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drop table if exists t1;
select 0x41,0x41+0,0x41 | 0x7fffffffffffffff | 0,0xffffffffffffffff | 0 ;
0x41 0x41+0 0x41 | 0x7fffffffffffffff | 0 0xffffffffffffffff | 0
A 65 9223372036854775807 18446744073709551615
select 0x31+1,concat(0x31)+1,-0xf;
0x31+1 concat(0x31)+1 -0xf
50 2 -15
select x'31',X'ffff'+0;
x'31' X'ffff'+0
1 65535
create table t1 (ID int(8) unsigned zerofill not null auto_increment,UNIQ bigint(21) unsigned zerofill not null,primary key (ID),unique (UNIQ) );
insert into t1 set UNIQ=0x38afba1d73e6a18a;
insert into t1 set UNIQ=123;
explain extended select * from t1 where UNIQ=0x38afba1d73e6a18a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const UNIQ UNIQ 8 const 1
Warnings:
Note 1003 select '00000001' AS `ID`,'004084688022709641610' AS `UNIQ` from `test`.`t1` where 1
drop table t1;
select x'hello';
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'x'hello'' at line 1
select 0xfg;
ERROR 42S22: Unknown column '0xfg' in 'field list'
create table t1 select 1 as x, 2 as xx;
select x,xx from t1;
x xx
1 2
drop table t1;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varbinary(255) default NULL,
`b` varchar(255) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select length(a), length(b) from t1;
length(a) length(b)
255 3
255 3
CHECK TABLE t1 FOR UPGRADE;
Table Op Msg_type Msg_text
test.t1 check error Table upgrade required. Please do "REPAIR TABLE `t1`" to fix it!
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair status OK
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varbinary(255) default NULL,
`b` varchar(255) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select length(a), length(b) from t1;
length(a) length(b)
3 3
3 3
insert into t1 values("ccc", "ddd");
select length(a), length(b) from t1;
length(a) length(b)
3 3
3 3
3 3
select hex(a), hex(b) from t1;
hex(a) hex(b)
616161 636363
626262 646464
636363 646464
select concat("'", a, "'"), concat("'", b, "'") from t1;
concat("'", a, "'") concat("'", b, "'")
'aaa' 'ccc'
'bbb' 'ddd'
'ccc' 'ddd'
drop table t1;
create table t1(a varbinary(255));
insert into t1 values("aaa ");
select length(a) from t1;
length(a)
6
alter table t1 modify a varchar(255);
select length(a) from t1;
length(a)
6
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