MariaDB check mysql strict mode

arlon · Nov 15, 2016

i'm using mariadb 10.0.28 and i have a problem when backing up my database using CMS, i have contacted my developer that i must disable mysql strict mode, how to check my database strict mode? and how to disable it?

eva2000 · Nov 15, 2016

What errors you getting during backup ? What CMS is it ?

You should always for reliability use mysqldump to backup mysql data and not rely on php interfaced mysql backups as they can timeout or result in incomplete backups.

MariaDB does NOT set STRICT_TRANS_TABLES or STRICT_ALL_TABLES sql modes by default so shouldn't cause problems. What's output of this command
Code (Text):
mysqladmin var | grep sql_mode | tr -s ' '
you should get something like this without STRICT_TRANS_TABLES, STRICT or STRICT_ALL_TABLES sql modes listed
Code (Text):
mysqladmin var | grep sql_mode | tr -s ' '
| sql_mode | NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
MySQL :: MySQL 5.6 Reference Manual :: A.3 MySQL 5.6 FAQ: Server SQL Mode

MySQL :: MySQL 5.6 Reference Manual :: 5.1.8 Server SQL Modes

Strict SQL Mode
Strict mode controls how MySQL handles invalid or missing values in data-change statements such as INSERT or UPDATE. A value can be invalid for several reasons. For example, it might have the wrong data type for the column, or it might be out of range. A value is missing when a new row to be inserted does not contain a value for a non-NULL column that has no explicit DEFAULT clause in its definition. (For a NULL column, NULL is inserted if the value is missing.) Strict mode also affects DDL statements such as CREATE TABLE.

If strict mode is not in effect, MySQL inserts adjusted values for invalid or missing values and produces warnings (see Section 13.7.5.41, “SHOW WARNINGS Syntax”). In strict mode, you can produce this behavior by using INSERT IGNORE or UPDATE IGNORE.

For statements such as SELECT that do not change data, invalid values generate a warning in strict mode, not an error.

As of MySQL 5.6.11, strict mode produces an error for attempts to create a key that exceeds the maximum key length. Previously, this resulted in a warning and truncation of the key to the maximum key length (the same as when strict mode is not enabled).

Strict mode does not affect whether foreign key constraints are checked. foreign_key_checks can be used for that. (See Section 5.1.5, “Server System Variables”.)

Strict SQL mode is in effect if either STRICT_ALL_TABLES or STRICT_TRANS_TABLES is enabled, although the effects of these modes differ somewhat:
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MariaDB check mysql strict mode

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MariaDB check mysql strict mode

arlon Member

eva2000 Administrator Staff Member

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