drop table if exists t0,t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
explain select * from t0 where a < 3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
# 
# MDEV-5045: Server crashes in QPF_query::print_explain with log_slow_verbosity='query_plan,explain'
# 
set autocommit=1;
drop table t0;
# 
# MDEV-5047 virtual THD::~THD(): Assertion `status_var.memory_used == 0' fails on disconnect
# 
connect  con1,localhost,root,,;
ALTER TABLE nonexisting ENABLE KEYS;
ERROR 42S02: Table 'test.nonexisting' doesn't exist
SHOW WARNINGS;
Level	Code	Message
Error	1146	Table 'test.nonexisting' doesn't exist
disconnect con1;
connection default;
SELECT 1;
1
1
#
# MDEV-5060 Server crashes on EXPLAIN EXTENDED or EXPLAIN PARTITIONS with explain in slow_log
#
EXPLAIN PARTITIONS SELECT 1 ;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
#
# MDEV-5106: Server crashes in Explain_union::print_explain on ER_TOO_BIG_SELECT with explain in slow log
#
CREATE TABLE t1 (i INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES
(1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
SET max_join_size = 10;
( SELECT ta.* FROM t1 ta, t1 tb ) UNION ( SELECT * FROM t1 );
ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay
SELECT 'Server still alive?' as 'Yes';
Yes
Server still alive?
DROP TABLE t1;
#
# MDEV-5308 Crash when running with slow_query_log=1
#
SET @save1= @@log_slow_rate_limit;
SET @save2= @@long_query_time;
SET log_slow_rate_limit=1000;
SET long_query_time=0.000001;
SELECT 1;
1
1
SET log_slow_rate_limit=@save1;
SET long_query_time=@save2;
create table t1 (a int);
execute immediate "select * from t1 join t1 t2 on (t1.a>5) where exists (select 1)";
a	a
drop table t1;