5.直接输入 mysql 并回车,如果成功,将出现MySQL提示符 > 复制代码 代码如下: C:\Users\Administrator>cd C:\Program Files\MySQL\MySQL Server 5.5\bin C:\Program Files\MySQL\MySQL Server 5.5\bin>mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server...
MySQL9.1.0 Source Code Documentation Class that represents the ALTER TABLE t1 EXCHANGE PARTITION p WITH TABLE t2 statement.More... #include <sql_partition_admin.h> Inheritance diagram for Sql_cmd_alter_table_exchange_partition: [legend]
MySQL9.1.0 Source Code Documentation Public Member Functions|List of all members Sql_cmd_alter_table_repair_partition Class Referencefinal Class that represents the ALTER TABLE t1 REPAIR PARTITION p statement.More... #include <sql_partition_admin.h> ...
直接在原生的MySQL中执行ALTER语句加两个字段,而且是一张张空表,业务请求量也不高,一秒一个ALTER。遗憾的是,业务曲线还是惊人的抖动了,简直没法玩啊。 源码分析 老规矩,先上火焰图,如下, ALTER语句 重点关注如下, Sql_cmd_alter_table::execute:2060samples,32.54%// 一般的alter table语句入口函数buf_flush_or...
# SQL 入口 mysql_execute_command() // sql/sql_parse.cc → Sql_cmd_alter_table::execute() // sql/sql_alter.cc → ha_innobase::alter_table() // storage/innobase/handler/ha_innodb.cc → ha_innopart::drop_partitions() // storage/innobase/handler/ha_innopart.cc → ha_innopart::drop...
mysql的ALTER VIEW Statement的功能描述 一.数据的增删改查 1.插入数据 a.插入完整数据(顺序插入) INSERT INTO 表名(字段1,字段2,字段3…字段n) VALUES(值1,值2,值3…值n); INSERT INTO 表名 VALUES (值1,值2,值3…值n); 1. 2. b.指定字段插入数据...
今天用navicat连接数据库MySQL,出现了连接错误,your passward has expired to log in you must change it using a client that supports expired passwards,说的是密码已经过期。 所以我到cmd下修改MySQL的root用户的密码。 网上查了下,有人说让我用这条语句修改 :set passwor...多...
_buffer_size=262144 max_used_connections=59 max_threads=0 thread_count=2 connection_count=2 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 50446 K bytes of memory Hope that's ok; if not, decrease some variables in ...
问题:PHPMYADMIN初始化页面显示 mysqli_real_connect(): (HY000/1045): Access denied for user 'root'@'localhost' (using password: YES) 使用配置文件中定义的控制用户连接失败。 解决办法: 在phpmyadmin的目录下编辑config.inc.php文件将这2行改为对...MYSQL...
mysqlcom-pro-5.6.31/sql/sql_table.cc:8511 #13 0x00000000009c0c35 in Sql_cmd_alter_table::execute (this=0x7f4dd8005708, thd=0x2cd2de0) at /export/home/pb2/build/sb_0-18928004-1463437877.21/mysqlcom-pro-5.6.31/sql/sql_alter.cc:313 #14 0x0000000000803cf1 in mysql_execute_command (...