stop slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
start slave;
reset master;
create table t1(n char(30));
set @i1:=12345678901234, @i2:=-12345678901234, @i3:=0, @i4:=-1;
set @s1:='This is a test', @r1:=12.5, @r2:=-12.5;
set @n1:=null;
set @s2:='', @s3:='abc\'def', @s4:= 'abc\\def', @s5:= 'abc''def';
insert into t1 values (@i1), (@i2), (@i3), (@i4);
insert into t1 values (@r1), (@r2);
insert into t1 values (@s1), (@s2), (@s3), (@s4), (@s5);
insert into t1 values (@n1);
insert into t1 values (@n2);
insert into t1 values (@a:=0), (@a:=@a+1), (@a:=@a+1);
insert into t1 values (@a+(@b:=@a+1));
set @q:='abc';
insert t1 values (@q), (@q:=concat(@q, 'n1')), (@q:=concat(@q, 'n2'));
set @a:=5;
insert into t1 values (@a),(@a);
select * from t1 where n = '<nonexistant>';
n
insert into t1 values (@a),(@a),(@a*5);
SELECT * FROM t1 ORDER BY n;
n
NULL
NULL
NULL
NULL
NULL

-1
-12.5
-12345678901234
0
0
1
12.5
12345678901234
2
5
5
5
abc
abc'def
abc'def
abcn1
abcn1n2
abc\def
This is a test
SELECT * FROM t1 ORDER BY n;
n
NULL
NULL
NULL
NULL
NULL

-1
-12.5
-12345678901234
0
0
1
12.5
12345678901234
2
5
5
5
abc
abc'def
abc'def
abcn1
abcn1n2
abc\def
This is a test
insert into t1 select * FROM (select @var1 union  select @var2) AS t2;
drop table t1;
stop slave;
