Question

我通过以下链接安装了mysql - ＆＃34; https://www3.ntu.edu.sg/home/ehchua/programming/sql/MySQL_HowTo.html＆＃34;。当我尝试通过命令启动mysql时，我收到以下错误

E:\mysql folder\mysql\bin>mysqld --console
2015-03-23 00:54:03 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-03-23 00:54:03 4040 [Note] InnoDB: Using atomics to ref count buffer pool pages
2015-03-23 00:54:03 4040 [Note] InnoDB: The InnoDB memory heap is disabled
2015-03-23 00:54:03 4040 [Note] InnoDB: Mutexes and rw_locks use Windows nterlocked functions
2015-03-23 00:54:03 4040 [Note] InnoDB: Memory barrier is not used
2015-03-23 00:54:03 4040 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-03-23 00:54:03 4040 [Note] InnoDB: Not using CPU crc32 instructions
2015-03-23 00:54:03 4040 [Note] InnoDB: Initializing buffer pool, size =128.0M
2015-03-23 00:54:03 4040 [Note] InnoDB: Completed initialization of buffer pool
2015-03-23 00:54:03 4040 [ERROR] InnoDB: .\ibdata1 can't be opened in read-write mode
2015-03-23 00:54:03 4040 [ERROR] InnoDB: The system tablespace must be writable!

2015-03-23 00:54:03 4040 [ERROR] Plugin 'InnoDB' init function returned error.
2015-03-23 00:54:03 4040 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2015-03-23 00:54:03 4040 [ERROR] Unknown/unsupported storage engine: InnoDB
2015-03-23 00:54:03 4040 [ERROR] Aborting
 2015-03-23 00:54:03 4040 [Note] Binlog end
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'partition'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_FIELDS'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_INDEXES'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_SYS_TABLES'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_FT_CONFIG'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_FT_DELETED'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin'INNODB_FT_DEFAULT_STOPWORD'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_METRICS'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET'
 2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_CMPMEM'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_CMP_RESET'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_CMP'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_LOCK_WAITS'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_LOCKS'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'INNODB_TRX'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'FEDERATED'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'BLACKHOLE'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'ARCHIVE'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'MRG_MYISAM'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'MyISAM'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'MEMORY'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'CSV'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'sha256_password'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'mysql_old_password'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'mysql_native_password'
2015-03-23 00:54:03 4040 [Note] Shutting down plugin 'binlog'
2015-03-23 00:54:03 4040 [Note] mysqld: Shutdown complete

此外，当我启动rails服务器时，它向我显示此错误 - ＆＃34;无法连接到本地主机上的MySQL服务器＆＃39; （10061）＆＃34;，我猜它是因为服务器没有运行。如何启动mysql服务器？

Answer 1

好像你需要enable the explicit_defaults_for_timestamp system variable去除那个警告。

来自MySQL 5.6的官方文档：

[Warning] TIMESTAMP with implicit DEFAULT value is deprecated.
Please use --explicit_defaults_for_timestamp server option (see
documentation for more details).
As indicated by the warning, to turn off the nonstandard behaviors,
enable the new explicit_defaults_for_timestamp system variable at
server startup. With this variable enabled, the server handles
TIMESTAMP as follows instead:

未显式声明为NOT NULL的TIMESTAMP列允许NULL   值。将此列设置为NULL会将其设置为NULL，而不是当前   时间戳。

没有为TIMERMAMP列分配DEFAULT CURRENT_TIMESTAMP或ON   自动更新CURRENT_TIMESTAMP属性。那些属性   必须明确指定。

TIMESTAMP列声明为NOT NULL且没有显式DEFAULT   子句被视为没有默认值。对于插入的行   为这样的列指定没有显式值，结果取决于   SQL模式。如果启用了严格的SQL模式，则会发生错误。如果严格   未启用SQL模式，将为该列分配隐式默认值   '0000-00-00 00:00:00'并发出警告。这与如何相似   MySQL处理其他时间类型，例如DATETIME。

Answer 2

重新启动后，mysql服务器开始运行，然后错误仍然存在＆＃34;无法连接到本地主机上的MySQL服务器＆＃39; （10061）＆＃34 ;.它通过在database.yml文件中添加端口8888来解决。

启动ror应用程序时无法连接到mysql

2 个答案: