ALTER TRAFFIC RULE

描述

ALTER TRAFFIC RULE 语法用于修改双路由规则

语法定义

语法 铁路图

AlterTrafficRule ::=
  'ALTER' 'TRAFFIC' 'RULE'  '(' 'LABELS' '(' lableName ')' ',' trafficAlgorithmDefinition ',' loadBalancerDefinition ')'
lableName ::=
  identifier
trafficAlgorithmDefinition ::=
  'TRAFFIC_ALGORITHM' '(' 'TYPE' '(' 'NAME' '=' trafficAlgorithmTypeName (',' propertiesDefinition)? ')' ')'
loadBalancerDefinition ::=
  'LOAD_BALANCER' '(' 'TYPE' '(' 'NAME' '=' loadBalancerName (',' propertiesDefinition)? ')' ')'
propertiesDefinition ::=
  'PROPERTIES' '(' key '=' value (',' key '=' value)* ')'
trafficAlgorithmTypeName ::=
  string
loadBalancerTypeName ::=
  string
key ::= 
  string
value ::=
  literal

补充说明

• TRAFFIC_ALGORITHM 支持 SQL_MATCH 与 SQL_HINT 两种类型

• LOAD_BALANCER 支持 RANDOM 与 ROUND_ROBIN 两种类型

示例

• 修改双路由规则

ALTER TRAFFIC RULE sql_match_traffic ( 
  LABELS (OLTP),
  TRAFFIC_ALGORITHM(TYPE(NAME="SQL_MATCH",PROPERTIES("sql" = "SELECT * FROM t_order WHERE order_id = 1; UPDATE t_order SET order_id = 5;"))),
  LOAD_BALANCER(TYPE(NAME="RANDOM")));

保留字

ALTER、TRAFFIC、RULE、LABELS、TYPE、NAME、PROPERTIES、TRAFFIC_ALGORITHM、LOAD_BALANCER

相关链接

• 保留字