[mysql] How to turn on/off MySQL strict mode in localhost (xampp)?

I want to know how to check whether MySQL strict mode is on or off in localhost(xampp).

If on then for what modes and how to off.

If off then how to on.

I already followed http://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sql-mode-full and https://mariadb.com/kb/en/mariadb/sql_mode/ and other related sites too. But I didn't get an exact answer for my question.

This question is related to mysql xampp localhost mariadb mariasql

The answer is


To Change it permanently in ubuntu do the following

in the ubuntu command line

sudo nano /etc/mysql/my.cnf

Then add the following

[mysqld]
sql_mode=

First, check whether the strict mode is enabled or not in mysql using:

     SHOW VARIABLES LIKE 'sql_mode';

If you want to disable it:

     SET sql_mode = '';

or any other mode can be set except the following. To enable strict mode:

     SET sql_mode = 'STRICT_TRANS_TABLES';

You can check the result from the first mysql query.


To change it permanently in Windows (10), edit the my.ini file. To find the my.ini file, look at the path in the Windows server. E.g. for my MySQL 5.7 instance, the service is MYSQL57, and in this service's properties the Path to executable is:

"C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe" --defaults-file="C:\ProgramData\MySQL\MySQL Server 5.7\my.ini" MySQL57

I.e. edit the my.ini file in C:\ProgramData\MySQL\MySQL Server 5.7\. Note that C:\ProgramData\ is a hidden folder in Windows (10). My file has the following lines of interest:

# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

Remove STRICT_TRANS_TABLES, from this sql-mode line, save the file and restart the MYSQL57 service. Verify the result by executing SHOW VARIABLES LIKE 'sql_mode'; in a (new) MySQL Command Line Client window.

(I found the other answers and documents on the web useful, but none of them seem to tell you where to find the my.ini file in Windows.)


For ubuntu :

  • Once you are connected to your VPS via SSH, please try connecting to your mysql with "root"

user: mysql -u root -p

  • Enter "root" user password and you will be in the mysql environment (mysql>), then simply check what is sql_mode, with the following command:

    SHOW VARIABLES LIKE 'sql_mode';

Basically, you will see the table as your result, if the table has a value of STRICT_TRANS_TABLES, it means that this option is enabled, so you need to remove the value from this table with the following command:

set global sql_mode='';

This will set your table's value to empty and disable this setting. Like this:

 +---------------+-------+
 | Variable_name | Value |
 +---------------+-------+
 | sql_mode      |       |
 +---------------+-------+

Please make sure to perform these commands within the MySQL environment and not simply via SSH. I think this moment was missed in the article provided below and the author assumes that the reader understands it intuitively.


on server console:

$ mysql -u root -p -e "SET GLOBAL sql_mode = 'NO_ENGINE_SUBSTITUTION';" 

on Debian 10 I start mysql from ./opt/lampp/xampp start

I do strace ./opt/lampp/sbin/mysqld and see that my.cnf is there:

stat("/opt/lampp/etc/my.cnf", {st_mode=S_IFREG|0644, st_size=5050, ...}) = 0
openat(AT_FDCWD, "/opt/lampp/etc/my.cnf", O_RDONLY|O_CLOEXEC) = 3

hence, I add sql_mode config to /opt/lampp/etc/my.cnf instead of /etc/mysql/my.cnf


I want to know how to check whether MySQL strict mode is on or off in localhost(xampp).

SHOW VARIABLES LIKE 'sql_mode';

If result has "STRICT_TRANS_TABLES", then it's ON. Otherwise, it's OFF.

If on then for what modes and how to off.

If off then how to on.

For Windows,

  1. Go to C:\Program Files\MariaDB XX.X\data
  2. Open the my.ini file.
  3. *On the line with "sql_mode", modify the value to turn strict mode ON/OFF.
  4. Save the file
  5. **Restart the MySQL service
  6. Run SHOW VARIABLES LIKE 'sql_mode' again to see if it worked;

*3.a. To turn it ON, add STRICT_TRANS_TABLES on that line like this: sql_mode=STRICT_TRANS_TABLES. *If there are other values already, add a comma after this then join with the rest of the value.

*3.b. To turn it OFF, simply remove STRICT_TRANS_TABLES from value. *Remove the additional comma too if there is one.

**6. To restart the MySQL service on your computer,

  1. Open the Run command window (press WINDOWS + R button).
  2. Type services.msc
  3. Click OK
  4. Right click on the Name MySQL
  5. Click Restart

In my case, I need to add:

sql_mode="STRICT_TRANS_TABLES"

under [mysqld] in the file my.ini located in C:\xampp\mysql\bin.


Check the value with

SELECT @@GLOBAL.sql_mode;

then clear the @@global.sql_mode by using this command:

SET @@GLOBAL.sql_mode=''

You can check the local and global value of it with:

SELECT @@SQL_MODE, @@GLOBAL.SQL_MODE;

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