document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/rql/rule-query/readwrite-splitting/index.xml

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    <title>读写分离 on ShardingSphere</title>
    <link>https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/rql/rule-query/readwrite-splitting/</link>
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      <title>SHOW READWRITE_SPLITTING RULE</title>
      <link>https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/rql/rule-query/readwrite-splitting/show-readwrite-splitting-rule/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/rql/rule-query/readwrite-splitting/show-readwrite-splitting-rule/</guid>
      <description>描述 SHOW READWRITE_SPLITTING RULE 语法用于查询指定逻辑库中的指定读写分离规则。
语法 语法 铁路图  ShowReadWriteSplittingRule::= &amp;#39;SHOW&amp;#39; &amp;#39;READWRITE_SPLITTING&amp;#39; (&amp;#39;RULE&amp;#39; ruleName | &amp;#39;RULES&amp;#39;) (&amp;#39;FROM&amp;#39; databaseName)? ruleName ::= identifier databaseName ::= identifier       补充说明  未指定 databaseName 时，默认是当前使用的 DATABASE。 如果也未使用 DATABASE 则会提示 No database selected。  返回值说明    列 说明     name 读写分离规则名称   write_data_source_name 写数据源名称   read_data_source_names 读数据源名称列表   transactional_read_query_strategy 事务内读请求路由策略   load_balancer_type 负载均衡算法类型   load_balancer_props 负载均衡算法参数    示例  查询指定逻辑库中的读写分离规则  SHOW READWRITE_SPLITTING RULES FROM readwrite_splitting_db; mysql&amp;gt; SHOW READWRITE_SPLITTING RULES FROM readwrite_splitting_db; +------------+-------------------------+-------------------------+-----------------------------------+--------------------+---------------------+ | name | write_storage_unit_name | read_storage_unit_names | transactional_read_query_strategy | load_balancer_type | load_balancer_props | +------------+-------------------------+-------------------------+-----------------------------------+--------------------+---------------------+ | ms_group_0 | write_ds | read_ds_0,read_ds_1 | DYNAMIC | random | | +------------+-------------------------+-------------------------+-----------------------------------+--------------------+---------------------+ 1 row in set (0.</description>
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    <item>
      <title>COUNT READWRITE_SPLITTING RULE</title>
      <link>https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/rql/rule-query/readwrite-splitting/count-readwrite-splitting-rule/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-proxy/distsql/syntax/rql/rule-query/readwrite-splitting/count-readwrite-splitting-rule/</guid>
      <description>描述 COUNT READWRITE_SPLITTING RULE 语法用于查询指定逻辑库中的读写分离规则数量。
语法 语法 铁路图  CountReadwriteSplittingRule::= &amp;#39;COUNT&amp;#39; &amp;#39;READWRITE_SPLITTING&amp;#39; &amp;#39;RULE&amp;#39; (&amp;#39;FROM&amp;#39; databaseName)? databaseName ::= identifier       补充说明  未指定 databaseName 时，默认是当前使用的 DATABASE。 如果也未使用 DATABASE 则会提示 No database selected。  返回值说明    列 说明     rule_name 规则类型   database 规则所属逻辑库   count 规则数量    示例  查询指定逻辑库中的读写分离规则数量  COUNT READWRITE_SPLITTING RULE FROM readwrite_splitting_db; mysql&amp;gt; COUNT READWRITE_SPLITTING RULE FROM readwrite_splitting_db; +---------------------+---------------------------+-------+ | rule_name | database | count | +---------------------+---------------------------+-------+ | readwrite_splitting | readwrite_splitting_db | 1 | +---------------------+---------------------------+-------+ 1 row in set (0.</description>
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