DROP SHARDING ALGORITHM

Description

The DROP SHARDING ALGORITHM syntax is used to drop sharding algorithm for specified database.

Syntax

Grammar Railroad diagram

DropShardingAlgorithm ::=
  'DROP' 'SHARDING' 'ALGORITHM' shardingAlgorithmName ifExists? ('FROM' databaseName)?
ifExists ::=
  'IF' 'EXISTS'
shardingAlgorithmName ::=
  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;
• ifExists clause used for avoid Sharding algorithm not exists error.

Example

• Drop sharding algorithm for specified database

DROP SHARDING ALGORITHM t_order_hash_mod FROM sharding_db;

• Drop sharding algorithm for current database

DROP SHARDING ALGORITHM t_order_hash_mod;

• Drop sharding algorithm with ifExists clause

DROP SHARDING ALGORITHM IF EXISTS t_order_hash_mod;

Reserved word

DROP, SHARDING, ALGORITHM, FROM

Related links

• Reserved word