SHOW STORAGE UNITS

描述

SHOW STORAGE UNITS 语法用于查询指定逻辑库已经注册的存储单元。

语法

语法 铁路图

  1. ShowStorageUnit ::=
  2. 'SHOW' 'STORAGE' 'UNITS' ('WHERE' 'USAGE_COUNT' '=' usageCount)? ('FROM' databaseName)?
  3. usageCount ::=
  4. int
  5. databaseName ::=
  6. identifier

特别说明

  • 未指定 databaseName 时,默认是当前使用的 DATABASE; 如未使用 DATABASE 则会提示 No database selected

返回值说明

说明
name存储单元名称
type存储单元类型
host存储单元地址
port存储单元端口
db数据库名称
attribute存储单元参数

示例

  • 查询指定逻辑库中未被使用的存储单元
  1. SHOW STORAGE UNITS WHERE USAGE_COUNT = 0 FROM sharding_db;
  1. mysql> SHOW STORAGE UNITS WHERE USAGE_COUNT = 0 FROM sharding_db;
  2. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  3. | name | type | host | port | db | connection_timeout_milliseconds | idle_timeout_milliseconds | max_lifetime_milliseconds | max_pool_size | min_pool_size | read_only | other_attributes |
  4. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  5. | ds_1 | MySQL | 127.0.0.1 | 3306 | db1 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  6. | ds_0 | MySQL | 127.0.0.1 | 3306 | db0 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  7. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  8. 2 rows in set (0.03 sec)
  • 查询当前逻辑库中未被使用的存储单元
  1. SHOW STORAGE UNITS WHERE USAGE_COUNT = 0;
  1. mysql> SHOW STORAGE UNITS WHERE USAGE_COUNT=0;
  2. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  3. | name | type | host | port | db | connection_timeout_milliseconds | idle_timeout_milliseconds | max_lifetime_milliseconds | max_pool_size | min_pool_size | read_only | other_attributes |
  4. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  5. | ds_1 | MySQL | 127.0.0.1 | 3306 | db1 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  6. | ds_0 | MySQL | 127.0.0.1 | 3306 | db0 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  7. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  8. 2 rows in set (0.01 sec)
  • 查询指定逻辑库的存储单元
  1. SHOW STORAGE UNITS FROM sharding_db;
  1. mysql> SHOW STORAGE UNITS FROM sharding_db;
  2. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  3. | name | type | host | port | db | connection_timeout_milliseconds | idle_timeout_milliseconds | max_lifetime_milliseconds | max_pool_size | min_pool_size | read_only | other_attributes |
  4. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  5. | ds_1 | MySQL | 127.0.0.1 | 3306 | db1 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  6. | ds_0 | MySQL | 127.0.0.1 | 3306 | db0 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  7. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  8. 2 rows in set (0.01 sec)
  • 查询当前逻辑库的存储单元
  1. SHOW STORAGE UNITS;
  1. mysql> SHOW STORAGE UNITS;
  2. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  3. | name | type | host | port | db | connection_timeout_milliseconds | idle_timeout_milliseconds | max_lifetime_milliseconds | max_pool_size | min_pool_size | read_only | other_attributes |
  4. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  5. | ds_1 | MySQL | 127.0.0.1 | 3306 | db1 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  6. | ds_0 | MySQL | 127.0.0.1 | 3306 | db0 | 30000 | 60000 | 2100000 | 50 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false} |
  7. +------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  8. 2 rows in set (0.00 sec)

保留字

SHOWSTORAGEUNITSWHEREUSAGE_COUNTFROM

相关链接