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SHOW UNUSED SHARDING KEY GENERATORS

Description

SHOW SHARDING KEY GENERATORS syntax is used to query sharding key generators that are not used in specified database.

Syntax

ShowShardingKeyGenerators::=
  'SHOW' 'SHARDING' 'KEY' 'GENERATOR'('FROM' databaseName)?

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

column Description
name Sharding key generator name
type Sharding key generator type
props Sharding key generator properties

Example

  • Query sharding key generators that are not used in the specified logical database
SHOW UNUSED SHARDING KEY GENERATORS FROM test1;

mysql> SHOW UNUSED SHARDING KEY GENERATORS FROM test1;
+-------------------------+-----------+-------+
| name                    | type      | props |
+-------------------------+-----------+-------+
| snowflake_key_generator | snowflake |       |
+-------------------------+-----------+-------+
1 row in set (0.00 sec)
  • Query sharding key generators that are not used in the current logical database
SHOW UNUSED SHARDING KEY GENERATORS;

mysql> SHOW UNUSED SHARDING KEY GENERATORS;
+-------------------------+-----------+-------+
| name                    | type      | props |
+-------------------------+-----------+-------+
| snowflake_key_generator | snowflake |       |
+-------------------------+-----------+-------+
1 row in set (0.00 sec)

Reserved word

SHOW, UNUSED, SHARDING, KEY, GENERATORS, FROM