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create or replace table t1(a json);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`a`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
create or replace table t1(a json character set utf8);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'character set utf8)' at line 1
create or replace table t1(a json default '{a:1}');
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT '{a:1}' CHECK (json_valid(`a`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
create or replace table t1(a json not null check (json_valid(a)));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL CHECK (json_valid(`a`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
insert t1 values ('[]');
insert t1 values ('a');
ERROR 23000: CONSTRAINT `t1.a` failed for `test`.`t1`
create or replace table t1(a json not null);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL CHECK (json_valid(`a`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
insert t1 values ('[]');
insert t1 values ('a');
ERROR 23000: CONSTRAINT `t1.a` failed for `test`.`t1`
set timestamp=unix_timestamp('2010:11:12 13:14:15');
create or replace table t1(a json default(json_object('now', now())));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT json_object('now',current_timestamp()) CHECK (json_valid(`a`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
insert t1 values ();
select * from t1;
a
{"now": "2010-11-12 13:14:15"}
drop table t1;
create table t1 (t json) as select json_quote('foo') as t;
create table t2 (a json) as select json_quote('foo') as t;
create table t3 like t1;
select * from t1;
t
"foo"
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`t` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`t`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`a`)),
`t` varchar(38) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
show create table t3;
Table Create Table
t3 CREATE TABLE `t3` (
`t` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`t`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1,t2,t3;
create table t1 (t json check (length(t) > 0));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`t` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (octet_length(`t`) > 0)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (t text) engine=myisam;
insert into t1 values ("{}"),("");
create table t2 (t json) select t from t1;
ERROR 23000: CONSTRAINT `t2.t` failed for `test`.`t2`
select * from t2;
ERROR 42S02: Table 'test.t2' doesn't exist
drop table t1;
create or replace table t1(a json default(json_object('now', 1)) check (json_valid(a)));
insert into t1 values ();
insert into t1 values ("{}");
insert into t1 values ("xxx");
ERROR 23000: CONSTRAINT `t1.a` failed for `test`.`t1`
select * from t1;
a
{"now": 1}
{}
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT json_object('now',1) CHECK (json_valid(`a`))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
select cast('{a:1}' as text);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'text)' at line 1
select cast('{a:1}' as json);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'json)' at line 1
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