+
+       /**
+        * Find every session pending application
+        *
+        * @return array<Session> The sessions to update
+        */
+       public function findAllPendingApplication() {
+               //Get entity manager
+               $em = $this->getEntityManager();
+
+               //Get quote strategy
+               $qs = $em->getConfiguration()->getQuoteStrategy();
+               $dp = $em->getConnection()->getDatabasePlatform();
+
+               //Get quoted table names
+               //XXX: this allow to make this code table name independent
+               $tables = [
+                       'RapsysAirBundle:Session' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Session'), $dp),
+                       "\t" => '',
+                       "\n" => ' '
+               ];
+
+               //Select all sessions without application attributed with diff(start, now) <= if(diff(start, created) <= GOOD_DELAY day, diff(start, created)*3/4, GOOD_DELAY day)
+               //XXX: consider only unfinished sessions with stop > now
+               //XXX: consider as grace time first quarter (1/4) between creation and start time when below gooddelay
+               //XXX: we may remove ADDDATE(start, INTERVAL IF(s.slot_id = 4, 1, 0) DAY) used for after specificity
+               $req =<<<SQL
+SELECT s.id
+FROM RapsysAirBundle:Session AS s
+WHERE
+       s.application_id IS NULL AND
+       ADDDATE(ADDTIME(ADDTIME(s.date, s.begin), s.length), INTERVAL IF(s.slot_id = 4, 1, 0) DAY) > NOW() AND
+       TIMEDIFF(ADDDATE(ADDTIME(s.date, s.begin), INTERVAL IF(s.slot_id = 4, 1, 0) DAY), NOW()) <= IF(DATEDIFF(ADDDATE(ADDTIME(s.date, s.begin), INTERVAL IF(s.slot_id = 4, 1, 0) DAY), s.created) <= :gooddelay, SEC_TO_TIME(TIME_TO_SEC(TIMEDIFF(ADDDATE(ADDTIME(s.date, s.begin), INTERVAL IF(s.slot_id = 4, 1, 0) DAY), s.created))*3/4), SEC_TO_TIME(:gooddelay*24*3600))
+ORDER BY ADDDATE(ADDTIME(s.date, s.begin), INTERVAL IF(s.slot_id = 4, 1, 0) DAY) ASC, s.created ASC
+SQL;
+
+               //Replace bundle entity name by table name
+               $req = str_replace(array_keys($tables), array_values($tables), $req);
+
+               //Get result set mapping instance
+               $rsm = new ResultSetMapping();
+
+               //Declare all fields
+               $rsm
+                       ->addEntityResult('RapsysAirBundle:Session', 's')
+                       ->addFieldResult('s', 'id', 'id')
+                       ->addIndexBy('s', 'id');
+
+               //Send result
+               return $em
+                       ->createNativeQuery($req, $rsm)
+                       ->setParameter('limit', PHP_INT_MAX)
+                       ->setParameter('gooddelay', self::GOOD_DELAY)
+                       ->getResult();
+       }
+
+       /**
+        * Find all session pending hourly weather
+        *
+        * @return array<Session> The sessions to update
+        */
+       public function findAllPendingHourlyWeather() {
+               //Get entity manager
+               $em = $this->getEntityManager();
+
+               //Get quote strategy
+               $qs = $em->getConfiguration()->getQuoteStrategy();
+               $dp = $em->getConnection()->getDatabasePlatform();
+
+               //Get quoted table names
+               //XXX: this allow to make this code table name independent
+               $tables = [
+                       'RapsysAirBundle:Session' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Session'), $dp),
+                       'RapsysAirBundle:Slot' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Slot'), $dp),
+                       'RapsysAirBundle:Location' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Location'), $dp),
+                       "\t" => '',
+                       "\n" => ' '
+               ];
+
+               //Select all sessions starting and stopping in the next 3 days
+               //XXX: select session starting after now and stopping before date(now)+3d as accuweather only provide hourly data for the next 3 days (INTERVAL 3 DAY)
+               //XXX: we may remove ADDDATE(start, INTERVAL IF(s.slot_id = 4, 1, 0) DAY) used for after specificity
+               $req = <<<SQL
+SELECT s.id, s.slot_id, s.location_id, s.date, s.begin, s.length, s.rainfall, s.rainrisk, s.realfeel, s.realfeelmin, s.realfeelmax, s.temperature, s.temperaturemin, s.temperaturemax, l.zipcode, o.title
+FROM RapsysAirBundle:Session AS s
+JOIN RapsysAirBundle:Slot AS o ON (o.id = s.slot_id)
+JOIN RapsysAirBundle:Location AS l ON (l.id = s.location_id)
+WHERE ADDDATE(ADDTIME(s.date, s.begin), INTERVAL IF(s.slot_id = 4, 1, 0) DAY) >= NOW() AND ADDDATE(ADDTIME(ADDTIME(s.date, s.begin), s.length), INTERVAL IF(s.slot_id = 4, 1, 0) DAY) < DATE(ADDDATE(NOW(), INTERVAL :accuhourly DAY))
+SQL;
+
+               //Replace bundle entity name by table name
+               $req = str_replace(array_keys($tables), array_values($tables), $req);
+
+               //Get result set mapping instance
+               $rsm = new ResultSetMapping();
+
+               //Declare all fields
+               $rsm
+                       ->addEntityResult('RapsysAirBundle:Session', 's')
+                       ->addFieldResult('s', 'id', 'id')
+                       ->addFieldResult('s', 'date', 'date')
+                       ->addFieldResult('s', 'begin', 'begin')
+                       ->addFieldResult('s', 'length', 'length')
+                       ->addFieldResult('s', 'rainfall', 'rainfall')
+                       ->addFieldResult('s', 'rainrisk', 'rainrisk')
+                       ->addFieldResult('s', 'realfeel', 'realfeel')
+                       ->addFieldResult('s', 'realfeelmin', 'realfeelmin')
+                       ->addFieldResult('s', 'realfeelmax', 'realfeelmax')
+                       ->addFieldResult('s', 'temperature', 'temperature')
+                       ->addFieldResult('s', 'temperaturemin', 'temperaturemin')
+                       ->addFieldResult('s', 'temperaturemax', 'temperaturemax')
+                       ->addJoinedEntityResult('RapsysAirBundle:Slot', 'o', 's', 'slot')
+                       ->addFieldResult('o', 'slot_id', 'id')
+                       ->addFieldResult('o', 'title', 'title')
+                       ->addJoinedEntityResult('RapsysAirBundle:Location', 'l', 's', 'location')
+                       ->addFieldResult('l', 'location_id', 'id')
+                       ->addFieldResult('l', 'zipcode', 'zipcode')
+                       ->addIndexBy('s', 'id');
+
+               //Send result
+               return $em
+                       ->createNativeQuery($req, $rsm)
+                       ->setParameter('accuhourly', self::ACCUWEATHER_HOURLY)
+                       ->getResult();
+       }
+
+       /**
+        * Find all session pending daily weather
+        *
+        * @return array<Session> The sessions to update
+        */
+       public function findAllPendingDailyWeather() {
+               //Get entity manager
+               $em = $this->getEntityManager();
+
+               //Get quote strategy
+               $qs = $em->getConfiguration()->getQuoteStrategy();
+               $dp = $em->getConnection()->getDatabasePlatform();
+
+               //Get quoted table names
+               //XXX: this allow to make this code table name independent
+               $tables = [
+                       'RapsysAirBundle:Session' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Session'), $dp),
+                       'RapsysAirBundle:Slot' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Slot'), $dp),
+                       'RapsysAirBundle:Location' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Location'), $dp),
+                       "\t" => '',
+                       "\n" => ' '
+               ];
+
+               //Select all sessions stopping after next 3 days
+               //XXX: select session stopping after or equal date(now)+3d as accuweather only provide hourly data for the next 3 days (INTERVAL 3 DAY)
+               //XXX: we may remove ADDDATE(start, INTERVAL IF(s.slot_id = 4, 1, 0) DAY) used for after specificity
+               $req = <<<SQL
+SELECT s.id, s.slot_id, s.location_id, s.date, s.begin, s.length, s.rainfall, s.rainrisk, s.realfeel, s.realfeelmin, s.realfeelmax, s.temperature, s.temperaturemin, s.temperaturemax, l.zipcode, o.title
+FROM RapsysAirBundle:Session AS s
+JOIN RapsysAirBundle:Slot AS o ON (o.id = s.slot_id)
+JOIN RapsysAirBundle:Location AS l ON (l.id = s.location_id)
+WHERE ADDDATE(ADDTIME(ADDTIME(s.date, s.begin), s.length), INTERVAL IF(s.slot_id = 4, 1, 0) DAY) >= DATE(ADDDATE(NOW(), INTERVAL :accuhourly DAY)) AND ADDDATE(ADDTIME(ADDTIME(s.date, s.begin), s.length), INTERVAL IF(s.slot_id = 4, 1, 0) DAY) < DATE(ADDDATE(NOW(), INTERVAL :accudaily DAY))
+SQL;
+
+               //Replace bundle entity name by table name
+               $req = str_replace(array_keys($tables), array_values($tables), $req);
+
+               //Get result set mapping instance
+               $rsm = new ResultSetMapping();
+
+               //Declare all fields
+               $rsm
+                       ->addEntityResult('RapsysAirBundle:Session', 's')
+                       ->addFieldResult('s', 'id', 'id')
+                       ->addFieldResult('s', 'date', 'date')
+                       ->addFieldResult('s', 'begin', 'begin')
+                       ->addFieldResult('s', 'length', 'length')
+                       ->addFieldResult('s', 'rainfall', 'rainfall')
+                       ->addFieldResult('s', 'rainrisk', 'rainrisk')
+                       ->addFieldResult('s', 'realfeel', 'realfeel')
+                       ->addFieldResult('s', 'realfeelmin', 'realfeelmin')
+                       ->addFieldResult('s', 'realfeelmax', 'realfeelmax')
+                       ->addFieldResult('s', 'temperature', 'temperature')
+                       ->addFieldResult('s', 'temperaturemin', 'temperaturemin')
+                       ->addFieldResult('s', 'temperaturemax', 'temperaturemax')
+                       ->addJoinedEntityResult('RapsysAirBundle:Slot', 'o', 's', 'slot')
+                       ->addFieldResult('o', 'slot_id', 'id')
+                       ->addFieldResult('o', 'title', 'title')
+                       ->addJoinedEntityResult('RapsysAirBundle:Location', 'l', 's', 'location')
+                       ->addFieldResult('l', 'location_id', 'id')
+                       ->addFieldResult('l', 'zipcode', 'zipcode')
+                       ->addIndexBy('s', 'id');
+
+               //Send result
+               return $em
+                       ->createNativeQuery($req, $rsm)
+                       ->setParameter('accudaily', self::ACCUWEATHER_DAILY)
+                       ->setParameter('accuhourly', self::ACCUWEATHER_HOURLY)
+                       ->getResult();
+       }
+
+       /**
+        * Fetch session best application by session id
+        *
+        * @param int $id The session id
+        * @return Application|null The application or null
+        */
+       public function findBestApplicationById($id) {
+               //Get entity manager
+               $em = $this->getEntityManager();
+
+               //Get quote strategy
+               $qs = $em->getConfiguration()->getQuoteStrategy();
+               $dp = $em->getConnection()->getDatabasePlatform();
+
+               //Get quoted table names
+               //XXX: this allow to make this code table name independent
+               $tables = [
+                       'RapsysAirBundle:Application' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Application'), $dp),
+                       'RapsysAirBundle:Session' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Session'), $dp),
+                       "\t" => '',
+                       "\n" => ' '
+               ];
+
+               /**
+                * Query session applications ranked by score, created and user_id
+                *
+                * @xxx User with bad behaviour application are excluded until remaining <= baddelay:
+                * - with (count(premium = 1)+1)/(count(premium = 0)+1) >= 1
+                * - with count(sessions) <= 5
+                * - with average(temperature) >= average(temperature other) + 10
+                *
+                * @xxx Magic happen on this line:
+                * WHERE IF(d.pnp_rate >= 1, d.remaining <= SEC_TO_TIME(:baddelay), 1) AND IF(d.s_count <= 5, d.remaining <= SEC_TO_TIME(:baddelay), 1) AND IF(d.tr_rate >= (d.otr_rate + 10), d.remaining <= SEC_TO_TIME(:baddelay), 1)
+                *
+                * @todo Limit score on last year only ???
+                * AND DATEDIFF(s.date, NOW()) <= 365
+                *
+                * TODO: we may add ADDDATE(start, INTERVAL IF(s.slot_id = 4, 1, 0) DAY) used for after specificity
+                */
+               $req = <<<SQL
+SELECT d.id, d.score
+FROM (
+       SELECT
+               c.id,
+               c.session_id,
+               c.user_id,
+               c.score,
+               c.remaining,
+               c.created,
+               c.s_count,
+               c.tr_rate,
+               AVG(IF(a4.id IS NOT NULL, s4.temperature/(1+s4.rainfall), NULL)) AS otr_rate,
+               c.pnp_rate
+       FROM (
+               SELECT
+                       b.id,
+                       b.session_id,
+                       b.user_id,
+                       b.score,
+                       b.remaining,
+                       b.created,
+                       COUNT(a3.id) AS s_count,
+                       AVG(IF(a3.id IS NOT NULL AND s3.temperature IS NOT NULL AND s3.rainfall IS NOT NULL, s3.temperature/(1+s3.rainfall), NULL)) AS tr_rate,
+                       (SUM(IF(a3.id IS NOT NULL AND s3.premium = 1, 1, 0))+1)/(SUM(IF(a3.id IS NOT NULL AND s3.premium = 0, 1, 0))+1) AS pnp_rate
+               FROM (
+                       SELECT
+                               a.id,
+                               s.id AS session_id,
+                               a.user_id,
+                               SUM(IF(a2.id IS NOT NULL, 1/ABS(DATEDIFF(s.date, s2.date)), 0)) AS score,
+                               TIMEDIFF(ADDTIME(s.date, s.begin), NOW()) AS remaining,
+                               a.created
+                       FROM sessions AS s
+                       JOIN applications AS a ON (a.session_id = s.id AND a.canceled IS NULL)
+                       LEFT JOIN sessions AS s2 ON (s2.id != s.id AND s2.location_id = s.location_id AND s2.slot_id = s.slot_id AND s2.application_id IS NOT NULL)
+                       LEFT JOIN applications AS a2 ON (a2.id = s2.application_id AND a2.user_id = a.user_id AND (a2.canceled IS NULL OR TIMESTAMPDIFF(DAY, a2.canceled, ADDTIME(s2.date, s2.begin)) < 1))
+                       WHERE s.id = :sid
+                       GROUP BY a.id
+                       ORDER BY NULL
+                       LIMIT 0, :limit
+               ) AS b
+               LEFT JOIN sessions AS s3 ON (s3.id != b.session_id AND s3.application_id IS NOT NULL)
+               LEFT JOIN applications AS a3 ON (a3.id = s3.application_id AND a3.user_id = b.user_id AND (a3.canceled IS NULL OR TIMESTAMPDIFF(DAY, a3.canceled, ADDTIME(s3.date, s3.begin)) < 1))
+               GROUP BY b.id
+               ORDER BY NULL
+               LIMIT 0, :limit
+       ) AS c
+       LEFT JOIN sessions AS s4 ON (s4.id != c.session_id AND s4.application_id IS NOT NULL AND s4.temperature IS NOT NULL AND s4.rainfall IS NOT NULL)
+       LEFT JOIN applications AS a4 ON (a4.id = s4.application_id AND a4.user_id != c.user_id AND (a4.canceled IS NULL OR TIMESTAMPDIFF(DAY, a4.canceled, ADDTIME(s4.date, s4.begin)) < 1))
+       GROUP BY c.id
+       ORDER BY NULL
+       LIMIT 0, :limit
+) AS d
+WHERE IF(d.pnp_rate >= 1, d.remaining <= SEC_TO_TIME(:baddelay), 1) AND IF(d.s_count <= 5, d.remaining <= SEC_TO_TIME(:baddelay), 1) AND IF(d.tr_rate >= (d.otr_rate + 10), d.remaining <= SEC_TO_TIME(:baddelay), 1)
+ORDER BY d.score ASC, d.created ASC, d.user_id ASC
+SQL;
+
+               //Replace bundle entity name by table name
+               $req = str_replace(array_keys($tables), array_values($tables), $req);
+
+               //Set update request
+               $upreq = 'UPDATE RapsysAirBundle:Application SET score = :score, updated = NOW() WHERE id = :id';
+
+               //Replace bundle entity name by table name
+               $upreq = str_replace(array_keys($tables), array_values($tables), $upreq);
+
+               //Get result set mapping instance
+               $rsm = new ResultSetMapping();
+
+               //Declare all fields
+               $rsm
+                       ->addEntityResult('RapsysAirBundle:Application', 'a')
+                       ->addFieldResult('a', 'id', 'id')
+                       ->addFieldResult('a', 'score', 'score')
+                       ->addIndexBy('a', 'id');
+
+               //Get result
+               //XXX: setting limit in subqueries is required to prevent mariadb optimisation
+               $applications = $em
+                       ->createNativeQuery($req, $rsm)
+                       ->setParameter('sid', $id)
+                       ->setParameter('baddelay', self::BAD_DELAY*24*3600)
+                       ->setParameter('limit', PHP_INT_MAX)
+                       //XXX: removed, we update score before returning best candidate
+                       //->getOneOrNullResult(Query::HYDRATE_SINGLE_SCALAR);
+                       ->getResult();
+
+               //Init ret
+               $ret = null;
+
+               //Update score
+               foreach($applications as $application) {
+                       //Check if we already saved best candidate
+                       if ($ret === null) {
+                               //Return first application
+                               $ret = $application;
+                       }
+
+                       //Update application updated field
+                       //XXX: updated field is not modified for user with bad behaviour as application is not retrieved until delay is reached
+                       $em->getConnection()->executeUpdate($upreq, ['id' => $application->getId(), 'score' => $application->getScore()], ['id' => Type::INTEGER, 'score' => Type::FLOAT]);
+               }
+
+               //Return best ranked application
+               return $ret;
+       }