如果是create table like,则execute command的时候会调用mysql_create_like_table,这里会打开源表(like之后的表,open_tables());之后开始开始创建新的表定义文件,创建新的表定义文件前会持有LOCK_open,创建完就释放;如果源表是information_schema的表,则通过mysql_create_like_schema_frm()创建,其它的则通过my_copy...
The DB in which I'm trying to create the table is set up as a symbolic link due to storage concerns--datadir exists on `/var/lib/mysql`, db `op` points to datastore on an external drive (see details from command line below). ...
mysql_create_table_no_lock(), create_table_impl(), rea_create_base_table(). Execution of this code is the runtime implementation of the CREATE TABLE statement, and eventually leads to: dd::create_table(), to create the table in the Data Dictionary, ...
当主从复制采用 binlog 的行模式时,如果从库启用 slow_query_log、log_slow_replica_statements 且从库重放 CREATE TABLE、DROP TABLE 时因特殊情况(比如被从库其他 SQL 占用 MDL 锁)执行耗时较长,会被从库记录到慢日志(slow log),而 ALTER TABLE 却不会被记录到慢日志。 ALTER TABLE 等管理语句是否会记录到...
A table can have only one PRIMARY KEY. The name of a PRIMARY KEY is always PRIMARY, which thus cannot be used as the name for any other kind of index. If you do not have a PRIMARY KEY and an application asks for the PRIMARY KEY in your tables, MySQL returns the first UNIQUE ...
mybatis进行数据库建表 CREATE command denied to user 'root'@'127.0.0.1' for table 问题 产生原因: 数据库没有给用户相应的权限,查询mysql的user表,就会发现建表权限为:N。 解决办法: 给相就的帐号赋予权限。 执行语句: updateusersetSelect_priv='Y',Insert_priv='Y',Update_priv='Y',Delete_priv='...
tbl 的重放(会处于 Waiting for table metadata lock 状态): # begin; select count(*) from db1.tbl for update; # 等待几秒后(大于long_query_time的配置即可),再 commit set global slow_query_log=on; set global log_slow_replica_statements=on; mysql> show variables like '%slow%'; +---+-...
1. create table table1 as select * from table2 where 1=2; 创建一个表结构与table2一模一样的表,只复制结构不复制数据; 2.create table table1 as select * from table2 ; 创建一个表结构与table2一模一样的表,复制结构同时也复制数据;
今天在表中用Navicat连接服务器上的mysql账号进行建表,报了个这样类似的错, CREATE command denied to user for table 是数据库权限设置的问题,所以无法进行创建。只需给对应账户,赋予所有的权限即可: mysql>grant all privileges on data.* to work; //data是数据库,work是操纵data的用户 ...
CREATE TABLE aa ( id smallint(6) NOT NULL DEFAULT '0', runtime int(11) NOT NULL DEFAULT '0', PRIMARY KEY idx1 (id) USING HASH) ENGINE=NDB; The documentation says one command per line and no comments, so that create table is one long line up to the semicolon Thank you, PH...