set global max_allowed_packet=400000000;
set storage_engine=aria;
affected rows: 0
drop table if exists t1, t2;
affected rows: 0
create table t1(a char(3));
affected rows: 0
insert into t1 values("abc");
affected rows: 1
insert into t1 select "def" from t1;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
insert into t1 select "ghi" from t1;
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
insert into t1 select "jkl" from t1;
affected rows: 4
info: Records: 4  Duplicates: 0  Warnings: 0
insert into t1 select "mno" from t1;
affected rows: 8
info: Records: 8  Duplicates: 0  Warnings: 0
insert into t1 select "pqr" from t1;
affected rows: 16
info: Records: 16  Duplicates: 0  Warnings: 0
insert into t1 select "stu" from t1;
affected rows: 32
info: Records: 32  Duplicates: 0  Warnings: 0
insert into t1 select "vwx" from t1;
affected rows: 64
info: Records: 64  Duplicates: 0  Warnings: 0
insert into t1 select "yza" from t1;
affected rows: 128
info: Records: 128  Duplicates: 0  Warnings: 0
insert into t1 select "ceg" from t1;
affected rows: 256
info: Records: 256  Duplicates: 0  Warnings: 0
insert into t1 select "ikm" from t1;
affected rows: 512
info: Records: 512  Duplicates: 0  Warnings: 0
insert into t1 select "oqs" from t1;
affected rows: 1024
info: Records: 1024  Duplicates: 0  Warnings: 0
select count(*) from t1;
count(*)
2048
affected rows: 1
insert into t1 select "uwy" from t1;
affected rows: 2048
info: Records: 2048  Duplicates: 0  Warnings: 0
create table t2 select * from t1;
affected rows: 4096
info: Records: 4096  Duplicates: 0  Warnings: 0
select count(*) from t1;
count(*)
4096
affected rows: 1
select count(*) from t2;
count(*)
4096
affected rows: 1
drop table t1, t2;
affected rows: 0
create table t1 (a int, b longtext);
affected rows: 0
insert into t1 values (1,"123456789012345678901234567890"),(2,"09876543210987654321");
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=CONCAT(b,b);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
select a,length(b) from t1;
a	length(b)
1	251658240
2	167772160
affected rows: 2
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
affected rows: 1
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
update t1 set b=mid(b,1,length(b)/2);
affected rows: 2
info: Rows matched: 2  Changed: 2  Warnings: 0
select a,length(b) from t1;
a	length(b)
1	60
2	40
affected rows: 2
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
affected rows: 1
drop table t1;
affected rows: 0
