib/db/postgres7.sql b/lib/db/postgres7.sql
index 65f752fb8de..e1071f90c9a 100644
--- a/lib/db/postgres7.sql
+++ b/lib/db/postgres7.sql
@@ -764,6 +764,17 @@ CREATE INDEX prefix_role_names_roleid_idx ON prefix_role_names (roleid);
 CREATE INDEX prefix_role_names_contextid_idx ON prefix_role_names (contextid);
 CREATE UNIQUE INDEX prefix_role_names_roleidcontextid_idx ON prefix_role_names (roleid, contextid);
        
+CREATE TABLE prefix_user_lastaccess ( 
+  id SERIAL PRIMARY KEY,     
+  userid integer NOT NULL default 0,
+  courseid integer NOT NULL default 0, 
+  timeaccess integer NOT NULL default 0
+);
+
+CREATE INDEX prefix_user_lastaccess_userid_idx ON prefix_user_lastaccess (userid);
+CREATE INDEX prefix_user_lastaccess_courseid_idx ON prefix_user_lastaccess (courseid);
+CREATE UNIQUE INDEX prefix_user_lastaccess_useridcourseid_idx ON prefix_user_lastaccess (userid, courseid);
+      
 INSERT INTO prefix_log_display (module, action, mtable, field) VALUES ('user', 'view', 'user', 'firstname||\' \'||lastname');
 INSERT INTO prefix_log_display (module, action, mtable, field) VALUES ('course', 'user report', 'user', 'firstname||\' \'||lastname');
 INSERT INTO prefix_log_display (module, action, mtable, field) VALUES ('course', 'view', 'course', 'fullname');