Retro Eye care Haitian Deep Dark Default

SHOW SHARDING TABLE NODES

Description

SHOW SHARDING TABLE NODES syntax is used to query sharding table nodes in specified database.

Syntax

ShowShardingTableNode::=
  'SHOW' 'SHARDING' 'TABLE' 'NODES' tableName? ('FROM' databaseName)?

tableName ::=
  identifier

databaseName ::=
  identifier

Supplement

  • When databaseName is not specified, the default is the currently used DATABASE. If DATABASE is not used, No database selected will be prompted.

Return value description

Columns Descriptions
name Sharding rule name
nodes Sharding nodes

Example

  • Query sharding table nodes for specified table in the specified logical database
SHOW SHARDING TABLE NODES t_order_item FROM sharding_db;

mysql> SHOW SHARDING TABLE NODES t_order_item FROM sharding_db;
+--------------+------------------------------------------------------------------------------------------------------------+
| name         | nodes                                                                                                      |
+--------------+------------------------------------------------------------------------------------------------------------+
| t_order_item | resource_0.t_order_item_0, resource_0.t_order_item_1, resource_1.t_order_item_0, resource_1.t_order_item_1 |
+--------------+------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
  • Query sharding table nodes for specified table in the current logical database
SHOW SHARDING TABLE NODES t_order_item;

mysql> SHOW SHARDING TABLE NODES t_order_item;
+--------------+------------------------------------------------------------------------------------------------------------+
| name         | nodes                                                                                                      |
+--------------+------------------------------------------------------------------------------------------------------------+
| t_order_item | resource_0.t_order_item_0, resource_0.t_order_item_1, resource_1.t_order_item_0, resource_1.t_order_item_1 |
+--------------+------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec
  • Query sharding table nodes for all tables in the specified logical database
SHOW SHARDING TABLE NODES FROM sharding_db;

mysql> SHOW SHARDING TABLE NODES FROM sharding_db;
+--------------+------------------------------------------------------------------------------------------------------------+
| name         | nodes                                                                                                      |
+--------------+------------------------------------------------------------------------------------------------------------+
| t_order_item | resource_0.t_order_item_0, resource_0.t_order_item_1, resource_1.t_order_item_0, resource_1.t_order_item_1 |
+--------------+------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
  • Query sharding table nodes for all tables in the current logical database
SHOW SHARDING TABLE NODES;

mysql> SHOW SHARDING TABLE NODES;
+--------------+------------------------------------------------------------------------------------------------------------+
| name         | nodes                                                                                                      |
+--------------+------------------------------------------------------------------------------------------------------------+
| t_order_item | resource_0.t_order_item_0, resource_0.t_order_item_1, resource_1.t_order_item_0, resource_1.t_order_item_1 |
+--------------+------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec

Reserved word

SHOW, SHARDING, TABLE, NODES, FROM