Mysql – JSON array format in MySQL not working

jsonMySQL

What is the proper way to do a JSON data array in MySQL?

Following the JSON.org example http://json.org/example.html does not work:

 insert into zz_TEST_ObsJSON (jsonData) values ('{"Test1":{"Val1":"37", "Val2":"25"}},{"Test2":{"Val1":"25", "Val2":"27"}}');

ERROR 3140 (22032): Invalid JSON text: "The document root must not follow by other values." at position 36 in value for column 'zz_TEST_ObsJSON.jsonData'.

For giggles, tried putting it all in another { }:

insert into zz_TEST_ObsJSON (jsonData) values ('{{"Test1":{"Val1":"37", "Val2":"25"}},{"Test2":{"Val1":"25", "Val2":"27"}}}');

ERROR 3140 (22032): Invalid JSON text: "Missing a name for object member." at position 1 in value for column 'zz_TEST_ObsJSON.jsonData'.

This other method that kind of looks like geoJSON does not either:

insert into zz_TEST_ObsJSON (jsonData) values ('[["Test1":{"Val1":"37", "Val2":"25"}],["Test2":{"Val1":"25", "Val2":"27"}]]');

ERROR 3140 (22032): Invalid JSON text: "Missing a comma or ']' after an array element." at position 10 in value for column 'zz_TEST_ObsJSON.jsonData'.

insert into zz_TEST_ObsJSON (jsonData) values ('["Test1":{"Val1":"37", "Val2":"25"}],["Test2":{"Val1":"25", "Val2":"27"}]');

ERROR 3140 (22032): Invalid JSON text: "Missing a comma or ']' after an array element." at position 9 in value for column 'zz_TEST_ObsJSON.jsonData'.

Best Answer

Are you attempting to insert a JSON array with two objects, Test1 and Test2?

If so, then you need to insert the data as an array:

JSON array:

[{
  "Test1": {
    "Val1": "37",
    "Val2": "25"
  }
}, {
  "Test2": {
    "Val1": "25",
    "Val2": "27"
  }
}]

Your INSERT statement would look similar to the following (note the wrapping brackets around the JSON objects):

INSERT INTO zz_TEST_ObsJSON (jsonData) values ('[{"Test1":{"Val1":"37", "Val2":"25"}},{"Test2":{"Val1":"25", "Val2":"27"}}]');

Related Solutions

Mysql – Drop auto increment hack w/o alter table

I tried something similar just now

Here is MySQL for My PC

mysql> select * from information_schema.global_variables where variable_name='datadir' or variable_name like 'versio%';
+-------------------------+------------------------------+
| VARIABLE_NAME           | VARIABLE_VALUE               |
+-------------------------+------------------------------+
| VERSION_COMMENT         | MySQL Community Server (GPL) |
| VERSION                 | 5.5.12-log                   |
| VERSION_COMPILE_MACHINE | x86                          |
| DATADIR                 | C:\MySQL_5.5.12\data\        |
| VERSION_COMPILE_OS      | Win64                        |
+-------------------------+------------------------------+
5 rows in set (0.00 sec)

I will run this using MyISAM

Step 01) create a table called 'rolando'
Step 02) insert 'dominique' and 'diamond'
Step 03) copy the table structure to 'pamela'
Step 04) alter 'pamela' to not have auto_increment
Step 05) In DOS, copy rolando.MYD to pamela.MYD
Step 06) run REPAIR TABLE pamela; (Rebuild pamela.MYI)
Step 07) run SELECT COUNT(1) FROM pamela;
Step 08) run SHOW CREATE TABLE pamela\G
Step 09) run SELECT * FROM pamela;
Step 10) insert 'carlik' into pamela
Step 11) run SELECT * FROM pamela;

Let's see if these steps are kosher.

Here are Steps 1-4

mysql> drop table if exists rolando;
Query OK, 0 rows affected (0.02 sec)

mysql> drop table if exists pamela;
Query OK, 0 rows affected (0.00 sec)

mysql> create table rolando
    -> (
    ->     name varchar(20),
    ->     id int not null auto_increment,
    ->     primary key (id)
    -> ) ENGINE=MyISAM;
Query OK, 0 rows affected (0.05 sec)

mysql> insert into rolando (name) values ('dominique'),('diamond');
Query OK, 2 rows affected (0.00 sec)
Records: 2  Duplicates: 0  Warnings: 0

mysql> select * from rolando;
+-----------+----+
| name      | id |
+-----------+----+
| dominique |  1 |
| diamond   |  2 |
+-----------+----+
2 rows in set (0.00 sec)

mysql> create table pamela like rolando;
Query OK, 0 rows affected (0.05 sec)

mysql> show create table rolando\G
*************************** 1. row ***************************
       Table: rolando
Create Table: CREATE TABLE `rolando` (
  `name` varchar(20) DEFAULT NULL,
  `id` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=latin1
1 row in set (0.00 sec)

mysql> show create table pamela\G
*************************** 1. row ***************************
       Table: pamela
Create Table: CREATE TABLE `pamela` (
  `name` varchar(20) DEFAULT NULL,
  `id` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1 row in set (0.02 sec)

mysql> alter table pamela modify id int(11) unsigned not null;
Query OK, 0 rows affected (0.11 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> show create table pamela\G
*************************** 1. row ***************************
       Table: pamela
Create Table: CREATE TABLE `pamela` (
  `name` varchar(20) DEFAULT NULL,
  `id` int(11) unsigned NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1 row in set (0.00 sec)

mysql> select count(1) from pamela;
+----------+
| count(1) |
+----------+
|        0 |
+----------+
1 row in set (0.01 sec)

mysql>

Here is Step 6

C:\>copy C:\MySQL_5.5.12\data\test\rolando.MYD C:\MySQL_5.5.12\data\test\pamela.MYD
        1 file(s) copied.

C:\>

Here are the rest of the Steps starting at Step 7

mysql> repair table pamela;
+-------------+--------+----------+------------------------------------+
| Table       | Op     | Msg_type | Msg_text                           |
+-------------+--------+----------+------------------------------------+
| test.pamela | repair | warning  | Number of rows changed from 0 to 2 |
| test.pamela | repair | status   | OK                                 |
+-------------+--------+----------+------------------------------------+
2 rows in set (0.03 sec)

mysql> select count(1) from pamela;
+----------+
| count(1) |
+----------+
|        2 |
+----------+
1 row in set (0.00 sec)

mysql> insert into pamela (name,id) values ('carlik',3);
Query OK, 1 row affected (0.00 sec)

mysql> select * from pamela;
+-----------+----+
| name      | id |
+-----------+----+
| dominique |  1 |
| diamond   |  2 |
| carlik    |  3 |
+-----------+----+
3 rows in set (0.00 sec)

mysql>

Dangerous game, isn't it ???

Guess what? Stuff like this is actually published in "High Performance MySQL : Optimization, Backups, Replication, and more", Pages 146-148 under the Subheading Speeding Up ALTER TABLE. Page 147 Paragraph 1 says:

The technique we are about to demonstrate is unsupported, undocumented, and may not work. Use it at your risk. We advise you to back up you data first!

I also had an earlier post when someone ask a similar question : Can I rename the values in a MySQL ENUM column in one query?

You got guts, @atxdba !!!

Mysql – Inserting empty string on Windows MySQL doesn’t use default value

PROBLEM

You need to insert nothing ?

SOLUTION

Then, insert nothing at all ... literally !!!

One of the following will work

INSERT INTO test2 () VALUES (),(),();
INSERT INTO test2 (test) VALUES (NULL),(NULL),(NULL);
INSERT INTO test2 (id) VALUES (NULL),(NULL),(NULL);

SAMPLE DATA

use test
DROP TABLE IF EXISTS test2;
CREATE TABLE test2
(id int not null auto_increment primary key,
test int not null default 0);
SHOW CREATE TABLE test2\G
SELECT * FROM test2;

SAMPLE DATA LOADED

mysql> use test
Database changed
mysql> DROP TABLE IF EXISTS test2;
Query OK, 0 rows affected (0.11 sec)

mysql> CREATE TABLE test2
    -> (id int not null auto_increment primary key,
    -> test int default 0);
Query OK, 0 rows affected (0.34 sec)

mysql> SHOW CREATE TABLE test2\G
*************************** 1. row ***************************
       Table: test2
Create Table: CREATE TABLE `test2` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `test` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
1 row in set (0.00 sec)

mysql> SELECT * FROM test2;
Empty set (0.00 sec)

mysql>

QUERIES EXECUTED

If id and test are the only two columns in the table, the INSERT does not need a column list. If there are other columns in test2 besides id and test, name the test column and insert a NULL. Keep in mind, inserting a NULL into a column that has DEFAULT 0 will become 0.

mysql> SELECT * FROM test2;
Empty set (0.00 sec)

mysql> INSERT INTO test2 () VALUES (),(),();
Query OK, 3 rows affected (0.03 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> INSERT INTO test2 (test) VALUES (NULL),(NULL),(NULL);
Query OK, 3 rows affected, 3 warnings (0.06 sec)
Records: 3  Duplicates: 0  Warnings: 3

mysql> INSERT INTO test2 (id) VALUES (NULL),(NULL),(NULL);
Query OK, 3 rows affected (0.06 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> SELECT * FROM test2;
+----+------+
| id | test |
+----+------+
|  1 |    0 |
|  2 |    0 |
|  3 |    0 |
|  4 |    0 |
|  5 |    0 |
|  6 |    0 |
|  7 |    0 |
|  8 |    0 |
|  9 |    0 |
+----+------+
9 rows in set (0.00 sec)

mysql>

GIVE IT A TRY !!!

CAVEAT #1 : I did this in Windows 8.1 from the command line

mysql> select * from information_schema.global_variables
    -> where variable_name like 'version%';
+-------------------------+------------------------------+
| VARIABLE_NAME           | VARIABLE_VALUE               |
+-------------------------+------------------------------+
| VERSION_COMMENT         | MySQL Community Server (GPL) |
| VERSION_COMPILE_MACHINE | x86_64                       |
| VERSION_COMPILE_OS      | Win64                        |
| VERSION                 | 5.6.15                       |
+-------------------------+------------------------------+
4 rows in set (0.07 sec)

mysql>

CAVEAT #2 : I am using MySQL's default SQL mode. Thus, I did not need to disable anything.