mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 04:53:01 +01:00
34 lines
1.7 KiB
Text
34 lines
1.7 KiB
Text
drop table if exists t1,t2;
|
|
create table t1(str varchar(10) default 'def',strnull varchar(10),intg int default '10',rel double default '3.14');
|
|
insert into t1 values ('','',0,0.0);
|
|
select default(str), default(strnull), default(intg), default(rel) from t1;
|
|
default(str) default(strnull) default(intg) default(rel)
|
|
def NULL 10 3.14
|
|
explain extended select default(str), default(strnull), default(intg), default(rel) from t1;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00
|
|
Warnings:
|
|
Note 1003 select default('') AS `default(str)`,default('') AS `default(strnull)`,default(0) AS `default(intg)`,default(0) AS `default(rel)` from dual
|
|
select * from t1 where str <> default(str);
|
|
str strnull intg rel
|
|
0 0
|
|
explain select * from t1 where str <> default(str);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1
|
|
drop table t1;
|
|
CREATE TABLE t1 (id int(11), s varchar(20));
|
|
INSERT INTO t1 VALUES (1, 'one'), (2, 'two'), (3, 'three');
|
|
SELECT s, 32 AS mi FROM t1 GROUP BY s HAVING DEFAULT(mi) IS NULL;
|
|
ERROR HY000: Field 'mi' doesn't have a default value
|
|
DROP TABLE t1;
|
|
set timestamp=unix_timestamp('2001-01-01 10:20:30.123456');
|
|
create table t1 (a int default 1, b int default (a+1),
|
|
c varchar(100) default 'foo', d text default 'bar',
|
|
e timestamp default now(), f timestamp(6) default now(2));
|
|
insert t1 () values ();
|
|
insert t1 (a) values (10);
|
|
select default(a),default(b),default(c),default(d),default(e),default(f) from t1;
|
|
default(a) default(b) default(c) default(d) default(e) default(f)
|
|
1 2 foo bar 2001-01-01 10:20:30 2001-01-01 10:20:30.120000
|
|
1 11 foo bar 2001-01-01 10:20:30 2001-01-01 10:20:30.120000
|
|
drop table t1;
|