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ALTER DB_DISCOVERY RULE

描述

ALTER DB_DISCOVERY RULE 语法用于修改数据库发现规则

语法定义

AlterDatabaseDiscoveryRule ::=
  'ALTER' 'DB_DISCOVERY' 'RULE' databaseDiscoveryDefinition ( ',' databaseDiscoveryDefinition)*

databaseDiscoveryDefinition ::=
    ruleName '(' 'STORAGE_UNITS' '(' storageUnitName ( ',' storageUnitName )* ')' ',' 'TYPE' '(' 'NAME' '=' typeName ( ',' 'PROPERTIES' 'key' '=' 'value' ( ',' 'key' '=' 'value' )* )? ',' 'HEARTBEAT' '(' 'key' '=' 'value' ( ',' 'key' '=' 'value' )* ')' ')' 
        
ruleName ::=
  identifier

storageUnitName ::=
  identifier

typeName ::=
  identifier

discoveryHeartbeatName ::=
  identifier

补充说明

  • discoveryType 指定数据库发现服务类型，ShardingSphere 内置支持 MySQL.MGR；

示例

  • 修改数据库发现规则
ALTER DB_DISCOVERY RULE db_discovery_group_0 (
    STORAGE_UNITS(su_0, su_1, su_2),
    TYPE(NAME='MySQL.MGR',PROPERTIES('group-name'='92504d5b-6dec')),
    HEARTBEAT(PROPERTIES('keep-alive-cron'='0/5 * * * * ?'))
);

保留字

ALTER、DB_DISCOVERY、RULE、STORAGE_UNITS、TYPE、NAME、PROPERTIES、HEARTBEAT

相关链接