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

语法 铁路图

AlterDatabaseDiscoveryRule ::=
  'ALTER' 'DB_DISCOVERY' 'RULE' databaseDiscoveryDefinition (',' databaseDiscoveryDefinition)*
databaseDiscoveryDefinition ::=
  ruleName '(' 'STORAGE_UNITS' '(' storageUnitName (',' storageUnitName)* ')' ',' 'TYPE' '(' 'NAME' '=' typeName (',' propertiesDefinition)? ')' ',' 'HEARTBEAT' '(' propertiesDefinition ')' ')' 
propertiesDefinition ::=
  'PROPERTIES' '(' key '=' value (',' key '=' value)* ')'
ruleName ::=
  identifier
storageUnitName ::=
  identifier
typeName ::=
  identifier
discoveryHeartbeatName ::=
  identifier
key ::=
  string
value ::=
  literal

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(ds_0, ds_1, ds_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

• 保留字