use_stat_tables='preferably'

optimizer_use_condition_selectivity=4

histogram_size=255

Thread pointer: 0x0x7f187cf92008

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

stack_bottom = 0x7f1cb5654d10 thread_stack 0x48000

/usr/sbin/mysqld(my_print_stacktrace+0x2b)[0xb7054b]

/usr/sbin/mysqld(handle_fatal_signal+0x398)[0x727588]

/lib64/libpthread.so.0(+0xf710)[0x7f1cb531a710]

/usr/sbin/mysqld(_ZN9Field_bit5storeEPKcjPK15charset_info_st+0x10f)[0x713caf]

/usr/sbin/mysqld(_Z28get_column_range_cardinalityP5FieldP12st_key_rangeS2_j+0x135)[0x63f605]

/usr/sbin/mysqld(_Z36calculate_cond_selectivity_for_tableP3THDP5TABLEP4Item+0x836)[0x80bd76]

/usr/sbin/mysqld[0x528cce]

/usr/sbin/mysqld(_ZN4JOIN14optimize_innerEv+0x6de)[0x61c8de]

/usr/sbin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0xd8)[0x61efb8]

/usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x28d)[0x62284d]

/usr/sbin/mysqld[0x5ca456]

/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x4c4f)[0x5d51af]

/usr/sbin/mysqld[0x5d6cc2]

/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1b20)[0x5d8e80]

/usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x453)[0x696993]

/usr/sbin/mysqld(handle_one_connection+0x42)[0x696a62]

/lib64/libpthread.so.0(+0x79d1)[0x7f1cb53129d1]

/lib64/libc.so.6(clone+0x6d)[0x7f1cb3a2fb5d]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7f1859c20020): SELECT id, reportName, scheduleName, reportId, reportScheduleId, reportType, status, reportFormat, generationStartTime, executionTime, fileUrl, fileSize, retainUntil, users, userGroups, recurrenceType, recurrenceIntervalType, recurrenceIntervalValue, recurrenceParam1, recurrenceParam2, recurrenceParam3, reportSource, userId, isGloballyViewable, retainLast FROM report_schedule_logs WHERE ((`retainUntil` < 20140912114319) AND (`retainLast` != true))

Connection ID (thread ID): 4

Status: NOT_KILLED

 CREATE TABLE `report_schedule_logs` (

  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,

  `reportName` varchar(128) DEFAULT NULL,

  `scheduleName` varchar(128) DEFAULT NULL,

  `reportId` varchar(255) DEFAULT NULL,

  `reportScheduleId` varchar(255) DEFAULT NULL,

  `reportType` int(10) unsigned DEFAULT NULL,

  `reportFormat` tinyint(3) unsigned DEFAULT NULL,

  `generationStartTime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

  `executionTime` varchar(128) DEFAULT NULL,

  `reportSource` tinyint(3) unsigned DEFAULT NULL,

  `status` tinyint(3) unsigned DEFAULT NULL,

  `fileUrl` varchar(1024) DEFAULT NULL,

  `fileSize` bigint(20) DEFAULT NULL,

  `retainUntil` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',

  `retainLast` bit(1) DEFAULT b'0',

  `users` longblob,

  `userGroups` longblob,

  `recurrenceType` tinyint(3) unsigned DEFAULT NULL,

  `recurrenceIntervalType` tinyint(3) unsigned DEFAULT NULL,

  `recurrenceIntervalValue` int(11) DEFAULT NULL,

  `recurrenceParam1` varchar(128) DEFAULT NULL,

  `recurrenceParam2` varchar(128) DEFAULT NULL,

  `recurrenceParam3` varchar(128) DEFAULT NULL,

  `userId` varchar(128) DEFAULT NULL,

  `isGloballyViewable` bit(1) DEFAULT NULL,

  PRIMARY KEY (`id`),

  KEY `report_schedule_logs_idx1` (`status`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8

explain  SELECT id, reportName, scheduleName, reportId, reportScheduleId, reportType, status, reportFormat, generationStartTime, executionTime, fileUrl, fileSize, retainUntil, users, userGroups, recurrenceType, recurrenceIntervalType, recurrenceIntervalValue, recurrenceParam1, recurrenceParam2, recurrenceParam3, reportSource, userId, isGloballyViewable, retainLast FROM report_schedule_logs WHERE ((`retainUntil` < 20140912114319) AND (`retainLast` != true));

 show variables like 'optimizer_use_condition_selectivity';

+-------------------------------------+-------+

| Variable_name                       | Value |

+-------------------------------------+-------+

| optimizer_use_condition_selectivity | 4     |

+-------------------------------------+-------+

1 row in set (0.00 sec)

MariaDB [sa]> explain  SELECT id, reportName, scheduleName, reportId, reportScheduleId, reportType, status, reportFormat, generationStartTime, executionTime, fileUrl, fileSize, retainUntil, users, userGroups, recurrenceType, recurrenceIntervalType, recurrenceIntervalValue, recurrenceParam1, recurrenceParam2, recurrenceParam3, reportSource, userId, isGloballyViewable, retainLast FROM report_schedule_logs WHERE ((`retainUntil` < 20140912114319) AND (`retainLast` != true));

ERROR 2013 (HY000): Lost connection to MySQL server during query

MariaDB [sa]> show variables like 'optimizer_use_condition_selectivity';ERROR 2006 (HY000): MySQL server has gone awayNo connection. Trying to reconnect...

Connection id:    6

Current database: sa

+-------------------------------------+-------+

| Variable_name                       | Value |

+-------------------------------------+-------+

| optimizer_use_condition_selectivity | 1     |

+-------------------------------------+-------+

1 row in set (0.46 sec)

MariaDB [sa]> explain  SELECT id, reportName, scheduleName, reportId, reportScheduleId, reportType, status, reportFormat, generationStartTime, executionTime, fileUrl, fileSize, retainUntil, users, userGroups, recurrenceType, recurrenceIntervalType, recurrenceIntervalValue, recurrenceParam1, recurrenceParam2, recurrenceParam3, reportSource, userId, isGloballyViewable, retainLast FROM report_schedule_logs WHERE ((`retainUntil` < 20140912114319) AND (`retainLast` != true));

+------+-------------+----------------------+------+---------------+------+---------+------+------+-------------+

| id   | select_type | table                | type | possible_keys | key  | key_len | ref  | rows | Extra       |

+------+-------------+----------------------+------+---------------+------+---------+------+------+-------------+

|    1 | SIMPLE      | report_schedule_logs | ALL  | NULL          | NULL | NULL    | NULL |    1 | Using where |

+------+-------------+----------------------+------+---------------+------+---------+------+------+-------------+