MySQL Stored Procedures : Use a variable as the database name in a cursor declarationPosted by: Vijay Jadhav Date: January 13, 2010 06:22AM I need to use a variable to indicate what database to query in the declaration of a cursor. Here is a short snippet of the code : CREATE ...
mysql > DELIMITER // mysql > CREATE PROCEDURE proc1 --name存储过程名 -> (IN parameter1 INTEGER) -> BEGIN -> DECLARE variable1 CHAR(10); -> IF parameter1 = 17 THEN -> SET variable1 = 'birds'; -> ELSE -> SET variable1 = 'beasts'; -> END IF; -> INSERT INTO table1 VALUES ...
'table_open_cache';+---+---+| Variable_name | Value |+---+---+| table_open_cache | 16384 |+---+---+MYSQL >show global status like '%open%tables%';+---+---+| Variable_name | Value |+---+---+| Open_tables | 16384 || Opened_tables | 401374 |+---...
/home/application/mysql/app/bin/mysqldump -uroot -p --routines --set-gtid-purged=OFF --databases XXX1 XXX2 > /root/all-database-20231026.sql 3、优雅的停止数据库 # 进入原5.7 mysql命令行 正确关闭数据库 [root@srebro.cn ~]# mysql -uroot -p'srebro' mysql> select version(); +---+ ve...
To determine whether your table cache is too small, check the Opened_tables status variable, which indicates the number of table-opening operations since the server started: mysql>SHOW GLOBAL STATUSLIKE'Opened_tables';+---+---+|Variable_name|Value|+---+---+|Opened_tables|2741|+---+---...
DB::Exception: Load job 'startup MaterializedMySQL database test_mysql' failed: Code: 537. DB::Exception: Illegal MySQL variables, the MaterializedMySQL engine requires default_authentication_plugin='mysql_native_password'. (ILLEGAL_MYSQL_VARIABLE),. (ASYNC_LOAD_FAILED) (version 24.1.8.22 (officia...
mysql> set global max_connections=10;Query OK, 0 rows affected (0.01 sec)mysql> show variables like '%max_conn%';+---+---+| Variable_name | Value |+---+---+| max_connect_errors | 100 || max_connections | 10 |+---+---+2 rows in set ...
-O, --set-variable=name //设置变量用法是--set-variable=var_name=var_value --sigint-ignore //忽视SIGINT符号(登录退出时Control-C的结果) -o, --one-database //忽视除了为命令行中命名的默认数据库的语句。可以帮跳过日志中的其它数据库的更新。
db - a string of the database the field came from. table - a string of the table the field came from. name - a string of the field name. type - a string of the field type in all caps. length - a number of the field length, as given by the database. The next argument is ...
VARIABLE_NAME:全局状态变量名称 VARIABLE_VALUE:全局状态变量统计值 对于系统变量,查询的方式还可以使用 "select语句+@@variable_name" 的方式,如下: # 查询全局级别系统变量 select @@global.optimizer_switch; # 查询会话级别系统变量 select @@session.optimizer_switch; ...