https://dev.mysql.com/performance-schema-status-monitoring.html
INSTALL PLUGIN plugin_a; The server detects that the 40 instruments are already defined, so no new instruments are created, and previously assigned internal memory buffers are reused. The Performance_schema_mutex_classes_lost status variable is the ...Names for these variables have several forms: Performance_schema_xxx_classes_lost indicates how many instruments of type xxx could not be ...
https://dev.mysql.com/date-and-time-functions.html
If you want to subtract UNIX_TIMESTAMP() columns, you might want to cast them to signed integers. This section describes the functions that can be used to manipulate temporal values. See Section 11.3, “Date and Time Types”, for a description of ...
https://dev.mysql.com/mysql-cluster-programs-ndb-setup-py.html
ndb_setup.py starts the NDB Cluster Auto-Installer and opens the installer's Start page in the default Web browser. Important This program is intended to be invoked as a normal user, and not with the mysql, system root or other administrative ...
https://dev.mysql.com/keywords.html
Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as table and column names. This may also be true for the names of built-in functions. Reserved words are permitted as ...
https://dev.mysql.com/disk-issues.html
NFS Version 2 clients can only access the lowest 2GB of a file (signed 32 bit offset). This section describes ways to configure storage devices when you can devote more and faster storage hardware to the database server. For information about ...
https://dev.mysql.com/mysql-stmt-prepare.html
int mysql_stmt_prepare(MYSQL_STMT *stmt, const char *stmt_str, unsigned long length) Given the statement handler returned by mysql_stmt_init(), prepares the SQL statement pointed to by the string stmt_str and returns a status value. However, they ...You should not add a terminating semicolon (;) or \g to the ...
https://dev.mysql.com/udf-calling.html
unsigned int decimals The number of decimal digits to the right of the decimal point. (For numeric functions, the length includes any sign or decimal point characters.) If you want to return a blob value, you can set max_length to 65KB or 16MB.
https://dev.mysql.com/using-log-files.html
It is not a good sign if mysqld did die unexpectedly, but in this case, you should not investigate the Checking table... Note that before starting mysqld with the general query log enabled, you should check all your tables with myisamchk. If mysqld ...
https://dev.mysql.com/docker-mysql-getting-started.html
Warning The MySQL Docker images maintained by the MySQL team are built specifically for Linux platforms. Other platforms are not supported, and users using these MySQL Docker images on them are doing so at their own risk. See the discussion here ...
https://dev.mysql.com/sql-mode.html
NO_UNSIGNED_SUBTRACTION Subtraction between integer values, where one is of type UNSIGNED, produces an unsigned result by default. When NO_UNSIGNED_SUBTRACTION is enabled, the subtraction result is signed, even if any operand is unsigned. The MySQL ...
