转: MySQL5.7 ERROR 1142 (42000)问题


1,mysql全库导入报错


[root@dev_121_21 ~]# mysql--socket=/usr/local/mysql/mysql.sock --default-character-set=utf8

ERROR 1142 (42000) at line 266079: SELECT,LOCK TABLES command denied to user 'root'@'localhost' for table 'accounts'


[root@dev_121_21 ~]#


2,查看accounts表


mysql> SELECT * FROM information_schema.`TABLES` t WHERE t.`TABLE_NAME`='accounts'\G;
*************************** 1. ROW ***************************
  TABLE_CATALOG: def
   TABLE_SCHEMA: performance_schema
     TABLE_NAME: accounts
     TABLE_TYPE: BASE TABLE
         ENGINE: PERFORMANCE_SCHEMA
        VERSION: 10
     ROW_FORMAT: FIXED
     TABLE_ROWS: 1000
 AVG_ROW_LENGTH: 0
    DATA_LENGTH: 0
MAX_DATA_LENGTH: 0
   INDEX_LENGTH: 0
      DATA_FREE: 0
 AUTO_INCREMENT: NULL
    CREATE_TIME: NULL
    UPDATE_TIME: NULL
     CHECK_TIME: NULL
TABLE_COLLATION: utf8_general_ci
       CHECKSUM: NULL
 CREATE_OPTIONS:
  TABLE_COMMENT:
1ROWINSET (0.00 sec)
 
ERROR:
NOQUERY specified
 
mysql>
 
mysql> USE performance_schema
DATABASE CHANGED
mysql> SHOWCREATETABLE accounts;
+----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| TABLE    | CREATETABLE                                                                                                                                                                                                                                                                                              |
+----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| accounts | CREATETABLE `accounts` (
  `USER` CHAR(16) CHARACTERSET utf8 COLLATE utf8_bin DEFAULTNULL,
  `HOST` CHAR(60) CHARACTERSET utf8 COLLATE utf8_bin DEFAULTNULL,
  `CURRENT_CONNECTIONS` BIGINT(20) NOTNULL,
  `TOTAL_CONNECTIONS` BIGINT(20) NOTNULL
) ENGINE=PERFORMANCE_SCHEMA DEFAULTCHARSET=utf8 |
+----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1ROWINSET (0.00 sec)
 
mysql>


看到ENGINE:PERFORMANCE_SCHEMA,accounts表不是正常的innodb存储引擎表,查了下资料,发现是由于5.5以后,mysql的performance_schema库用的是特殊的存储引擎PERFORMANCE_SCHEMA,在mysql运行的时候,这个表是不允许被锁定的;


而这个性能库不导入也没用关系,不影响数据一致性,那我们备份时跳过该库即可,需要重新备份,然后再重新导入。


3,重新备份的2种方案


(1)运用--skip-lock-tables导出的时候不lock tables,然后mysql导入:


mysql -uroot--password="root@plcc0716" -e 'show databases;'|grep -E -v"Database|information_schema|test" |xargs mysqldump -uroot--password="root@plcc0716" --opt --default-character-set=utf8--extended-insert=false --single-transaction -R --flush-logs --skip-lock-tablesperformance_schema --master-data=1 --databases>/home/alldb_20160605.sql


(2)忽略该性能库(本次操作选择这种方案)


mysqldjmp、mysql -uroot--password="root@plcc0716" -e 'show databases;'|grep -E -v"Database|information_schema|performance_schema" |xargs  mysqldump -uroot --password="root@plcc0716"--opt --default-character-set=utf8 --extended-insert=false --single-transaction-R --flush-logs --skip-lock-tables --master-data=1--databases>/home/alldb_20160605.sql


4,再次mysql导入成功


[root@dev_121_21 ~]# time mysql--socket=/usr/local/mysql/mysql.sock --default-character-set=utf8 -uroot -p

Enter password:


real         20m10.619s


user        2m35.341s


sys          1m13.020s


[root@dev_121_21 ~]#


然后mysql导入,导入成功,所以在备份的时候,记得忽略这个存储库表列基础信息的information_schema库和mysql运行信息的performance_schema性能库。
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