转: MySQL5.7 ERROR 1142 (42000)问题

Posted 2021-02-05 ⬆️小马哥⬆️

1，mysql全库导入报错

[[email protected]_121_21 ~]# mysql--socket=/usr/local/mysql/mysql.sock --default-character-set=utf8</home/alldb_20160605.sql

 

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

[[email protected]_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="[email protected]" -e ‘show databases;‘|grep -E -v"Database|information_schema|test" |xargs mysqldump -uroot--password="[email protected]" --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="[email protected]" -e ‘show databases;‘|grep -E -v"Database|information_schema|performance_schema" |xargs  mysqldump -uroot --password="[email protected]"--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

[[email protected]_121_21 ~]# time mysql--socket=/usr/local/mysql/mysql.sock --default-character-set=utf8 -uroot -p</home/alldb_20160605.sql

Enter password:

 

real         20m10.619s

user        2m35.341s

sys          1m13.020s

[[email protected]_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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